Add the clang library to the repo (with some of my changes, too).

13 files changed, 1747 insertions, 0 deletions

diff --git a/clang/utils/ABITest/ABITestGen.py b/clang/utils/ABITest/ABITestGen.py
new file mode 100755
index 0000000..62925e7
--- /dev/null
+++ b/clang/utils/ABITest/ABITestGen.py
@@ -0,0 +1,672 @@
+#!/usr/bin/env python
+
+from pprint import pprint
+import random, atexit, time
+from random import randrange
+import re
+
+from Enumeration import *
+from TypeGen import *
+
+####
+
+class TypePrinter:
+    def __init__(self, output, outputHeader=None, 
+                 outputTests=None, outputDriver=None,
+                 headerName=None, info=None):
+        self.output = output
+        self.outputHeader = outputHeader
+        self.outputTests = outputTests
+        self.outputDriver = outputDriver
+        self.writeBody = outputHeader or outputTests or outputDriver
+        self.types = {}
+        self.testValues = {}
+        self.testReturnValues = {}
+        self.layoutTests = []
+        self.declarations = set()
+
+        if info:
+            for f in (self.output,self.outputHeader,self.outputTests,self.outputDriver):
+                if f:
+                    print >>f,info
+
+        if self.writeBody:
+            print >>self.output, '#include <stdio.h>\n'
+            if self.outputTests:
+                print >>self.outputTests, '#include <stdio.h>'
+                print >>self.outputTests, '#include <string.h>'
+                print >>self.outputTests, '#include <assert.h>\n'
+
+        if headerName:
+            for f in (self.output,self.outputTests,self.outputDriver):
+                if f is not None:
+                    print >>f, '#include "%s"\n'%(headerName,)
+        
+        if self.outputDriver:
+            print >>self.outputDriver, '#include <stdio.h>'
+            print >>self.outputDriver, '#include <stdlib.h>\n'
+            print >>self.outputDriver, 'int main(int argc, char **argv) {'
+            print >>self.outputDriver, '  int index = -1;'
+            print >>self.outputDriver, '  if (argc > 1) index = atoi(argv[1]);'
+            
+    def finish(self):
+        if self.layoutTests:
+            print >>self.output, 'int main(int argc, char **argv) {'
+            print >>self.output, '  int index = -1;'
+            print >>self.output, '  if (argc > 1) index = atoi(argv[1]);'
+            for i,f in self.layoutTests:
+                print >>self.output, '  if (index == -1 || index == %d)' % i
+                print >>self.output, '    %s();' % f
+            print >>self.output, '  return 0;'
+            print >>self.output, '}' 
+
+        if self.outputDriver:
+            print >>self.outputDriver, '  printf("DONE\\n");'
+            print >>self.outputDriver, '  return 0;'
+            print >>self.outputDriver, '}'        
+
+    def addDeclaration(self, decl):
+        if decl in self.declarations:
+            return False
+
+        self.declarations.add(decl)
+        if self.outputHeader:
+            print >>self.outputHeader, decl
+        else:
+            print >>self.output, decl
+            if self.outputTests:
+                print >>self.outputTests, decl
+        return True
+
+    def getTypeName(self, T):
+        name = self.types.get(T)
+        if name is None:            
+            # Reserve slot
+            self.types[T] = None
+            self.types[T] = name = T.getTypeName(self)
+        return name
+    
+    def writeLayoutTest(self, i, ty):
+        tyName = self.getTypeName(ty)
+        tyNameClean = tyName.replace(' ','_').replace('*','star')
+        fnName = 'test_%s' % tyNameClean
+            
+        print >>self.output,'void %s(void) {' % fnName
+        self.printSizeOfType('    %s'%fnName, tyName, ty, self.output)
+        self.printAlignOfType('    %s'%fnName, tyName, ty, self.output)
+        self.printOffsetsOfType('    %s'%fnName, tyName, ty, self.output)
+        print >>self.output,'}'
+        print >>self.output
+        
+        self.layoutTests.append((i,fnName))
+        
+    def writeFunction(self, i, FT):
+        args = ', '.join(['%s arg%d'%(self.getTypeName(t),i) for i,t in enumerate(FT.argTypes)])
+        if not args:
+            args = 'void'
+
+        if FT.returnType is None:
+            retvalName = None
+            retvalTypeName = 'void'
+        else:
+            retvalTypeName = self.getTypeName(FT.returnType)
+            if self.writeBody or self.outputTests:
+                retvalName = self.getTestReturnValue(FT.returnType)
+
+        fnName = 'fn%d'%(FT.index,)
+        if self.outputHeader:
+            print >>self.outputHeader,'%s %s(%s);'%(retvalTypeName, fnName, args)
+        elif self.outputTests:
+            print >>self.outputTests,'%s %s(%s);'%(retvalTypeName, fnName, args)
+            
+        print >>self.output,'%s %s(%s)'%(retvalTypeName, fnName, args),
+        if self.writeBody:
+            print >>self.output, '{'
+            
+            for i,t in enumerate(FT.argTypes):
+                self.printValueOfType('    %s'%fnName, 'arg%d'%i, t)
+
+            if retvalName is not None:
+                print >>self.output, '  return %s;'%(retvalName,)
+            print >>self.output, '}'
+        else:
+            print >>self.output, '{}'
+        print >>self.output
+
+        if self.outputDriver:
+            print >>self.outputDriver, '  if (index == -1 || index == %d) {' % i
+            print >>self.outputDriver, '    extern void test_%s(void);' % fnName
+            print >>self.outputDriver, '    test_%s();' % fnName
+            print >>self.outputDriver, '   }'
+            
+        if self.outputTests:
+            if self.outputHeader:
+                print >>self.outputHeader, 'void test_%s(void);'%(fnName,)
+
+            if retvalName is None:
+                retvalTests = None
+            else:
+                retvalTests = self.getTestValuesArray(FT.returnType)
+            tests = map(self.getTestValuesArray, FT.argTypes)
+            print >>self.outputTests, 'void test_%s(void) {'%(fnName,)
+
+            if retvalTests is not None:
+                print >>self.outputTests, '  printf("%s: testing return.\\n");'%(fnName,)
+                print >>self.outputTests, '  for (int i=0; i<%d; ++i) {'%(retvalTests[1],)
+                args = ', '.join(['%s[%d]'%(t,randrange(l)) for t,l in tests])
+                print >>self.outputTests, '    %s RV;'%(retvalTypeName,)
+                print >>self.outputTests, '    %s = %s[i];'%(retvalName, retvalTests[0])
+                print >>self.outputTests, '    RV = %s(%s);'%(fnName, args)
+                self.printValueOfType('  %s_RV'%fnName, 'RV', FT.returnType, output=self.outputTests, indent=4)
+                self.checkTypeValues('RV', '%s[i]' % retvalTests[0], FT.returnType, output=self.outputTests, indent=4)
+                print >>self.outputTests, '  }'
+            
+            if tests:
+                print >>self.outputTests, '  printf("%s: testing arguments.\\n");'%(fnName,)
+            for i,(array,length) in enumerate(tests):
+                for j in range(length):
+                    args = ['%s[%d]'%(t,randrange(l)) for t,l in tests]
+                    args[i] = '%s[%d]'%(array,j)
+                    print >>self.outputTests, '  %s(%s);'%(fnName, ', '.join(args),)
+            print >>self.outputTests, '}'
+
+    def getTestReturnValue(self, type):
+        typeName = self.getTypeName(type)        
+        info = self.testReturnValues.get(typeName)
+        if info is None:
+            name = '%s_retval'%(typeName.replace(' ','_').replace('*','star'),)
+            print >>self.output, '%s %s;'%(typeName,name)
+            if self.outputHeader:
+                print >>self.outputHeader, 'extern %s %s;'%(typeName,name)
+            elif self.outputTests:                
+                print >>self.outputTests, 'extern %s %s;'%(typeName,name)
+            info = self.testReturnValues[typeName] = name
+        return info
+
+    def getTestValuesArray(self, type):
+        typeName = self.getTypeName(type)        
+        info = self.testValues.get(typeName)
+        if info is None:
+            name = '%s_values'%(typeName.replace(' ','_').replace('*','star'),)
+            print >>self.outputTests, 'static %s %s[] = {'%(typeName,name)
+            length = 0
+            for item in self.getTestValues(type):
+                print >>self.outputTests, '\t%s,'%(item,)
+                length += 1
+            print >>self.outputTests,'};'
+            info = self.testValues[typeName] = (name,length)
+        return info
+
+    def getTestValues(self, t):
+        if isinstance(t, BuiltinType):
+            if t.name=='float':
+                for i in ['0.0','-1.0','1.0']:
+                    yield i+'f'
+            elif t.name=='double':
+                for i in ['0.0','-1.0','1.0']:
+                    yield i
+            elif t.name in ('void *'):
+                yield '(void*) 0'
+                yield '(void*) -1'
+            else:
+                yield '(%s) 0'%(t.name,)
+                yield '(%s) -1'%(t.name,)
+                yield '(%s) 1'%(t.name,)
+        elif isinstance(t, EnumType):
+            for i in range(0, len(t.enumerators)):
+                yield 'enum%dval%d' % (t.index, i)
+        elif isinstance(t, RecordType):
+            nonPadding = [f for f in t.fields 
+                          if not f.isPaddingBitField()]
+
+            if not nonPadding:
+                yield '{ }'
+                return
+
+            # FIXME: Use designated initializers to access non-first
+            # fields of unions.
+            if t.isUnion:
+                for v in self.getTestValues(nonPadding[0]):
+                    yield '{ %s }' % v
+                return
+
+            fieldValues = map(list, map(self.getTestValues, nonPadding))
+            for i,values in enumerate(fieldValues):
+                for v in values:
+                    elements = map(random.choice,fieldValues)
+                    elements[i] = v
+                    yield '{ %s }'%(', '.join(elements))
+
+        elif isinstance(t, ComplexType):
+            for t in self.getTestValues(t.elementType):
+                yield '%s + %s * 1i'%(t,t)
+        elif isinstance(t, ArrayType):
+            values = list(self.getTestValues(t.elementType))
+            if not values:
+                yield '{ }'
+            for i in range(t.numElements):
+                for v in values:
+                    elements = [random.choice(values) for i in range(t.numElements)]
+                    elements[i] = v
+                    yield '{ %s }'%(', '.join(elements))
+        else:
+            raise NotImplementedError,'Cannot make tests values of type: "%s"'%(t,)
+
+    def printSizeOfType(self, prefix, name, t, output=None, indent=2):
+        print >>output, '%*sprintf("%s: sizeof(%s) = %%ld\\n", (long)sizeof(%s));'%(indent, '', prefix, name, name) 
+    def printAlignOfType(self, prefix, name, t, output=None, indent=2):
+        print >>output, '%*sprintf("%s: __alignof__(%s) = %%ld\\n", (long)__alignof__(%s));'%(indent, '', prefix, name, name) 
+    def printOffsetsOfType(self, prefix, name, t, output=None, indent=2):
+        if isinstance(t, RecordType):
+            for i,f in enumerate(t.fields):
+                if f.isBitField():
+                    continue
+                fname = 'field%d' % i
+                print >>output, '%*sprintf("%s: __builtin_offsetof(%s, %s) = %%ld\\n", (long)__builtin_offsetof(%s, %s));'%(indent, '', prefix, name, fname, name, fname) 
+                
+    def printValueOfType(self, prefix, name, t, output=None, indent=2):
+        if output is None:
+            output = self.output
+        if isinstance(t, BuiltinType):
+            value_expr = name
+            if t.name.split(' ')[-1] == '_Bool':
+                # Hack to work around PR5579.
+                value_expr = "%s ? 2 : 0" % name
+
+            if t.name.endswith('long long'):
+                code = 'lld'
+            elif t.name.endswith('long'):
+                code = 'ld'
+            elif t.name.split(' ')[-1] in ('_Bool','char','short',
+                                           'int','unsigned'):
+                code = 'd'
+            elif t.name in ('float','double'):
+                code = 'f'
+            elif t.name == 'long double':
+                code = 'Lf'
+            else:
+                code = 'p'
+            print >>output, '%*sprintf("%s: %s = %%%s\\n", %s);'%(
+                indent, '', prefix, name, code, value_expr)
+        elif isinstance(t, EnumType):
+            print >>output, '%*sprintf("%s: %s = %%d\\n", %s);'%(indent, '', prefix, name, name)
+        elif isinstance(t, RecordType):
+            if not t.fields:
+                print >>output, '%*sprintf("%s: %s (empty)\\n");'%(indent, '', prefix, name) 
+            for i,f in enumerate(t.fields):
+                if f.isPaddingBitField():
+                    continue
+                fname = '%s.field%d'%(name,i)
+                self.printValueOfType(prefix, fname, f, output=output, indent=indent)
+        elif isinstance(t, ComplexType):
+            self.printValueOfType(prefix, '(__real %s)'%name, t.elementType, output=output,indent=indent)
+            self.printValueOfType(prefix, '(__imag %s)'%name, t.elementType, output=output,indent=indent)
+        elif isinstance(t, ArrayType):
+            for i in range(t.numElements):
+                # Access in this fashion as a hackish way to portably
+                # access vectors.
+                if t.isVector:
+                    self.printValueOfType(prefix, '((%s*) &%s)[%d]'%(t.elementType,name,i), t.elementType, output=output,indent=indent)
+                else:
+                    self.printValueOfType(prefix, '%s[%d]'%(name,i), t.elementType, output=output,indent=indent)                    
+        else:
+            raise NotImplementedError,'Cannot print value of type: "%s"'%(t,)
+
+    def checkTypeValues(self, nameLHS, nameRHS, t, output=None, indent=2):
+        prefix = 'foo'
+        if output is None:
+            output = self.output
+        if isinstance(t, BuiltinType):
+            print >>output, '%*sassert(%s == %s);' % (indent, '', nameLHS, nameRHS)
+        elif isinstance(t, EnumType):
+            print >>output, '%*sassert(%s == %s);' % (indent, '', nameLHS, nameRHS)
+        elif isinstance(t, RecordType):
+            for i,f in enumerate(t.fields):
+                if f.isPaddingBitField():
+                    continue
+                self.checkTypeValues('%s.field%d'%(nameLHS,i), '%s.field%d'%(nameRHS,i), 
+                                     f, output=output, indent=indent)
+                if t.isUnion:
+                    break
+        elif isinstance(t, ComplexType):
+            self.checkTypeValues('(__real %s)'%nameLHS, '(__real %s)'%nameRHS, t.elementType, output=output,indent=indent)
+            self.checkTypeValues('(__imag %s)'%nameLHS, '(__imag %s)'%nameRHS, t.elementType, output=output,indent=indent)
+        elif isinstance(t, ArrayType):
+            for i in range(t.numElements):
+                # Access in this fashion as a hackish way to portably
+                # access vectors.
+                if t.isVector:
+                    self.checkTypeValues('((%s*) &%s)[%d]'%(t.elementType,nameLHS,i), 
+                                         '((%s*) &%s)[%d]'%(t.elementType,nameRHS,i), 
+                                         t.elementType, output=output,indent=indent)
+                else:
+                    self.checkTypeValues('%s[%d]'%(nameLHS,i), '%s[%d]'%(nameRHS,i), 
+                                         t.elementType, output=output,indent=indent)                    
+        else:
+            raise NotImplementedError,'Cannot print value of type: "%s"'%(t,)
+
+import sys
+
+def main():
+    from optparse import OptionParser, OptionGroup
+    parser = OptionParser("%prog [options] {indices}")
+    parser.add_option("", "--mode", dest="mode",
+                      help="autogeneration mode (random or linear) [default %default]",
+                      type='choice', choices=('random','linear'), default='linear')
+    parser.add_option("", "--count", dest="count",
+                      help="autogenerate COUNT functions according to MODE",
+                      type=int, default=0)
+    parser.add_option("", "--min", dest="minIndex", metavar="N",
+                      help="start autogeneration with the Nth function type  [default %default]",
+                      type=int, default=0)
+    parser.add_option("", "--max", dest="maxIndex", metavar="N",
+                      help="maximum index for random autogeneration  [default %default]",
+                      type=int, default=10000000)
+    parser.add_option("", "--seed", dest="seed",
+                      help="random number generator seed [default %default]",
+                      type=int, default=1)
+    parser.add_option("", "--use-random-seed", dest="useRandomSeed",
+                      help="use random value for initial random number generator seed",
+                      action='store_true', default=False)
+    parser.add_option("", "--skip", dest="skipTests",
+                      help="add a test index to skip",
+                      type=int, action='append', default=[])
+    parser.add_option("-o", "--output", dest="output", metavar="FILE",
+                      help="write output to FILE  [default %default]",
+                      type=str, default='-')
+    parser.add_option("-O", "--output-header", dest="outputHeader", metavar="FILE",
+                      help="write header file for output to FILE  [default %default]",
+                      type=str, default=None)
+    parser.add_option("-T", "--output-tests", dest="outputTests", metavar="FILE",
+                      help="write function tests to FILE  [default %default]",
+                      type=str, default=None)
+    parser.add_option("-D", "--output-driver", dest="outputDriver", metavar="FILE",
+                      help="write test driver to FILE  [default %default]",
+                      type=str, default=None)
+    parser.add_option("", "--test-layout", dest="testLayout", metavar="FILE",
+                      help="test structure layout",
+                      action='store_true', default=False)
+
+    group = OptionGroup(parser, "Type Enumeration Options")
+    # Builtins - Ints
+    group.add_option("", "--no-char", dest="useChar",
+                     help="do not generate char types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-short", dest="useShort",
+                     help="do not generate short types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-int", dest="useInt",
+                     help="do not generate int types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-long", dest="useLong",
+                     help="do not generate long types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-long-long", dest="useLongLong",
+                     help="do not generate long long types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-unsigned", dest="useUnsigned",
+                     help="do not generate unsigned integer types",
+                     action="store_false", default=True)
+
+    # Other builtins
+    group.add_option("", "--no-bool", dest="useBool",
+                     help="do not generate bool types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-float", dest="useFloat",
+                     help="do not generate float types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-double", dest="useDouble",
+                     help="do not generate double types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-long-double", dest="useLongDouble",
+                     help="do not generate long double types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-void-pointer", dest="useVoidPointer",
+                     help="do not generate void* types",
+                     action="store_false", default=True)
+
+    # Enumerations
+    group.add_option("", "--no-enums", dest="useEnum",
+                     help="do not generate enum types",
+                     action="store_false", default=True)
+
+    # Derived types
+    group.add_option("", "--no-array", dest="useArray",
+                     help="do not generate record types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-complex", dest="useComplex",
+                     help="do not generate complex types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-record", dest="useRecord",
+                     help="do not generate record types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-union", dest="recordUseUnion",
+                     help="do not generate union types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-vector", dest="useVector",
+                     help="do not generate vector types",
+                     action="store_false", default=True)
+    group.add_option("", "--no-bit-field", dest="useBitField",
+                     help="do not generate bit-field record members",
+                     action="store_false", default=True)
+    group.add_option("", "--no-builtins", dest="useBuiltins",
+                     help="do not use any types",
+                     action="store_false", default=True)
+
+    # Tuning 
+    group.add_option("", "--no-function-return", dest="functionUseReturn",
+                     help="do not generate return types for functions",
+                     action="store_false", default=True)
+    group.add_option("", "--vector-types", dest="vectorTypes",
+                     help="comma separated list of vector types (e.g., v2i32) [default %default]",
+                     action="store", type=str, default='v2i16, v1i64, v2i32, v4i16, v8i8, v2f32, v2i64, v4i32, v8i16, v16i8, v2f64, v4f32, v16f32', metavar="N")
+    group.add_option("", "--bit-fields", dest="bitFields",
+                     help="comma separated list 'type:width' bit-field specifiers [default %default]",
+                     action="store", type=str, default=(
+            "char:0,char:4,int:0,unsigned:1,int:1,int:4,int:13,int:24"))
+    group.add_option("", "--max-args", dest="functionMaxArgs",
+                     help="maximum number of arguments per function [default %default]",
+                     action="store", type=int, default=4, metavar="N")
+    group.add_option("", "--max-array", dest="arrayMaxSize",
+                     help="maximum array size [default %default]",
+                     action="store", type=int, default=4, metavar="N")
+    group.add_option("", "--max-record", dest="recordMaxSize",
+                     help="maximum number of fields per record [default %default]",
+                     action="store", type=int, default=4, metavar="N")
+    group.add_option("", "--max-record-depth", dest="recordMaxDepth",
+                     help="maximum nested structure depth [default %default]",
+                     action="store", type=int, default=None, metavar="N")
+    parser.add_option_group(group)
+    (opts, args) = parser.parse_args()
+
+    if not opts.useRandomSeed:
+        random.seed(opts.seed)
+
+    # Contruct type generator
+    builtins = []
+    if opts.useBuiltins:
+        ints = []
+        if opts.useChar: ints.append(('char',1))
+        if opts.useShort: ints.append(('short',2))
+        if opts.useInt: ints.append(('int',4))
+        # FIXME: Wrong size.
+        if opts.useLong: ints.append(('long',4))
+        if opts.useLongLong: ints.append(('long long',8))
+        if opts.useUnsigned: 
+            ints = ([('unsigned %s'%i,s) for i,s in ints] + 
+                    [('signed %s'%i,s) for i,s in ints])
+        builtins.extend(ints)
+
+        if opts.useBool: builtins.append(('_Bool',1))
+        if opts.useFloat: builtins.append(('float',4))
+        if opts.useDouble: builtins.append(('double',8))
+        if opts.useLongDouble: builtins.append(('long double',16))
+        # FIXME: Wrong size.
+        if opts.useVoidPointer:  builtins.append(('void*',4))
+
+    btg = FixedTypeGenerator([BuiltinType(n,s) for n,s in builtins])
+
+    bitfields = []
+    for specifier in opts.bitFields.split(','):
+        if not specifier.strip():
+            continue
+        name,width = specifier.strip().split(':', 1)
+        bitfields.append(BuiltinType(name,None,int(width)))
+    bftg = FixedTypeGenerator(bitfields)
+
+    charType = BuiltinType('char',1)
+    shortType = BuiltinType('short',2)
+    intType = BuiltinType('int',4)
+    longlongType = BuiltinType('long long',8)
+    floatType = BuiltinType('float',4)
+    doubleType = BuiltinType('double',8)
+    sbtg = FixedTypeGenerator([charType, intType, floatType, doubleType])
+
+    atg = AnyTypeGenerator()
+    artg = AnyTypeGenerator()
+    def makeGenerator(atg, subgen, subfieldgen, useRecord, useArray, useBitField):
+        atg.addGenerator(btg)
+        if useBitField and opts.useBitField:
+            atg.addGenerator(bftg)
+        if useRecord and opts.useRecord:
+            assert subgen 
+            atg.addGenerator(RecordTypeGenerator(subfieldgen, opts.recordUseUnion, 
+                                                 opts.recordMaxSize))
+        if opts.useComplex:
+            # FIXME: Allow overriding builtins here
+            atg.addGenerator(ComplexTypeGenerator(sbtg))
+        if useArray and opts.useArray:
+            assert subgen 
+            atg.addGenerator(ArrayTypeGenerator(subgen, opts.arrayMaxSize))
+        if opts.useVector:
+            vTypes = []
+            for i,t in enumerate(opts.vectorTypes.split(',')):
+                m = re.match('v([1-9][0-9]*)([if][1-9][0-9]*)', t.strip())
+                if not m:
+                    parser.error('Invalid vector type: %r' % t)
+                count,kind = m.groups()
+                count = int(count)
+                type = { 'i8'  : charType, 
+                         'i16' : shortType, 
+                         'i32' : intType, 
+                         'i64' : longlongType,
+                         'f32' : floatType, 
+                         'f64' : doubleType,
+                         }.get(kind)
+                if not type:
+                    parser.error('Invalid vector type: %r' % t)
+                vTypes.append(ArrayType(i, True, type, count * type.size))
+                
+            atg.addGenerator(FixedTypeGenerator(vTypes))
+        if opts.useEnum:
+            atg.addGenerator(EnumTypeGenerator([None, '-1', '1', '1u'], 1, 4))
+
+    if opts.recordMaxDepth is None: 
+        # Fully recursive, just avoid top-level arrays.
+        subFTG = AnyTypeGenerator()
+        subTG = AnyTypeGenerator()
+        atg = AnyTypeGenerator()
+        makeGenerator(subFTG, atg, atg, True, True, True)
+        makeGenerator(subTG, atg, subFTG, True, True, False)
+        makeGenerator(atg, subTG, subFTG, True, False, False)
+    else:
+        # Make a chain of type generators, each builds smaller
+        # structures.
+        base = AnyTypeGenerator()
+        fbase = AnyTypeGenerator()
+        makeGenerator(base, None, None, False, False, False)
+        makeGenerator(fbase, None, None, False, False, True)
+        for i in range(opts.recordMaxDepth):
+            n = AnyTypeGenerator()
+            fn = AnyTypeGenerator()
+            makeGenerator(n, base, fbase, True, True, False)
+            makeGenerator(fn, base, fbase, True, True, True)
+            base = n
+            fbase = fn
+        atg = AnyTypeGenerator()
+        makeGenerator(atg, base, fbase, True, False, False)
+
+    if opts.testLayout:
+        ftg = atg
+    else:
+        ftg = FunctionTypeGenerator(atg, opts.functionUseReturn, opts.functionMaxArgs)
+
+    # Override max,min,count if finite
+    if opts.maxIndex is None:
+        if ftg.cardinality is aleph0:
+            opts.maxIndex = 10000000
+        else:
+            opts.maxIndex = ftg.cardinality
+    opts.maxIndex = min(opts.maxIndex, ftg.cardinality)
+    opts.minIndex = max(0,min(opts.maxIndex-1, opts.minIndex))
+    if not opts.mode=='random':
+        opts.count = min(opts.count, opts.maxIndex-opts.minIndex)
+
+    if opts.output=='-':
+        output = sys.stdout
+    else:
+        output = open(opts.output,'w')
+        atexit.register(lambda: output.close())
+        
+    outputHeader = None
+    if opts.outputHeader:
+        outputHeader = open(opts.outputHeader,'w')
+        atexit.register(lambda: outputHeader.close())
+        
+    outputTests = None
+    if opts.outputTests:
+        outputTests = open(opts.outputTests,'w')
+        atexit.register(lambda: outputTests.close())
+
+    outputDriver = None
+    if opts.outputDriver:
+        outputDriver = open(opts.outputDriver,'w')
+        atexit.register(lambda: outputDriver.close())
+
+    info = ''
+    info += '// %s\n'%(' '.join(sys.argv),)
+    info += '// Generated: %s\n'%(time.strftime('%Y-%m-%d %H:%M'),)
+    info += '// Cardinality of function generator: %s\n'%(ftg.cardinality,)
+    info += '// Cardinality of type generator: %s\n'%(atg.cardinality,)
+
+    if opts.testLayout:
+        info += '\n#include <stdio.h>'
+    
+    P = TypePrinter(output, 
+                    outputHeader=outputHeader,
+                    outputTests=outputTests,
+                    outputDriver=outputDriver,
+                    headerName=opts.outputHeader,                    
+                    info=info)
+
+    def write(N):
+        try:
+            FT = ftg.get(N)
+        except RuntimeError,e:
+            if e.args[0]=='maximum recursion depth exceeded':
+                print >>sys.stderr,'WARNING: Skipped %d, recursion limit exceeded (bad arguments?)'%(N,)
+                return
+            raise
+        if opts.testLayout:
+            P.writeLayoutTest(N, FT)
+        else:
+            P.writeFunction(N, FT)
+
+    if args:
+        [write(int(a)) for a in args]
+
+    skipTests = set(opts.skipTests)
+    for i in range(opts.count):
+        if opts.mode=='linear':
+            index = opts.minIndex + i
+        else:
+            index = opts.minIndex + int((opts.maxIndex-opts.minIndex) * random.random())
+        if index in skipTests:
+            continue
+        write(index)
+
+    P.finish()
+
+if __name__=='__main__':
+    main()
+
diff --git a/clang/utils/ABITest/Enumeration.py b/clang/utils/ABITest/Enumeration.py
new file mode 100644
index 0000000..47e4702
--- /dev/null
+++ b/clang/utils/ABITest/Enumeration.py
@@ -0,0 +1,276 @@
+"""Utilities for enumeration of finite and countably infinite sets.
+"""
+###
+# Countable iteration
+
+# Simplifies some calculations
+class Aleph0(int):
+    _singleton = None
+    def __new__(type):
+        if type._singleton is None:
+            type._singleton = int.__new__(type)
+        return type._singleton
+    def __repr__(self): return '<aleph0>'
+    def __str__(self): return 'inf'
+    
+    def __cmp__(self, b):
+        return 1
+
+    def __sub__(self, b):
+        raise ValueError,"Cannot subtract aleph0"
+    __rsub__ = __sub__
+
+    def __add__(self, b): 
+        return self
+    __radd__ = __add__
+
+    def __mul__(self, b): 
+        if b == 0: return b            
+        return self
+    __rmul__ = __mul__
+
+    def __floordiv__(self, b):
+        if b == 0: raise ZeroDivisionError
+        return self
+    __rfloordiv__ = __floordiv__
+    __truediv__ = __floordiv__
+    __rtuediv__ = __floordiv__
+    __div__ = __floordiv__
+    __rdiv__ = __floordiv__
+
+    def __pow__(self, b):
+        if b == 0: return 1
+        return self
+aleph0 = Aleph0()
+
+def base(line):
+    return line*(line+1)//2
+
+def pairToN((x,y)):
+    line,index = x+y,y
+    return base(line)+index
+
+def getNthPairInfo(N):
+    # Avoid various singularities
+    if N==0:
+        return (0,0)
+
+    # Gallop to find bounds for line
+    line = 1
+    next = 2
+    while base(next)<=N:
+        line = next
+        next = line << 1
+    
+    # Binary search for starting line
+    lo = line
+    hi = line<<1
+    while lo + 1 != hi:
+        #assert base(lo) <= N < base(hi)
+        mid = (lo + hi)>>1
+        if base(mid)<=N:
+            lo = mid
+        else:
+            hi = mid
+
+    line = lo
+    return line, N - base(line)
+
+def getNthPair(N):
+    line,index = getNthPairInfo(N)
+    return (line - index, index)
+
+def getNthPairBounded(N,W=aleph0,H=aleph0,useDivmod=False):
+    """getNthPairBounded(N, W, H) -> (x, y)
+    
+    Return the N-th pair such that 0 <= x < W and 0 <= y < H."""
+
+    if W <= 0 or H <= 0:
+        raise ValueError,"Invalid bounds"
+    elif N >= W*H:
+        raise ValueError,"Invalid input (out of bounds)"
+
+    # Simple case...
+    if W is aleph0 and H is aleph0:
+        return getNthPair(N)
+
+    # Otherwise simplify by assuming W < H
+    if H < W:
+        x,y = getNthPairBounded(N,H,W,useDivmod=useDivmod)
+        return y,x
+
+    if useDivmod:
+        return N%W,N//W
+    else:
+        # Conceptually we want to slide a diagonal line across a
+        # rectangle. This gives more interesting results for large
+        # bounds than using divmod.
+        
+        # If in lower left, just return as usual
+        cornerSize = base(W)
+        if N < cornerSize:
+            return getNthPair(N)
+
+        # Otherwise if in upper right, subtract from corner
+        if H is not aleph0:
+            M = W*H - N - 1
+            if M < cornerSize:
+                x,y = getNthPair(M)
+                return (W-1-x,H-1-y)
+
+        # Otherwise, compile line and index from number of times we
+        # wrap.
+        N = N - cornerSize
+        index,offset = N%W,N//W
+        # p = (W-1, 1+offset) + (-1,1)*index
+        return (W-1-index, 1+offset+index)
+def getNthPairBoundedChecked(N,W=aleph0,H=aleph0,useDivmod=False,GNP=getNthPairBounded):
+    x,y = GNP(N,W,H,useDivmod)
+    assert 0 <= x < W and 0 <= y < H
+    return x,y
+
+def getNthNTuple(N, W, H=aleph0, useLeftToRight=False):
+    """getNthNTuple(N, W, H) -> (x_0, x_1, ..., x_W)
+
+    Return the N-th W-tuple, where for 0 <= x_i < H."""
+
+    if useLeftToRight:
+        elts = [None]*W
+        for i in range(W):
+            elts[i],N = getNthPairBounded(N, H)
+        return tuple(elts)
+    else:
+        if W==0:
+            return ()
+        elif W==1:
+            return (N,)
+        elif W==2:
+            return getNthPairBounded(N, H, H)
+        else:
+            LW,RW = W//2, W - (W//2)
+            L,R = getNthPairBounded(N, H**LW, H**RW)
+            return (getNthNTuple(L,LW,H=H,useLeftToRight=useLeftToRight) + 
+                    getNthNTuple(R,RW,H=H,useLeftToRight=useLeftToRight))
+def getNthNTupleChecked(N, W, H=aleph0, useLeftToRight=False, GNT=getNthNTuple):
+    t = GNT(N,W,H,useLeftToRight)
+    assert len(t) == W
+    for i in t:
+        assert i < H
+    return t
+
+def getNthTuple(N, maxSize=aleph0, maxElement=aleph0, useDivmod=False, useLeftToRight=False):
+    """getNthTuple(N, maxSize, maxElement) -> x
+
+    Return the N-th tuple where len(x) < maxSize and for y in x, 0 <=
+    y < maxElement."""
+
+    # All zero sized tuples are isomorphic, don't ya know.
+    if N == 0:
+        return ()
+    N -= 1
+    if maxElement is not aleph0:
+        if maxSize is aleph0:
+            raise NotImplementedError,'Max element size without max size unhandled'
+        bounds = [maxElement**i for i in range(1, maxSize+1)]
+        S,M = getNthPairVariableBounds(N, bounds)
+    else:
+        S,M = getNthPairBounded(N, maxSize, useDivmod=useDivmod)
+    return getNthNTuple(M, S+1, maxElement, useLeftToRight=useLeftToRight)
+def getNthTupleChecked(N, maxSize=aleph0, maxElement=aleph0, 
+                       useDivmod=False, useLeftToRight=False, GNT=getNthTuple):
+    # FIXME: maxsize is inclusive
+    t = GNT(N,maxSize,maxElement,useDivmod,useLeftToRight)
+    assert len(t) <= maxSize
+    for i in t:
+        assert i < maxElement
+    return t
+
+def getNthPairVariableBounds(N, bounds):
+    """getNthPairVariableBounds(N, bounds) -> (x, y)
+
+    Given a finite list of bounds (which may be finite or aleph0),
+    return the N-th pair such that 0 <= x < len(bounds) and 0 <= y <
+    bounds[x]."""
+
+    if not bounds:
+        raise ValueError,"Invalid bounds"
+    if not (0 <= N < sum(bounds)):
+        raise ValueError,"Invalid input (out of bounds)"
+
+    level = 0
+    active = range(len(bounds))
+    active.sort(key=lambda i: bounds[i])
+    prevLevel = 0
+    for i,index in enumerate(active):
+        level = bounds[index]
+        W = len(active) - i
+        if level is aleph0:
+            H = aleph0
+        else:
+            H = level - prevLevel
+        levelSize = W*H
+        if N<levelSize: # Found the level
+            idelta,delta = getNthPairBounded(N, W, H)
+            return active[i+idelta],prevLevel+delta
+        else:
+            N -= levelSize
+            prevLevel = level
+    else:
+        raise RuntimError,"Unexpected loop completion"
+
+def getNthPairVariableBoundsChecked(N, bounds, GNVP=getNthPairVariableBounds):
+    x,y = GNVP(N,bounds)
+    assert 0 <= x < len(bounds) and 0 <= y < bounds[x]
+    return (x,y)
+
+###
+
+def testPairs():
+    W = 3
+    H = 6
+    a = [['  ' for x in range(10)] for y in range(10)]
+    b = [['  ' for x in range(10)] for y in range(10)]
+    for i in range(min(W*H,40)):
+        x,y = getNthPairBounded(i,W,H)
+        x2,y2 = getNthPairBounded(i,W,H,useDivmod=True)
+        print i,(x,y),(x2,y2)
+        a[y][x] = '%2d'%i
+        b[y2][x2] = '%2d'%i
+
+    print '-- a --'
+    for ln in a[::-1]:
+        if ''.join(ln).strip():
+            print '  '.join(ln)
+    print '-- b --'
+    for ln in b[::-1]:
+        if ''.join(ln).strip():
+            print '  '.join(ln)
+
+def testPairsVB():
+    bounds = [2,2,4,aleph0,5,aleph0]
+    a = [['  ' for x in range(15)] for y in range(15)]
+    b = [['  ' for x in range(15)] for y in range(15)]
+    for i in range(min(sum(bounds),40)):
+        x,y = getNthPairVariableBounds(i, bounds)
+        print i,(x,y)
+        a[y][x] = '%2d'%i
+
+    print '-- a --'
+    for ln in a[::-1]:
+        if ''.join(ln).strip():
+            print '  '.join(ln)
+
+###
+
+# Toggle to use checked versions of enumeration routines.
+if False:
+    getNthPairVariableBounds = getNthPairVariableBoundsChecked
+    getNthPairBounded = getNthPairBoundedChecked
+    getNthNTuple = getNthNTupleChecked
+    getNthTuple = getNthTupleChecked
+
+if __name__ == '__main__':
+    testPairs()
+
+    testPairsVB()
+
diff --git a/clang/utils/ABITest/Makefile.test.common b/clang/utils/ABITest/Makefile.test.common
new file mode 100644
index 0000000..3c208ad
--- /dev/null
+++ b/clang/utils/ABITest/Makefile.test.common
@@ -0,0 +1,170 @@
+# -*- Makefile -*-
+
+# Usage: make test.N.report 
+#
+# COUNT can be over-ridden to change the number of tests generated per
+# file, and TESTARGS is used to change the type generation. Make sure
+# to 'make clean' after changing either of these parameters.
+
+TESTARGS := --no-unsigned --no-vector --no-complex --no-bool
+
+COUNT := 1
+TIMEOUT := 5
+
+CFLAGS := -std=gnu99
+
+X_COMPILER := gcc
+X_LL_CFLAGS := -emit-llvm -S
+Y_COMPILER := clang
+Y_LL_CFLAGS := -emit-llvm -S
+CC := gcc
+
+###
+
+ABITESTGEN := ../ABITestGen.py
+
+ifndef VERBOSE
+  Verb := @
+endif
+
+.PHONY: test.%.report
+test.%.report: temps/test.%.xx.diff temps/test.%.xy.diff temps/test.%.yx.diff temps/test.%.yy.diff
+	@ok=1;\
+	for t in $^; do \
+		if [ -s $$t ]; then \
+			echo "TEST $*: $$t failed"; \
+			ok=0;\
+		fi; \
+	done; \
+	if [ $$ok -eq 1 ]; then \
+		true; \
+	else \
+		false; \
+	fi
+
+
+.PHONY: test.%.defs-report
+test.%.defs-report: temps/test.%.defs.diff
+	@for t in $^; do \
+		if [ -s $$t ]; then \
+			echo "TEST $*: $$t failed"; \
+			cat $$t; \
+		fi; \
+	done
+
+.PHONY: test.%.build
+test.%.build: temps/test.%.ref temps/test.%.xx temps/test.%.xy temps/test.%.yx temps/test.%.yy temps/test.%.x.defs temps/test.%.y.defs
+	@true
+
+###
+
+# Diffs and output
+
+.PRECIOUS: temps/.dir
+
+.PRECIOUS: temps/test.%.xx.diff
+temps/test.%.xx.diff: temps/test.%.ref.out temps/test.%.xx.out
+	$(Verb) diff $^ > $@ || true
+.PRECIOUS: temps/test.%.xy.diff
+temps/test.%.xy.diff: temps/test.%.ref.out temps/test.%.xy.out
+	$(Verb) diff $^ > $@ || true
+.PRECIOUS: temps/test.%.yx.diff
+temps/test.%.yx.diff: temps/test.%.ref.out temps/test.%.yx.out
+	$(Verb) diff $^ > $@ || true
+.PRECIOUS: temps/test.%.yy.diff
+temps/test.%.yy.diff: temps/test.%.ref.out temps/test.%.yy.out
+	$(Verb) diff $^ > $@ || true
+.PRECIOUS: temps/test.%.defs.diff
+temps/test.%.defs.diff: temps/test.%.x.defs temps/test.%.y.defs
+	$(Verb) zipdifflines \
+	  --replace "%struct.T[0-9]+" "%struct.s" \
+	  --replace "%union.T[0-9]+" "%struct.s" \
+	  --replace "byval align [0-9]+" "byval" \
+	  $^ > $@
+
+.PRECIOUS: temps/test.%.out
+temps/test.%.out: temps/test.%
+	-$(Verb) ./$< > $@
+
+# Executables
+
+.PRECIOUS: temps/test.%.ref
+temps/test.%.ref: temps/test.%.driver.ref.o temps/test.%.a.ref.o temps/test.%.b.ref.o
+	$(Verb) $(CC) $(CFLAGS) $(CC_CFLAGS) -O3 -o $@ $^
+.PRECIOUS: temps/test.%.xx
+temps/test.%.xx: temps/test.%.driver.ref.o temps/test.%.a.x.o temps/test.%.b.x.o
+	$(Verb) $(CC) $(CFLAGS) $(CC_CFLAGS) -O3  -o $@ $^
+.PRECIOUS: temps/test.%.xy
+temps/test.%.xy: temps/test.%.driver.ref.o temps/test.%.a.x.o temps/test.%.b.y.o
+	$(Verb) $(CC) $(CFLAGS) $(CC_CFLAGS) -O3  -o $@ $^
+.PRECIOUS: temps/test.%.yx
+temps/test.%.yx: temps/test.%.driver.ref.o temps/test.%.a.y.o temps/test.%.b.x.o
+	$(Verb) $(CC) $(CFLAGS) $(CC_CFLAGS) -O3  -o $@ $^
+.PRECIOUS: temps/test.%.yy
+temps/test.%.yy: temps/test.%.driver.ref.o temps/test.%.a.y.o temps/test.%.b.y.o
+	$(Verb) $(CC) $(CFLAGS) $(CC_CFLAGS) -O3  -o $@ $^
+
+# Object files
+
+.PRECIOUS: temps/test.%.ref.o
+temps/test.%.ref.o: inputs/test.%.c temps/.dir
+	$(Verb) $(CC) -c $(CFLAGS) $(CC_CFLAGS) -o $@ $<
+.PRECIOUS: temps/test.%.x.o
+temps/test.%.x.o: inputs/test.%.c temps/.dir
+	$(Verb) $(X_COMPILER) -c $(CFLAGS) $(X_CFLAGS) -o $@ $<
+.PRECIOUS: temps/test.%.y.o
+temps/test.%.y.o: inputs/test.%.c temps/.dir
+	$(Verb) $(Y_COMPILER) -c $(CFLAGS) $(Y_CFLAGS) -o $@ $<
+
+.PRECIOUS: temps/test.%.x.defs
+temps/test.%.x.defs: temps/test.%.a.x.ll temps/.dir
+	-$(Verb) -grep '^define ' $< > $@
+.PRECIOUS: temps/test.%.y.defs
+temps/test.%.y.defs: temps/test.%.a.y.ll temps/.dir
+	-$(Verb) -grep '^define ' $< > $@
+
+.PRECIOUS: temps/test.%.a.x.ll
+temps/test.%.a.x.ll: inputs/test.%.a.c temps/.dir
+	$(Verb) $(X_COMPILER) $(CFLAGS) $(X_LL_CFLAGS) $(X_CFLAGS) -o $@ $<
+.PRECIOUS: temps/test.%.b.x.ll
+temps/test.%.b.x.ll: inputs/test.%.b.c temps/.dir
+	$(Verb) $(X_COMPILER) $(CFLAGS) $(X_LL_CFLAGS) $(X_CFLAGS) -o $@ $<
+.PRECIOUS: temps/test.%.a.y.ll
+temps/test.%.a.y.ll: inputs/test.%.a.c temps/.dir
+	$(Verb) $(Y_COMPILER) $(CFLAGS) $(Y_LL_CFLAGS) $(Y_CFLAGS) -o $@ $<
+.PRECIOUS: temps/test.%.b.y.ll
+temps/test.%.b.y.ll: inputs/test.%.b.c temps/.dir
+	$(Verb) $(Y_COMPILER) $(CFLAGS) $(Y_LL_CFLAGS) $(Y_CFLAGS) -o $@ $<
+
+# Input generation
+
+.PHONY: test.%.top
+test.%.top: inputs/test.%.a.c inputs/test.%.b.c inputs/test.%.driver.c
+	@true
+
+.PRECIOUS: inputs/test.%.a.c inputs/test.%.b.c inputs/test.%.driver.c
+inputs/test.%.a.c: test.%.generate
+	@true
+inputs/test.%.b.c: test.%.generate
+	@true
+inputs/test.%.driver.c: test.%.generate
+	@true
+
+.PHONY: test.%.generate
+.PRECIOUS: inputs/.dir
+test.%.generate: $(ABITESTGEN) inputs/.dir
+	$(Verb) $(ABITESTGEN) $(TESTARGS) -o inputs/test.$*.a.c -T inputs/test.$*.b.c -D inputs/test.$*.driver.c --min=$(shell expr $* '*' $(COUNT))  --count=$(COUNT)
+
+# Cleaning
+
+clean-temps:
+	$(Verb) rm -rf temps
+
+clean:
+	$(Verb) rm -rf temps inputs
+
+# Etc.
+
+%/.dir:
+	$(Verb) mkdir -p $* > /dev/null
+	$(Verb) $(DATE) > $@
diff --git a/clang/utils/ABITest/TypeGen.py b/clang/utils/ABITest/TypeGen.py
new file mode 100644
index 0000000..7a99d62
--- /dev/null
+++ b/clang/utils/ABITest/TypeGen.py
@@ -0,0 +1,471 @@
+"""Flexible enumeration of C types."""
+
+from Enumeration import *
+
+# TODO:
+
+#  - struct improvements (flexible arrays, packed &
+#    unpacked, alignment)
+#  - objective-c qualified id
+#  - anonymous / transparent unions
+#  - VLAs
+#  - block types
+#  - K&R functions
+#  - pass arguments of different types (test extension, transparent union)
+#  - varargs
+
+###
+# Actual type types
+
+class Type:
+    def isBitField(self):
+        return False
+
+    def isPaddingBitField(self):
+        return False
+
+    def getTypeName(self, printer):
+        name = 'T%d' % len(printer.types)
+        typedef = self.getTypedefDef(name, printer)
+        printer.addDeclaration(typedef)
+        return name
+
+class BuiltinType(Type):
+    def __init__(self, name, size, bitFieldSize=None):
+        self.name = name
+        self.size = size
+        self.bitFieldSize = bitFieldSize
+
+    def isBitField(self):
+        return self.bitFieldSize is not None
+
+    def isPaddingBitField(self):
+        return self.bitFieldSize is 0
+
+    def getBitFieldSize(self):
+        assert self.isBitField()
+        return self.bitFieldSize
+
+    def getTypeName(self, printer):
+        return self.name
+
+    def sizeof(self):
+        return self.size
+
+    def __str__(self):
+        return self.name
+
+class EnumType(Type):
+    def __init__(self, index, enumerators):
+        self.index = index
+        self.enumerators = enumerators
+
+    def getEnumerators(self):
+        result = ''
+        for i, init in enumerate(self.enumerators):
+            if i > 0:
+                result = result + ', '
+            result = result + 'enum%dval%d' % (self.index, i)
+            if init:
+                result = result + ' = %s' % (init)
+
+        return result
+
+    def __str__(self):
+        return 'enum { %s }' % (self.getEnumerators())
+
+    def getTypedefDef(self, name, printer):
+        return 'typedef enum %s { %s } %s;'%(name, self.getEnumerators(), name)
+
+class RecordType(Type):
+    def __init__(self, index, isUnion, fields):
+        self.index = index
+        self.isUnion = isUnion
+        self.fields = fields
+        self.name = None
+
+    def __str__(self):
+        def getField(t):
+            if t.isBitField():
+                return "%s : %d;" % (t, t.getBitFieldSize())
+            else:
+                return "%s;" % t
+
+        return '%s { %s }'%(('struct','union')[self.isUnion],
+                            ' '.join(map(getField, self.fields)))
+
+    def getTypedefDef(self, name, printer):
+        def getField((i, t)):
+            if t.isBitField():
+                if t.isPaddingBitField():
+                    return '%s : 0;'%(printer.getTypeName(t),)
+                else:
+                    return '%s field%d : %d;'%(printer.getTypeName(t),i,
+                                               t.getBitFieldSize())
+            else:
+                return '%s field%d;'%(printer.getTypeName(t),i)
+        fields = map(getField, enumerate(self.fields))
+        # Name the struct for more readable LLVM IR.
+        return 'typedef %s %s { %s } %s;'%(('struct','union')[self.isUnion],
+                                           name, ' '.join(fields), name)
+                                           
+class ArrayType(Type):
+    def __init__(self, index, isVector, elementType, size):
+        if isVector:
+            # Note that for vectors, this is the size in bytes.
+            assert size > 0
+        else:
+            assert size is None or size >= 0
+        self.index = index
+        self.isVector = isVector
+        self.elementType = elementType
+        self.size = size
+        if isVector:
+            eltSize = self.elementType.sizeof()
+            assert not (self.size % eltSize)
+            self.numElements = self.size // eltSize
+        else:
+            self.numElements = self.size
+
+    def __str__(self):
+        if self.isVector:
+            return 'vector (%s)[%d]'%(self.elementType,self.size)
+        elif self.size is not None:
+            return '(%s)[%d]'%(self.elementType,self.size)
+        else:
+            return '(%s)[]'%(self.elementType,)
+
+    def getTypedefDef(self, name, printer):
+        elementName = printer.getTypeName(self.elementType)
+        if self.isVector:
+            return 'typedef %s %s __attribute__ ((vector_size (%d)));'%(elementName,
+                                                                        name,
+                                                                        self.size)
+        else:
+            if self.size is None:
+                sizeStr = ''
+            else:
+                sizeStr = str(self.size)
+            return 'typedef %s %s[%s];'%(elementName, name, sizeStr)
+
+class ComplexType(Type):
+    def __init__(self, index, elementType):
+        self.index = index
+        self.elementType = elementType
+
+    def __str__(self):
+        return '_Complex (%s)'%(self.elementType)
+
+    def getTypedefDef(self, name, printer):
+        return 'typedef _Complex %s %s;'%(printer.getTypeName(self.elementType), name)
+
+class FunctionType(Type):
+    def __init__(self, index, returnType, argTypes):
+        self.index = index
+        self.returnType = returnType
+        self.argTypes = argTypes
+
+    def __str__(self):
+        if self.returnType is None:
+            rt = 'void'
+        else:
+            rt = str(self.returnType)
+        if not self.argTypes:
+            at = 'void'
+        else:
+            at = ', '.join(map(str, self.argTypes))
+        return '%s (*)(%s)'%(rt, at)
+
+    def getTypedefDef(self, name, printer):
+        if self.returnType is None:
+            rt = 'void'
+        else:
+            rt = str(self.returnType)
+        if not self.argTypes:
+            at = 'void'
+        else:
+            at = ', '.join(map(str, self.argTypes))
+        return 'typedef %s (*%s)(%s);'%(rt, name, at)
+
+###
+# Type enumerators
+
+class TypeGenerator(object):
+    def __init__(self):
+        self.cache = {}
+
+    def setCardinality(self):
+        abstract
+
+    def get(self, N):
+        T = self.cache.get(N)
+        if T is None:
+            assert 0 <= N < self.cardinality
+            T = self.cache[N] = self.generateType(N)
+        return T
+
+    def generateType(self, N):
+        abstract
+
+class FixedTypeGenerator(TypeGenerator):
+    def __init__(self, types):
+        TypeGenerator.__init__(self)
+        self.types = types
+        self.setCardinality()
+
+    def setCardinality(self):
+        self.cardinality = len(self.types)
+
+    def generateType(self, N):
+        return self.types[N]
+
+# Factorial
+def fact(n):
+    result = 1
+    while n > 0:
+        result = result * n
+        n = n - 1
+    return result
+
+# Compute the number of combinations (n choose k)
+def num_combinations(n, k): 
+    return fact(n) / (fact(k) * fact(n - k))
+
+# Enumerate the combinations choosing k elements from the list of values
+def combinations(values, k):
+    # From ActiveState Recipe 190465: Generator for permutations,
+    # combinations, selections of a sequence
+    if k==0: yield []
+    else:
+        for i in xrange(len(values)-k+1):
+            for cc in combinations(values[i+1:],k-1):
+                yield [values[i]]+cc
+
+class EnumTypeGenerator(TypeGenerator):
+    def __init__(self, values, minEnumerators, maxEnumerators):
+        TypeGenerator.__init__(self)
+        self.values = values
+        self.minEnumerators = minEnumerators
+        self.maxEnumerators = maxEnumerators
+        self.setCardinality()
+
+    def setCardinality(self):
+        self.cardinality = 0
+        for num in range(self.minEnumerators, self.maxEnumerators + 1):
+            self.cardinality += num_combinations(len(self.values), num)
+
+    def generateType(self, n):
+        # Figure out the number of enumerators in this type
+        numEnumerators = self.minEnumerators
+        valuesCovered = 0
+        while numEnumerators < self.maxEnumerators:
+            comb = num_combinations(len(self.values), numEnumerators)
+            if valuesCovered + comb > n:
+                break
+            numEnumerators = numEnumerators + 1
+            valuesCovered += comb
+
+        # Find the requested combination of enumerators and build a
+        # type from it.
+        i = 0
+        for enumerators in combinations(self.values, numEnumerators):
+            if i == n - valuesCovered:
+                return EnumType(n, enumerators)
+                
+            i = i + 1
+
+        assert False
+
+class ComplexTypeGenerator(TypeGenerator):
+    def __init__(self, typeGen):
+        TypeGenerator.__init__(self)
+        self.typeGen = typeGen
+        self.setCardinality()
+    
+    def setCardinality(self):
+        self.cardinality = self.typeGen.cardinality
+
+    def generateType(self, N):
+        return ComplexType(N, self.typeGen.get(N))
+
+class VectorTypeGenerator(TypeGenerator):
+    def __init__(self, typeGen, sizes):
+        TypeGenerator.__init__(self)
+        self.typeGen = typeGen
+        self.sizes = tuple(map(int,sizes))
+        self.setCardinality()
+
+    def setCardinality(self):
+        self.cardinality = len(self.sizes)*self.typeGen.cardinality
+
+    def generateType(self, N):
+        S,T = getNthPairBounded(N, len(self.sizes), self.typeGen.cardinality)
+        return ArrayType(N, True, self.typeGen.get(T), self.sizes[S])
+
+class FixedArrayTypeGenerator(TypeGenerator):
+    def __init__(self, typeGen, sizes):
+        TypeGenerator.__init__(self)
+        self.typeGen = typeGen
+        self.sizes = tuple(size)
+        self.setCardinality()
+
+    def setCardinality(self):
+        self.cardinality = len(self.sizes)*self.typeGen.cardinality
+
+    def generateType(self, N):
+        S,T = getNthPairBounded(N, len(self.sizes), self.typeGen.cardinality)
+        return ArrayType(N, false, self.typeGen.get(T), self.sizes[S])
+
+class ArrayTypeGenerator(TypeGenerator):
+    def __init__(self, typeGen, maxSize, useIncomplete=False, useZero=False):
+        TypeGenerator.__init__(self)
+        self.typeGen = typeGen
+        self.useIncomplete = useIncomplete
+        self.useZero = useZero
+        self.maxSize = int(maxSize)
+        self.W = useIncomplete + useZero + self.maxSize
+        self.setCardinality()
+
+    def setCardinality(self):
+        self.cardinality = self.W * self.typeGen.cardinality
+
+    def generateType(self, N):
+        S,T = getNthPairBounded(N, self.W, self.typeGen.cardinality)
+        if self.useIncomplete:
+            if S==0:
+                size = None
+                S = None
+            else:
+                S = S - 1
+        if S is not None:
+            if self.useZero:
+                size = S
+            else:
+                size = S + 1        
+        return ArrayType(N, False, self.typeGen.get(T), size)
+
+class RecordTypeGenerator(TypeGenerator):
+    def __init__(self, typeGen, useUnion, maxSize):
+        TypeGenerator.__init__(self)
+        self.typeGen = typeGen
+        self.useUnion = bool(useUnion)
+        self.maxSize = int(maxSize)
+        self.setCardinality()
+
+    def setCardinality(self):
+        M = 1 + self.useUnion
+        if self.maxSize is aleph0:
+            S =  aleph0 * self.typeGen.cardinality
+        else:
+            S = 0
+            for i in range(self.maxSize+1):
+                S += M * (self.typeGen.cardinality ** i)
+        self.cardinality = S
+
+    def generateType(self, N):
+        isUnion,I = False,N
+        if self.useUnion:
+            isUnion,I = (I&1),I>>1
+        fields = map(self.typeGen.get,getNthTuple(I,self.maxSize,self.typeGen.cardinality))
+        return RecordType(N, isUnion, fields)
+
+class FunctionTypeGenerator(TypeGenerator):
+    def __init__(self, typeGen, useReturn, maxSize):
+        TypeGenerator.__init__(self)
+        self.typeGen = typeGen
+        self.useReturn = useReturn
+        self.maxSize = maxSize
+        self.setCardinality()
+    
+    def setCardinality(self):
+        if self.maxSize is aleph0:
+            S = aleph0 * self.typeGen.cardinality()
+        elif self.useReturn:
+            S = 0
+            for i in range(1,self.maxSize+1+1):
+                S += self.typeGen.cardinality ** i
+        else:
+            S = 0
+            for i in range(self.maxSize+1):
+                S += self.typeGen.cardinality ** i
+        self.cardinality = S
+    
+    def generateType(self, N):
+        if self.useReturn:
+            # Skip the empty tuple
+            argIndices = getNthTuple(N+1, self.maxSize+1, self.typeGen.cardinality)
+            retIndex,argIndices = argIndices[0],argIndices[1:]
+            retTy = self.typeGen.get(retIndex)
+        else:
+            retTy = None
+            argIndices = getNthTuple(N, self.maxSize, self.typeGen.cardinality)
+        args = map(self.typeGen.get, argIndices)
+        return FunctionType(N, retTy, args)
+
+class AnyTypeGenerator(TypeGenerator):
+    def __init__(self):
+        TypeGenerator.__init__(self)
+        self.generators = []
+        self.bounds = []
+        self.setCardinality()
+        self._cardinality = None
+        
+    def getCardinality(self):
+        if self._cardinality is None:
+            return aleph0
+        else:
+            return self._cardinality
+    def setCardinality(self):
+        self.bounds = [g.cardinality for g in self.generators]
+        self._cardinality = sum(self.bounds)
+    cardinality = property(getCardinality, None)
+
+    def addGenerator(self, g):
+        self.generators.append(g)
+        for i in range(100):
+            prev = self._cardinality
+            self._cardinality = None
+            for g in self.generators:
+                g.setCardinality()
+            self.setCardinality()
+            if (self._cardinality is aleph0) or prev==self._cardinality:
+                break
+        else:
+            raise RuntimeError,"Infinite loop in setting cardinality"
+
+    def generateType(self, N):
+        index,M = getNthPairVariableBounds(N, self.bounds)
+        return self.generators[index].get(M)
+
+def test():
+    fbtg = FixedTypeGenerator([BuiltinType('char', 4),
+                               BuiltinType('char', 4, 0),
+                               BuiltinType('int',  4, 5)])
+
+    fields1 = AnyTypeGenerator()
+    fields1.addGenerator( fbtg )
+
+    fields0 = AnyTypeGenerator()
+    fields0.addGenerator( fbtg )
+#    fields0.addGenerator( RecordTypeGenerator(fields1, False, 4) )
+
+    btg = FixedTypeGenerator([BuiltinType('char', 4),
+                              BuiltinType('int',  4)])
+    etg = EnumTypeGenerator([None, '-1', '1', '1u'], 0, 3)
+
+    atg = AnyTypeGenerator()
+    atg.addGenerator( btg )
+    atg.addGenerator( RecordTypeGenerator(fields0, False, 4) )
+    atg.addGenerator( etg )
+    print 'Cardinality:',atg.cardinality
+    for i in range(100):
+        if i == atg.cardinality:
+            try:
+                atg.get(i)
+                raise RuntimeError,"Cardinality was wrong"
+            except AssertionError:
+                break
+        print '%4d: %s'%(i, atg.get(i))
+
+if __name__ == '__main__':
+    test()
diff --git a/clang/utils/ABITest/build-and-summarize-all.sh b/clang/utils/ABITest/build-and-summarize-all.sh
new file mode 100755
index 0000000..23e34a4
--- /dev/null
+++ b/clang/utils/ABITest/build-and-summarize-all.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -eu
+
+if [ $# != 1 ]; then
+    echo "usage: $0 <num-tests>"
+    exit 1
+fi
+
+for bits in 32 64; do
+    for kind in return-types single-args; do
+        echo "-- $kind-$bits --"
+        (cd $kind-$bits && ../build-and-summarize.sh $1)
+    done
+done
diff --git a/clang/utils/ABITest/build-and-summarize.sh b/clang/utils/ABITest/build-and-summarize.sh
new file mode 100755
index 0000000..602728b
--- /dev/null
+++ b/clang/utils/ABITest/build-and-summarize.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+set -eu
+
+if [ $# != 1 ]; then
+    echo "usage: $0 <num-tests>"
+    exit 1
+fi
+
+dir=$(dirname $0)
+$dir/build.sh $1 &> /dev/null || true
+../summarize.sh $1 &> fails-x.txt
+cat fails-x.txt
+wc -l fails-x.txt
diff --git a/clang/utils/ABITest/build.sh b/clang/utils/ABITest/build.sh
new file mode 100755
index 0000000..a50d14a
--- /dev/null
+++ b/clang/utils/ABITest/build.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -eu
+
+if [ $# != 1 ]; then
+    echo "usage: $0 <num-tests>"
+    exit 1
+fi
+
+CPUS=2
+make -j $CPUS \
+  $(for i in $(seq 0 $1); do echo test.$i.report; done) -k
diff --git a/clang/utils/ABITest/layout/Makefile b/clang/utils/ABITest/layout/Makefile
new file mode 100644
index 0000000..0520625
--- /dev/null
+++ b/clang/utils/ABITest/layout/Makefile
@@ -0,0 +1,68 @@
+# Usage: make test.N.report 
+#
+# COUNT can be over-ridden to change the number of tests generated per
+# file, and TESTARGS is used to change the type generation. Make sure
+# to 'make clean' after changing either of these parameters.
+
+ABITESTGEN := ../ABITestGen.py
+TESTARGS := --max-args 0 --test-layout
+COUNT := 1000
+TIMEOUT := 5
+
+CFLAGS := -std=gnu99
+
+X_COMPILER := llvm-gcc
+Y_COMPILER := clang
+CC := gcc
+
+ifeq (0, 0)
+X_CFLAGS := -m32
+Y_CFLAGS := -m32
+CC_CFLAGS := -m32
+else
+X_CFLAGS := -m64
+Y_CFLAGS := -m64
+CC_CFLAGS := -m64
+endif
+
+.PHONY: test.%.report
+test.%.report: test.%.x.diff test.%.y.diff
+	@for t in $^; do \
+		if [ -s $$t ]; then \
+			echo "TEST $*: $$t failed"; \
+		fi; \
+	done
+
+.PHONY: test.%.build
+test.%.build: test.%.ref test.%.x test.%.y
+	@true
+
+###
+
+.PRECIOUS: test.%.x.diff
+test.%.x.diff: test.%.ref.out test.%.x.out
+	-diff $^ > $@
+.PRECIOUS: test.%.y.diff
+test.%.y.diff: test.%.ref.out test.%.y.out
+	-diff $^ > $@
+
+.PRECIOUS: test.%.out
+test.%.out: test.%
+	-./$< > $@
+
+.PRECIOUS: test.%.ref
+test.%.ref: test.%.c
+	$(CC) $(CFLAGS) $(CC_CFLAGS) -o $@ $^
+.PRECIOUS: test.%.x
+test.%.x: test.%.c
+	$(X_COMPILER) $(CFLAGS) $(X_CFLAGS) -o $@ $^
+.PRECIOUS: test.%.y
+test.%.y: test.%.c
+	$(Y_COMPILER) $(CFLAGS) $(Y_CFLAGS) -o $@ $^
+
+.PRECIOUS: test.%.c
+test.%.c: $(ABITESTGEN)
+	$(ABITESTGEN) $(TESTARGS) -o $@ --min=$(shell expr $* '*' $(COUNT))  --count=$(COUNT)
+
+clean:	
+	rm -f test.* *~
diff --git a/clang/utils/ABITest/return-types-32/Makefile b/clang/utils/ABITest/return-types-32/Makefile
new file mode 100644
index 0000000..df1c53f
--- /dev/null
+++ b/clang/utils/ABITest/return-types-32/Makefile
@@ -0,0 +1,7 @@
+X_CFLAGS := -m32
+Y_CFLAGS := -m32
+CC_CFLAGS := -m32
+
+include ../Makefile.test.common
+
+TESTARGS += --max-args 0
diff --git a/clang/utils/ABITest/return-types-64/Makefile b/clang/utils/ABITest/return-types-64/Makefile
new file mode 100644
index 0000000..9616e45
--- /dev/null
+++ b/clang/utils/ABITest/return-types-64/Makefile
@@ -0,0 +1,7 @@
+X_CFLAGS := -m64
+Y_CFLAGS := -m64
+CC_CFLAGS := -m64
+
+include ../Makefile.test.common
+
+TESTARGS += --max-args 0
diff --git a/clang/utils/ABITest/single-args-32/Makefile b/clang/utils/ABITest/single-args-32/Makefile
new file mode 100644
index 0000000..9ff417f
--- /dev/null
+++ b/clang/utils/ABITest/single-args-32/Makefile
@@ -0,0 +1,7 @@
+X_CFLAGS := -m32
+Y_CFLAGS := -m32
+CC_CFLAGS := -m32
+
+include ../Makefile.test.common
+
+TESTARGS += --no-function-return --max-args 1
diff --git a/clang/utils/ABITest/single-args-64/Makefile b/clang/utils/ABITest/single-args-64/Makefile
new file mode 100644
index 0000000..b8acb70
--- /dev/null
+++ b/clang/utils/ABITest/single-args-64/Makefile
@@ -0,0 +1,13 @@
+# Usage: make test.N.report 
+#
+# COUNT can be over-ridden to change the number of tests generated per
+# file, and TESTARGS is used to change the type generation. Make sure
+# to 'make clean' after changing either of these parameters.
+
+X_CFLAGS := -m64
+Y_CFLAGS := -m64
+CC_CFLAGS := -m64
+
+include ../Makefile.test.common
+
+TESTARGS += --no-function-return --max-args 1
diff --git a/clang/utils/ABITest/summarize.sh b/clang/utils/ABITest/summarize.sh
new file mode 100755
index 0000000..3efb52b
--- /dev/null
+++ b/clang/utils/ABITest/summarize.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+set -eu
+
+if [ $# != 1 ]; then
+    echo "usage: $0 <num-tests>"
+    exit 1
+fi
+
+for i in $(seq 0 $1); do 
+    if (! make test.$i.report &> /dev/null); then 
+        echo "FAIL: $i";
+    fi; 
+done
+