diff options
Diffstat (limited to 'clang/test/CodeGenCXX/new-overflow.cpp')
| -rw-r--r-- | clang/test/CodeGenCXX/new-overflow.cpp | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/new-overflow.cpp b/clang/test/CodeGenCXX/new-overflow.cpp new file mode 100644 index 0000000..68f89c3 --- /dev/null +++ b/clang/test/CodeGenCXX/new-overflow.cpp @@ -0,0 +1,209 @@ +// RUN: %clang_cc1 -triple i386-unknown-unknown %s -emit-llvm -o - | FileCheck %s + +// rdar://problem/9246208 + +// Basic test. +namespace test0 { + struct A { + A(); + int x; + }; + + typedef A elt; + + // CHECK: define [[A:%.*]]* @_ZN5test04testEs(i16 signext + // CHECK: [[N:%.*]] = sext i16 {{%.*}} to i32 + // CHECK-NEXT: [[T0:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[N]], i32 4) + // CHECK-NEXT: [[T1:%.*]] = extractvalue { i32, i1 } [[T0]], 1 + // CHECK-NEXT: [[T2:%.*]] = extractvalue { i32, i1 } [[T0]], 0 + // CHECK-NEXT: [[T3:%.*]] = select i1 [[T1]], i32 -1, i32 [[T2]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T3]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[N]] + elt *test(short s) { + return new elt[s]; + } +} + +// test0 with a nested array. +namespace test1 { + struct A { + A(); + int x; + }; + + typedef A elt[100]; + + // CHECK: define [100 x [[A:%.*]]]* @_ZN5test14testEs(i16 signext + // CHECK: [[N:%.*]] = sext i16 {{%.*}} to i32 + // CHECK-NEXT: [[T0:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[N]], i32 400) + // CHECK-NEXT: [[T1:%.*]] = extractvalue { i32, i1 } [[T0]], 1 + // CHECK-NEXT: [[T2:%.*]] = extractvalue { i32, i1 } [[T0]], 0 + // CHECK-NEXT: [[T3:%.*]] = mul i32 [[N]], 100 + // CHECK-NEXT: [[T4:%.*]] = select i1 [[T1]], i32 -1, i32 [[T2]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T4]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[T3]] + elt *test(short s) { + return new elt[s]; + } +} + +// test1 with an array cookie. +namespace test2 { + struct A { + A(); + ~A(); + int x; + }; + + typedef A elt[100]; + + // CHECK: define [100 x [[A:%.*]]]* @_ZN5test24testEs(i16 signext + // CHECK: [[N:%.*]] = sext i16 {{%.*}} to i32 + // CHECK-NEXT: [[T0:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[N]], i32 400) + // CHECK-NEXT: [[T1:%.*]] = extractvalue { i32, i1 } [[T0]], 1 + // CHECK-NEXT: [[T2:%.*]] = extractvalue { i32, i1 } [[T0]], 0 + // CHECK-NEXT: [[T3:%.*]] = mul i32 [[N]], 100 + // CHECK-NEXT: [[T4:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[T2]], i32 4) + // CHECK-NEXT: [[T5:%.*]] = extractvalue { i32, i1 } [[T4]], 1 + // CHECK-NEXT: [[T6:%.*]] = or i1 [[T1]], [[T5]] + // CHECK-NEXT: [[T7:%.*]] = extractvalue { i32, i1 } [[T4]], 0 + // CHECK-NEXT: [[T8:%.*]] = select i1 [[T6]], i32 -1, i32 [[T7]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T8]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[T3]] + elt *test(short s) { + return new elt[s]; + } +} + +// test0 with a 1-byte element. +namespace test4 { + struct A { + A(); + }; + + typedef A elt; + + // CHECK: define [[A:%.*]]* @_ZN5test44testEs(i16 signext + // CHECK: [[N:%.*]] = sext i16 {{%.*}} to i32 + // CHECK-NEXT: [[T0:%.*]] = icmp slt i32 [[N]], 0 + // CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], i32 -1, i32 [[N]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T1]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[N]] + elt *test(short s) { + return new elt[s]; + } +} + +// test4 with no sext required. +namespace test5 { + struct A { + A(); + }; + + typedef A elt; + + // CHECK: define [[A:%.*]]* @_ZN5test54testEi(i32 + // CHECK: [[N:%.*]] = load i32* + // CHECK-NEXT: [[T0:%.*]] = icmp slt i32 [[N]], 0 + // CHECK-NEXT: [[T1:%.*]] = select i1 [[T0]], i32 -1, i32 [[N]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T1]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[N]] + elt *test(int s) { + return new elt[s]; + } +} + +// test0 with an unsigned size. +namespace test6 { + struct A { + A(); + int x; + }; + + typedef A elt; + + // CHECK: define [[A:%.*]]* @_ZN5test64testEt(i16 zeroext + // CHECK: [[N:%.*]] = zext i16 {{%.*}} to i32 + // CHECK-NEXT: [[T0:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[N]], i32 4) + // CHECK-NEXT: [[T1:%.*]] = extractvalue { i32, i1 } [[T0]], 1 + // CHECK-NEXT: [[T2:%.*]] = extractvalue { i32, i1 } [[T0]], 0 + // CHECK-NEXT: [[T3:%.*]] = select i1 [[T1]], i32 -1, i32 [[T2]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T3]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[N]] + elt *test(unsigned short s) { + return new elt[s]; + } +} + +// test1 with an unsigned size. +namespace test7 { + struct A { + A(); + int x; + }; + + typedef A elt[100]; + + // CHECK: define [100 x [[A:%.*]]]* @_ZN5test74testEt(i16 zeroext + // CHECK: [[N:%.*]] = zext i16 {{%.*}} to i32 + // CHECK-NEXT: [[T0:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[N]], i32 400) + // CHECK-NEXT: [[T1:%.*]] = extractvalue { i32, i1 } [[T0]], 1 + // CHECK-NEXT: [[T2:%.*]] = extractvalue { i32, i1 } [[T0]], 0 + // CHECK-NEXT: [[T3:%.*]] = mul i32 [[N]], 100 + // CHECK-NEXT: [[T4:%.*]] = select i1 [[T1]], i32 -1, i32 [[T2]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T4]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[T3]] + elt *test(unsigned short s) { + return new elt[s]; + } +} + +// test0 with a signed type larger than size_t. +namespace test8 { + struct A { + A(); + int x; + }; + + typedef A elt; + + // CHECK: define [[A:%.*]]* @_ZN5test84testEx(i64 + // CHECK: [[N:%.*]] = load i64* + // CHECK-NEXT: [[T0:%.*]] = icmp uge i64 [[N]], 4294967296 + // CHECK-NEXT: [[T1:%.*]] = trunc i64 [[N]] to i32 + // CHECK-NEXT: [[T2:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[T1]], i32 4) + // CHECK-NEXT: [[T3:%.*]] = extractvalue { i32, i1 } [[T2]], 1 + // CHECK-NEXT: [[T4:%.*]] = or i1 [[T0]], [[T3]] + // CHECK-NEXT: [[T5:%.*]] = extractvalue { i32, i1 } [[T2]], 0 + // CHECK-NEXT: [[T6:%.*]] = select i1 [[T4]], i32 -1, i32 [[T5]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T6]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[T1]] + elt *test(long long s) { + return new elt[s]; + } +} + +// test8 with an unsigned type. +namespace test9 { + struct A { + A(); + int x; + }; + + typedef A elt; + + // CHECK: define [[A:%.*]]* @_ZN5test94testEy(i64 + // CHECK: [[N:%.*]] = load i64* + // CHECK-NEXT: [[T0:%.*]] = icmp uge i64 [[N]], 4294967296 + // CHECK-NEXT: [[T1:%.*]] = trunc i64 [[N]] to i32 + // CHECK-NEXT: [[T2:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[T1]], i32 4) + // CHECK-NEXT: [[T3:%.*]] = extractvalue { i32, i1 } [[T2]], 1 + // CHECK-NEXT: [[T4:%.*]] = or i1 [[T0]], [[T3]] + // CHECK-NEXT: [[T5:%.*]] = extractvalue { i32, i1 } [[T2]], 0 + // CHECK-NEXT: [[T6:%.*]] = select i1 [[T4]], i32 -1, i32 [[T5]] + // CHECK-NEXT: call noalias i8* @_Znaj(i32 [[T6]]) + // CHECK: getelementptr inbounds {{.*}}, i32 [[T1]] + elt *test(unsigned long long s) { + return new elt[s]; + } +} |