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

1 files changed, 164 insertions, 0 deletions

diff --git a/clang/test/Sema/builtins.c b/clang/test/Sema/builtins.c
new file mode 100644
index 0000000..b8b0367
--- /dev/null
+++ b/clang/test/Sema/builtins.c
@@ -0,0 +1,164 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -Wno-string-plus-int -triple=i686-apple-darwin9
+// This test needs to set the target because it uses __builtin_ia32_vec_ext_v4si
+
+int test1(float a, int b) {
+  return __builtin_isless(a, b);
+}
+int test2(int a, int b) {
+  return __builtin_islessequal(a, b);  // expected-error {{floating point type}}
+}
+
+int test3(double a, float b) {
+  return __builtin_isless(a, b);
+}
+int test4(int* a, double b) {
+  return __builtin_islessequal(a, b);  // expected-error {{floating point type}}
+}
+
+int test5(float a, long double b) {
+  return __builtin_isless(a, b, b);  // expected-error {{too many arguments}}
+}
+int test6(float a, long double b) {
+  return __builtin_islessequal(a);  // expected-error {{too few arguments}}
+}
+
+
+#define CFSTR __builtin___CFStringMakeConstantString
+void test7() {
+  const void *X;
+  X = CFSTR("\242"); // expected-warning {{input conversion stopped}}
+  X = CFSTR("\0"); // no-warning
+  X = CFSTR(242); // expected-error {{CFString literal is not a string constant}} expected-warning {{incompatible integer to pointer conversion}}
+  X = CFSTR("foo", "bar"); // expected-error {{too many arguments to function call}}
+}
+
+
+// atomics.
+
+void test9(short v) {
+  unsigned i, old;
+
+  old = __sync_fetch_and_add();  // expected-error {{too few arguments to function call}}
+  old = __sync_fetch_and_add(&old);  // expected-error {{too few arguments to function call}}
+  old = __sync_fetch_and_add((unsigned*)0, 42i); // expected-warning {{imaginary constants are an extension}}
+
+  // PR7600: Pointers are implicitly casted to integers and back.
+  void *old_ptr = __sync_val_compare_and_swap((void**)0, 0, 0);
+
+  // Ensure the return type is correct even when implicit casts are stripped
+  // away. This triggers an assertion while checking the comparison otherwise.
+  if (__sync_fetch_and_add(&old, 1) == 1) {
+  }
+}
+
+
+// rdar://7236819
+void test10(void) __attribute__((noreturn));
+
+void test10(void) {
+  __asm__("int3");
+  __builtin_unreachable();
+
+  // No warning about falling off the end of a noreturn function.
+}
+
+void test11(int X) {
+  switch (X) {
+  case __builtin_eh_return_data_regno(0):  // constant foldable.
+    break;
+  }
+
+  __builtin_eh_return_data_regno(X);  // expected-error {{argument to '__builtin_eh_return_data_regno' must be a constant integer}}
+}
+
+// PR5062
+void test12(void) __attribute__((__noreturn__));
+void test12(void) {
+  __builtin_trap();  // no warning because trap is noreturn.
+}
+
+void test_unknown_builtin(int a, int b) {
+  __builtin_isles(a, b); // expected-error{{use of unknown builtin}} \
+                         // expected-note{{did you mean '__builtin_isless'?}}
+}
+
+int test13() {
+  __builtin_eh_return(0, 0); // no warning, eh_return never returns.
+}
+
+// <rdar://problem/8228293>
+void test14() {
+  int old;
+  old = __sync_fetch_and_min((volatile int *)&old, 1);
+}
+
+// <rdar://problem/8336581>
+void test15(const char *s) {
+  __builtin_printf("string is %s\n", s);
+}
+
+// PR7885
+int test16() {
+  return __builtin_constant_p() + // expected-error{{too few arguments}}
+         __builtin_constant_p(1, 2); // expected-error {{too many arguments}}
+}
+
+const int test17_n = 0;
+const char test17_c[] = {1, 2, 3, 0};
+const char test17_d[] = {1, 2, 3, 4};
+typedef int __attribute__((vector_size(16))) IntVector;
+struct Aggregate { int n; char c; };
+enum Enum { EnumValue1, EnumValue2 };
+
+typedef __typeof(sizeof(int)) size_t;
+size_t strlen(const char *);
+
+void test17() {
+#define ASSERT(...) { int arr[(__VA_ARGS__) ? 1 : -1]; }
+#define T(...) ASSERT(__builtin_constant_p(__VA_ARGS__))
+#define F(...) ASSERT(!__builtin_constant_p(__VA_ARGS__))
+
+  // __builtin_constant_p returns 1 if the argument folds to:
+  //  - an arithmetic constant with value which is known at compile time
+  T(test17_n);
+  T(&test17_c[3] - test17_c);
+  T(3i + 5); // expected-warning {{imaginary constant}}
+  T(4.2 * 7.6);
+  T(EnumValue1);
+  T((enum Enum)(int)EnumValue2);
+
+  //  - the address of the first character of a string literal, losslessly cast
+  //    to any type
+  T("string literal");
+  T((double*)"string literal");
+  T("string literal" + 0);
+  T((long)"string literal");
+
+  // ... and otherwise returns 0.
+  F("string literal" + 1);
+  F(&test17_n);
+  F(test17_c);
+  F(&test17_c);
+  F(&test17_d);
+  F((struct Aggregate){0, 1});
+  F((IntVector){0, 1, 2, 3});
+
+  // Ensure that a technique used in glibc is handled correctly.
+#define OPT(...) (__builtin_constant_p(__VA_ARGS__) && strlen(__VA_ARGS__) < 4)
+  // FIXME: These are incorrectly treated as ICEs because strlen is treated as
+  // a builtin.
+  ASSERT(OPT("abc"));
+  ASSERT(!OPT("abcd"));
+  // In these cases, the strlen is non-constant, but the __builtin_constant_p
+  // is 0: the array size is not an ICE but is foldable.
+  ASSERT(!OPT(test17_c));        // expected-warning {{folded}}
+  ASSERT(!OPT(&test17_c[0]));    // expected-warning {{folded}}
+  ASSERT(!OPT((char*)test17_c)); // expected-warning {{folded}}
+  ASSERT(!OPT(test17_d));        // expected-warning {{folded}}
+  ASSERT(!OPT(&test17_d[0]));    // expected-warning {{folded}}
+  ASSERT(!OPT((char*)test17_d)); // expected-warning {{folded}}
+
+#undef OPT
+#undef T
+#undef F
+}