clang/test/CodeGen/inline-builtin-asm-name.c

   1 // RUN: %clang_cc1 -triple i686-windows-gnu -emit-llvm -o - %s -disable-llvm-optzns | FileCheck %s
   2
   3 // CHECK: call i32 @"\01_asm_func_name.inline"
   4
   5 // CHECK: declare dso_local i32 @"\01_asm_func_name"(ptr noundef, i32 noundef, ptr noundef, ptr noundef)
   6
   7 // CHECK: define internal i32 @"\01_asm_func_name.inline"
   8
   9 // CHECK: call i32 @__mingw_vsnprintf
  10
  11 // CHECK: declare dso_local i32 @__mingw_vsnprintf
  12
  13 typedef unsigned int size_t;
  14
  15 int __mingw_vsnprintf(char *_DstBuf, size_t _MaxCount, const char *_Format, __builtin_va_list _ArgList);
  16
  17 // For the real use case, "_asm_func_name" is actually "___mingw_vsnprintf", but it's renamed in the testcase for disambiguation.
  18 int vsnprintf(char *__stream, size_t __n, const char *__format, __builtin_va_list __local_argv) __asm__("_asm_func_name");
  19
  20 extern __inline__ __attribute__((__always_inline__, __gnu_inline__))
  21 int vsnprintf(char *__stream, size_t __n, const char *__format, __builtin_va_list __local_argv)
  22 {
  23   return __mingw_vsnprintf(__stream, __n, __format, __local_argv);
  24 }
  25
  26 void call(const char* fmt, ...) {
  27   char buf[200];
  28   __builtin_va_list ap;
  29   __builtin_va_start(ap, fmt);
  30   vsnprintf(buf, sizeof(buf), fmt, ap);
  31   __builtin_va_end(ap);
  32 }