gcc-4.9/gcc/testsuite/gcc.dg/pr43157.c


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/* { dg-do link } */
/* { dg-require-effective-target lto } */
/* { dg-require-linker-plugin "" } */
/* { dg-options "-O1 -flto -fuse-linker-plugin" } */

#define LABEL3(pfx, x) # pfx x
#define LABEL2(pfx, x) LABEL3(pfx, x)
#define LABEL(x) LABEL2(__USER_LABEL_PREFIX__, x)

unsigned int factorial_ (unsigned int) __asm__ (LABEL ("factorial"));

unsigned int factorial (unsigned int i)
{
  return i > 1 ? i * factorial_ (i - 1) : 1;
}

int main (void)
{
  return factorial (5);
}