Viewing file:  split-7.c (1.16 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-require-effective-target split_stack } */
/* { dg-options "-fsplit-stack -O2" } */
/* { dg-options "-fsplit-stack -O2 -mno-accumulate-outgoing-args" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
/* A case that used to fail on 32-bit x86 when optimizing and not
using -maccumulate-args. The stack adjustment of the alloca got
mixed up with the arguments pushed on the stack to the function
before the call of alloca. */
#include <stdlib.h>
typedef struct { const char* s; int l; } s;
typedef unsigned long long align16 __attribute__ ((aligned(16)));
s gobats (const void *, int) __attribute__ ((noinline));
s
gobats (const void* p __attribute__ ((unused)),
int l __attribute__ ((unused)))
{
s v;
v.s = 0;
v.l = 0;
return v;
}
void check_aligned (void *p) __attribute__ ((noinline));
void
check_aligned (void *p)
{
if (((__SIZE_TYPE__) p & 0xf) != 0)
abort ();
}
void gap (void *) __attribute__ ((noinline));
void gap (void *p)
{
align16 a;
check_aligned (&a);
}
int
main (int argc, char **argv)
{
s *space;
gobats(0, 16);
space = (s *) alloca(sizeof(s) + 1);
*space = (s){0, 16};
gap(space);
return 0;
}
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