gcc/testsuite/gcc.target/i386/align-main-2.c

   1 /* Test for stack alignment when PREFERRED_STACK_BOUNDARY > alignment
   2    of local variable.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-O2 -mpreferred-stack-boundary=6 -mincoming-stack-boundary=6" } */
   5 /* { dg-final { scan-assembler "and\[lq\]?\[\\t \]*\\$-64,\[\\t \]*%\[re\]?sp" } } */
   6 /* { dg-final { scan-assembler-not "and\[lq\]?\[\\t \]*\\$-128,\[\\t \]*%\[re\]?sp" } } */
   7 /* { dg-skip-if "Options about stack-boundary aren't support" { x86_64-*-mingw* } } */
   8 #include <stddef.h>
   9
  10 #define ALIGNMENT 32
  11 typedef int aligned __attribute__((aligned(ALIGNMENT)));
  12 extern void abort(void);
  13
  14 __attribute__ ((noinline))
  15 void check(void * a)
  16 {
  17   if (((ptrdiff_t)a & (ALIGNMENT-1)) != 0)
  18     abort();
  19 }
  20
  21 int main()
  22 {
  23   aligned a = 1;
  24   check(&a);
  25   return 0;
  26 }