gcc/testsuite/gcc.target/i386/align-main-1.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\[lq\]?\[\\t \]*\\$-128,\[\\t \]*%\[re\]?sp" } } */
   6 /* { dg-final { scan-assembler-not "and\[lq\]?\[\\t \]*\\$-64,\[\\t \]*%\[re\]?sp" } } */
   7 /* { dg-skip-if "Options about stack-boundary aren't support" { x86_64-*-mingw* } } */
   8
   9 #include <stddef.h>
  10
  11 #define ALIGNMENT 128
  12
  13 typedef int aligned __attribute__((aligned(ALIGNMENT)));
  14 extern void abort(void);
  15
  16 __attribute__ ((noinline))
  17 void check(void * a)
  18 {
  19   if (((ptrdiff_t)a & (ALIGNMENT-1)) != 0)
  20     abort();
  21 }
  22
  23 int main()
  24 {
  25   aligned a = 1;
  26   check(&a);
  27   return 0;
  28 }