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Diffstat (limited to 'gcc/testsuite/gcc.dg/asm-b.c')
-rw-r--r-- | gcc/testsuite/gcc.dg/asm-b.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/asm-b.c b/gcc/testsuite/gcc.dg/asm-b.c new file mode 100644 index 00000000000..ce68cabe300 --- /dev/null +++ b/gcc/testsuite/gcc.dg/asm-b.c @@ -0,0 +1,39 @@ +/* { dg-do run { target powerpc-*-* i?386-*-* x86_64-*-* } } */ +/* { dg-options "-O1" } */ +/* Test to make sure that inline-asm causes the tree optimizators get the + V_MAY_DEFs and clober memory. */ +/* Test from Jakub Jelinek, modified by Andrew Pinski to work on all powerpc targets. */ +extern void abort (void); + +unsigned short v = 0x0300; + +void +foo (unsigned short *p) +{ + *p = v; +} + +int +bar (void) +{ + unsigned short x; + volatile unsigned short *z; + foo (&x); + const unsigned int y = x; + z = &x; +#if defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) || defined (_POWER) + __asm __volatile ("sthbrx %1,0,%2" : "=m" (*z) : "r" (y), "r" (z)); +#elif defined __i386__ || defined __x86_64__ + __asm __volatile ("movb %b1,1(%2); movb %h1,(%2)" : "=m" (*z) : "r" (y), "r" +(z)); +#endif + return (x & 1) == 0; +} + +int +main (void) +{ + if (bar ()) + abort (); + return 0; +} |