gcc/testsuite/gcc.dg/20020103-1.c

   1 /* Verify that constant equivalences get reloaded properly, either by being
   2    spilled to the stack, or regenerated, but not dropped to memory.  */
   3 /* { dg-do compile { target i?86-*-* powerpc-*-* rs6000-*-* alpha*-*-* x86_64-*-*} } */
   4 /* { dg-options "-O2 -fpic -fno-omit-frame-pointer -fno-asynchronous-unwind-tables" } */
   5 /* { dg-final { scan-assembler-not "LC" } } */
   6
   7 /* Clobber all call-saved registers that can hold a pointer value.  */
   8 #if defined(__i386__)
   9 #define clobber \
  10   asm volatile("#asm" : : : "si", "di")
  11 #elif defined(__powerpc__) || defined(__PPC__) || defined(__ppc__) || defined(__POWERPC__) || defined(PPC) || defined (_IBMR2)
  12 #define clobber \
  13   asm volatile("#asm" : : : "14", "15", "16", "17", "18", "19", "20", \
  14                "21", "22", "23", "24", "25", "26", "27", "28", "29")
  15 #elif defined(__alpha__)
  16 #define clobber \
  17   asm volatile("#asm" : : : "$9", "$10", "$11", "$12", "$13", "$14", \
  18                "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", "$f9")
  19 #elif defined(__x86_64__)
  20 #define clobber \
  21   asm volatile("#asm" : : : "rcx", "rdx", "rsi", "rdi", "r8", "r9", "r10", "r11")
  22 #else
  23 #error no clobber macro defined
  24 #endif
  25
  26 extern void f1(int, int, int);
  27 extern void f2(int*, int*, int*);
  28
  29 extern int ext;
  30 static int loc_small;
  31 static int loc_big[100];
  32
  33 void bar(void)
  34 {
  35   f1(ext, loc_small, loc_big[0]);
  36   clobber;
  37   f2(&ext, &loc_small, &loc_big[0]);
  38 }