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-*-* rs6000-*-* alpha*-*-* x86_64-*-* } || { powerpc*-*-* && ilp32 } } } } */
   4 /* { dg-require-effective-target fpic } */
   5 /* { dg-options "-O2 -fpic -fno-omit-frame-pointer -fno-asynchronous-unwind-tables" } */
   6 /* { dg-final { scan-assembler-not "LC\[0-9\]" } } */
   7
   8 /* Clobber all call-saved registers that can hold a pointer value.  */
   9 #if defined(__i386__)
  10 #define clobber \
  11   asm volatile("#asm" : : : "si", "di")
  12 #elif defined(__powerpc__) || defined(__PPC__) || defined(__ppc__) || defined(__POWERPC__) || defined(PPC) || defined (_IBMR2) || defined (__ppc)
  13 #define clobber \
  14   asm volatile("#asm" : : : "14", "15", "16", "17", "18", "19", "20", \
  15                "21", "22", "23", "24", "25", "26", "27", "28", "29")
  16 #elif defined(__alpha__)
  17 #define clobber \
  18   asm volatile("#asm" : : : "$9", "$10", "$11", "$12", "$13", "$14", \
  19                "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", "$f8", "$f9")
  20 #elif defined(__x86_64__)
  21 #define clobber \
  22   asm volatile("#asm" : : : "rcx", "rdx", "rsi", "rdi", "r8", "r9", "r10", "r11")
  23 #else
  24 #error no clobber macro defined
  25 #endif
  26
  27 extern void f1(int, int, int);
  28 extern void f2(int*, int*, int*);
  29
  30 extern int ext;
  31 static int loc_small;
  32 static int loc_big[100];
  33
  34 void bar(void)
  35 {
  36   f1(ext, loc_small, loc_big[0]);
  37   clobber;
  38   f2(&ext, &loc_small, &loc_big[0]);
  39 }