gcc/testsuite/gcc.target/powerpc/outofline_rnreg.c

   1 /* Test that registers used by out of line restore functions does not get renamed.
   2    AIX, and 64 bit targets uses r1, which rnreg stays away from.
   3    Linux 32 bits targets uses r11, which is susceptible to be renamed */
   4 /* { dg-do compile } */
   5 /* { dg-require-effective-target ilp32 } */
   6 /* { dg-options "-Os -frename-registers -fdump-rtl-rnreg" } */
   7 /* "* renamed" or "* no available better choice" results are not acceptable */
   8 /* { dg-final { scan-rtl-dump-not "Register 11 in insn *" "rnreg" { target powerpc*-*-linux* } } } */
   9 int
  10 calc (int j)
  11 {
  12   if (j<=1) return 1;
  13   return calc(j-1)*(j+1);
  14 }