gcc/testsuite/gcc.target/sh/attr-isr-nosave_low_regs.c

   1 /* A call will clobber all call-saved registers.
   2    If #pragma nosave_low_regs is specified, do not save/restore r0..r7.
   3    (On SH3* and SH4* r0..r7 are banked)
   4    Call-saved registers r8..r13 also don't need to be restored.
   5    To test that we look for register push insns such as 'mov.l r0,@-r15'.  */
   6 /* { dg-do compile { target { { banked_r0r7_isr } && nonpic } } }  */
   7 /* { dg-options "-O" }  */
   8 /* { dg-final { scan-assembler-times "rte" 1 } }  */
   9 /* { dg-final { scan-assembler-not "mov.l\tr\[0-9\],@-r15" } }  */
  10 /* { dg-final { scan-assembler-not "mov.l\tr1\[0-4\],@-r15" } }  */
  11 /* { dg-final { scan-assembler-times "macl" 2 } }  */
  12
  13 extern void bar (void);
  14
  15 void
  16 foo (void)
  17 {
  18 }
  19
  20 #pragma interrupt
  21 void
  22 ( __attribute__ ((nosave_low_regs)) isr) (void)
  23 {
  24   bar ();
  25 }
  26
  27 void
  28 delay (int a)
  29 {
  30 }