gcc/testsuite/gcc.target/powerpc/prefix-no-update.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target powerpc_prefixed_addr } */
   3 /* { dg-require-effective-target lp64 } */
   4 /* { dg-options "-O2 -mdejagnu-cpu=power10" } */
   5
   6 /* Make sure that we don't generate a prefixed form of the load and store with
   7    update instructions (i.e. instead of generating LWZU we have to generate
   8    PLWZ plus a PADDI).  */
   9
  10 #ifndef SIZE
  11 #define SIZE 50000
  12 #endif
  13
  14 struct foo {
  15   unsigned int field;
  16   char pad[SIZE];
  17 };
  18
  19 struct foo *inc_load (struct foo *p, unsigned int *q)
  20 {
  21   *q = (++p)->field;    /* PLWZ, PADDI, STW.  */
  22   return p;
  23 }
  24
  25 struct foo *dec_load (struct foo *p, unsigned int *q)
  26 {
  27   *q = (--p)->field;    /* PLWZ, PADDI, STW.  */
  28   return p;
  29 }
  30
  31 struct foo *inc_store (struct foo *p, unsigned int *q)
  32 {
  33   (++p)->field = *q;    /* LWZ, PADDI, PSTW.  */
  34   return p;
  35 }
  36
  37 struct foo *dec_store (struct foo *p, unsigned int *q)
  38 {
  39   (--p)->field = *q;    /* LWZ, PADDI, PSTW.  */
  40   return p;
  41 }
  42
  43 /* { dg-final { scan-assembler-times {\mlwz\M}    2 } } */
  44 /* { dg-final { scan-assembler-times {\mstw\M}    2 } } */
  45 /* { dg-final { scan-assembler-times {\mpaddi\M}  4 } } */
  46 /* { dg-final { scan-assembler-times {\mplwz\M}   2 } } */
  47 /* { dg-final { scan-assembler-times {\mpstw\M}   2 } } */
  48 /* { dg-final { scan-assembler-not   {\mplwzu\M}    } } */
  49 /* { dg-final { scan-assembler-not   {\mpstwu\M}    } } */
  50 /* { dg-final { scan-assembler-not   {\maddis\M}    } } */
  51 /* { dg-final { scan-assembler-not   {\maddi\M}     } } */