gcc/testsuite/gcc.target/i386/pr15184-1.c

   1 /* PR 15184 first two tests, plus two addition ones.  */
   2 /* { dg-do compile { target ia32 } } */
   3 /* { dg-options "-O2 -march=pentiumpro" } */
   4
   5 #define regparm __attribute__((__regparm__(1)))
   6
   7 extern unsigned int x;
   8
   9 void regparm f0(unsigned char c)
  10 {
  11        x = (x & 0xFFFFFF00) | (unsigned int)c;
  12 }
  13
  14 void regparm f1(unsigned char c)
  15 {
  16      x = (x & 0xFFFF00FF) | ((unsigned int)c << 8);
  17 }
  18
  19 void regparm f2(unsigned char c)
  20 {
  21      x = (x & 0xFF00FFFF) | ((unsigned int)c << 16);
  22 }
  23 void regparm f3(unsigned char c)
  24 {
  25      x = (x & 0x00FFFFFF) | ((unsigned int)c << 24);
  26 }
  27
  28
  29 /* Each function should compile down to a byte move from
  30    the input register into x, possibly at an offset within x.  */
  31 /* { dg-final { scan-assembler-times "movb\[ \\t\]+%al" 4 } } */
  32