gcc/testsuite/gcc.target/sh/pr52483-1.c

   1 /* Check that loads/stores from/to volatile mems don't result in redundant
   2    sign/zero extensions.  */
   3 /* { dg-do compile }  */
   4 /* { dg-options "-O2" } */
   5 /* { dg-final { scan-assembler-not "exts|extu" } } */
   6
   7 int
   8 test_00 (volatile char* x)
   9 {
  10   return *x;
  11 }
  12
  13 void
  14 test_100 (volatile char* x, char y)
  15 {
  16   *x = y;
  17 }
  18
  19 int
  20 test_01 (volatile short* x)
  21 {
  22   return *x;
  23 }
  24
  25 void
  26 test_101 (volatile unsigned char* x, unsigned char y)
  27 {
  28   *x = y;
  29 }
  30
  31 int
  32 test_02 (volatile unsigned char* x)
  33 {
  34   return *x == 0x80;
  35 }
  36
  37 void
  38 test_102 (volatile short* x, short y)
  39 {
  40   *x = y;
  41 }
  42
  43 int
  44 test_03 (volatile unsigned short* x)
  45 {
  46   return *x == 0xFF80;
  47 }
  48
  49 void
  50 test_103 (volatile unsigned short* x, unsigned short y)
  51 {
  52   *x = y;
  53 }