gcc/testsuite/gcc.dg/fold-negate-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 #define SHIFT ((8*__SIZEOF_INT__)-1)
   5
   6 int test_rshift_1(int x)
   7 {
   8   int t = x >> SHIFT;
   9   return -t;
  10 }
  11
  12 int test_rshift_2(int x)
  13 {
  14   unsigned int t = (unsigned int)x >> SHIFT;
  15   return -t;
  16 }
  17
  18 int test_rshift_3(int x)
  19 {
  20   int t = (unsigned int)x >> SHIFT;
  21   return -t;
  22 }
  23
  24 int test_rshift_4(int x)
  25 {
  26   unsigned int t = x >> SHIFT;
  27   return -t;
  28 }
  29
  30 double test_mul_1(double x)
  31 {
  32   double t = -5.0 * x;
  33   return -t;
  34 }
  35
  36 double test_mul_2(double x, double y)
  37 {
  38   double t1 = -x;
  39   double t2 = t1 * y;
  40   return -t2;
  41 }
  42
  43 double test_rdiv_1(double x, double y)
  44 {
  45   double t1 = -x;
  46   double t2 = t1 / y;
  47   return -t2;
  48 }
  49
  50 double test_rdiv_2(double x, double y)
  51 {
  52   double t1 = -y;
  53   double t2 = x / t1;
  54   return -t2;
  55 }
  56
  57 /* { dg-final { scan-tree-dump-not " -" "optimized" } } */
  58