File: minus-ovf.c

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gcc-arm-none-eabi 15%3A7-2018-q2-5
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/* { dg-do compile } */
/* { dg-options "-O -fdump-tree-optimized" } */

int f(unsigned a, unsigned b) {
  unsigned remove = a - b;
  return remove > a;
}

int g(unsigned a, unsigned b) {
  unsigned remove = a - b;
  return remove <= a;
}

int h(unsigned a, unsigned b) {
  unsigned remove = a - b;
  return a < remove;
}

int i(unsigned a, unsigned b) {
  unsigned remove = a - b;
  return a >= remove;
}

/* { dg-final { scan-tree-dump-not "remove" "optimized" } } */