Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/tree-ssa/pr22026.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* PR tree-optimization/22026 VRP used think that ~[0,0] + ~[0,0] = ~[0,0], which is wrong. The same applies to subtraction and unsigned multiplication. */ /* { dg-do compile } */ /* { dg-options "-O2 -fdump-tree-vrp1" } */ int plus (int x, int y) { if (x != 0) if (y != 0) { int z = x + y; if (z != 0) return 1; } return 0; } int minus (int x, int y) { if (x != 0) if (y != 0) { int z = x - y; if (z != 0) return 1; } return 0; } int mult (unsigned x, unsigned y) { if (x != 0) if (y != 0) { unsigned z = x * y; if (z != 0) return 1; } return 0; } /* None of the predicates can be folded in these functions. */ /* { dg-final { scan-tree-dump-times "Folding predicate" 0 "vrp1" } } */