From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.dg/tree-ssa/pr22026.c | 49 +++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/pr22026.c (limited to 'gcc/testsuite/gcc.dg/tree-ssa/pr22026.c') diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr22026.c b/gcc/testsuite/gcc.dg/tree-ssa/pr22026.c new file mode 100644 index 000000000..7e6914d9d --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr22026.c @@ -0,0 +1,49 @@ +/* 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" } } */ +/* { dg-final { cleanup-tree-dump "vrp1" } } */ -- cgit v1.2.3