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re PR middle-end/61725 (__builtin_ffs(0) leads to wrong code generation)
authorJakub Jelinek <jakub@redhat.com>
Tue, 8 Jul 2014 09:39:57 +0000 (11:39 +0200)
committerJakub Jelinek <jakub@gcc.gnu.org>
Tue, 8 Jul 2014 09:39:57 +0000 (11:39 +0200)
commitb48e3948be3320071d3cd3a0894b04082eef8643
treedee539372edbfbfbff7ec1bc9dc933297b8b1367tree
parenta59d8e8eb67086eb6df936074ef6d8fb4834bcc2commit | diff
re PR middle-end/61725 (__builtin_ffs(0) leads to wrong code generation)

PR tree-optimization/61725
* tree-vrp.c (extract_range_basic): Don't assume vr0 is unsigned
range, use range_includes_zerop_p instead of integer_zerop on
vr0->min, only use log2 of max if min is not negative.

* gcc.dg/tree-ssa/vrp93.c: New test.
* gcc.c-torture/execute/pr61725.c: New test.

From-SVN: r212353
gcc/ChangeLog diff | blob | blame | history
gcc/testsuite/ChangeLog diff | blob | blame | history
gcc/testsuite/gcc.c-torture/execute/pr61725.c [new file with mode: 0644] blob
gcc/testsuite/gcc.dg/tree-ssa/vrp93.c [new file with mode: 0644] blob
gcc/tree-vrp.c diff | blob | blame | history
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