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[Bug tree-optimization/85529] [7/8/9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 27 Apr 2018 07:12:16 +0000
- Subject: [Bug tree-optimization/85529] [7/8/9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
- Auto-submitted: auto-generated
- References: <bug-85529-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85529
--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Apr 27 07:11:44 2018
New Revision: 259697
URL: https://gcc.gnu.org/viewcvs?rev=259697&root=gcc&view=rev
Log:
PR tree-optimization/85529
* tree-ssa-reassoc.c (optimize_range_tests_var_bound): Add FIRST_BB
argument. Don't call get_nonzero_bits if opcode is ERROR_MARK_NODE,
rhs2 def stmt's bb is dominated by first_bb and it isn't an obvious
zero extension or masking of the MSB bit.
(optimize_range_tests): Add FIRST_BB argument, pass it through
to optimize_range_tests_var_bound.
(maybe_optimize_range_tests, reassociate_bb): Adjust
optimize_range_tests callers.
* gcc.c-torture/execute/pr85529-1.c: New test.
* gcc.c-torture/execute/pr85529-2.c: New test.
* gcc.dg/pr85529.c: New test.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/pr85529-1.c
branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/pr85529-2.c
branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr85529.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/tree-ssa-reassoc.c