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| author | Alexandre Oliva <aoliva@redhat.com> | 2011-02-03 06:01:40 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2011-02-03 06:01:40 +0000 |
| commit | 1551d44aba2deeb55393396502ca091e41bcfee3 (patch) | |
| tree | 24e9cf0f5046d167fed3c35adba388143c7ffc46 /gcc/tree-ssa-loop-niter.c | |
| parent | c94854734b65d62a1194d22e36e88d6aa3a2a287 (diff) | |
| download | gcc-1551d44aba2deeb55393396502ca091e41bcfee3.zip gcc-1551d44aba2deeb55393396502ca091e41bcfee3.tar.gz gcc-1551d44aba2deeb55393396502ca091e41bcfee3.tar.bz2 | |
re PR tree-optimization/45122 (-funsafe-loop-optimizations causes FAIL: gcc.c-torture/execute/pr27285.c execution)
gcc/ChangeLog:
PR tree-optimization/45122
* tree-ssa-loop-niter.c (number_of_iterations_exit): Don't make
unsafe assumptions when there's more than one loop exit.
gcc/testsuite/ChangeLog:
PR tree-optimization/45122
* gcc.dg/tree-ssa/pr45122.c: New.
From-SVN: r169781
Diffstat (limited to 'gcc/tree-ssa-loop-niter.c')
| -rw-r--r-- | gcc/tree-ssa-loop-niter.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c index ee85f6f..c14e13c 100644 --- a/gcc/tree-ssa-loop-niter.c +++ b/gcc/tree-ssa-loop-niter.c @@ -1890,7 +1890,7 @@ number_of_iterations_exit (struct loop *loop, edge exit, /* With -funsafe-loop-optimizations we assume that nothing bad can happen. But if we can prove that there is overflow or some other source of weird behavior, ignore the loop even with -funsafe-loop-optimizations. */ - if (integer_zerop (niter->assumptions)) + if (integer_zerop (niter->assumptions) || !single_exit (loop)) return false; if (flag_unsafe_loop_optimizations) |