diff options
| author | Richard Biener <rguenther@suse.de> | 2018-04-09 13:27:33 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2018-04-09 13:27:33 +0000 |
| commit | 46e58e180d6ab1fa37acc96f0b8cbf569bbf4105 (patch) | |
| tree | 0e7725d434692876e63909c136cabd1e84fc7237 /gcc/tree-ssa-loop-niter.c | |
| parent | f04fd9038ee58325748fea2f085d43eddcdb37ad (diff) | |
| download | gcc-46e58e180d6ab1fa37acc96f0b8cbf569bbf4105.zip gcc-46e58e180d6ab1fa37acc96f0b8cbf569bbf4105.tar.gz gcc-46e58e180d6ab1fa37acc96f0b8cbf569bbf4105.tar.bz2 | |
re PR tree-optimization/85284 (Loop miscompilation starting with r238367)
2018-04-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/85284
* tree-ssa-loop-niter.c (number_of_iterations_exit_assumptions):
Only use the niter constraining form of simple_iv when the exit
is always executed.
* gcc.dg/torture/pr85284.c: New testcase.
From-SVN: r259234
Diffstat (limited to 'gcc/tree-ssa-loop-niter.c')
| -rw-r--r-- | gcc/tree-ssa-loop-niter.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c index fa49abf..7a54c5f 100644 --- a/gcc/tree-ssa-loop-niter.c +++ b/gcc/tree-ssa-loop-niter.c @@ -2356,11 +2356,11 @@ number_of_iterations_exit_assumptions (struct loop *loop, edge exit, tree iv0_niters = NULL_TREE; if (!simple_iv_with_niters (loop, loop_containing_stmt (stmt), - op0, &iv0, &iv0_niters, false)) + op0, &iv0, safe ? &iv0_niters : NULL, false)) return false; tree iv1_niters = NULL_TREE; if (!simple_iv_with_niters (loop, loop_containing_stmt (stmt), - op1, &iv1, &iv1_niters, false)) + op1, &iv1, safe ? &iv1_niters : NULL, false)) return false; /* Give up on complicated case. */ if (iv0_niters && iv1_niters) |