diff options
| author | Bin Cheng <bin.cheng@arm.com> | 2018-01-11 15:41:41 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2018-01-11 15:41:41 +0000 |
| commit | 4e090bcc53ab54831a180f4ee57f5e5de82a0d56 (patch) | |
| tree | c13ad0c6e57e8bfdfcb60f6ad674c63a67904aea /gcc/gimple-loop-interchange.cc | |
| parent | eccf4d702029b48512d573382ef5534a5df23893 (diff) | |
| download | gcc-4e090bcc53ab54831a180f4ee57f5e5de82a0d56.zip gcc-4e090bcc53ab54831a180f4ee57f5e5de82a0d56.tar.gz gcc-4e090bcc53ab54831a180f4ee57f5e5de82a0d56.tar.bz2 | |
re PR tree-optimization/83695 (ICE on valid code at -O3: Segmentation fault)
PR tree-optimization/83695
* gimple-loop-linterchange.cc
(tree_loop_interchange::interchange_loops): Call scev_reset_htab to
reset cached scev information after interchange.
(pass_linterchange::execute): Remove call to scev_reset_htab.
gcc/testsuite
PR tree-optimization/83695
* gcc.dg/tree-ssa/pr83695.c: New test.
From-SVN: r256541
Diffstat (limited to 'gcc/gimple-loop-interchange.cc')
| -rw-r--r-- | gcc/gimple-loop-interchange.cc | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/gimple-loop-interchange.cc b/gcc/gimple-loop-interchange.cc index 01a26c0..eb35263 100644 --- a/gcc/gimple-loop-interchange.cc +++ b/gcc/gimple-loop-interchange.cc @@ -1119,6 +1119,10 @@ tree_loop_interchange::interchange_loops (loop_cand &iloop, loop_cand &oloop) oloop.m_loop->any_likely_upper_bound = false; free_numbers_of_iterations_estimates (oloop.m_loop); + /* Clear all cached scev information. This is expensive but shouldn't be + a problem given we interchange in very limited times. */ + scev_reset_htab (); + /* ??? The association between the loop data structure and the CFG changed, so what was loop N at the source level is now loop M. We should think of retaining the association or breaking @@ -2070,9 +2074,6 @@ pass_linterchange::execute (function *fun) loop_nest.release (); } - if (changed_p) - scev_reset_htab (); - return changed_p ? (TODO_update_ssa_only_virtuals) : 0; } |