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| author | Richard Biener <rguenther@suse.de> | 2019-01-31 11:51:59 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2019-01-31 11:51:59 +0000 |
| commit | 7ad97d17775832ca57166a8bf302f48ea07a785e (patch) | |
| tree | b4e466ff078eb3df28bace6c0e7956581aba85db /gcc/tree-ssa-phiprop.c | |
| parent | 6206a883fe7a741dbb9e09d88255a170a75950f5 (diff) | |
| download | gcc-7ad97d17775832ca57166a8bf302f48ea07a785e.zip gcc-7ad97d17775832ca57166a8bf302f48ea07a785e.tar.gz gcc-7ad97d17775832ca57166a8bf302f48ea07a785e.tar.bz2 | |
re PR tree-optimization/89135 (internal compiler error: in gimple_split_edge, at tree-cfg.c:2747)
2019-01-31 Richard Biener <rguenther@suse.de>
PR tree-optimization/89135
* tree-ssa-phiprop.c (pass_phiprop::execute): Skip blocks
with abnormal preds.
* gcc.dg/torture/pr89135.c: New testcase.
From-SVN: r268417
Diffstat (limited to 'gcc/tree-ssa-phiprop.c')
| -rw-r--r-- | gcc/tree-ssa-phiprop.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/tree-ssa-phiprop.c b/gcc/tree-ssa-phiprop.c index cad1d21..d710582 100644 --- a/gcc/tree-ssa-phiprop.c +++ b/gcc/tree-ssa-phiprop.c @@ -495,8 +495,14 @@ pass_phiprop::execute (function *fun) bbs = get_all_dominated_blocks (CDI_DOMINATORS, single_succ (ENTRY_BLOCK_PTR_FOR_FN (fun))); FOR_EACH_VEC_ELT (bbs, i, bb) - for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) - did_something |= propagate_with_phi (bb, gsi.phi (), phivn, n); + { + /* Since we're going to move dereferences across predecessor + edges avoid blocks with abnormal predecessors. */ + if (bb_has_abnormal_pred (bb)) + continue; + for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi)) + did_something |= propagate_with_phi (bb, gsi.phi (), phivn, n); + } if (did_something) gsi_commit_edge_inserts (); |