From 7ad97d17775832ca57166a8bf302f48ea07a785e Mon Sep 17 00:00:00 2001
From: Richard Biener <rguenther@suse.de>
Date: Thu, 31 Jan 2019 11:51:59 +0000
Subject: 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
---
gcc/tree-ssa-phiprop.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
(limited to 'gcc/tree-ssa-phiprop.c')
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 ();
--
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