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[Bug tree-optimization/50763] [4.7 Regression] ICE: verify_gimple failed: missing PHI def with -ftree-tail-merge
- From: "vries at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 24 Oct 2011 12:06:19 +0000
- Subject: [Bug tree-optimization/50763] [4.7 Regression] ICE: verify_gimple failed: missing PHI def with -ftree-tail-merge
- Auto-submitted: auto-generated
- References: <bug-50763-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50763
--- Comment #12 from vries at gcc dot gnu.org 2011-10-24 12:06:19 UTC ---
Created attachment 25590
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25590
proposed patch for problem reported in comment 10
2011-10-24 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/50763
* tree-ssa-tail-merge.c (replace_block_by): Update vops if phi_vuse1 or
phi_vuse2 is NULL_TREE only if bb1 dominates or is dominated by bb2.
* gcc.dg/pr50763-2.c: New test.