From 529b39d8ab7bb1902dc4c77c77194525cfe77adf Mon Sep 17 00:00:00 2001 From: Bill Schmidt Date: Wed, 29 Feb 2012 13:06:28 +0000 Subject: [PATCH] re PR tree-optimization/52424 (dom prematurely pops entries from const_and_copies stack) 2012-02-29 Bill Schmidt PR tree-optimization/52424 * tree-ssa-dom.c (dom_opt_leave_block): Push a marker before calling dom_thread_across_edge. From-SVN: r184662 --- gcc/ChangeLog | 6 ++++++ gcc/tree-ssa-dom.c | 3 +++ 2 files changed, 9 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0e032a8eb7a..3a59fe7c1b1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2012-02-29 Bill Schmidt + + PR tree-optimization/52424 + * tree-ssa-dom.c (dom_opt_leave_block): Push a marker before + calling dom_thread_across_edge. + 2012-02-29 Georg-Johann Lay * config/avr/avr.c: Move definition of TARGET macros to end of file. diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index a9a658f2c44..4ea9644dd27 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -1779,6 +1779,9 @@ dom_opt_leave_block (struct dom_walk_data *walk_data, basic_block bb) && (single_succ_edge (bb)->flags & EDGE_ABNORMAL) == 0 && potentially_threadable_block (single_succ (bb))) { + /* Push a marker on the stack, which thread_across_edge expects + and will remove. */ + VEC_safe_push (tree, heap, const_and_copies_stack, NULL_TREE); dom_thread_across_edge (walk_data, single_succ_edge (bb)); } else if ((last = last_stmt (bb))