From 1d44def2c2faae5f7e5a58fb57e0c9991a339bd5 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Mon, 19 May 2014 14:33:31 +0000 Subject: re PR tree-optimization/61221 (ICE on valid code at -O1 and above on x86_64-linux-gnu) 2014-05-19 Richard Biener PR tree-optimization/61221 * tree-ssa-pre.c (eliminate_dom_walker::before_dom_children): Do nothing for unreachable blocks. * tree-ssa-sccvn.c (cond_dom_walker::before_dom_children): Improve unreachability detection. * gcc.dg/torture/pr61221.c: New testcase. From-SVN: r210614 --- gcc/tree-ssa-pre.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'gcc/tree-ssa-pre.c') diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index f634f5e..e487d28 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4010,6 +4010,15 @@ eliminate_dom_walker::before_dom_children (basic_block b) /* Mark new bb. */ el_avail_stack.safe_push (NULL_TREE); + /* If this block is not reachable do nothing. */ + edge_iterator ei; + edge e; + FOR_EACH_EDGE (e, ei, b->preds) + if (e->flags & EDGE_EXECUTABLE) + break; + if (!e) + return; + for (gsi = gsi_start_phis (b); !gsi_end_p (gsi);) { gimple stmt, phi = gsi_stmt (gsi); -- cgit v1.1