Reviewers: Jakob, Sven Panne,
Message:
PTAL
Description:
Don't double unlink in DCE.
Please review this at https://chromiumcodereview.appspot.com/14914004/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/hydrogen.cc
Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index
1b02a62c4370147bf4a7dd83f397391bdf757ad7..58a9b78750bb7401bfdc9e167800f8f01d3ef078
100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -5436,6 +5436,9 @@ void HGraph::DeadCodeElimination() {
while (!worklist.is_empty()) {
HInstruction* instr = worklist.RemoveLast();
+ // This happens when an instruction is used multiple times as operand.
That
+ // in turn could happen through GVN.
+ if (!instr->IsLinked()) continue;
if (FLAG_trace_dead_code_elimination) {
HeapStringAllocator allocator;
StringStream stream(&allocator);
--
--
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