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Bug 1106171 - Sink should not move instructions to resume-point-less join-blocks. r=bhackett

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This commit is contained in:
Nicolas B. Pierron 2014-12-05 20:18:45 +01:00
parent 8d82fbb5f3
commit 1c250a0fa4
1 changed files with 7 additions and 0 deletions
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7
js/src/jit/Sink.cpp
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@ -146,6 +146,13 @@ Sink(MIRGenerator *mir, MIRGraph &graph)
if (!ins->canClone())
continue;
// If the block is a split-edge block, which is created for folding
// test conditions, then the block has no resume point and has
// multiple predecessors. In such case, we cannot safely move
// bailing instruction to these blocks as we have no way to bailout.
if (!usesDominator->entryResumePoint() && usesDominator->numPredecessors() != 1)
continue;
JitSpewDef(JitSpew_Sink, " Can Clone & Recover, sink instruction\n", ins);
JitSpew(JitSpew_Sink, " into Block %u", usesDominator->id());