Reviewers: Paul Lind, danno, kisg, kilvadyb,
Description:
MIPS: Fix bugs in IfBuilder and improve functionality
Port r14327 (21310b91)
BUG=
Please review this at https://codereview.chromium.org/14246017/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/mips/lithium-mips.cc
Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index
afa806c4ec7d8e537f9114ea296055bb1b11c64d..0d12c458b8ae6e36d7be7441eb49a7371e5d0343
100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -823,11 +823,15 @@ void LChunkBuilder::DoBasicBlock(HBasicBlock* block,
HBasicBlock* next_block) {
HEnvironment* last_environment = pred->last_environment();
for (int i = 0; i < block->phis()->length(); ++i) {
HPhi* phi = block->phis()->at(i);
- last_environment->SetValueAt(phi->merged_index(), phi);
+ if (phi->merged_index() < last_environment->length()) {
+ last_environment->SetValueAt(phi->merged_index(), phi);
+ }
}
for (int i = 0; i < block->deleted_phis()->length(); ++i) {
- last_environment->SetValueAt(block->deleted_phis()->at(i),
- graph_->GetConstantUndefined());
+ if (block->deleted_phis()->at(i) < last_environment->length()) {
+ last_environment->SetValueAt(block->deleted_phis()->at(i),
+ graph_->GetConstantUndefined());
+ }
}
block->UpdateEnvironment(last_environment);
// Pick up the outgoing argument count of one of the predecessors.
--
--
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