MIPS: Fix bugs in IfBuilder and improve functionality

Port r14327 (21310b91)

BUG=

Review URL: https://codereview.chromium.org/14246017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14343 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
palfia@homejinni.com 2013-04-18 23:46:37 +00:00
parent 80adb58933
commit bd03455c4e

View File

@ -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.