lib/compiler/implementation/ssa/nodes.dart - Issue 10171007: Reapply "Only emit typeguards if we think they are valuable."

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Unified Diff: lib/compiler/implementation/ssa/nodes.dart

Issue 10171007: Reapply "Only emit typeguards if we think they are valuable." (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart

Patch Set: Created 8 years, 8 months ago

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Index: lib/compiler/implementation/ssa/nodes.dart

diff --git a/lib/compiler/implementation/ssa/nodes.dart b/lib/compiler/implementation/ssa/nodes.dart

index 795a2157aa1a57488bb51f6a124a09459822507d..19f794894f0250e7588c7940155c9b81fbd85197 100644

--- a/lib/compiler/implementation/ssa/nodes.dart

+++ b/lib/compiler/implementation/ssa/nodes.dart

@@ -445,6 +445,11 @@ class HBasicBlock extends HInstructionList implements Hashable {

bool isLoopHeader() => blockInformation is HLoopInformation;

bool isLabeledBlock() => blockInformation is HLabeledBlockInformation;

+ HBasicBlock get enclosingLoopHeader() {

+ if (isLoopHeader()) return this;

+ return parentLoopHeader;

+ }

bool hasGuards() => !guards.isEmpty();

void open() {

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