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Unified Diff: sdk/lib/_internal/compiler/implementation/ssa/optimize.dart

Issue 16104002: Detect (null type == null type), and change it to true. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 7 years, 7 months ago
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Index: sdk/lib/_internal/compiler/implementation/ssa/optimize.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/optimize.dart (revision 23214)
+++ sdk/lib/_internal/compiler/implementation/ssa/optimize.dart (working copy)
@@ -488,6 +488,10 @@
return graph.addConstantBool(false, constantSystem);
}
+ if (left.isNull() && right.isNull()) {
+ return graph.addConstantBool(true, constantSystem);
+ }
+
if (left.isConstantBoolean() && right.isBoolean()) {
HConstant constant = left;
if (constant.constant.isTrue()) {
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