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Unified Diff: src/full-codegen/mips64/full-codegen-mips64.cc

Issue 1683643002: Mark null and undefined as undetectable, and use it to handle abstract equality comparison in the g… (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 10 months ago
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Index: src/full-codegen/mips64/full-codegen-mips64.cc
diff --git a/src/full-codegen/mips64/full-codegen-mips64.cc b/src/full-codegen/mips64/full-codegen-mips64.cc
index 9e2caf1fea0eef5c367b174661b26cb9b45e1764..90daaa4c86c659acc285546ba2b4625187400be7 100644
--- a/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -527,7 +527,7 @@ void FullCodeGenerator::TestContext::Plug(Handle<Object> lit) const {
true,
true_label_,
false_label_);
- DCHECK(!lit->IsUndetectableObject()); // There are no undetectable literals.
+ DCHECK(lit->IsNull() || lit->IsUndefined() || !lit->IsUndetectableObject());
if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) {
if (false_label_ != fall_through_) __ Branch(false_label_);
} else if (lit->IsTrue() || lit->IsJSObject()) {
@@ -4312,8 +4312,8 @@ void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr,
__ LoadRoot(at, Heap::kFalseValueRootIndex);
Split(eq, v0, Operand(at), if_true, if_false, fall_through);
} else if (String::Equals(check, factory->undefined_string())) {
- __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
- __ Branch(if_true, eq, v0, Operand(at));
+ __ LoadRoot(at, Heap::kNullValueRootIndex);
+ __ Branch(if_false, eq, v0, Operand(at));
__ JumpIfSmi(v0, if_false);
// Check for undetectable objects => true.
__ ld(v0, FieldMemOperand(v0, HeapObject::kMapOffset));
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