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Unified Diff: src/full-codegen/arm64/full-codegen-arm64.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/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index dcc26d4a73aa213c5af5e7600a3665f30096e108..30fa37ebce846da3d631ff6941349efc44d705d5 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -531,7 +531,7 @@ 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_) __ B(false_label_);
} else if (lit->IsTrue() || lit->IsJSObject()) {
@@ -4107,7 +4107,7 @@ void FullCodeGenerator::EmitLiteralCompareTypeof(Expression* expr,
} else if (String::Equals(check, factory->undefined_string())) {
ASM_LOCATION(
"FullCodeGenerator::EmitLiteralCompareTypeof undefined_string");
- __ JumpIfRoot(x0, Heap::kUndefinedValueRootIndex, if_true);
+ __ JumpIfRoot(x0, Heap::kNullValueRootIndex, if_false);
__ JumpIfSmi(x0, if_false);
// Check for undetectable objects => true.
__ Ldr(x0, FieldMemOperand(x0, HeapObject::kMapOffset));
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