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authorMoonchild <moonchild@palemoon.org>2020-05-05 23:43:22 +0000
committerMoonchild <moonchild@palemoon.org>2020-05-05 23:43:22 +0000
commitf5c2775a69cff7e1aea6b9258760fd4acc36837f (patch)
tree7396f1ee55a80a67ac1e3e69c0616e18b796cec0 /js
parentb378ddaace9e745e9b4a856eb06679e5e8fa07f5 (diff)
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[js] Record load in MCreateThis alias set.
Diffstat (limited to 'js')
-rw-r--r--js/src/jit/AliasAnalysisShared.cpp1
-rw-r--r--js/src/jit/MIR.h5
2 files changed, 4 insertions, 2 deletions
diff --git a/js/src/jit/AliasAnalysisShared.cpp b/js/src/jit/AliasAnalysisShared.cpp
index 99c23d2a3..21a479bf8 100644
--- a/js/src/jit/AliasAnalysisShared.cpp
+++ b/js/src/jit/AliasAnalysisShared.cpp
@@ -134,6 +134,7 @@ GetObject(const MDefinition* ins)
case MDefinition::Op_SetArgumentsObjectArg:
case MDefinition::Op_GetFrameArgument:
case MDefinition::Op_SetFrameArgument:
+ case MDefinition::Op_CreateThis:
case MDefinition::Op_CompareExchangeTypedArrayElement:
case MDefinition::Op_AtomicExchangeTypedArrayElement:
case MDefinition::Op_AtomicTypedArrayElementBinop:
diff --git a/js/src/jit/MIR.h b/js/src/jit/MIR.h
index 81662a9be..a7daea081 100644
--- a/js/src/jit/MIR.h
+++ b/js/src/jit/MIR.h
@@ -5007,9 +5007,10 @@ class MCreateThis
TRIVIAL_NEW_WRAPPERS
NAMED_OPERANDS((0, getCallee), (1, getNewTarget))
- // Although creation of |this| modifies global state, it is safely repeatable.
+ // Performs a property read from |newTarget| if |newTarget| is a JSFunction
+ // with an own |.prototype| property.
AliasSet getAliasSet() const override {
- return AliasSet::None();
+ return AliasSet::Load(AliasSet::Any);
}
bool possiblyCalls() const override {
return true;