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Unified Diff: src/ic/ppc/ic-ppc.cc

Issue 1185343005: Revert of Revert of [strong] Implement strong mode restrictions on property access (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 6 months ago
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Index: src/ic/ppc/ic-ppc.cc
diff --git a/src/ic/ppc/ic-ppc.cc b/src/ic/ppc/ic-ppc.cc
index fdb88aee50ce57c38cdb96681b33b8cf2d602b19..6b4fc4599722ce02baf5a83ea7919b3aabfac34c 100644
--- a/src/ic/ppc/ic-ppc.cc
+++ b/src/ic/ppc/ic-ppc.cc
@@ -167,7 +167,8 @@
static void GenerateFastArrayLoad(MacroAssembler* masm, Register receiver,
Register key, Register elements,
Register scratch1, Register scratch2,
- Register result, Label* slow) {
+ Register result, Label* slow,
+ LanguageMode language_mode) {
// Register use:
//
// receiver - holds the receiver on entry.
@@ -189,7 +190,7 @@
//
// scratch2 - used to hold maps, prototypes, and the loaded value.
Label check_prototypes, check_next_prototype;
- Label done, in_bounds, return_undefined;
+ Label done, in_bounds, absent;
__ LoadP(elements, FieldMemOperand(receiver, JSObject::kElementsOffset));
__ AssertFastElements(elements);
@@ -208,7 +209,7 @@
__ LoadP(scratch2, FieldMemOperand(scratch2, Map::kPrototypeOffset));
// scratch2: current prototype
__ CompareRoot(scratch2, Heap::kNullValueRootIndex);
- __ beq(&return_undefined);
+ __ beq(&absent);
__ LoadP(elements, FieldMemOperand(scratch2, JSObject::kElementsOffset));
__ LoadP(scratch2, FieldMemOperand(scratch2, HeapObject::kMapOffset));
// elements: elements of current prototype
@@ -223,9 +224,14 @@
__ bne(slow);
__ jmp(&check_next_prototype);
- __ bind(&return_undefined);
- __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
- __ jmp(&done);
+ __ bind(&absent);
+ if (is_strong(language_mode)) {
+ // Strong mode accesses must throw in this case, so call the runtime.
+ __ jmp(slow);
+ } else {
+ __ LoadRoot(result, Heap::kUndefinedValueRootIndex);
+ __ jmp(&done);
+ }
__ bind(&in_bounds);
// Fast case: Do the load.
@@ -288,7 +294,7 @@
// Dictionary load failed, go slow (but don't miss).
__ bind(&slow);
- GenerateRuntimeGetProperty(masm);
+ GenerateSlow(masm);
}
@@ -323,13 +329,16 @@
}
-void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
+void LoadIC::GenerateSlow(MacroAssembler* masm) {
// The return address is in lr.
__ mr(LoadIC_TempRegister(), LoadDescriptor::ReceiverRegister());
__ Push(LoadIC_TempRegister(), LoadDescriptor::NameRegister());
- __ TailCallRuntime(Runtime::kGetProperty, 2, 1);
+ ExternalReference ref =
+ ExternalReference(IC_Utility(kLoadIC_Slow), masm->isolate());
+ int arg_count = 2;
+ __ TailCallExternalReference(ref, arg_count, 1);
}
@@ -351,16 +360,20 @@
}
-void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
+void KeyedLoadIC::GenerateSlow(MacroAssembler* masm) {
// The return address is in lr.
__ Push(LoadDescriptor::ReceiverRegister(), LoadDescriptor::NameRegister());
- __ TailCallRuntime(Runtime::kKeyedGetProperty, 2, 1);
-}
-
-
-void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm) {
+ ExternalReference ref =
+ ExternalReference(IC_Utility(kKeyedLoadIC_Slow), masm->isolate());
+ int arg_count = 2;
+ __ TailCallExternalReference(ref, arg_count, 1);
+}
+
+
+void KeyedLoadIC::GenerateMegamorphic(MacroAssembler* masm,
+ LanguageMode language_mode) {
// The return address is in lr.
Label slow, check_name, index_smi, index_name, property_array_property;
Label probe_dictionary, check_number_dictionary;
@@ -384,7 +397,8 @@
// Check the receiver's map to see if it has fast elements.
__ CheckFastElements(r3, r6, &check_number_dictionary);
- GenerateFastArrayLoad(masm, receiver, key, r3, r6, r7, r3, &slow);
+ GenerateFastArrayLoad(masm, receiver, key, r3, r6, r7, r3, &slow,
+ language_mode);
__ IncrementCounter(isolate->counters()->keyed_load_generic_smi(), 1, r7, r6);
__ Ret();
@@ -406,7 +420,7 @@
__ bind(&slow);
__ IncrementCounter(isolate->counters()->keyed_load_generic_slow(), 1, r7,
r6);
- GenerateRuntimeGetProperty(masm);
+ GenerateSlow(masm);
__ bind(&check_name);
GenerateKeyNameCheck(masm, key, r3, r6, &index_name, &slow);
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