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Unified Diff: src/mips64/code-stubs-mips64.cc

Issue 767743002: Hydrogen code stubs for vector-based ICs. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Rebase. Created 6 years ago
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Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index 55c073ff454221f8b9920342deeb1e8d3ca1d011..76a469a516b7a9ec7eaa2c793a8ea0b0ed8eee24 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -1347,10 +1347,16 @@ void LoadIndexedStringStub::Generate(MacroAssembler* masm) {
Register receiver = LoadDescriptor::ReceiverRegister();
Register index = LoadDescriptor::NameRegister();
- Register scratch = a3;
+ Register scratch = a4;
Register result = v0;
DCHECK(!scratch.is(receiver) && !scratch.is(index));
+ DCHECK(!FLAG_vector_ics ||
+ (!scratch.is(VectorLoadICDescriptor::VectorRegister()) &&
+ result.is(VectorLoadICDescriptor::SlotRegister())));
+ // StringCharAtGenerator doesn't use the result register until it's passed
+ // the different miss possibilities. If it did, we would have a conflict
+ // when FLAG_vector_ics is true.
StringCharAtGenerator char_at_generator(receiver, index, scratch, result,
&miss, // When not a string.
&miss, // When not a number.
@@ -1564,8 +1570,14 @@ void InstanceofStub::Generate(MacroAssembler* masm) {
void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
Label miss;
Register receiver = LoadDescriptor::ReceiverRegister();
- NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, a3,
- a4, &miss);
+ // Ensure that the vector and slot registers won't be clobbered before
+ // calling the miss handler.
+ DCHECK(!FLAG_vector_ics ||
+ !AreAliased(a4, a5, VectorLoadICDescriptor::VectorRegister(),
+ VectorLoadICDescriptor::SlotRegister()));
+
+ NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, a4,
+ a5, &miss);
__ bind(&miss);
PropertyAccessCompiler::TailCallBuiltin(
masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC));
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