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Issue #1894 - Part 4: Implement IonMonkey support for nullish coalescing

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Based on https://bugzilla.mozilla.org/show_bug.cgi?id=1566141
This commit is contained in:
FranklinDM 2022-05-20 15:38:43 +08:00 • committed by roytam1
commit 5812721809
12 changed files with 123 additions and 16 deletions
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18
js/src/jit/CodeGenerator.cpp
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@ -11517,6 +11517,24 @@ CodeGenerator::visitIsObjectAndBranch(LIsObjectAndBranch* ins)
testObjectEmitBranch(Assembler::Equal, value, ins->ifTrue(), ins->ifFalse());
}
void
CodeGenerator::visitIsNullOrUndefined(LIsNullOrUndefined* ins)
{
Register output = ToRegister(ins->output());
ValueOperand value = ToValue(ins, LIsNullOrUndefined::Input);
Label isNotNull, done;
masm.branchTestNull(Assembler::NotEqual, value, &isNotNull);
masm.move32(Imm32(1), output);
masm.jump(&done);
masm.bind(&isNotNull);
masm.testUndefinedSet(Assembler::Equal, value, output);
masm.bind(&done);
}
void
CodeGenerator::loadOutermostJSScript(Register reg)
{