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Issue #3049 - Preserve loongarch64 ra across baseline helper calls

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Basilisk-Dev 2026-04-24 11:49:10 -04:00 • committed by wuggy
commit 63a142a912
3 changed files with 36 additions and 2 deletions
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3
js/src/jit/BaselineCompiler.cpp
View file

@ -458,7 +458,6 @@ BaselineCompiler::emitEpilogue()
masm.pop(BaselineFrameReg);
emitProfilerExitFrame();
masm.ret();
return true;
}
@ -484,7 +483,7 @@ BaselineCompiler::emitOutOfLinePostBarrierSlot()
// On ARM, save the link register before calling. It contains the return
// address. The |masm.ret()| later will pop this into |pc| to return.
masm.push(lr);
#elif defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
#elif defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64) || defined(JS_CODEGEN_LOONGARCH64)
masm.push(ra);
#endif
masm.pushValue(R0);

12
js/src/jit/BaselineIC.cpp
View file

@ -679,9 +679,15 @@ ICToBool_Object::Compiler::generateStubCode(MacroAssembler& masm)
EmitReturnFromIC(masm);
masm.bind(&slowPath);
#ifdef JS_CODEGEN_LOONGARCH64
masm.push(ra);
#endif
masm.setupUnalignedABICall(scratch);
masm.passABIArg(objReg);
masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, js::EmulatesUndefined));
#ifdef JS_CODEGEN_LOONGARCH64
masm.pop(ra);
#endif
masm.convertBoolToInt32(ReturnReg, ReturnReg);
masm.xor32(Imm32(1), ReturnReg);
masm.tagValue(JSVAL_TYPE_BOOLEAN, ReturnReg, R0);
@ -7468,6 +7474,9 @@ ICTableSwitch::Compiler::generateStubCode(MacroAssembler& masm)
masm.convertDoubleToInt32(FloatReg0, key, &outOfRange, /* negativeZeroCheck = */ false);
} else {
// Pass pointer to double value.
#ifdef JS_CODEGEN_LOONGARCH64
masm.push(ra);
#endif
masm.pushValue(R0);
masm.moveStackPtrTo(R0.scratchReg());
@ -7479,6 +7488,9 @@ ICTableSwitch::Compiler::generateStubCode(MacroAssembler& masm)
// int32.
masm.movePtr(ReturnReg, scratch);
masm.popValue(R0);
#ifdef JS_CODEGEN_LOONGARCH64
masm.pop(ra);
#endif
masm.branchIfFalseBool(scratch, &outOfRange);
masm.unboxInt32(R0, key);
}

23
js/src/jit/SharedIC.cpp
View file

@ -848,6 +848,8 @@ ICStubCompiler::emitPostWriteBarrierSlot(MacroAssembler& masm, Register obj, Val
// void PostWriteBarrier(JSRuntime* rt, JSObject* obj);
#if defined(JS_CODEGEN_ARM) || defined(JS_CODEGEN_MIPS32) || defined(JS_CODEGEN_MIPS64)
saveRegs.add(ICTailCallReg);
#elif defined(JS_CODEGEN_LOONGARCH64)
masm.push(ra);
#endif
saveRegs.set() = GeneralRegisterSet::Intersect(saveRegs.set(), GeneralRegisterSet::Volatile());
masm.PushRegsInMask(saveRegs);
@ -857,6 +859,9 @@ ICStubCompiler::emitPostWriteBarrierSlot(MacroAssembler& masm, Register obj, Val
masm.passABIArg(obj);
masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, PostWriteBarrier));
masm.PopRegsInMask(saveRegs);
#ifdef JS_CODEGEN_LOONGARCH64
masm.pop(ra);
#endif
masm.bind(&skipBarrier);
}
@ -1292,10 +1297,16 @@ ICBinaryArith_Double::Compiler::generateStubCode(MacroAssembler& masm)
masm.divDouble(FloatReg1, FloatReg0);
break;
case JSOP_MOD:
#ifdef JS_CODEGEN_LOONGARCH64
masm.push(ra);
#endif
masm.setupUnalignedABICall(R0.scratchReg());
masm.passABIArg(FloatReg0, MoveOp::DOUBLE);
masm.passABIArg(FloatReg1, MoveOp::DOUBLE);
masm.callWithABI(JS_FUNC_TO_DATA_PTR(void*, NumberMod), MoveOp::DOUBLE);
#ifdef JS_CODEGEN_LOONGARCH64
masm.pop(ra);
#endif
MOZ_ASSERT(ReturnDoubleReg == FloatReg0);
break;
default:
@ -1417,9 +1428,15 @@ ICBinaryArith_DoubleWithInt32::Compiler::generateStubCode(MacroAssembler& masm)
masm.bind(&truncateABICall);
masm.push(intReg);
#ifdef JS_CODEGEN_LOONGARCH64
masm.push(ra);
#endif
masm.setupUnalignedABICall(scratchReg);
masm.passABIArg(FloatReg0, MoveOp::DOUBLE);
masm.callWithABI(mozilla::BitwiseCast<void*, int32_t(*)(double)>(JS::ToInt32));
#ifdef JS_CODEGEN_LOONGARCH64
masm.pop(ra);
#endif
masm.storeCallInt32Result(scratchReg);
masm.pop(intReg);
@ -1581,9 +1598,15 @@ ICUnaryArith_Double::Compiler::generateStubCode(MacroAssembler& masm)
masm.jump(&doneTruncate);
masm.bind(&truncateABICall);
#ifdef JS_CODEGEN_LOONGARCH64
masm.push(ra);
#endif
masm.setupUnalignedABICall(scratchReg);
masm.passABIArg(FloatReg0, MoveOp::DOUBLE);
masm.callWithABI(BitwiseCast<void*, int32_t(*)(double)>(JS::ToInt32));
#ifdef JS_CODEGEN_LOONGARCH64
masm.pop(ra);
#endif
masm.storeCallInt32Result(scratchReg);
masm.bind(&doneTruncate);