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1344477 - Part 1: Add JSOP_CALL_IGNORES_RV for function call that ignores return value.

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This commit is contained in:
Gaming4JC 2019-07-14 19:04:34 -04:00 • committed by Roy Tam
commit 417aa02122
22 changed files with 243 additions and 92 deletions
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12
js/src/vm/Interpreter.cpp
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@ -470,7 +470,13 @@ js::InternalCallOrConstruct(JSContext* cx, const CallArgs& args, MaybeConstruct
if (fun->isNative()) {
MOZ_ASSERT_IF(construct, !fun->isConstructor());
return CallJSNative(cx, fun->native(), args);
JSNative native = fun->native();
if (!construct && args.ignoresReturnValue()) {
const JSJitInfo* jitInfo = fun->jitInfo();
if (jitInfo && jitInfo->type() == JSJitInfo::IgnoresReturnValueNative)
native = jitInfo->ignoresReturnValueMethod;
}
return CallJSNative(cx, native, args);
}
if (!JSFunction::getOrCreateScript(cx, fun))
@ -2974,6 +2980,7 @@ CASE(JSOP_FUNAPPLY)
CASE(JSOP_NEW)
CASE(JSOP_CALL)
CASE(JSOP_CALL_IGNORES_RV)
CASE(JSOP_CALLITER)
CASE(JSOP_SUPERCALL)
CASE(JSOP_FUNCALL)
@ -2982,10 +2989,11 @@ CASE(JSOP_FUNCALL)
cx->runtime()->spsProfiler.updatePC(script, REGS.pc);
MaybeConstruct construct = MaybeConstruct(*REGS.pc == JSOP_NEW || *REGS.pc == JSOP_SUPERCALL);
bool ignoresReturnValue = *REGS.pc == JSOP_CALL_IGNORES_RV;
unsigned argStackSlots = GET_ARGC(REGS.pc) + construct;
MOZ_ASSERT(REGS.stackDepth() >= 2u + GET_ARGC(REGS.pc));
CallArgs args = CallArgsFromSp(argStackSlots, REGS.sp, construct);
CallArgs args = CallArgsFromSp(argStackSlots, REGS.sp, construct, ignoresReturnValue);
JSFunction* maybeFun;
bool isFunction = IsFunctionObject(args.calleev(), &maybeFun);