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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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8
js/src/jsopcode.cpp
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@ -132,7 +132,8 @@ js::StackUses(JSScript* script, jsbytecode* pc)
return 2 + GET_ARGC(pc) + 1;
default:
/* stack: fun, this, [argc arguments] */
MOZ_ASSERT(op == JSOP_CALL || op == JSOP_EVAL || op == JSOP_CALLITER ||
MOZ_ASSERT(op == JSOP_CALL || op == JSOP_CALL_IGNORES_RV || op == JSOP_EVAL ||
op == JSOP_CALLITER ||
op == JSOP_STRICTEVAL || op == JSOP_FUNCALL || op == JSOP_FUNAPPLY);
return 2 + GET_ARGC(pc);
}
@ -1363,6 +1364,7 @@ ExpressionDecompiler::decompilePC(jsbytecode* pc)
case JSOP_NEWTARGET:
return write("new.target");
case JSOP_CALL:
case JSOP_CALL_IGNORES_RV:
case JSOP_CALLITER:
case JSOP_FUNCALL:
return decompilePCForStackOperand(pc, -int32_t(GET_ARGC(pc) + 2)) &&
@ -1662,7 +1664,7 @@ DecompileArgumentFromStack(JSContext* cx, int formalIndex, char** res)
/* Don't handle getters, setters or calls from fun.call/fun.apply. */
JSOp op = JSOp(*current);
if (op != JSOP_CALL && op != JSOP_NEW)
if (op != JSOP_CALL && op != JSOP_CALL_IGNORES_RV && op != JSOP_NEW)
return true;
if (static_cast<unsigned>(formalIndex) >= GET_ARGC(current))
@ -1725,6 +1727,8 @@ js::CallResultEscapes(jsbytecode* pc)
if (*pc == JSOP_CALL)
pc += JSOP_CALL_LENGTH;
else if (*pc == JSOP_CALL_IGNORES_RV)
pc += JSOP_CALL_IGNORES_RV_LENGTH;
else if (*pc == JSOP_SPREADCALL)
pc += JSOP_SPREADCALL_LENGTH;
else