bool breaksRegion(SrcKey sk) {
switch (sk.op()) {
case Op::SSwitch:
case Op::CreateCont:
case Op::Yield:
case Op::YieldK:
case Op::RetC:
case Op::RetV:
case Op::Exit:
case Op::Fatal:
case Op::Throw:
case Op::Unwind:
case Op::Eval:
case Op::NativeImpl:
return true;
case Op::Await:
// We break regions at resumed Await instructions, to avoid
// duplicating the translation of the resumed SrcKey after the
// Await.
return sk.resumed();
default:
return false;
}
}
bool InliningDecider::canInlineAt(SrcKey callSK, const Func* callee) const {
if (m_disabled ||
!callee ||
!RuntimeOption::EvalHHIREnableGenTimeInlining ||
RuntimeOption::EvalJitEnableRenameFunction ||
callee->attrs() & AttrInterceptable) {
return false;
}
// We can only inline at normal FCalls.
if (callSK.op() != Op::FCall &&
callSK.op() != Op::FCallD) {
return false;
}
// Don't inline from resumed functions. The inlining mechanism doesn't have
// support for these---it has no way to redefine stack pointers relative to
// the frame pointer, because in a resumed function the frame pointer points
// into the heap instead of into the eval stack.
if (callSK.resumed()) return false;
// TODO(#4238160): Inlining into pseudomain callsites is still buggy.
if (callSK.func()->isPseudoMain()) return false;
if (!isCalleeInlinable(callSK, callee) || !checkNumArgs(callSK, callee)) {
return false;
}
return true;
}
bool InliningDecider::canInlineAt(SrcKey callSK, const Func* callee) const {
if (!callee ||
!RuntimeOption::EvalHHIREnableGenTimeInlining ||
RuntimeOption::EvalJitEnableRenameFunction ||
callee->attrs() & AttrInterceptable) {
return false;
}
if (callee->cls()) {
if (!classHasPersistentRDS(callee->cls())) {
// if the callee's class is not persistent, its still ok
// to use it if we're jitting into a method of a subclass
auto ctx = callSK.func()->cls();
if (!ctx || !ctx->classof(callee->cls())) {
return false;
}
}
} else {
auto const handle = callee->funcHandle();
if (handle == rds::kInvalidHandle || !rds::isPersistentHandle(handle)) {
// if the callee isn't persistent, its still ok to
// use it if its defined at the top level in the same
// unit as the caller
if (callee->unit() != callSK.unit() || !callee->top()) {
return false;
}
}
}
// If inlining was disabled... don't inline.
if (m_disabled) return false;
// TODO(#3331014): We have this hack until more ARM codegen is working.
if (arch() == Arch::ARM) return false;
// We can only inline at normal FCalls.
if (callSK.op() != Op::FCall &&
callSK.op() != Op::FCallD) {
return false;
}
// Don't inline from resumed functions. The inlining mechanism doesn't have
// support for these---it has no way to redefine stack pointers relative to
// the frame pointer, because in a resumed function the frame pointer points
// into the heap instead of into the eval stack.
if (callSK.resumed()) return false;
// TODO(#4238160): Inlining into pseudomain callsites is still buggy.
if (callSK.func()->isPseudoMain()) return false;
if (!isCalleeInlinable(callSK, callee) || !checkNumArgs(callSK, callee)) {
return false;
}
return true;
}
/*
* Check that we don't have any missing or extra arguments.
*/
bool checkNumArgs(SrcKey callSK, const Func* callee, Annotations& annotations) {
assertx(callSK.op() == Op::FCall);
assertx(callee);
auto refuse = [&] (const char* why) {
return traceRefusal(callSK, callee, why, annotations);
};
auto pc = callSK.pc();
auto const fca = getImm(pc, 0).u_FCA;
auto const numParams = callee->numParams();
if (fca.numArgs > numParams) {
return refuse("callee called with too many arguments");
}
if (fca.hasUnpack) {
return refuse("callee called with variadic arguments");
}
if (fca.numRets != 1) {
return refuse("callee with multiple returns");
}
// It's okay if we passed fewer arguments than there are parameters as long
// as the gap can be filled in by DV funclets.
for (auto i = fca.numArgs; i < numParams; ++i) {
auto const& param = callee->params()[i];
if (!param.hasDefaultValue() &&
(i < numParams - 1 || !callee->hasVariadicCaptureParam())) {
return refuse("callee called with too few arguments");
}
}
return true;
}
bool InliningDecider::canInlineAt(SrcKey callSK, const Func* callee,
const RegionDesc& region) const {
if (!RuntimeOption::RepoAuthoritative ||
!RuntimeOption::EvalHHIREnableGenTimeInlining) {
return false;
}
// If inlining was disabled... don't inline.
if (m_disabled) return false;
// TODO(#3331014): We have this hack until more ARM codegen is working.
if (arch() == Arch::ARM) return false;
// We can only inline at normal FCalls.
if (callSK.op() != Op::FCall &&
callSK.op() != Op::FCallD) {
return false;
}
// Don't inline from resumed functions. The inlining mechanism doesn't have
// support for these---it has no way to redefine stack pointers relative to
// the frame pointer, because in a resumed function the frame pointer points
// into the heap instead of into the eval stack.
if (callSK.resumed()) return false;
// TODO(#4238160): Inlining into pseudomain callsites is still buggy.
if (callSK.func()->isPseudoMain()) return false;
if (!isCalleeInlinable(callSK, callee) ||
!checkNumArgs(callSK, callee) ||
!checkFPIRegion(callSK, callee, region)) {
return false;
}
return true;
}