[StackMaps] Mark in CallLoweringInfo when lowering a patchpoint
While, generally speaking, the process of lowering arguments for a patchpoint
is the same as lowering a regular indirect call, on some targets it may not be
exactly the same. Targets may not, for example, want to add additional register
dependencies that apply only to making cross-DSO calls through linker stubs,
may not want to load additional registers out of function descriptors, and may
not want to add additional side-effect-causing instructions that cannot be
removed later with the call itself being generated.
The PowerPC target will use this in a future commit (for all of the reasons
stated above).
llvm-svn: 225806
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 068a5c4..151bc72 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -7023,7 +7023,8 @@
SelectionDAGBuilder::lowerCallOperands(ImmutableCallSite CS, unsigned ArgIdx,
unsigned NumArgs, SDValue Callee,
bool UseVoidTy,
- MachineBasicBlock *LandingPad) {
+ MachineBasicBlock *LandingPad,
+ bool IsPatchPoint) {
TargetLowering::ArgListTy Args;
Args.reserve(NumArgs);
@@ -7046,7 +7047,7 @@
TargetLowering::CallLoweringInfo CLI(DAG);
CLI.setDebugLoc(getCurSDLoc()).setChain(getRoot())
.setCallee(CS.getCallingConv(), retTy, Callee, std::move(Args), NumArgs)
- .setDiscardResult(CS->use_empty());
+ .setDiscardResult(CS->use_empty()).setIsPatchPoint(IsPatchPoint);
return lowerInvokable(CLI, LandingPad);
}
@@ -7178,7 +7179,7 @@
unsigned NumCallArgs = IsAnyRegCC ? 0 : NumArgs;
std::pair<SDValue, SDValue> Result =
lowerCallOperands(CS, NumMetaOpers, NumCallArgs, Callee, IsAnyRegCC,
- LandingPad);
+ LandingPad, true);
SDNode *CallEnd = Result.second.getNode();
if (HasDef && (CallEnd->getOpcode() == ISD::CopyFromReg))