Create and use an llvm.eh.sjlj.functioncontext intrinsic.
This intrinsic is used to pass the index of the function context to the back-end
for further processing. The back-end is in charge of filling in the rest of the
entries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140676 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 9d86c75..b2b93c9 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4754,6 +4754,14 @@
MMI.setCurrentCallSite(CI->getZExtValue());
return 0;
}
+ case Intrinsic::eh_sjlj_functioncontext: {
+ // Get and store the index of the function context.
+ MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+ AllocaInst *FnCtx = cast<AllocaInst>(I.getArgOperand(0));
+ int FI = FuncInfo.StaticAllocaMap[FnCtx];
+ MFI->setFunctionContextIndex(FI);
+ return 0;
+ }
case Intrinsic::eh_sjlj_setjmp: {
setValue(&I, DAG.getNode(ISD::EH_SJLJ_SETJMP, dl, MVT::i32, getRoot(),
getValue(I.getArgOperand(0))));
diff --git a/lib/CodeGen/SjLjEHPrepare.cpp b/lib/CodeGen/SjLjEHPrepare.cpp
index baa70b9..9749a7e 100644
--- a/lib/CodeGen/SjLjEHPrepare.cpp
+++ b/lib/CodeGen/SjLjEHPrepare.cpp
@@ -721,6 +721,12 @@
AllocaInst *FuncCtx =
new AllocaInst(FunctionContextTy, 0, Align, "fn_context", EntryBB->begin());
+ // Store a pointer to the function context so that the back-end will know
+ // where to look for it.
+ CallInst::Create(Intrinsic::getDeclaration(F.getParent(),
+ Intrinsic::eh_sjlj_functioncontext),
+ FuncCtx, "", EntryBB->getTerminator());
+
// Fill in the function context structure.
Value *Idxs[2];
Type *Int32Ty = Type::getInt32Ty(F.getContext());