Add support for GCC compatible builtin setjmp and longjmp intrinsics. This is
a supporting preliminary patch for GCC-compatible SjLJ exception handling. Note that these intrinsics are not designed to be invoked directly by the user, but
rather used by the front-end as target hooks for exception handling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71610 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index b340d0c..cecd529 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -3849,6 +3849,12 @@
case Intrinsic::longjmp:
return "_longjmp"+!TLI.usesUnderscoreLongJmp();
break;
+ case Intrinsic::builtinsetjmp:
+ // Mark this function has using builtin_setjmp so context gets preserved
+ DAG.getMachineFunction().setHasBuiltinSetjmp(true);
+ // Turn it into a target intrinsic node for the codegen
+ visitTargetIntrinsic(I, Intrinsic);
+ return 0;
case Intrinsic::memcpy: {
SDValue Op1 = getValue(I.getOperand(1));
SDValue Op2 = getValue(I.getOperand(2));