Add option to emit @llvm.trap as a function call instead of a trap instruction. rdar://9249183.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129107 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 330a781..7c456ed 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -72,6 +72,11 @@
cl::desc("Enable / disable ARM interworking (for debugging only)"),
cl::init(true));
+static cl::opt<std::string>
+TrapFuncName("arm-trap-func", cl::Hidden,
+ cl::desc("Emit a call to trap function rather than a trap instruction"),
+ cl::init(""));
+
void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
EVT PromotedBitwiseVT) {
if (VT != PromotedLdStVT) {
@@ -557,7 +562,10 @@
setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
- setOperationAction(ISD::TRAP, MVT::Other, Legal);
+ if (TrapFuncName.size())
+ setOperationAction(ISD::TRAP, MVT::Other, Custom);
+ else
+ setOperationAction(ISD::TRAP, MVT::Other, Legal);
// Use the default implementation.
setOperationAction(ISD::VASTART, MVT::Other, Custom);
@@ -4690,6 +4698,19 @@
return N0;
}
+static SDValue LowerTrap(SDValue Op, SelectionDAG &DAG) {
+ const TargetLowering &TLI = DAG.getTargetLoweringInfo();
+ TargetLowering::ArgListTy Args;
+ std::pair<SDValue, SDValue> CallResult =
+ TLI.LowerCallTo(Op.getOperand(0), Type::getVoidTy(*DAG.getContext()),
+ false, false, false, false, 0, CallingConv::C,
+ /*isTailCall=*/false,
+ /*isReturnValueUsed=*/true,
+ DAG.getExternalSymbol(TrapFuncName.c_str(), TLI.getPointerTy()),
+ Args, DAG, Op.getDebugLoc());
+ return CallResult.second;
+}
+
SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
default: llvm_unreachable("Don't know how to custom lower this!");
@@ -4736,6 +4757,7 @@
case ISD::MUL: return LowerMUL(Op, DAG);
case ISD::SDIV: return LowerSDIV(Op, DAG);
case ISD::UDIV: return LowerUDIV(Op, DAG);
+ case ISD::TRAP: return LowerTrap(Op, DAG);
}
return SDValue();
}