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Add option to emit @llvm.trap as a function call instead of a trap instruction. rdar://9249183.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129107 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2011-04-07 20:31:12 +00:00
parent ce8463f1fb
commit 274d8d4eba
2 changed files with 31 additions and 4 deletions
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24
lib/Target/ARM/ARMISelLowering.cpp
View File

@ -72,6 +72,11 @@ ARMInterworking("arm-interworking", cl::Hidden,
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 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
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 @@ static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
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 @@ SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
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();
}

11
test/CodeGen/ARM/trap.ll
View File

@ -1,10 +1,15 @@
; RUN: llc < %s -march=arm | FileCheck %s
; RUN: llc < %s -mtriple=arm-apple-darwin | FileCheck %s -check-prefix=INSTR
; RUN: llc < %s -mtriple=arm-apple-darwin -arm-trap-func=_trap | FileCheck %s -check-prefix=FUNC
; rdar://7961298
; rdar://9249183
define void @t() nounwind {
entry:
; CHECK: t:
; CHECK: trap
; INSTR: t:
; INSTR: trap
; FUNC: t:
; FUNC: bl __trap
call void @llvm.trap()
unreachable
}