[fast-isel] Add support for ADDs with non-legal types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149934 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 79c447a..1291303 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -160,7 +160,8 @@
bool SelectCmp(const Instruction *I);
bool SelectFPExt(const Instruction *I);
bool SelectFPTrunc(const Instruction *I);
- bool SelectBinaryOp(const Instruction *I, unsigned ISDOpcode);
+ bool SelectBinaryIntOp(const Instruction *I, unsigned ISDOpcode);
+ bool SelectBinaryFPOp(const Instruction *I, unsigned ISDOpcode);
bool SelectIToFP(const Instruction *I, bool isSigned);
bool SelectFPToI(const Instruction *I, bool isSigned);
bool SelectDiv(const Instruction *I, bool isSigned);
@@ -1722,7 +1723,33 @@
return ARMEmitLibcall(I, LC);
}
-bool ARMFastISel::SelectBinaryOp(const Instruction *I, unsigned ISDOpcode) {
+bool ARMFastISel::SelectBinaryIntOp(const Instruction *I, unsigned ISDOpcode) {
+ assert (ISDOpcode == ISD::ADD && "Expected an add.");
+ EVT DestVT = TLI.getValueType(I->getType(), true);
+
+ // We can get here in the case when we have a binary operation on a non-legal
+ // type and the target independent selector doesn't know how to handle it.
+ if (DestVT != MVT::i16 && DestVT != MVT::i8 && DestVT != MVT::i1)
+ return false;
+
+ unsigned SrcReg1 = getRegForValue(I->getOperand(0));
+ if (SrcReg1 == 0) return false;
+
+ // TODO: Often the 2nd operand is an immediate, which can be encoded directly
+ // in the instruction, rather then materializing the value in a register.
+ unsigned SrcReg2 = getRegForValue(I->getOperand(1));
+ if (SrcReg2 == 0) return false;
+
+ unsigned Opc = isThumb2 ? ARM::t2ADDrr : ARM::ADDrr;
+ unsigned ResultReg = createResultReg(TLI.getRegClassFor(MVT::i32));
+ AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
+ TII.get(Opc), ResultReg)
+ .addReg(SrcReg1).addReg(SrcReg2));
+ UpdateValueMap(I, ResultReg);
+ return true;
+}
+
+bool ARMFastISel::SelectBinaryFPOp(const Instruction *I, unsigned ISDOpcode) {
EVT VT = TLI.getValueType(I->getType(), true);
// We can get here in the case when we want to use NEON for our fp
@@ -2458,12 +2485,14 @@
return SelectFPToI(I, /*isSigned*/ true);
case Instruction::FPToUI:
return SelectFPToI(I, /*isSigned*/ false);
+ case Instruction::Add:
+ return SelectBinaryIntOp(I, ISD::ADD);
case Instruction::FAdd:
- return SelectBinaryOp(I, ISD::FADD);
+ return SelectBinaryFPOp(I, ISD::FADD);
case Instruction::FSub:
- return SelectBinaryOp(I, ISD::FSUB);
+ return SelectBinaryFPOp(I, ISD::FSUB);
case Instruction::FMul:
- return SelectBinaryOp(I, ISD::FMUL);
+ return SelectBinaryFPOp(I, ISD::FMUL);
case Instruction::SDiv:
return SelectDiv(I, /*isSigned*/ true);
case Instruction::UDiv: