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author | Duncan Sands <baldrick@free.fr> | 2009-10-13 21:04:12 +0000 |
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committer | Duncan Sands <baldrick@free.fr> | 2009-10-13 21:04:12 +0000 |
commit | 3a66a68b0cc81193abfc074b1d360a4950151d38 (patch) | |
tree | ce5aaed17ab826e9245fcbe8bd389b21467b7063 /lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | |
parent | b408b15fa423d4c3c1d4840ff6378af17f6f293b (diff) | |
download | llvm-3a66a68b0cc81193abfc074b1d360a4950151d38.tar.gz llvm-3a66a68b0cc81193abfc074b1d360a4950151d38.tar.bz2 llvm-3a66a68b0cc81193abfc074b1d360a4950151d38.tar.xz |
Introduce new convenience methods for sign extending or
truncating an SDValue (depending on whether the target
type is bigger or smaller than the value's type); or zero
extending or truncating it. Use it in a few places (this
seems to be a popular operation, but I only modified cases
of it in SelectionDAGBuild). In particular, the eh_selector
lowering was doing this wrong due to a repeated rather than
inverted test, fixed with this change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84027 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | 64 |
1 files changed, 10 insertions, 54 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp index aa4ae733c2..0d9b2cef97 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp @@ -1429,12 +1429,7 @@ void SelectionDAGLowering::visitJumpTableHeader(JumpTable &JT, // can be used as an index into the jump table in a subsequent basic block. // This value may be smaller or larger than the target's pointer type, and // therefore require extension or truncating. - if (VT.bitsGT(TLI.getPointerTy())) - SwitchOp = DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), - TLI.getPointerTy(), SUB); - else - SwitchOp = DAG.getNode(ISD::ZERO_EXTEND, getCurDebugLoc(), - TLI.getPointerTy(), SUB); + SwitchOp = DAG.getZExtOrTrunc(SUB, getCurDebugLoc(), TLI.getPointerTy()); unsigned JumpTableReg = FuncInfo.MakeReg(TLI.getPointerTy()); SDValue CopyTo = DAG.getCopyToReg(getControlRoot(), getCurDebugLoc(), @@ -1482,13 +1477,7 @@ void SelectionDAGLowering::visitBitTestHeader(BitTestBlock &B) { SUB, DAG.getConstant(B.Range, VT), ISD::SETUGT); - SDValue ShiftOp; - if (VT.bitsGT(TLI.getPointerTy())) - ShiftOp = DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), - TLI.getPointerTy(), SUB); - else - ShiftOp = DAG.getNode(ISD::ZERO_EXTEND, getCurDebugLoc(), - TLI.getPointerTy(), SUB); + SDValue ShiftOp = DAG.getZExtOrTrunc(SUB, getCurDebugLoc(), TLI.getPointerTy()); B.Reg = FuncInfo.MakeReg(TLI.getPointerTy()); SDValue CopyTo = DAG.getCopyToReg(getControlRoot(), getCurDebugLoc(), @@ -2336,12 +2325,7 @@ void SelectionDAGLowering::visitPtrToInt(User &I) { SDValue N = getValue(I.getOperand(0)); EVT SrcVT = N.getValueType(); EVT DestVT = TLI.getValueType(I.getType()); - SDValue Result; - if (DestVT.bitsLT(SrcVT)) - Result = DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), DestVT, N); - else - // Note: ZERO_EXTEND can handle cases where the sizes are equal too - Result = DAG.getNode(ISD::ZERO_EXTEND, getCurDebugLoc(), DestVT, N); + SDValue Result = DAG.getZExtOrTrunc(N, getCurDebugLoc(), DestVT); setValue(&I, Result); } @@ -2351,12 +2335,7 @@ void SelectionDAGLowering::visitIntToPtr(User &I) { SDValue N = getValue(I.getOperand(0)); EVT SrcVT = N.getValueType(); EVT DestVT = TLI.getValueType(I.getType()); - if (DestVT.bitsLT(SrcVT)) - setValue(&I, DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), DestVT, N)); - else - // Note: ZERO_EXTEND can handle cases where the sizes are equal too - setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, getCurDebugLoc(), - DestVT, N)); + setValue(&I, DAG.getZExtOrTrunc(N, getCurDebugLoc(), DestVT)); } void SelectionDAGLowering::visitBitCast(User &I) { @@ -2692,12 +2671,7 @@ void SelectionDAGLowering::visitGetElementPtr(User &I) { // If the index is smaller or larger than intptr_t, truncate or extend // it. - if (IdxN.getValueType().bitsLT(N.getValueType())) - IdxN = DAG.getNode(ISD::SIGN_EXTEND, getCurDebugLoc(), - N.getValueType(), IdxN); - else if (IdxN.getValueType().bitsGT(N.getValueType())) - IdxN = DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), - N.getValueType(), IdxN); + IdxN = DAG.getSExtOrTrunc(IdxN, getCurDebugLoc(), N.getValueType()); // If this is a multiply by a power of two, turn it into a shl // immediately. This is a very common case. @@ -2742,12 +2716,7 @@ void SelectionDAGLowering::visitAlloca(AllocaInst &I) { EVT IntPtr = TLI.getPointerTy(); - if (IntPtr.bitsLT(AllocSize.getValueType())) - AllocSize = DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), - IntPtr, AllocSize); - else if (IntPtr.bitsGT(AllocSize.getValueType())) - AllocSize = DAG.getNode(ISD::ZERO_EXTEND, getCurDebugLoc(), - IntPtr, AllocSize); + AllocSize = DAG.getZExtOrTrunc(AllocSize, getCurDebugLoc(), IntPtr); // Handle alignment. If the requested alignment is less than or equal to // the stack alignment, ignore it. If the size is greater than or equal to @@ -4030,12 +3999,7 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { MVT::SimpleValueType VT = (Intrinsic == Intrinsic::eh_selector_i32 ? MVT::i32 : MVT::i64); - if (Op.getValueType().getSimpleVT() < VT) - Op = DAG.getNode(ISD::SIGN_EXTEND, dl, VT, Op); - else if (Op.getValueType().getSimpleVT() < VT) - Op = DAG.getNode(ISD::TRUNCATE, dl, VT, Op); - - setValue(&I, Op); + setValue(&I, DAG.getSExtOrTrunc(Op, dl, VT)); return 0; } @@ -4082,13 +4046,8 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { case Intrinsic::eh_dwarf_cfa: { EVT VT = getValue(I.getOperand(1)).getValueType(); - SDValue CfaArg; - if (VT.bitsGT(TLI.getPointerTy())) - CfaArg = DAG.getNode(ISD::TRUNCATE, dl, - TLI.getPointerTy(), getValue(I.getOperand(1))); - else - CfaArg = DAG.getNode(ISD::SIGN_EXTEND, dl, - TLI.getPointerTy(), getValue(I.getOperand(1))); + SDValue CfaArg = DAG.getSExtOrTrunc(getValue(I.getOperand(1)), dl, + TLI.getPointerTy()); SDValue Offset = DAG.getNode(ISD::ADD, dl, TLI.getPointerTy(), @@ -5552,10 +5511,7 @@ void SelectionDAGLowering::visitMalloc(MallocInst &I) { EVT IntPtr = TLI.getPointerTy(); - if (IntPtr.bitsLT(Src.getValueType())) - Src = DAG.getNode(ISD::TRUNCATE, getCurDebugLoc(), IntPtr, Src); - else if (IntPtr.bitsGT(Src.getValueType())) - Src = DAG.getNode(ISD::ZERO_EXTEND, getCurDebugLoc(), IntPtr, Src); + Src = DAG.getZExtOrTrunc(Src, getCurDebugLoc(), IntPtr); TargetLowering::ArgListTy Args; TargetLowering::ArgListEntry Entry; |