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Reverse the 'if' condition and reduce the indentation.

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llvm-svn: 171172
This commit is contained in:
Nadav Rotem 2012-12-27 23:08:05 +00:00
parent e2fd2d2c63
commit 6850870c3f
1 changed files with 28 additions and 29 deletions
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57
lib/Target/X86/X86ISelLowering.cpp
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@ -9549,45 +9549,44 @@ SDValue X86TargetLowering::LowerSIGN_EXTEND(SDValue Op,
EVT InVT = In.getValueType();
DebugLoc dl = Op->getDebugLoc();
if ((VT == MVT::v4i64 && InVT == MVT::v4i32) ||
(VT == MVT::v8i32 && InVT == MVT::v8i16)) {
if ((VT != MVT::v4i64 || InVT != MVT::v4i32) &&
(VT != MVT::v8i32 || InVT != MVT::v8i16))
return SDValue();
if (Subtarget->hasInt256())
return DAG.getNode(X86ISD::VSEXT_MOVL, dl, VT, In);
if (Subtarget->hasInt256())
return DAG.getNode(X86ISD::VSEXT_MOVL, dl, VT, In);
// Optimize vectors in AVX mode
// Sign extend v8i16 to v8i32 and
// v4i32 to v4i64
//
// Divide input vector into two parts
// for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
// use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
// concat the vectors to original VT
// Optimize vectors in AVX mode
// Sign extend v8i16 to v8i32 and
// v4i32 to v4i64
//
// Divide input vector into two parts
// for v4i32 the shuffle mask will be { 0, 1, -1, -1} {2, 3, -1, -1}
// use vpmovsx instruction to extend v4i32 -> v2i64; v8i16 -> v4i32
// concat the vectors to original VT
unsigned NumElems = InVT.getVectorNumElements();
SDValue Undef = DAG.getUNDEF(InVT);
unsigned NumElems = InVT.getVectorNumElements();
SDValue Undef = DAG.getUNDEF(InVT);
SmallVector<int,8> ShufMask1(NumElems, -1);
for (unsigned i = 0; i != NumElems/2; ++i)
ShufMask1[i] = i;
SmallVector<int,8> ShufMask1(NumElems, -1);
for (unsigned i = 0; i != NumElems/2; ++i)
ShufMask1[i] = i;
SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
SDValue OpLo = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask1[0]);
SmallVector<int,8> ShufMask2(NumElems, -1);
for (unsigned i = 0; i != NumElems/2; ++i)
ShufMask2[i] = i + NumElems/2;
SmallVector<int,8> ShufMask2(NumElems, -1);
for (unsigned i = 0; i != NumElems/2; ++i)
ShufMask2[i] = i + NumElems/2;
SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
SDValue OpHi = DAG.getVectorShuffle(InVT, dl, In, Undef, &ShufMask2[0]);
EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
VT.getVectorNumElements()/2);
EVT HalfVT = EVT::getVectorVT(*DAG.getContext(), VT.getScalarType(),
VT.getVectorNumElements()/2);
OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
OpLo = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpLo);
OpHi = DAG.getNode(X86ISD::VSEXT_MOVL, dl, HalfVT, OpHi);
return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
}
return SDValue();
return DAG.getNode(ISD::CONCAT_VECTORS, dl, VT, OpLo, OpHi);
}
// isAndOrOfSingleUseSetCCs - Return true if node is an ISD::AND or