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[ARM] Factorize the calculation of WhichResult in isV*Mask. NFC.

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Differential Revision: https://reviews.llvm.org/D36930

llvm-svn: 311260
This commit is contained in:
Martin Storsjo 2017-08-19 20:26:51 +00:00
parent cf3269d236
commit 58bfe52e4f
1 changed files with 13 additions and 24 deletions
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37
lib/Target/ARM/ARMISelLowering.cpp
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@ -5800,6 +5800,13 @@ static bool isVTBLMask(ArrayRef<int> M, EVT VT) {
return VT == MVT::v8i8 && M.size() == 8;
}
static unsigned SelectPairHalf(unsigned Elements, ArrayRef<int> Mask,
unsigned Index) {
if (Mask.size() == Elements * 2)
return Index / Elements;
return Mask[Index] == 0 ? 0 : 1;
}
// Checks whether the shuffle mask represents a vector transpose (VTRN) by
// checking that pairs of elements in the shuffle mask represent the same index
// in each vector, incrementing the expected index by 2 at each step.
@ -5836,10 +5843,7 @@ static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
// element is undefined, e.g. [-1, 4, 2, 6] will be rejected, because only
// M[0] is used to determine WhichResult
for (unsigned i = 0; i < M.size(); i += NumElts) {
if (M.size() == NumElts * 2)
WhichResult = i / NumElts;
else
WhichResult = M[i] == 0 ? 0 : 1;
WhichResult = SelectPairHalf(NumElts, M, i);
for (unsigned j = 0; j < NumElts; j += 2) {
if ((M[i+j] >= 0 && (unsigned) M[i+j] != j + WhichResult) ||
(M[i+j+1] >= 0 && (unsigned) M[i+j+1] != j + NumElts + WhichResult))
@ -5866,10 +5870,7 @@ static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
return false;
for (unsigned i = 0; i < M.size(); i += NumElts) {
if (M.size() == NumElts * 2)
WhichResult = i / NumElts;
else
WhichResult = M[i] == 0 ? 0 : 1;
WhichResult = SelectPairHalf(NumElts, M, i);
for (unsigned j = 0; j < NumElts; j += 2) {
if ((M[i+j] >= 0 && (unsigned) M[i+j] != j + WhichResult) ||
(M[i+j+1] >= 0 && (unsigned) M[i+j+1] != j + WhichResult))
@ -5901,10 +5902,7 @@ static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
return false;
for (unsigned i = 0; i < M.size(); i += NumElts) {
if (M.size() == NumElts * 2)
WhichResult = i / NumElts;
else
WhichResult = M[i] == 0 ? 0 : 1;
WhichResult = SelectPairHalf(NumElts, M, i);
for (unsigned j = 0; j < NumElts; ++j) {
if (M[i+j] >= 0 && (unsigned) M[i+j] != 2 * j + WhichResult)
return false;
@ -5935,10 +5933,7 @@ static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
unsigned Half = NumElts / 2;
for (unsigned i = 0; i < M.size(); i += NumElts) {
if (M.size() == NumElts * 2)
WhichResult = i / NumElts;
else
WhichResult = M[i] == 0 ? 0 : 1;
WhichResult = SelectPairHalf(NumElts, M, i);
for (unsigned j = 0; j < NumElts; j += Half) {
unsigned Idx = WhichResult;
for (unsigned k = 0; k < Half; ++k) {
@ -5978,10 +5973,7 @@ static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
return false;
for (unsigned i = 0; i < M.size(); i += NumElts) {
if (M.size() == NumElts * 2)
WhichResult = i / NumElts;
else
WhichResult = M[i] == 0 ? 0 : 1;
WhichResult = SelectPairHalf(NumElts, M, i);
unsigned Idx = WhichResult * NumElts / 2;
for (unsigned j = 0; j < NumElts; j += 2) {
if ((M[i+j] >= 0 && (unsigned) M[i+j] != Idx) ||
@ -6014,10 +6006,7 @@ static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
return false;
for (unsigned i = 0; i < M.size(); i += NumElts) {
if (M.size() == NumElts * 2)
WhichResult = i / NumElts;
else
WhichResult = M[i] == 0 ? 0 : 1;
WhichResult = SelectPairHalf(NumElts, M, i);
unsigned Idx = WhichResult * NumElts / 2;
for (unsigned j = 0; j < NumElts; j += 2) {
if ((M[i+j] >= 0 && (unsigned) M[i+j] != Idx) ||