RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-12-02 08:26:29 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[Hexagon] Convert HVX vector constants of i1 to i8

Browse Source 
Certain operations require vector of i1 values. However, for Hexagon
architecture compatibility, they need to be represented as vector of i8.

Patch by Suyog Sarda.

llvm-svn: 309677
This commit is contained in:
Krzysztof Parzyszek 2017-08-01 13:12:53 +00:00
parent aefa20c864
commit cfa276ba08
2 changed files with 53 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
lib/Target/Hexagon/HexagonISelLowering.cpp
View File

@ -1364,10 +1364,44 @@ HexagonTargetLowering::LowerVSELECT(SDValue Op, SelectionDAG &DAG) const {
return SDValue();
}
static Constant *convert_i1_to_i8(const Constant *ConstVal) {
SmallVector<Constant *, 128> NewConst;
const ConstantVector *CV = dyn_cast<ConstantVector>(ConstVal);
if (!CV)
return nullptr;
LLVMContext &Ctx = ConstVal->getContext();
IRBuilder<> IRB(Ctx);
unsigned NumVectorElements = CV->getNumOperands();
assert(isPowerOf2_32(NumVectorElements) &&
"conversion only supported for pow2 VectorSize!");
for (unsigned i = 0; i < NumVectorElements / 8; ++i) {
uint8_t x = 0;
for (unsigned j = 0; j < 8; ++j) {
uint8_t y = CV->getOperand(i * 8 + j)->getUniqueInteger().getZExtValue();
x |= y << (7 - j);
}
assert((x == 0 || x == 255) && "Either all 0's or all 1's expected!");
NewConst.push_back(IRB.getInt8(x));
}
return ConstantVector::get(NewConst);
}
SDValue
HexagonTargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
EVT ValTy = Op.getValueType();
ConstantPoolSDNode *CPN = cast<ConstantPoolSDNode>(Op);
Constant *CVal = nullptr;
bool isVTi1Type = false;
if (const Constant *ConstVal = dyn_cast<Constant>(CPN->getConstVal())) {
Type *CValTy = ConstVal->getType();
if (CValTy->isVectorTy() &&
CValTy->getVectorElementType()->isIntegerTy(1)) {
CVal = convert_i1_to_i8(ConstVal);
isVTi1Type = (CVal != nullptr);
}
}
unsigned Align = CPN->getAlignment();
bool IsPositionIndependent = isPositionIndependent();
unsigned char TF = IsPositionIndependent ? HexagonII::MO_PCREL : 0;
@ -1377,6 +1411,8 @@ HexagonTargetLowering::LowerConstantPool(SDValue Op, SelectionDAG &DAG) const {
if (CPN->isMachineConstantPoolEntry())
T = DAG.getTargetConstantPool(CPN->getMachineCPVal(), ValTy, Align, Offset,
TF);
else if (isVTi1Type)
T = DAG.getTargetConstantPool(CVal, ValTy, Align, Offset, TF);
else
T = DAG.getTargetConstantPool(CPN->getConstVal(), ValTy, Align, Offset,
TF);

17
test/CodeGen/Hexagon/convert_const_i1_to_i8.ll Normal file
View File

File diff suppressed because one or more lines are too long