Adjust isConstantSplat to allow for big-endian targets.
PPC is such a target; make it work.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87060 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index d9c273d..4530ffc 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -5916,7 +5916,8 @@
APInt &SplatUndef,
unsigned &SplatBitSize,
bool &HasAnyUndefs,
- unsigned MinSplatBits) {
+ unsigned MinSplatBits,
+ bool isBigEndian) {
EVT VT = getValueType(0);
assert(VT.isVector() && "Expected a vector type");
unsigned sz = VT.getSizeInBits();
@@ -5933,12 +5934,14 @@
unsigned int nOps = getNumOperands();
assert(nOps > 0 && "isConstantSplat has 0-size build vector");
unsigned EltBitSize = VT.getVectorElementType().getSizeInBits();
- for (unsigned i = 0; i < nOps; ++i) {
+
+ for (unsigned j = 0; j < nOps; ++j) {
+ unsigned i = isBigEndian ? nOps-1-j : j;
SDValue OpVal = getOperand(i);
- unsigned BitPos = i * EltBitSize;
+ unsigned BitPos = j * EltBitSize;
if (OpVal.getOpcode() == ISD::UNDEF)
- SplatUndef |= APInt::getBitsSet(sz, BitPos, BitPos +EltBitSize);
+ SplatUndef |= APInt::getBitsSet(sz, BitPos, BitPos + EltBitSize);
else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal))
SplatValue |= (APInt(CN->getAPIntValue()).zextOrTrunc(EltBitSize).
zextOrTrunc(sz) << BitPos);