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Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
-rw-r--r--llvm/lib/Target/X86/X86ISelLowering.cpp30
1 files changed, 21 insertions, 9 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 6281124..7244a6d 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -5001,9 +5001,12 @@ static bool getTargetConstantBitsFromNode(SDValue Op, unsigned EltSizeInBits,
EVT VT = Op.getValueType();
unsigned SizeInBits = VT.getSizeInBits();
- assert((SizeInBits % EltSizeInBits) == 0 && "Can't split constant!");
unsigned NumElts = SizeInBits / EltSizeInBits;
+ // Can't split constant.
+ if ((SizeInBits % EltSizeInBits) != 0)
+ return false;
+
// Bitcast a source array of element bits to the target size.
auto CastBitData = [&](APInt &UndefSrcElts, ArrayRef<APInt> SrcEltBits) {
unsigned NumSrcElts = UndefSrcElts.getBitWidth();
@@ -45059,6 +45062,10 @@ bool X86TargetLowering::isGuaranteedNotToBeUndefOrPoisonForTargetNode(
unsigned NumElts = DemandedElts.getBitWidth();
switch (Op.getOpcode()) {
+ case X86ISD::GlobalBaseReg:
+ case X86ISD::Wrapper:
+ case X86ISD::WrapperRIP:
+ return true;
case X86ISD::BLENDI:
case X86ISD::PSHUFD:
case X86ISD::UNPCKL:
@@ -45098,27 +45105,34 @@ bool X86TargetLowering::canCreateUndefOrPoisonForTargetNode(
bool PoisonOnly, bool ConsiderFlags, unsigned Depth) const {
switch (Op.getOpcode()) {
+ // SSE vector insert/extracts use modulo indices.
+ case X86ISD::PINSRB:
+ case X86ISD::PINSRW:
+ case X86ISD::PEXTRB:
+ case X86ISD::PEXTRW:
+ return false;
// SSE vector multiplies are either inbounds or saturate.
case X86ISD::VPMADDUBSW:
case X86ISD::VPMADDWD:
+ return false;
// SSE vector shifts handle out of bounds shift amounts.
case X86ISD::VSHLI:
case X86ISD::VSRLI:
case X86ISD::VSRAI:
return false;
- // SSE blends.
+ // SSE blends.
case X86ISD::BLENDI:
case X86ISD::BLENDV:
return false;
- // SSE target shuffles.
+ // SSE target shuffles.
case X86ISD::PSHUFD:
case X86ISD::UNPCKL:
case X86ISD::UNPCKH:
case X86ISD::VPERMILPI:
case X86ISD::VPERMV3:
return false;
- // SSE comparisons handle all icmp/fcmp cases.
- // TODO: Add CMPM/MM with test coverage.
+ // SSE comparisons handle all icmp/fcmp cases.
+ // TODO: Add CMPM/MM with test coverage.
case X86ISD::CMPP:
case X86ISD::PCMPEQ:
case X86ISD::PCMPGT:
@@ -58060,11 +58074,9 @@ static SDValue combineX86CloadCstore(SDNode *N, SelectionDAG &DAG) {
// res, flags2 = sub 0, (and X, Y)
// cload/cstore ..., cond_ne, flag2
// ->
- // res, flags2 = and X, Y
+ // res, flags2 = cmp (and X, Y), 0
// cload/cstore ..., cond_ne, flag2
- Ops[4] = DAG.getNode(X86ISD::AND, DL, Sub->getVTList(), Op1.getOperand(0),
- Op1.getOperand(1))
- .getValue(1);
+ Ops[4] = DAG.getNode(X86ISD::CMP, DL, MVT::i32, Op1, Sub.getOperand(0));
} else {
return SDValue();
}