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Add alignment value to allowsUnalignedMemoryAccess

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Rename to allowsMisalignedMemoryAccess.

On R600, 8 and 16 byte accesses are mostly OK with 4-byte alignment,
and don't need to be split into multiple accesses. Vector loads with
an alignment of the element type are not uncommon in OpenCL code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214055 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault
2014-07-27 17:46:40 +00:00
parent 54a7f7f9e0
commit 2dd264c8a3
23 changed files with 112 additions and 66 deletions
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12
lib/Target/XCore/XCoreISelLowering.cpp
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@@ -426,7 +426,9 @@ LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
assert(LD->getExtensionType() == ISD::NON_EXTLOAD &&
"Unexpected extension type");
assert(LD->getMemoryVT() == MVT::i32 && "Unexpected load EVT");
if (allowsUnalignedMemoryAccesses(LD->getMemoryVT()))
if (allowsMisalignedMemoryAccesses(LD->getMemoryVT(),
LD->getAddressSpace(),
LD->getAlignment()))
return SDValue();
unsigned ABIAlignment = getDataLayout()->
@@ -504,7 +506,9 @@ LowerSTORE(SDValue Op, SelectionDAG &DAG) const
StoreSDNode *ST = cast<StoreSDNode>(Op);
assert(!ST->isTruncatingStore() && "Unexpected store type");
assert(ST->getMemoryVT() == MVT::i32 && "Unexpected store EVT");
if (allowsUnalignedMemoryAccesses(ST->getMemoryVT())) {
if (allowsMisalignedMemoryAccesses(ST->getMemoryVT(),
ST->getAddressSpace(),
ST->getAlignment())) {
return SDValue();
}
unsigned ABIAlignment = getDataLayout()->
@@ -1803,7 +1807,9 @@ SDValue XCoreTargetLowering::PerformDAGCombine(SDNode *N,
// Replace unaligned store of unaligned load with memmove.
StoreSDNode *ST = cast<StoreSDNode>(N);
if (!DCI.isBeforeLegalize() ||
allowsUnalignedMemoryAccesses(ST->getMemoryVT()) ||
allowsMisalignedMemoryAccesses(ST->getMemoryVT(),
ST->getAddressSpace(),
ST->getAlignment()) ||
ST->isVolatile() || ST->isIndexed()) {
break;
}