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path: root/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
-rw-r--r--lib/CodeGen/SelectionDAG/DAGCombiner.cpp76
1 files changed, 34 insertions, 42 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index d6379dc858..06a1f0dd21 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -503,8 +503,6 @@ SDOperand DAGCombiner::visit(SDNode *N) {
case ISD::BRCOND: return visitBRCOND(N);
case ISD::BR_CC: return visitBR_CC(N);
case ISD::LOAD: return visitLOAD(N);
- // FIXME - Switch over after StoreSDNode comes online.
- case ISD::TRUNCSTORE: // Fall thru
case ISD::STORE: return visitSTORE(N);
case ISD::INSERT_VECTOR_ELT: return visitINSERT_VECTOR_ELT(N);
case ISD::VINSERT_VECTOR_ELT: return visitVINSERT_VECTOR_ELT(N);
@@ -2687,9 +2685,12 @@ SDOperand DAGCombiner::visitLOAD(SDNode *N) {
// TODO: Handle store large -> read small portion.
// TODO: Handle TRUNCSTORE/LOADEXT
if (LD->getExtensionType() == ISD::NON_EXTLOAD) {
- if (Chain.getOpcode() == ISD::STORE && Chain.getOperand(2) == Ptr &&
- Chain.getOperand(1).getValueType() == N->getValueType(0))
+ if (ISD::isNON_TRUNCStore(Chain.Val)) {
+ StoreSDNode *PrevST = cast<StoreSDNode>(Chain);
+ if (PrevST->getBasePtr() == Ptr &&
+ PrevST->getValue().getValueType() == N->getValueType(0))
return CombineTo(N, Chain.getOperand(1), Chain);
+ }
}
if (CombinerAA) {
@@ -2725,13 +2726,13 @@ SDOperand DAGCombiner::visitLOAD(SDNode *N) {
}
SDOperand DAGCombiner::visitSTORE(SDNode *N) {
- SDOperand Chain = N->getOperand(0);
- SDOperand Value = N->getOperand(1);
- SDOperand Ptr = N->getOperand(2);
- SDOperand SrcValue = N->getOperand(3);
+ StoreSDNode *ST = cast<StoreSDNode>(N);
+ SDOperand Chain = ST->getChain();
+ SDOperand Value = ST->getValue();
+ SDOperand Ptr = ST->getBasePtr();
// FIXME - Switch over after StoreSDNode comes online.
- if (N->getOpcode() == ISD::TRUNCSTORE) {
+ if (ST->isTruncatingStore()) {
if (CombinerAA) {
// Walk up chain skipping non-aliasing memory nodes.
SDOperand BetterChain = FindBetterChain(N, Chain);
@@ -2739,9 +2740,9 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
// If there is a better chain.
if (Chain != BetterChain) {
// Replace the chain to avoid dependency.
- SDOperand ReplTStore = DAG.getNode(ISD::TRUNCSTORE, MVT::Other,
- BetterChain, Value, Ptr, SrcValue,
- N->getOperand(4));
+ SDOperand ReplTStore =
+ DAG.getTruncStore(BetterChain, Value, Ptr, ST->getSrcValue(),
+ ST->getSrcValueOffset(), ST->getStoredVT());
// Create token to keep both nodes around.
return DAG.getNode(ISD::TokenFactor, MVT::Other, Chain, ReplTStore);
@@ -2752,27 +2753,30 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
}
// If this is a store that kills a previous store, remove the previous store.
- if (Chain.getOpcode() == ISD::STORE && Chain.getOperand(2) == Ptr &&
- Chain.Val->hasOneUse() /* Avoid introducing DAG cycles */ &&
- // Make sure that these stores are the same value type:
- // FIXME: we really care that the second store is >= size of the first.
- Value.getValueType() == Chain.getOperand(1).getValueType()) {
- // Create a new store of Value that replaces both stores.
- SDNode *PrevStore = Chain.Val;
- if (PrevStore->getOperand(1) == Value) // Same value multiply stored.
- return Chain;
- SDOperand NewStore = DAG.getStore(PrevStore->getOperand(0), Value, Ptr,
- SrcValue);
- CombineTo(N, NewStore); // Nuke this store.
- CombineTo(PrevStore, NewStore); // Nuke the previous store.
- return SDOperand(N, 0);
+ if (ISD::isNON_TRUNCStore(Chain.Val)) {
+ StoreSDNode *PrevST = cast<StoreSDNode>(Chain);
+ if (PrevST->getBasePtr() == Ptr &&
+ Chain.Val->hasOneUse() /* Avoid introducing DAG cycles */ &&
+ // Make sure that these stores are the same value type:
+ // FIXME: we really care that the second store is >= size of the first.
+ Value.getValueType() == PrevST->getValue().getValueType()) {
+ // Create a new store of Value that replaces both stores.
+ if (PrevST->getValue() == Value) // Same value multiply stored.
+ return Chain;
+ SDOperand NewStore = DAG.getStore(PrevST->getChain(), Value, Ptr,
+ ST->getSrcValue(), ST->getSrcValueOffset());
+ CombineTo(N, NewStore); // Nuke this store.
+ CombineTo(Chain.Val, NewStore); // Nuke the previous store.
+ return SDOperand(N, 0);
+ }
}
// If this is a store of a bit convert, store the input value.
// FIXME: This needs to know that the resultant store does not need a
// higher alignment than the original.
if (0 && Value.getOpcode() == ISD::BIT_CONVERT) {
- return DAG.getStore(Chain, Value.getOperand(0), Ptr, SrcValue);
+ return DAG.getStore(Chain, Value.getOperand(0), Ptr, ST->getSrcValue(),
+ ST->getSrcValueOffset());
}
if (CombinerAA) {
@@ -2789,7 +2793,8 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
// If there is a better chain.
if (Chain != BetterChain) {
// Replace the chain to avoid dependency.
- SDOperand ReplStore = DAG.getStore(BetterChain, Value, Ptr, SrcValue);
+ SDOperand ReplStore = DAG.getStore(BetterChain, Value, Ptr,
+ ST->getSrcValue(), ST->getSrcValueOffset());
// Create token to keep both nodes around.
return DAG.getNode(ISD::TokenFactor, MVT::Other, Chain, ReplStore);
}
@@ -4050,20 +4055,9 @@ bool DAGCombiner::FindAliasInfo(SDNode *N,
SrcValue = LD->getSrcValue();
return true;
} else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
-#if 1 // FIXME - Switch over after StoreSDNode comes online.
- Ptr = ST->getOperand(2);
- Size = MVT::getSizeInBits(ST->getOperand(1).getValueType()) >> 3;
- SrcValue = 0;
-#else
Ptr = ST->getBasePtr();
- Size = MVT::getSizeInBits(ST->getOperand(1).getValueType()) >> 3;
+ Size = MVT::getSizeInBits(ST->getStoredVT()) >> 3;
SrcValue = ST->getSrcValue();
-#endif
- // FIXME - Switch over after StoreSDNode comes online.
- } else if (N->getOpcode() == ISD::TRUNCSTORE) {
- Ptr = N->getOperand(2);
- Size = MVT::getSizeInBits(cast<VTSDNode>(N->getOperand(4))->getVT()) >> 3;
- SrcValue = 0;
} else {
assert(0 && "FindAliasInfo expected a memory operand");
}
@@ -4104,8 +4098,6 @@ void DAGCombiner::GatherAllAliases(SDNode *N, SDOperand OriginalChain,
break;
case ISD::LOAD:
- // FIXME - Switch over after StoreSDNode comes online.
- case ISD::TRUNCSTORE:
case ISD::STORE: {
// Get alias information for Chain.
SDOperand OpPtr;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-09-29 12:57:33 +0000