6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-13 04:38:24 +00:00
Code Issues Projects Releases Wiki Activity

SLP Vectorizer: Fix a bug in the code that does CSE on the generated gather sequences.

Browse Source 
Make sure that we don't replace and RAUW two sequences if one does not dominate the other.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184674 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2013-06-23 21:57:27 +00:00
parent 787ad64b98
commit 722b0a4d29
2 changed files with 61 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
lib/Transforms/Vectorize/SLPVectorizer.cpp
View File

@ -127,8 +127,9 @@ public:
static const int MAX_COST = INT_MIN;
FuncSLP(Function *Func, ScalarEvolution *Se, DataLayout *Dl,
TargetTransformInfo *Tti, AliasAnalysis *Aa, LoopInfo *Li) :
F(Func), SE(Se), DL(Dl), TTI(Tti), AA(Aa), LI(Li),
TargetTransformInfo *Tti, AliasAnalysis *Aa, LoopInfo *Li,
DominatorTree *Dt) :
F(Func), SE(Se), DL(Dl), TTI(Tti), AA(Aa), LI(Li), DT(Dt),
Builder(Se->getContext()) {
for (Function::iterator it = F->begin(), e = F->end(); it != e; ++it) {
BasicBlock *BB = it;
@ -255,6 +256,7 @@ public:
TargetTransformInfo *TTI;
AliasAnalysis *AA;
LoopInfo *LI;
DominatorTree *DT;
/// Instruction builder to construct the vectorized tree.
IRBuilder<> Builder;
};
@ -1197,7 +1199,8 @@ void FuncSLP::optimizeGatherSequence() {
// visited instructions.
for (SmallPtrSet<Instruction*, 16>::iterator v = Visited.begin(),
ve = Visited.end(); v != ve; ++v) {
if (Insert->isIdenticalTo(*v)) {
if (Insert->isIdenticalTo(*v) &&
DT->dominates((*v)->getParent(), Insert->getParent())) {
Insert->replaceAllUsesWith(*v);
break;
}
@ -1224,6 +1227,7 @@ struct SLPVectorizer : public FunctionPass {
TargetTransformInfo *TTI;
AliasAnalysis *AA;
LoopInfo *LI;
DominatorTree *DT;
virtual bool runOnFunction(Function &F) {
SE = &getAnalysis<ScalarEvolution>();
@ -1231,6 +1235,7 @@ struct SLPVectorizer : public FunctionPass {
TTI = &getAnalysis<TargetTransformInfo>();
AA = &getAnalysis<AliasAnalysis>();
LI = &getAnalysis<LoopInfo>();
DT = &getAnalysis<DominatorTree>();
StoreRefs.clear();
bool Changed = false;
@ -1244,7 +1249,7 @@ struct SLPVectorizer : public FunctionPass {
// Use the bollom up slp vectorizer to construct chains that start with
// he store instructions.
FuncSLP R(&F, SE, DL, TTI, AA, LI);
FuncSLP R(&F, SE, DL, TTI, AA, LI, DT);
for (Function::iterator it = F.begin(), e = F.end(); it != e; ++it) {
BasicBlock *BB = it;
@ -1274,6 +1279,7 @@ struct SLPVectorizer : public FunctionPass {
AU.addRequired<AliasAnalysis>();
AU.addRequired<TargetTransformInfo>();
AU.addRequired<LoopInfo>();
AU.addRequired<DominatorTree>();
}
private: