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Switch these to using ETForest instead of DominatorSet to compute itself.

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Patch written by Daniel Berlin!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25202 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-11 05:10:20 +00:00
parent 19ef3d5be2
commit 88cac3d2f7
2 changed files with 11 additions and 10 deletions
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6
lib/Transforms/Scalar/GCSE.cpp
View File

@ -45,7 +45,7 @@ namespace {
// This transformation requires dominator and immediate dominator info
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
AU.addRequired<DominatorSet>();
AU.addRequired<ETForest>();
AU.addRequired<DominatorTree>();
AU.addRequired<ValueNumbering>();
}
@ -64,7 +64,7 @@ bool GCSE::runOnFunction(Function &F) {
bool Changed = false;
// Get pointers to the analysis results that we will be using...
DominatorSet &DS = getAnalysis<DominatorSet>();
ETForest &EF = getAnalysis<ETForest>();
ValueNumbering &VN = getAnalysis<ValueNumbering>();
DominatorTree &DT = getAnalysis<DominatorTree>();
@ -141,7 +141,7 @@ bool GCSE::runOnFunction(Function &F) {
if (OtherI->getParent() == BB)
Dominates = BlockInsts.count(OtherI);
else
Dominates = DS.dominates(OtherI->getParent(), BB);
Dominates = EF.dominates(OtherI->getParent(), BB);
if (Dominates) {
// Okay, we found an instruction with the same value as this one

15
lib/Transforms/Scalar/LoopStrengthReduce.cpp
View File

@ -77,7 +77,7 @@ namespace {
class LoopStrengthReduce : public FunctionPass {
LoopInfo *LI;
DominatorSet *DS;
ETForest *EF;
ScalarEvolution *SE;
const TargetData *TD;
const Type *UIntPtrTy;
@ -111,7 +111,7 @@ namespace {
virtual bool runOnFunction(Function &) {
LI = &getAnalysis<LoopInfo>();
DS = &getAnalysis<DominatorSet>();
EF = &getAnalysis<ETForest>();
SE = &getAnalysis<ScalarEvolution>();
TD = &getAnalysis<TargetData>();
UIntPtrTy = TD->getIntPtrType();
@ -129,13 +129,14 @@ namespace {
AU.addPreservedID(LoopSimplifyID);
AU.addPreserved<LoopInfo>();
AU.addPreserved<DominatorSet>();
AU.addPreserved<ETForest>();
AU.addPreserved<ImmediateDominators>();
AU.addPreserved<DominanceFrontier>();
AU.addPreserved<DominatorTree>();
AU.addRequiredID(LoopSimplifyID);
AU.addRequired<LoopInfo>();
AU.addRequired<DominatorSet>();
AU.addRequired<ETForest>();
AU.addRequired<TargetData>();
AU.addRequired<ScalarEvolution>();
}
@ -324,7 +325,7 @@ static bool getSCEVStartAndStride(const SCEVHandle &SH, Loop *L,
/// the loop, resulting in reg-reg copies (if we use the pre-inc value when we
/// should use the post-inc value).
static bool IVUseShouldUsePostIncValue(Instruction *User, Instruction *IV,
Loop *L, DominatorSet *DS, Pass *P) {
Loop *L, ETForest *EF, Pass *P) {
// If the user is in the loop, use the preinc value.
if (L->contains(User->getParent())) return false;
@ -332,7 +333,7 @@ static bool IVUseShouldUsePostIncValue(Instruction *User, Instruction *IV,
// Ok, the user is outside of the loop. If it is dominated by the latch
// block, use the post-inc value.
if (DS->dominates(LatchBlock, User->getParent()))
if (EF->dominates(LatchBlock, User->getParent()))
return true;
// There is one case we have to be careful of: PHI nodes. These little guys
@ -349,7 +350,7 @@ static bool IVUseShouldUsePostIncValue(Instruction *User, Instruction *IV,
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
if (PN->getIncomingValue(i) == IV) {
++NumUses;
if (!DS->dominates(LatchBlock, PN->getIncomingBlock(i)))
if (!EF->dominates(LatchBlock, PN->getIncomingBlock(i)))
return false;
}
@ -415,7 +416,7 @@ bool LoopStrengthReduce::AddUsersIfInteresting(Instruction *I, Loop *L,
// Okay, we found a user that we cannot reduce. Analyze the instruction
// and decide what to do with it. If we are a use inside of the loop, use
// the value before incrementation, otherwise use it after incrementation.
if (IVUseShouldUsePostIncValue(User, I, L, DS, this)) {
if (IVUseShouldUsePostIncValue(User, I, L, EF, this)) {
// The value used will be incremented by the stride more than we are
// expecting, so subtract this off.
SCEVHandle NewStart = SCEV::getMinusSCEV(Start, Stride);