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Move SCEV::isLoopInvariant and hasComputableLoopEvolution to be member

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functions of ScalarEvolution, in preparation for memoization and
other optimizations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119562 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-11-17 21:23:15 +00:00
parent f8dabac604
commit 17ead4ff4b
7 changed files with 163 additions and 154 deletions
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10
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@@ -730,7 +730,7 @@ void Cost::RateRegister(const SCEV *Reg,
++SetupCost;
NumIVMuls += isa<SCEVMulExpr>(Reg) &&
Reg->hasComputableLoopEvolution(L);
SE.hasComputableLoopEvolution(Reg, L);
}
/// RatePrimaryRegister - Record this register in the set. If we haven't seen it
@@ -2056,7 +2056,7 @@ void LSRInstance::CollectFixupsAndInitialFormulae() {
// x == y --> x - y == 0
const SCEV *N = SE.getSCEV(NV);
if (N->isLoopInvariant(L)) {
if (SE.isLoopInvariant(N, L)) {
Kind = LSRUse::ICmpZero;
S = SE.getMinusSCEV(N, S);
}
@@ -2196,7 +2196,7 @@ LSRInstance::CollectLoopInvariantFixupsAndFormulae() {
if (const ICmpInst *ICI = dyn_cast<ICmpInst>(UserInst)) {
unsigned OtherIdx = !UI.getOperandNo();
Value *OtherOp = const_cast<Value *>(ICI->getOperand(OtherIdx));
if (SE.getSCEV(OtherOp)->hasComputableLoopEvolution(L))
if (SE.hasComputableLoopEvolution(SE.getSCEV(OtherOp), L))
continue;
}
@@ -2279,7 +2279,7 @@ void LSRInstance::GenerateReassociations(LSRUse &LU, unsigned LUIdx,
// Loop-variant "unknown" values are uninteresting; we won't be able to
// do anything meaningful with them.
if (isa<SCEVUnknown>(*J) && !(*J)->isLoopInvariant(L))
if (isa<SCEVUnknown>(*J) && !SE.isLoopInvariant(*J, L))
continue;
// Don't pull a constant into a register if the constant could be folded
@@ -2331,7 +2331,7 @@ void LSRInstance::GenerateCombinations(LSRUse &LU, unsigned LUIdx,
I = Base.BaseRegs.begin(), E = Base.BaseRegs.end(); I != E; ++I) {
const SCEV *BaseReg = *I;
if (BaseReg->properlyDominates(L->getHeader(), &DT) &&
!BaseReg->hasComputableLoopEvolution(L))
!SE.hasComputableLoopEvolution(BaseReg, L))
Ops.push_back(BaseReg);
else
F.BaseRegs.push_back(BaseReg);