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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104268 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-05-20 20:00:41 +00:00
parent d974a0e9d6
commit f7ff37d674
1 changed files with 6 additions and 0 deletions
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6
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -2811,6 +2811,9 @@ void LSRInstance::NarrowSearchSpaceUsingHeuristics() {
bool Any = false;
for (size_t i = 0, e = LU.Formulae.size(); i != e; ++i) {
Formula &F = LU.Formulae[i];
// Look for a formula with a constant or GV in a register. If the use
// also has a formula with that same value in an immediate field,
// delete the one that uses a register.
for (SmallVectorImpl<const SCEV *>::const_iterator
I = F.BaseRegs.begin(), E = F.BaseRegs.end(); I != E; ++I) {
if (const SCEVConstant *C = dyn_cast<SCEVConstant>(*I)) {
@ -2861,6 +2864,8 @@ void LSRInstance::NarrowSearchSpaceUsingHeuristics() {
"separated by a constant offset will use the same "
"registers.\n");
// This is especially useful for unrolled loops.
for (size_t LUIdx = 0, NumUses = Uses.size(); LUIdx != NumUses; ++LUIdx) {
LSRUse &LU = Uses[LUIdx];
for (size_t FIdx = 0, NumForms = LU.Formulae.size();
@ -3074,6 +3079,7 @@ void LSRInstance::Solve(SmallVectorImpl<const Formula *> &Solution) const {
DenseSet<const SCEV *> VisitedRegs;
Workspace.reserve(Uses.size());
// SolveRecurse does all the work.
SolveRecurse(Solution, SolutionCost, Workspace, CurCost,
CurRegs, VisitedRegs);