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Reduce indents in LSRInstance::NarrowSearchSpaceByCollapsingUnrolledCode method.

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No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175364 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakub Staszak 2013-02-16 16:08:15 +00:00
parent 3d6417d170
commit 71d6a79ada
1 changed files with 65 additions and 65 deletions
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130
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -3850,83 +3850,83 @@ void LSRInstance::NarrowSearchSpaceByDetectingSupersets() {
/// for expressions like A, A+1, A+2, etc., allocate a single register for
/// them.
void LSRInstance::NarrowSearchSpaceByCollapsingUnrolledCode() {
if (EstimateSearchSpaceComplexity() >= ComplexityLimit) {
DEBUG(dbgs() << "The search space is too complex.\n");
if (EstimateSearchSpaceComplexity() < ComplexityLimit)
return;
DEBUG(dbgs() << "Narrowing the search space by assuming that uses "
"separated by a constant offset will use the same "
"registers.\n");
DEBUG(dbgs() << "The search space is too complex.\n"
"Narrowing the search space by assuming that uses separated "
"by a constant offset will use the same registers.\n");
// This is especially useful for unrolled loops.
// This is especially useful for unrolled loops.
for (size_t LUIdx = 0, NumUses = Uses.size(); LUIdx != NumUses; ++LUIdx) {
LSRUse &LU = Uses[LUIdx];
for (SmallVectorImpl<Formula>::const_iterator I = LU.Formulae.begin(),
E = LU.Formulae.end(); I != E; ++I) {
const Formula &F = *I;
if (F.BaseOffset != 0 && F.Scale == 0) {
if (LSRUse *LUThatHas = FindUseWithSimilarFormula(F, LU)) {
if (reconcileNewOffset(*LUThatHas, F.BaseOffset,
/*HasBaseReg=*/false,
LU.Kind, LU.AccessTy)) {
DEBUG(dbgs() << " Deleting use "; LU.print(dbgs());
dbgs() << '\n');
for (size_t LUIdx = 0, NumUses = Uses.size(); LUIdx != NumUses; ++LUIdx) {
LSRUse &LU = Uses[LUIdx];
for (SmallVectorImpl<Formula>::const_iterator I = LU.Formulae.begin(),
E = LU.Formulae.end(); I != E; ++I) {
const Formula &F = *I;
if (F.BaseOffset == 0 || F.Scale != 0)
continue;
LUThatHas->AllFixupsOutsideLoop &= LU.AllFixupsOutsideLoop;
LSRUse *LUThatHas = FindUseWithSimilarFormula(F, LU);
if (!LUThatHas)
continue;
// Update the relocs to reference the new use.
for (SmallVectorImpl<LSRFixup>::iterator I = Fixups.begin(),
E = Fixups.end(); I != E; ++I) {
LSRFixup &Fixup = *I;
if (Fixup.LUIdx == LUIdx) {
Fixup.LUIdx = LUThatHas - &Uses.front();
Fixup.Offset += F.BaseOffset;
// Add the new offset to LUThatHas' offset list.
if (LUThatHas->Offsets.back() != Fixup.Offset) {
LUThatHas->Offsets.push_back(Fixup.Offset);
if (Fixup.Offset > LUThatHas->MaxOffset)
LUThatHas->MaxOffset = Fixup.Offset;
if (Fixup.Offset < LUThatHas->MinOffset)
LUThatHas->MinOffset = Fixup.Offset;
}
DEBUG(dbgs() << "New fixup has offset "
<< Fixup.Offset << '\n');
}
if (Fixup.LUIdx == NumUses-1)
Fixup.LUIdx = LUIdx;
}
if (!reconcileNewOffset(*LUThatHas, F.BaseOffset, /*HasBaseReg=*/ false,
LU.Kind, LU.AccessTy))
continue;
// Delete formulae from the new use which are no longer legal.
bool Any = false;
for (size_t i = 0, e = LUThatHas->Formulae.size(); i != e; ++i) {
Formula &F = LUThatHas->Formulae[i];
if (!isLegalUse(TTI, LUThatHas->MinOffset, LUThatHas->MaxOffset,
LUThatHas->Kind, LUThatHas->AccessTy, F)) {
DEBUG(dbgs() << " Deleting "; F.print(dbgs());
dbgs() << '\n');
LUThatHas->DeleteFormula(F);
--i;
--e;
Any = true;
}
}
if (Any)
LUThatHas->RecomputeRegs(LUThatHas - &Uses.front(), RegUses);
DEBUG(dbgs() << " Deleting use "; LU.print(dbgs()); dbgs() << '\n');
// Delete the old use.
DeleteUse(LU, LUIdx);
--LUIdx;
--NumUses;
break;
}
LUThatHas->AllFixupsOutsideLoop &= LU.AllFixupsOutsideLoop;
// Update the relocs to reference the new use.
for (SmallVectorImpl<LSRFixup>::iterator I = Fixups.begin(),
E = Fixups.end(); I != E; ++I) {
LSRFixup &Fixup = *I;
if (Fixup.LUIdx == LUIdx) {
Fixup.LUIdx = LUThatHas - &Uses.front();
Fixup.Offset += F.BaseOffset;
// Add the new offset to LUThatHas' offset list.
if (LUThatHas->Offsets.back() != Fixup.Offset) {
LUThatHas->Offsets.push_back(Fixup.Offset);
if (Fixup.Offset > LUThatHas->MaxOffset)
LUThatHas->MaxOffset = Fixup.Offset;
if (Fixup.Offset < LUThatHas->MinOffset)
LUThatHas->MinOffset = Fixup.Offset;
}
DEBUG(dbgs() << "New fixup has offset " << Fixup.Offset << '\n');
}
if (Fixup.LUIdx == NumUses-1)
Fixup.LUIdx = LUIdx;
}
// Delete formulae from the new use which are no longer legal.
bool Any = false;
for (size_t i = 0, e = LUThatHas->Formulae.size(); i != e; ++i) {
Formula &F = LUThatHas->Formulae[i];
if (!isLegalUse(TTI, LUThatHas->MinOffset, LUThatHas->MaxOffset,
LUThatHas->Kind, LUThatHas->AccessTy, F)) {
DEBUG(dbgs() << " Deleting "; F.print(dbgs());
dbgs() << '\n');
LUThatHas->DeleteFormula(F);
--i;
--e;
Any = true;
}
}
}
DEBUG(dbgs() << "After pre-selection:\n";
print_uses(dbgs()));
if (Any)
LUThatHas->RecomputeRegs(LUThatHas - &Uses.front(), RegUses);
// Delete the old use.
DeleteUse(LU, LUIdx);
--LUIdx;
--NumUses;
break;
}
}
DEBUG(dbgs() << "After pre-selection:\n"; print_uses(dbgs()));
}
/// NarrowSearchSpaceByRefilteringUndesirableDedicatedRegisters - Call