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[NFC] Move function up in code

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This commit is contained in:
Max Kazantsev 2021-03-19 14:03:31 +07:00
parent 2ca3074b8b
commit 596eabe11c
1 changed files with 18 additions and 18 deletions
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36
lib/Transforms/Utils/SimplifyIndVar.cpp
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@ -99,6 +99,24 @@ namespace {
};
}
/// Find a point in code which dominates all given instructions. We can safely
/// assume that, whatever fact we can prove at the found point, this fact is
/// also true for each of the given instructions.
static Instruction *findCommonDominator(ArrayRef<Instruction *> Instructions,
DominatorTree &DT) {
Instruction *CommonDom = nullptr;
for (auto *Insn : Instructions)
if (!CommonDom || DT.dominates(Insn, CommonDom))
CommonDom = Insn;
else if (!DT.dominates(CommonDom, Insn))
// If there is no dominance relation, use common dominator.
CommonDom =
DT.findNearestCommonDominator(CommonDom->getParent(),
Insn->getParent())->getTerminator();
assert(CommonDom && "Common dominator not found?");
return CommonDom;
}
/// Fold an IV operand into its use. This removes increments of an
/// aligned IV when used by a instruction that ignores the low bits.
///
@ -1477,24 +1495,6 @@ bool WidenIV::widenLoopCompare(WidenIV::NarrowIVDefUse DU) {
return true;
}
/// Find a point in code which dominates all given instructions. We can safely
/// assume that, whatever fact we can prove at the found point, this fact is
/// also true for each of the given instructions.
static Instruction *findCommonDominator(ArrayRef<Instruction *> Instructions,
DominatorTree &DT) {
Instruction *CommonDom = nullptr;
for (auto *Insn : Instructions)
if (!CommonDom || DT.dominates(Insn, CommonDom))
CommonDom = Insn;
else if (!DT.dominates(CommonDom, Insn))
// If there is no dominance relation, use common dominator.
CommonDom =
DT.findNearestCommonDominator(CommonDom->getParent(),
Insn->getParent())->getTerminator();
assert(CommonDom && "Common dominator not found?");
return CommonDom;
}
// The widenIVUse avoids generating trunc by evaluating the use as AddRec, this
// will not work when:
// 1) SCEV traces back to an instruction inside the loop that SCEV can not