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[SCEV] Fix indentation and combine two if statements in getMulExpr, NFC. 

llvm-svn: 334735
This commit is contained in:
Justin Lebar 2018-06-14 17:13:22 +00:00
parent c0dba0af01
commit 62a0747926
1 changed files with 14 additions and 15 deletions
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29
llvm/lib/Analysis/ScalarEvolution.cpp
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@ -2764,22 +2764,21 @@ const SCEV *ScalarEvolution::getMulExpr(SmallVectorImpl<const SCEV *> &Ops,
unsigned Idx = 0;
if (const SCEVConstant *LHSC = dyn_cast<SCEVConstant>(Ops[0])) {
// C1*(C2+V) -> C1*C2 + C1*V
if (Ops.size() == 2)
if (const SCEVAddExpr *Add = dyn_cast<SCEVAddExpr>(Ops[1]))
// If any of Add's ops are Adds or Muls with a constant,
// apply this transformation as well.
if (Add->getNumOperands() == 2)
// TODO: There are some cases where this transformation is not
// profitable, for example:
// Add = (C0 + X) * Y + Z.
// Maybe the scope of this transformation should be narrowed down.
if (containsConstantInAddMulChain(Add))
return getAddExpr(getMulExpr(LHSC, Add->getOperand(0),
SCEV::FlagAnyWrap, Depth + 1),
getMulExpr(LHSC, Add->getOperand(1),
SCEV::FlagAnyWrap, Depth + 1),
SCEV::FlagAnyWrap, Depth + 1);
// C1*(C2+V) -> C1*C2 + C1*V
if (const SCEVAddExpr *Add = dyn_cast<SCEVAddExpr>(Ops[1]))
// If any of Add's ops are Adds or Muls with a constant, apply this
// transformation as well.
//
// TODO: There are some cases where this transformation is not
// profitable; for example, Add = (C0 + X) * Y + Z. Maybe the scope of
// this transformation should be narrowed down.
if (Add->getNumOperands() == 2 && containsConstantInAddMulChain(Add))
return getAddExpr(getMulExpr(LHSC, Add->getOperand(0),
SCEV::FlagAnyWrap, Depth + 1),
getMulExpr(LHSC, Add->getOperand(1),
SCEV::FlagAnyWrap, Depth + 1),
SCEV::FlagAnyWrap, Depth + 1);
++Idx;
while (const SCEVConstant *RHSC = dyn_cast<SCEVConstant>(Ops[Idx])) {