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Finally get this patch right :)

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Replace expensive getZExtValue() == 0 calls with isZero() calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34861 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-03-02 23:51:25 +00:00
parent 502db93a8a
commit bee0f663d8
1 changed files with 5 additions and 5 deletions
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10
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -540,7 +540,7 @@ Value *BasedUser::InsertCodeForBaseAtPosition(const SCEVHandle &NewBase,
// If there is no immediate value, skip the next part. // If there is no immediate value, skip the next part.
if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Imm)) if (SCEVConstant *SC = dyn_cast<SCEVConstant>(Imm))
if (SC->getValue()->isNullValue()) if (SC->getValue()->isZero())
return Rewriter.expandCodeFor(NewBase, BaseInsertPt, return Rewriter.expandCodeFor(NewBase, BaseInsertPt,
OperandValToReplace->getType()); OperandValToReplace->getType());
@ -779,7 +779,7 @@ static void SeparateSubExprs(std::vector<SCEVHandle> &SubExprs,
SeparateSubExprs(SubExprs, SARE->getOperand(0)); SeparateSubExprs(SubExprs, SARE->getOperand(0));
} }
} else if (!isa<SCEVConstant>(Expr) || } else if (!isa<SCEVConstant>(Expr) ||
!cast<SCEVConstant>(Expr)->getValue()->isNullValue()) { !cast<SCEVConstant>(Expr)->getValue()->isZero()) {
// Do not add zero. // Do not add zero.
SubExprs.push_back(Expr); SubExprs.push_back(Expr);
} }
@ -869,7 +869,7 @@ RemoveCommonExpressionsFromUseBases(std::vector<BasedUser> &Uses) {
/// ///
static bool isZero(SCEVHandle &V) { static bool isZero(SCEVHandle &V) {
if (SCEVConstant *SC = dyn_cast<SCEVConstant>(V)) if (SCEVConstant *SC = dyn_cast<SCEVConstant>(V))
return SC->getValue()->getZExtValue() == 0; return SC->getValue()->isZero();
return false; return false;
} }
@ -1148,14 +1148,14 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
// are reusing an IV, it has not been used to initialize the PHI node. // are reusing an IV, it has not been used to initialize the PHI node.
// Add it to the expression used to rewrite the uses. // Add it to the expression used to rewrite the uses.
if (!isa<ConstantInt>(CommonBaseV) || if (!isa<ConstantInt>(CommonBaseV) ||
!cast<ConstantInt>(CommonBaseV)->isNullValue()) !cast<ConstantInt>(CommonBaseV)->isZero())
RewriteExpr = SCEVAddExpr::get(RewriteExpr, RewriteExpr = SCEVAddExpr::get(RewriteExpr,
SCEVUnknown::get(CommonBaseV)); SCEVUnknown::get(CommonBaseV));
} }
// Now that we know what we need to do, insert code before User for the // Now that we know what we need to do, insert code before User for the
// immediate and any loop-variant expressions. // immediate and any loop-variant expressions.
if (!isa<ConstantInt>(BaseV) || !cast<ConstantInt>(BaseV)->isNullValue()) if (!isa<ConstantInt>(BaseV) || !cast<ConstantInt>(BaseV)->isZero())
// Add BaseV to the PHI value if needed. // Add BaseV to the PHI value if needed.
RewriteExpr = SCEVAddExpr::get(RewriteExpr, SCEVUnknown::get(BaseV)); RewriteExpr = SCEVAddExpr::get(RewriteExpr, SCEVUnknown::get(BaseV));