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Silence warnings about -1 being converted to an unsigned value.

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Also, pass true for isSigned even when creating constants for unsigned
comparisons, because the point is to create an all-ones constant,
rather than UINT64_MAX, even for integers wider than 64 bits.

llvm-svn: 102946
This commit is contained in:
Dan Gohman 2010-05-03 20:23:47 +00:00
parent 3496e7c880
commit 66c6519877
1 changed files with 6 additions and 6 deletions
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12
lib/Analysis/ScalarEvolution.cpp
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@ -4952,7 +4952,7 @@ bool ScalarEvolution::SimplifyICmpOperands(ICmpInst::Predicate &Pred,
Pred = ICmpInst::ICMP_SLT;
Changed = true;
} else if (!getSignedRange(LHS).getSignedMin().isMinSignedValue()) {
LHS = getAddExpr(getConstant(RHS->getType(), -1, true), LHS,
LHS = getAddExpr(getConstant(RHS->getType(), (uint64_t)-1, true), LHS,
/*HasNUW=*/false, /*HasNSW=*/true);
Pred = ICmpInst::ICMP_SLT;
Changed = true;
@ -4960,7 +4960,7 @@ bool ScalarEvolution::SimplifyICmpOperands(ICmpInst::Predicate &Pred,
break;
case ICmpInst::ICMP_SGE:
if (!getSignedRange(RHS).getSignedMin().isMinSignedValue()) {
RHS = getAddExpr(getConstant(RHS->getType(), -1, true), RHS,
RHS = getAddExpr(getConstant(RHS->getType(), (uint64_t)-1, true), RHS,
/*HasNUW=*/false, /*HasNSW=*/true);
Pred = ICmpInst::ICMP_SGT;
Changed = true;
@ -4973,12 +4973,12 @@ bool ScalarEvolution::SimplifyICmpOperands(ICmpInst::Predicate &Pred,
break;
case ICmpInst::ICMP_ULE:
if (!getUnsignedRange(RHS).getUnsignedMax().isMaxValue()) {
RHS = getAddExpr(getConstant(RHS->getType(), 1, false), RHS,
RHS = getAddExpr(getConstant(RHS->getType(), 1, true), RHS,
/*HasNUW=*/true, /*HasNSW=*/false);
Pred = ICmpInst::ICMP_ULT;
Changed = true;
} else if (!getUnsignedRange(LHS).getUnsignedMin().isMinValue()) {
LHS = getAddExpr(getConstant(RHS->getType(), -1, false), LHS,
LHS = getAddExpr(getConstant(RHS->getType(), (uint64_t)-1, true), LHS,
/*HasNUW=*/true, /*HasNSW=*/false);
Pred = ICmpInst::ICMP_ULT;
Changed = true;
@ -4986,12 +4986,12 @@ bool ScalarEvolution::SimplifyICmpOperands(ICmpInst::Predicate &Pred,
break;
case ICmpInst::ICMP_UGE:
if (!getUnsignedRange(RHS).getUnsignedMin().isMinValue()) {
RHS = getAddExpr(getConstant(RHS->getType(), -1, false), RHS,
RHS = getAddExpr(getConstant(RHS->getType(), (uint64_t)-1, true), RHS,
/*HasNUW=*/true, /*HasNSW=*/false);
Pred = ICmpInst::ICMP_UGT;
Changed = true;
} else if (!getUnsignedRange(LHS).getUnsignedMax().isMaxValue()) {
LHS = getAddExpr(getConstant(RHS->getType(), 1, false), LHS,
LHS = getAddExpr(getConstant(RHS->getType(), 1, true), LHS,
/*HasNUW=*/true, /*HasNSW=*/false);
Pred = ICmpInst::ICMP_UGT;
Changed = true;