Small cleanup. Use APInt::getHighBitsSet method instead of shift left.
"setcc" -> "icmp op" in comments. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44249 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp
index e7bb9ab..fed57f9 100644
--- a/lib/Analysis/ScalarEvolution.cpp
+++ b/lib/Analysis/ScalarEvolution.cpp
@@ -1207,7 +1207,7 @@
SCEVHandle ComputeIterationCount(const Loop *L);
/// ComputeLoadConstantCompareIterationCount - Given an exit condition of
- /// 'setcc load X, cst', try to see if we can compute the trip count.
+ /// 'icmp op load X, cst', try to see if we can compute the trip count.
SCEVHandle ComputeLoadConstantCompareIterationCount(LoadInst *LI,
Constant *RHS,
const Loop *L,
@@ -1418,13 +1418,12 @@
if (!V.isMinValue())
return V;
else // Zero is a multiple of everything.
- return APInt(C->getBitWidth(), 1).shl(C->getBitWidth()-1);
+ return APInt::getHighBitsSet(C->getBitWidth(), 1);
}
- if (SCEVTruncateExpr *T = dyn_cast<SCEVTruncateExpr>(S)) {
+ if (SCEVTruncateExpr *T = dyn_cast<SCEVTruncateExpr>(S))
return GetConstantFactor(T->getOperand()).trunc(
cast<IntegerType>(T->getType())->getBitWidth());
- }
if (SCEVZeroExtendExpr *E = dyn_cast<SCEVZeroExtendExpr>(S))
return GetConstantFactor(E->getOperand()).zext(
cast<IntegerType>(E->getType())->getBitWidth());
@@ -1787,7 +1786,7 @@
}
/// ComputeLoadConstantCompareIterationCount - Given an exit condition of
-/// 'setcc load X, cst', try to se if we can compute the trip count.
+/// 'icmp op load X, cst', try to se if we can compute the trip count.
SCEVHandle ScalarEvolutionsImpl::
ComputeLoadConstantCompareIterationCount(LoadInst *LI, Constant *RHS,
const Loop *L,