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For the return type of SCEVUDivExpr, use the RHS' type instead of

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that of the LHS. It doesn't matter for correctness, but the LHS
is more likely than the RHS to be a pointer type in exotic cases,
and it's more tidy to have it return the integer type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72424 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-05-26 17:44:05 +00:00
parent d9480d0f68
commit 91bb61a1e2
1 changed files with 6 additions and 1 deletions
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7
lib/Analysis/ScalarEvolution.cpp
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@ -346,7 +346,12 @@ void SCEVUDivExpr::print(raw_ostream &OS) const {
}
const Type *SCEVUDivExpr::getType() const {
return LHS->getType();
// In most cases the types of LHS and RHS will be the same, but in some
// crazy cases one or the other may be a pointer. ScalarEvolution doesn't
// depend on the type for correctness, but handling types carefully can
// avoid extra casts in the SCEVExpander. The LHS is more likely to be
// a pointer type than the RHS, so use the RHS' type here.
return RHS->getType();
}
// SCEVAddRecExprs - Only allow the creation of one SCEVAddRecExpr for any