diff options
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/IndVarSimplify.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/Transforms/Scalar/IndVarSimplify.cpp b/lib/Transforms/Scalar/IndVarSimplify.cpp index 9c092e6077..7785855d0e 100644 --- a/lib/Transforms/Scalar/IndVarSimplify.cpp +++ b/lib/Transforms/Scalar/IndVarSimplify.cpp @@ -1506,9 +1506,10 @@ static Value *genLoopLimit(PHINode *IndVar, const SCEV *IVCount, Loop *L, // BECount = (IVEnd - IVInit - 1) => IVLimit = IVInit (postinc). // // Valid Cases: (1) both integers is most common; (2) both may be pointers - // for simple memset-style loops; (3) IVInit is an integer and IVCount is a - // pointer may occur when enable-iv-rewrite generates a canonical IV on top - // of case #2. + // for simple memset-style loops. + // + // IVInit integer and IVCount pointer would only occur if a canonical IV + // were generated on top of case #2, which is not expected. const SCEV *IVLimit = 0; // For unit stride, IVCount = Start + BECount with 2's complement overflow. |