LSR fix: "Special" users are just like "Basic" users but allow -1 scale.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158536 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 94c229a..963811e 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -1308,8 +1308,8 @@
return !AM.BaseGV && AM.Scale == 0 && AM.BaseOffs == 0;
case LSRUse::Special:
- // Only handle -1 scales, or no scale.
- return AM.Scale == 0 || AM.Scale == -1;
+ // Special case Basic to handle -1 scales.
+ return !AM.BaseGV && (AM.Scale == 0 || AM.Scale == -1) && AM.BaseOffs == 0;
}
llvm_unreachable("Invalid LSRUse Kind!");