Fix the implementation of ConstantRange::sub(ConstantRange). Patch by Xi Wang!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp
index 493f708..81382d0 100644
--- a/lib/Support/ConstantRange.cpp
+++ b/lib/Support/ConstantRange.cpp
@@ -529,8 +529,8 @@
return ConstantRange(getBitWidth(), /*isFullSet=*/true);
APInt Spread_X = getSetSize(), Spread_Y = Other.getSetSize();
- APInt NewLower = getLower() - Other.getLower();
- APInt NewUpper = getUpper() - Other.getUpper() + 1;
+ APInt NewLower = getLower() - Other.getUpper() + 1;
+ APInt NewUpper = getUpper() - Other.getLower();
if (NewLower == NewUpper)
return ConstantRange(getBitWidth(), /*isFullSet=*/true);