Struct-path aware TBAA: fix handling of may_alias attribute.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180656 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index ea13de1..f426a52 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -2588,8 +2588,8 @@
getContext().getASTRecordLayout(field->getParent());
// Set the base type to be the base type of the base LValue and
// update offset to be relative to the base type.
- LV.setTBAABaseType(base.getTBAABaseType());
- LV.setTBAAOffset(base.getTBAAOffset() +
+ LV.setTBAABaseType(mayAlias ? getContext().CharTy : base.getTBAABaseType());
+ LV.setTBAAOffset(mayAlias ? 0 : base.getTBAAOffset() +
Layout.getFieldOffset(field->getFieldIndex()) /
getContext().getCharWidth());
}