If a global variable has a specified alignment that is less than the preferred
alignment for its type, use the minimum of the specified alignment and the ABI
alignment. This fixes <rdar://problem/9275290>.
llvm-svn: 129428
diff --git a/llvm/lib/Target/TargetData.cpp b/llvm/lib/Target/TargetData.cpp
index c628df0..d15855c 100644
--- a/llvm/lib/Target/TargetData.cpp
+++ b/llvm/lib/Target/TargetData.cpp
@@ -617,8 +617,12 @@
unsigned TargetData::getPreferredAlignment(const GlobalVariable *GV) const {
const Type *ElemType = GV->getType()->getElementType();
unsigned Alignment = getPrefTypeAlignment(ElemType);
- if (GV->getAlignment() > Alignment)
- Alignment = GV->getAlignment();
+ unsigned GVAlignment = GV->getAlignment();
+ if (GVAlignment >= Alignment) {
+ Alignment = GVAlignment;
+ } else if (GVAlignment != 0) {
+ Alignment = std::min(GVAlignment, getABITypeAlignment(ElemType));
+ }
if (GV->hasInitializer()) {
if (Alignment < 16) {