XCore target requires preferred alignment.

The xcore llvm backend does not handle 8 byte alignment viz:
  "%BadAlignment = alloca i64, align 8"
So getPreferredTypeAlign() must never overalign.

llvm-svn: 194462

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 6729986c8d5..a03cf9e7d47 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -34,6 +34,7 @@
 #include "clang/Basic/TargetInfo.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
 #include "llvm/Support/Capacity.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
@@ -1757,6 +1758,9 @@ CharUnits ASTContext::getTypeAlignInChars(const Type *T) const {
 unsigned ASTContext::getPreferredTypeAlign(const Type *T) const {
   unsigned ABIAlign = getTypeAlign(T);
 
+  if (Target->getTriple().getArch() == llvm::Triple::xcore)
+    return ABIAlign;  // Never overalign on XCore.
+
   // Double and long long should be naturally aligned if possible.
   if (const ComplexType* CT = T->getAs<ComplexType>())
     T = CT->getElementType().getTypePtr();