DebugInfo: preparation to implement DW_AT_alignment

 - Add alignment attribute to DIVariable family
 - Modify bitcode format to match new DIVariable representation
 - Update tests to match these changes (also add bitcode upgrade test)
 - Expect that frontend passes non-zero align value only when it is not default
   (was forcibly aligned by alignas()/_Alignas()/__atribute__(aligned())

Differential Revision: https://reviews.llvm.org/D25073

llvm-svn: 284678

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index 5500e9638b2..ea00baf3d97 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -1822,6 +1822,7 @@ static void writeDIGlobalVariable(raw_ostream &Out, const DIGlobalVariable *N,
   Printer.printBool("isDefinition", N->isDefinition());
   Printer.printMetadata("expr", N->getExpr());
   Printer.printMetadata("declaration", N->getRawStaticDataMemberDeclaration());
+  Printer.printInt("align", N->getAlignInBits());
   Out << ")";
 }
 
@@ -1837,6 +1838,7 @@ static void writeDILocalVariable(raw_ostream &Out, const DILocalVariable *N,
   Printer.printInt("line", N->getLine());
   Printer.printMetadata("type", N->getRawType());
   Printer.printDIFlags("flags", N->getFlags());
+  Printer.printInt("align", N->getAlignInBits());
   Out << ")";
 }