Factor out label difference creation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82282 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/DwarfException.h b/lib/CodeGen/AsmPrinter/DwarfException.h
index f6f5025..7e89876 100644
--- a/lib/CodeGen/AsmPrinter/DwarfException.h
+++ b/lib/CodeGen/AsmPrinter/DwarfException.h
@@ -25,6 +25,7 @@
struct LandingPadInfo;
class MachineModuleInfo;
class MCAsmInfo;
+class MCExpr;
class Timer;
class raw_ostream;
@@ -168,6 +169,11 @@
const SmallVectorImpl<unsigned> &FirstActions);
void EmitExceptionTable();
+ /// CreateLabelDiff - Emit a label and subtract it from the expression we
+ /// already have. This is equivalent to emitting "foo - .", but we have to
+ /// emit the label for "." directly.
+ const MCExpr *CreateLabelDiff(const MCExpr *ExprRef, const char *LabelName,
+ unsigned Index);
public:
//===--------------------------------------------------------------------===//
// Main entry points.