[codeview] Describe int local variables using .cv_def_range

Summary:
Refactor common value, scope, and label tracking logic out of DwarfDebug
into a common base class called DebugHandlerBase.

Update an old LLVM IR test case to avoid an assertion in LexicalScopes.

Reviewers: dblaikie, majnemer

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D16931

llvm-svn: 260432

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCRegisterInfo.cpp b/llvm/lib/MC/MCRegisterInfo.cpp
index ce79cd5c2c6..7af81fc7913 100644
--- a/llvm/lib/MC/MCRegisterInfo.cpp
+++ b/llvm/lib/MC/MCRegisterInfo.cpp
@@ -84,3 +84,10 @@ int MCRegisterInfo::getSEHRegNum(unsigned RegNum) const {
   if (I == L2SEHRegs.end()) return (int)RegNum;
   return I->second;
 }
+
+int MCRegisterInfo::getCodeViewRegNum(unsigned RegNum) const {
+  const DenseMap<unsigned, int>::const_iterator I = L2CVRegs.find(RegNum);
+  if (I == L2CVRegs.end())
+    report_fatal_error("target does not implement codeview register mapping");
+  return I->second;
+}