Add DebugIR pass -- emits IR file and replace source lines with IR lines in MD

- requires existing debug information to be present
- fixes up file name and line number information in metadata
- emits a "<orig_filename>-debug.ll" succinct IR file (without !dbg metadata
  or debug intrinsics) that can be read by a debugger
- initialize pass in opt tool to enable the "-debug-ir" flag
- lit tests to follow



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181467 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Instrumentation.h b/include/llvm/Transforms/Instrumentation.h
index 4aae200dd0..142b40f1ea 100644
--- a/include/llvm/Transforms/Instrumentation.h
+++ b/include/llvm/Transforms/Instrumentation.h
@@ -78,6 +78,10 @@ FunctionPass *createThreadSanitizerPass(StringRef BlacklistFile = StringRef());
 // checking on loads, stores, and other memory intrinsics.
 FunctionPass *createBoundsCheckingPass();
 
+/// createDebugIRPass - Create and return a pass that modifies a module's
+/// debug metadata to point back to IR instead of the original source file
+ModulePass *createDebugIRPass(StringRef FilenamePostfix);
+
 } // End llvm namespace
 
 #endif