[IR] Add a boolean field in DILocation to know if a line must covered or not

Summary:
Some lines have a hit counter where they should not have one.
For example, in C++, some cleanup is adding at the end of a scope represented by a '}'.
So such a line has a hit counter where a user expects to not have one.
The goal of the patch is to add this information in DILocation which is used to get the covered lines in GCOVProfiling.cpp.
A following patch in clang will add this information when generating IR (https://reviews.llvm.org/D49916).

Reviewers: marco-c, davidxl, vsk, javed.absar, rnk

Reviewed By: rnk

Subscribers: eraman, xur, danielcdh, aprantl, rnk, dblaikie, #debug-info, vsk, llvm-commits, sylvestre.ledru

Tags: #debug-info

Differential Revision: https://reviews.llvm.org/D49915

llvm-svn: 342631

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/IR/AsmWriter.cpp b/llvm/lib/IR/AsmWriter.cpp
index 1a8e3002b3b..536dbe064fc 100644
--- a/llvm/lib/IR/AsmWriter.cpp
+++ b/llvm/lib/IR/AsmWriter.cpp
@@ -1754,6 +1754,8 @@ static void writeDILocation(raw_ostream &Out, const DILocation *DL,
   Printer.printInt("column", DL->getColumn());
   Printer.printMetadata("scope", DL->getRawScope(), /* ShouldSkipNull */ false);
   Printer.printMetadata("inlinedAt", DL->getRawInlinedAt());
+  Printer.printBool("isImplicitCode", DL->isImplicitCode(),
+                    /* Default */ false);
   Out << ")";
 }