[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, 3 insertions, 0 deletions

diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index adaa586..b8444bc 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -1403,6 +1403,7 @@ unsigned ModuleBitcodeWriter::createDILocationAbbrev() {
   Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 8));
   Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
   Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6));
+  Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 1));
   return Stream.EmitAbbrev(std::move(Abbv));
 }
 
@@ -1417,6 +1418,7 @@ void ModuleBitcodeWriter::writeDILocation(const DILocation *N,
   Record.push_back(N->getColumn());
   Record.push_back(VE.getMetadataID(N->getScope()));
   Record.push_back(VE.getMetadataOrNullID(N->getInlinedAt()));
+  Record.push_back(N->isImplicitCode());
 
   Stream.EmitRecord(bitc::METADATA_LOCATION, Record, Abbrev);
   Record.clear();
@@ -3093,6 +3095,7 @@ void ModuleBitcodeWriter::writeFunction(
       Vals.push_back(DL->getColumn());
       Vals.push_back(VE.getMetadataOrNullID(DL->getScope()));
       Vals.push_back(VE.getMetadataOrNullID(DL->getInlinedAt()));
+      Vals.push_back(DL->isImplicitCode());
       Stream.EmitRecord(bitc::FUNC_CODE_DEBUG_LOC, Vals);
       Vals.clear();