[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, 15 insertions, 2 deletions

diff --git a/llvm/lib/IR/DebugLoc.cpp b/llvm/lib/IR/DebugLoc.cpp
index 36f3e179a2c..10ec98ac7e6 100644
--- a/llvm/lib/IR/DebugLoc.cpp
+++ b/llvm/lib/IR/DebugLoc.cpp
@@ -56,15 +56,28 @@ DebugLoc DebugLoc::getFnDebugLoc() const {
   return DebugLoc();
 }
 
+bool DebugLoc::isImplicitCode() const {
+  if (DILocation *Loc = get()) {
+    return Loc->isImplicitCode();
+  }
+  return true;
+}
+
+void DebugLoc::setImplicitCode(bool ImplicitCode) {
+  if (DILocation *Loc = get()) {
+    Loc->setImplicitCode(ImplicitCode);
+  }
+}
+
 DebugLoc DebugLoc::get(unsigned Line, unsigned Col, const MDNode *Scope,
-                       const MDNode *InlinedAt) {
+                       const MDNode *InlinedAt, bool ImplicitCode) {
   // If no scope is available, this is an unknown location.
   if (!Scope)
     return DebugLoc();
 
   return DILocation::get(Scope->getContext(), Line, Col,
                          const_cast<MDNode *>(Scope),
-                         const_cast<MDNode *>(InlinedAt));
+                         const_cast<MDNode *>(InlinedAt), ImplicitCode);
 }
 
 DebugLoc DebugLoc::appendInlinedAt(DebugLoc DL, DILocation *InlinedAt,