[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, 8 insertions, 5 deletions

diff --git a/llvm/lib/IR/LLVMContextImpl.h b/llvm/lib/IR/LLVMContextImpl.h
index 2b93f521495..dcbbfebd05e 100644
--- a/llvm/lib/IR/LLVMContextImpl.h
+++ b/llvm/lib/IR/LLVMContextImpl.h
@@ -280,21 +280,24 @@ template <> struct MDNodeKeyImpl<DILocation> {
   unsigned Column;
   Metadata *Scope;
   Metadata *InlinedAt;
+  bool ImplicitCode;
 
   MDNodeKeyImpl(unsigned Line, unsigned Column, Metadata *Scope,
-                Metadata *InlinedAt)
-      : Line(Line), Column(Column), Scope(Scope), InlinedAt(InlinedAt) {}
+                Metadata *InlinedAt, bool ImplicitCode)
+      : Line(Line), Column(Column), Scope(Scope), InlinedAt(InlinedAt),
+        ImplicitCode(ImplicitCode) {}
   MDNodeKeyImpl(const DILocation *L)
       : Line(L->getLine()), Column(L->getColumn()), Scope(L->getRawScope()),
-        InlinedAt(L->getRawInlinedAt()) {}
+        InlinedAt(L->getRawInlinedAt()), ImplicitCode(L->isImplicitCode()) {}
 
   bool isKeyOf(const DILocation *RHS) const {
     return Line == RHS->getLine() && Column == RHS->getColumn() &&
-           Scope == RHS->getRawScope() && InlinedAt == RHS->getRawInlinedAt();
+           Scope == RHS->getRawScope() && InlinedAt == RHS->getRawInlinedAt() &&
+           ImplicitCode == RHS->isImplicitCode();
   }
 
   unsigned getHashValue() const {
-    return hash_combine(Line, Column, Scope, InlinedAt);
+    return hash_combine(Line, Column, Scope, InlinedAt, ImplicitCode);
   }
 };