[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, 7 insertions, 4 deletions

diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 1fce430e30e..30d3b49d9d7 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -4228,18 +4228,21 @@ bool LLParser::ParseSpecializedMDNode(MDNode *&N, bool IsDistinct) {
   (IsDistinct ? CLASS::getDistinct ARGS : CLASS::get ARGS)
 
 /// ParseDILocationFields:
-///   ::= !DILocation(line: 43, column: 8, scope: !5, inlinedAt: !6)
+///   ::= !DILocation(line: 43, column: 8, scope: !5, inlinedAt: !6,
+///   isImplicitCode: true)
 bool LLParser::ParseDILocation(MDNode *&Result, bool IsDistinct) {
 #define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
   OPTIONAL(line, LineField, );                                                 \
   OPTIONAL(column, ColumnField, );                                             \
   REQUIRED(scope, MDField, (/* AllowNull */ false));                           \
-  OPTIONAL(inlinedAt, MDField, );
+  OPTIONAL(inlinedAt, MDField, );                                              \
+  OPTIONAL(isImplicitCode, MDBoolField, (false));
   PARSE_MD_FIELDS();
 #undef VISIT_MD_FIELDS
 
-  Result = GET_OR_DISTINCT(
-      DILocation, (Context, line.Val, column.Val, scope.Val, inlinedAt.Val));
+  Result =
+      GET_OR_DISTINCT(DILocation, (Context, line.Val, column.Val, scope.Val,
+                                   inlinedAt.Val, isImplicitCode.Val));
   return false;
 }