1 files changed, 19 insertions, 9 deletions
diff --git a/llvm/docs/CoverageMappingFormat.rst b/llvm/docs/CoverageMappingFormat.rst
index 97809d56290..47d84e37619 100644
--- a/llvm/docs/CoverageMappingFormat.rst
+++ b/llvm/docs/CoverageMappingFormat.rst
@@ -260,20 +260,31 @@ The coverage mapping variable generated by Clang has 3 fields:
       i32 20, ; The length of the string that contains the encoded coverage mapping data
       i32 0,  ; Coverage mapping format version
     },
-    [2 x { i8*, i32, i32, i64 }] [ ; Function records
-     { i8*, i32, i32, i64 } { i8* getelementptr inbounds ([3 x i8]* @__profn_foo, i32 0, i32 0), ; Function's name
-       i32 3, ; Function's name length
+    [2 x { i64, i32, i64 }] [ ; Function records
+     { i64, i32, i64 } {
+       i64 0x5cf8c24cdb18bdac, ; Function's name MD5
        i32 9, ; Function's encoded coverage mapping data string length
        i64 0  ; Function's structural hash
      },
-     { i8*, i32, i32, i64 } { i8* getelementptr inbounds ([3 x i8]* @__profn_bar, i32 0, i32 0), ; Function's name
-       i32 3, ; Function's name length
+     { i64, i32, i64 } { 
+       i64 0xe413754a191db537, ; Function's name MD5
        i32 9, ; Function's encoded coverage mapping data string length
        i64 0  ; Function's structural hash
      }],
    [40 x i8] c"..." ; Encoded data (dissected later)
   }, section "__llvm_covmap", align 8
 
+The function record layout has evolved since version 1. In version 1, the function record for *foo* is defined as follows:
+
+.. code-block:: llvm
+
+     { i8*, i32, i32, i64 } { i8* getelementptr inbounds ([3 x i8]* @__profn_foo, i32 0, i32 0), ; Function's name
+       i32 3, ; Function's name length
+       i32 9, ; Function's encoded coverage mapping data string length
+       i64 0  ; Function's structural hash
+     }
+
+
 Coverage Mapping Header:
 ------------------------
 
@@ -296,11 +307,10 @@ A function record is a structure of the following type:
 
 .. code-block:: llvm
 
-  { i8*, i32, i32, i64 }
+  { i64, i32, i64 }
 
-It contains the pointer to the function's name, function's name length,
-the length of the encoded mapping data for that function, and function's 
-hash value.
+It contains function name's MD5, the length of the encoded mapping data for that function, and function's 
+structural hash value.
 
 Encoded data:
 -------------