[llvm] Implements PGOBBAddrMap in Object and ObjectYAML with tests [1/5] (PR #71750)

[James Henderson via llvm-commits]

================
@@ -849,18 +850,24 @@ TEST(ELFObjectFileTest, InvalidDecodePGOBBAddrMap) {
             AddressOffset: 0x2
             Size:          0x1
             Metadata:      0x2
-          - ID:            4
-            AddressOffset: 0x3
-            Size:          0x1
-            Metadata:      0x2
+    PGOAnalyses:
+      - PGOBBEntries:
+         - Successors:
+            - ID:          2
+              BrProb:      0x80000000
+            - ID:          3
+              BrProb:      0x80000000
+         - Successors:
+            - ID:          3
+              BrProb:      0xF0000000
 )";
 
-  DoCheck(MissingBrProb, "unable to decode LEB128 at offset 0x0000001b: "
+  DoCheck(MissingBrProb, "unable to decode LEB128 at offset 0x00000017: "
                          "malformed uleb128, extends past end");
 }
 
-// Test for the ELFObjectFile::readPGOBBAddrMap API.
-TEST(ELFObjectFileTest, ReadPGOBBAddrMap) {
+// Test for the ELFObjectFile::readBBAddrMap API with PGOAnalysisMap
----------------
jh7370 wrote:

Nit.
```suggestion
// Test for the ELFObjectFile::readBBAddrMap API with PGOAnalysisMap.
```

https://github.com/llvm/llvm-project/pull/71750