[llvm] [SHT_LLVM_BB_ADDR_MAP] Fixes two bugs in decoding of PGOAnalyses in BBAddrMap. (PR #77139)

[Rahman Lavaee via llvm-commits]

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@@ -984,10 +984,23 @@ TEST(ELFObjectFileTest, ReadPGOAnalysisMap) {
               BrProb:      0xffffffff
           - BBFreq:         1000
             Successors:    []
-)");
+  - Name: .llvm_bb_addr_map_5
+    Type: SHT_LLVM_BB_ADDR_MAP
+  # Link: 0 (by default, can be overriden)
+    Entries:
+      - Version: 2
+        Address: 0x55555
+        Feature: 0x0
+        BBEntries:
+          - ID:            2
+            AddressOffset: 0x0
+            Size:          0x2
+            Metadata:      0x4
+    PGOAnalyses: [{}]
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rlavaee wrote:

Is there a test to catch inconsistency between Feature and PGOAnalyses? For example, one where Feature is 0x0 but PGOAnalyses is non-empty? We can add this in a separate PR.

https://github.com/llvm/llvm-project/pull/77139