[llvm] [memprof] Add MemProf version (PR #86414)

[Teresa Johnson via llvm-commits]

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@@ -570,12 +579,13 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
 
     uint64_t FrameTableOffset = FrameTableGenerator.Emit(OS.OS, *FrameWriter);
 
-    PatchItem PatchItems[] = {
-        {MemProfSectionStart, &RecordTableOffset, 1},
-        {MemProfSectionStart + sizeof(uint64_t), &FramePayloadOffset, 1},
-        {MemProfSectionStart + 2 * sizeof(uint64_t), &FrameTableOffset, 1},
-    };
-    OS.patch(PatchItems);
+    uint64_t Header[] = {RecordTableOffset, FramePayloadOffset,
+                         FrameTableOffset};
+    uint64_t HeaderUpdatePos = MemProfSectionStart;
+    if (MemProfVersionRequested == memprof::MemProfVersion1)
+      // The updates goes just after the version field.
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teresajohnson wrote:

"updates go"

https://github.com/llvm/llvm-project/pull/86414