[clang] [compiler-rt] [llvm] [PGO][AMDGPU] Add uniformity-aware offload profile format and instrumentation (PR #190708)

[Matt Arsenault via cfe-commits]

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@@ -827,6 +836,52 @@ Error RawInstrProfReader<IntPtrT>::readRawBitmapBytes(InstrProfRecord &Record) {
   return success();
 }
 
+template <class IntPtrT>
+Error RawInstrProfReader<IntPtrT>::readRawUniformCounters(
+    InstrProfRecord &Record) {
+  Record.UniformCounts.clear();
+
+  if (UniformCountersStart == UniformCountersEnd)
+    return success();
+
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arsenm wrote:

Missing tests for all these error conditions?

https://github.com/llvm/llvm-project/pull/190708