================
@@ -894,22 +894,35 @@ struct InstrProfValueSiteRecord {
struct InstrProfRecord {
std::vector<uint64_t> Counts;
std::vector<uint8_t> BitmapBytes;
+ /// For AMDGPU offload profiling: 1 bit per basic block indicating whether
+ /// the block is entered via a wave-uniform branch. Set during merge when
+ /// per-slot counters are reduced. If a counter value is a multiple of the
+ /// wave size, the branch is considered wave-uniform.
+ std::vector<uint8_t> UniformityBits;
----------------
jmmartinez wrote:
Would it be possible to use `std::vector<bool>`? AFAIK it's specialized to pack
the elements into 1-bit.
https://github.com/llvm/llvm-project/pull/177665
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