llvm-project

b35f4068 - [MemProf] Change the STACK_ID record to fixed width values (#116448)

[MemProf] Change the STACK_ID record to fixed width values (#116448) The stack ids are hashes that are close to 64 bits in size, so emitting as a pair of 32-bit fixed-width values is more efficient than a VBR. This reduced the summary bitcode size for a large target by about 1%. Bump the index version and ensure we can read the old format.