[llvm] [AMDGPU][SIPreEmitPeephole] mustRetainExeczBranch: estimate ThenBlock cost using MachineTraceInfo (PR #111117)

[Juan Manuel Martinez Caamaño via llvm-commits]

jmmartinez wrote:

Tested some variations of this proposal with hecbench and didn't see any significant improvement.

https://github.com/llvm/llvm-project/pull/111117