commit 515564aa6ebeadc06eea03ff92aeda64727f1da5
author Kazu Hirata <kazu@google.com> Mon Apr 21 14:55:08 2025 -0700
committer GitHub <noreply@github.com> Mon Apr 21 14:55:08 2025 -0700
tree fc2253e15e1295fa7e5205d3eb2f284eefee9536
parent 3ceb3d96ff166305f015f1f00b2740e148347532

[AMDGPU] Partially revert my llvm::less_second patch (#136615)

This patch partially reverts:

  commit 5e1b0f97735083b6762834b83fdbb35e76002e03
  Author: Kazu Hirata <kazu@google.com>
  Date:   Fri Apr 18 10:05:55 2025 -0700

to fix:

  LLVM :: CodeGen/AMDGPU/sched-group-barrier-pipeline-solver.mir
  LLVM :: CodeGen/AMDGPU/sched-group-barrier-pre-RA.mir

under LLVM_ENABLE_EXPENSIVE_CHECKS.

llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp b/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp
index 8157156..87c1d25 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp
@@ -589,7 +589,7 @@
   }
 
   if (UseCostHeur)
-    llvm::sort(ReadyList, llvm::less_second());
+    std::sort(ReadyList.begin(), ReadyList.end(), llvm::less_second());
 
   assert(ReadyList.size() == CurrSU.second.size());
 }