[llvm] [AMDGPU] Add AGPR pressure tracking (PR #214745)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/lib/Target/AMDGPU/AMDGPUCoExecSchedStrategy.cpp llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp llvm/lib/Target/AMDGPU/GCNSchedStrategy.h --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp b/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
index 3e11c0b2a..05477393a 100644
--- a/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
+++ b/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
@@ -447,7 +447,7 @@ void GCNSchedStrategy::initCandidate(SchedCandidate &Cand, SUnit *SU,
   int SGPRDelta = NewSGPRPressure - SGPRCriticalLimit;
   int VGPRDelta = NewVGPRPressure - VGPRCriticalLimit;
   int AGPRDelta = AGPRExcessLimit > 0 ? NewAGPRPressure - AGPRCriticalLimit
-                                     : std::numeric_limits<int>::min();
+                                      : std::numeric_limits<int>::min();
 
   if (SGPRDelta >= 0 || VGPRDelta >= 0 || AGPRDelta >= 0) {
     HasHighPressure = true;

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https://github.com/llvm/llvm-project/pull/214745