https://github.com/arsenm updated
https://github.com/llvm/llvm-project/pull/153024
>From e9fb98098503bbb660159e9eac1b6a6d5a5029c5 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <matthew.arsena...@amd.com>
Date: Mon, 11 Aug 2025 19:00:54 +0900
Subject: [PATCH] AMDGPU: Add statistic for number of MFMAs moved to AGPR form
---
llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp
b/llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp
index 639796c6cefff..78bd104ed2514 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp
@@ -26,6 +26,7 @@
#include "GCNSubtarget.h"
#include "SIMachineFunctionInfo.h"
#include "SIRegisterInfo.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/LiveIntervals.h"
#include "llvm/CodeGen/LiveRegMatrix.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
@@ -38,6 +39,9 @@ using namespace llvm;
namespace {
+STATISTIC(NumMFMAsRewrittenToAGPR,
+ "Number of MFMA instructions rewritten to use AGPR form");
+
class AMDGPURewriteAGPRCopyMFMAImpl {
MachineFunction &MF;
const GCNSubtarget &ST;
@@ -263,6 +267,7 @@ bool AMDGPURewriteAGPRCopyMFMAImpl::tryReassigningMFMAChain(
int NewMFMAOp =
AMDGPU::getMFMASrcCVDstAGPROp(RewriteCandidate->getOpcode());
RewriteCandidate->setDesc(TII.get(NewMFMAOp));
+ ++NumMFMAsRewrittenToAGPR;
}
return true;
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