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AMDGPU: Add statistic for number of MFMAs moved to AGPR form #153024

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AMDGPU: Add statistic for number of MFMAs moved to AGPR form #153024

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5 changes: 5 additions & 0 deletions llvm/lib/Target/AMDGPU/AMDGPURewriteAGPRCopyMFMA.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -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"
Expand All @@ -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;
Expand Down Expand Up @@ -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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