[llvm] 8cd917b - [AMDGPU] Skip debug uses in SIInsertWaitcnts::shouldFlushVmCnt (#160818)

[via llvm-commits]

Author: Jay Foad
Date: 2025-09-26T08:39:11+01:00
New Revision: 8cd917bc80eb9882cdc38d49ed82d855820d7e6c

URL: https://github.com/llvm/llvm-project/commit/8cd917bc80eb9882cdc38d49ed82d855820d7e6c
DIFF: https://github.com/llvm/llvm-project/commit/8cd917bc80eb9882cdc38d49ed82d855820d7e6c.diff

LOG: [AMDGPU] Skip debug uses in SIInsertWaitcnts::shouldFlushVmCnt (#160818)

Added: 
    

Modified: 
    llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
    llvm/test/CodeGen/AMDGPU/waitcnt-vmcnt-loop.mir

Removed: 
    


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diff  --git a/llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp b/llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
index 7ec98851d0bef..f291191dbfd5c 100644
--- a/llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
+++ b/llvm/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
@@ -2730,7 +2730,7 @@ bool SIInsertWaitcnts::shouldFlushVmCnt(MachineLoop *ML,
           HasVMemStore = true;
       }
       for (const MachineOperand &Op : MI.all_uses()) {
-        if (!TRI->isVectorRegister(*MRI, Op.getReg()))
+        if (Op.isDebug() || !TRI->isVectorRegister(*MRI, Op.getReg()))
           continue;
         RegInterval Interval = Brackets.getRegInterval(&MI, MRI, TRI, Op);
         // Vgpr use

diff  --git a/llvm/test/CodeGen/AMDGPU/waitcnt-vmcnt-loop.mir b/llvm/test/CodeGen/AMDGPU/waitcnt-vmcnt-loop.mir
index 0ddd2aa285b26..0d54bfaed8130 100644
--- a/llvm/test/CodeGen/AMDGPU/waitcnt-vmcnt-loop.mir
+++ b/llvm/test/CodeGen/AMDGPU/waitcnt-vmcnt-loop.mir
@@ -1,4 +1,5 @@
 # RUN: llc -mtriple=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck -check-prefix=GFX9 %s
+# RUN: llc -mtriple=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s -debugify-and-strip-all-safe | FileCheck -check-prefix=GFX9 %s
 # RUN: llc -mtriple=amdgcn -mcpu=gfx1010 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck -check-prefix=GFX10 %s
 # RUN: llc -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs -run-pass si-insert-waitcnts -o - %s | FileCheck -check-prefix=GFX12 %s