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readcyclecounter.ll @5fecfa2

a164276
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN %s
; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=VI -check-prefix=GCN %s

declare i64 @llvm.readcyclecounter() #0

; GCN-LABEL: {{^}}test_readcyclecounter:
; SI-DAG: s_memtime s{{\[[0-9]+:[0-9]+\]}}
; VI-DAG: s_memrealtime s{{\[[0-9]+:[0-9]+\]}}
; GCN-DAG: s_load_dwordx2
; GCN: lgkmcnt
; GCN: buffer_store_dwordx2
; GCN-NOT: lgkmcnt
; SI: s_memtime s{{\[[0-9]+:[0-9]+\]}}
; VI: s_memrealtime s{{\[[0-9]+:[0-9]+\]}}
; GCN: buffer_store_dwordx2
define void @test_readcyclecounter(i64 addrspace(1)* %out) #0 {
  %cycle0 = call i64 @llvm.readcyclecounter()
  store volatile i64 %cycle0, i64 addrspace(1)* %out

  %cycle1 = call i64 @llvm.readcyclecounter()
  store volatile i64 %cycle1, i64 addrspace(1)* %out
  ret void
}

attributes #0 = { nounwind }