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1bcd37150d
This matches the behavior of the HSAIL clock instruction. s_realmemtime is used if the subtarget supports it, and falls back to s_memtime if not. Also introduces new intrinsics for each of s_memtime / s_memrealtime. llvm-svn: 262119
26 lines
893 B
LLVM
26 lines
893 B
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=GCN %s
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; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=VI -check-prefix=GCN %s
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declare i64 @llvm.readcyclecounter() #0
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; GCN-LABEL: {{^}}test_readcyclecounter:
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; SI-DAG: s_memtime s{{\[[0-9]+:[0-9]+\]}}
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; VI-DAG: s_memrealtime s{{\[[0-9]+:[0-9]+\]}}
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; GCN-DAG: s_load_dwordx2
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; GCN: lgkmcnt
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; GCN: buffer_store_dwordx2
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; GCN-NOT: lgkmcnt
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; SI: s_memtime s{{\[[0-9]+:[0-9]+\]}}
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; VI: s_memrealtime s{{\[[0-9]+:[0-9]+\]}}
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; GCN: buffer_store_dwordx2
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define void @test_readcyclecounter(i64 addrspace(1)* %out) #0 {
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%cycle0 = call i64 @llvm.readcyclecounter()
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store volatile i64 %cycle0, i64 addrspace(1)* %out
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%cycle1 = call i64 @llvm.readcyclecounter()
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store volatile i64 %cycle1, i64 addrspace(1)* %out
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ret void
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}
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attributes #0 = { nounwind }
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