llvm/test/CodeGen/AMDGPU/readcyclecounter.ll

; RUN: llc -global-isel=0 -mtriple=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck -check-prefix=MEMTIME -check-prefix=SIVI -check-prefix=GCN %s
; -global-isel=1 SI run line skipped since store not yet implemented.
; RUN: llc -global-isel=0 -mtriple=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=MEMTIME -check-prefix=SIVI -check-prefix=GCN %s
; RUN: llc -global-isel=1 -mtriple=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=MEMTIME -check-prefix=SIVI -check-prefix=GCN %s
; RUN: llc -global-isel=0 -mtriple=amdgcn -mcpu=gfx1010 -verify-machineinstrs < %s | FileCheck -check-prefix=MEMTIME -check-prefix=GCN %s
; RUN: llc -global-isel=1 -mtriple=amdgcn -mcpu=gfx1010 -verify-machineinstrs < %s | FileCheck -check-prefix=MEMTIME -check-prefix=GCN %s
; RUN: llc -global-isel=0 -mtriple=amdgcn -mcpu=gfx1030 -verify-machineinstrs < %s | FileCheck -check-prefixes=MEMTIME -check-prefix=GCN %s
; RUN: llc -global-isel=1 -mtriple=amdgcn -mcpu=gfx1030 -verify-machineinstrs < %s | FileCheck -check-prefixes=MEMTIME -check-prefix=GCN %s
; RUN: llc -global-isel=0 -mtriple=amdgcn -mcpu=gfx1100 -verify-machineinstrs -amdgpu-enable-vopd=0 < %s | FileCheck -check-prefixes=GETREG,GETREG-SDAG -check-prefix=GCN %s
; RUN: llc -global-isel=1 -mtriple=amdgcn -mcpu=gfx1100 -verify-machineinstrs -amdgpu-enable-vopd=0 < %s | FileCheck -check-prefixes=GETREG,GETREG-GISEL -check-prefix=GCN %s
; RUN: llc -global-isel=0 -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX12 %s
; RUN: llc -global-isel=1 -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX12 %s

declare i64 @llvm.readcyclecounter() #0

; GCN-LABEL: {{^}}test_readcyclecounter:
; MEMTIME-DAG: s_memtime s{{\[[0-9]+:[0-9]+\]}}
; GCN-DAG:     s_load_{{dwordx2|b64}}
; GFX12:       s_getreg_b32 [[HI1:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES_HI)
; GFX12:       s_getreg_b32 [[LO1:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES_LO)
; GFX12:       s_getreg_b32 [[HI2:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES_HI)
; GFX12:       s_cmp_eq_u32 [[HI1]], [[HI2]]
; GFX12:       s_cselect_b32 {{s[0-9]+}}, [[LO1]], 0
; GCN-DAG:     kmcnt
; MEMTIME:     store_dwordx2
; SIVI-NOT:    kmcnt
; MEMTIME:     s_memtime s{{\[[0-9]+:[0-9]+\]}}
; MEMTIME:     store_dwordx2

; GETREG-GISEL-DAG:  s_mov_b32 s[[SZERO:[0-9]+]], 0
; GETREG-GISEL-DAG:  v_mov_b32_e32 v[[ZERO:[0-9]+]], s[[SZERO]]
; GETREG-SDAG-DAG:  v_mov_b32_e32 v[[ZERO:[0-9]+]], 0
; GETREG-DAG:  s_getreg_b32 [[CNT1:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES, 0, 20)
; GETREG-DAG:  v_mov_b32_e32 v[[VCNT1:[0-9]+]], [[CNT1]]
; GETREG:      global_store_{{dwordx2|b64}} v{{.+}}, v[[[VCNT1]]:[[ZERO]]]
; GETREG:      s_getreg_b32 [[CNT2:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES, 0, 20)
; GETREG:      v_mov_b32_e32 v[[VCNT2:[0-9]+]], [[CNT2]]
; GETREG:      global_store_{{dwordx2|b64}} v{{.+}}, v[[[VCNT2]]:[[ZERO]]]

define amdgpu_kernel void @test_readcyclecounter(ptr addrspace(1) %out) #0 {
  %cycle0 = call i64 @llvm.readcyclecounter()
  store volatile i64 %cycle0, ptr addrspace(1) %out

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

; This test used to crash in ScheduleDAG.
;
; GCN-LABEL: {{^}}test_readcyclecounter_smem:
; MEMTIME-DAG: s_memtime
; GFX12:       s_getreg_b32 [[HI1:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES_HI)
; GFX12:       s_getreg_b32 [[LO1:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES_LO)
; GFX12:       s_getreg_b32 [[HI2:s[0-9]+]], hwreg(HW_REG_SHADER_CYCLES_HI)
; GCN-DAG:     s_load_{{dword|b32|b64}}
; GETREG-DAG:  s_getreg_b32 s{{[0-9]+}}, hwreg(HW_REG_SHADER_CYCLES, 0, 20)
; GFX12:       s_cmp_eq_u32 [[HI1]], [[HI2]]
; GFX12:       s_cselect_b32 {{s[0-9]+}}, [[LO1]], 0
define amdgpu_cs i32 @test_readcyclecounter_smem(ptr addrspace(4) inreg %in) #0 {
  %cycle0 = call i64 @llvm.readcyclecounter()
  %in.v = load i64, ptr addrspace(4) %in
  %r.64 = add i64 %cycle0, %in.v
  %r.32 = trunc i64 %r.64 to i32
  ret i32 %r.32
}

attributes #0 = { nounwind }