llvm/test/CodeGen/AMDGPU/i1-copy-from-loop.ll

; RUN: llc -mtriple=amdgcn-- -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s
; RUN: llc -mtriple=amdgcn-- -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI %s

; SI-LABEL: {{^}}i1_copy_from_loop:
;
; SI: ; %for.body
; SI:      v_cmp_gt_u32_e64  [[CC_SREG:s\[[0-9]+:[0-9]+\]]], 4,
; SI-DAG:  s_andn2_b64       [[CC_ACCUM:s\[[0-9]+:[0-9]+\]]], [[CC_ACCUM]], exec
; SI-DAG:  s_and_b64         [[CC_MASK:s\[[0-9]+:[0-9]+\]]], [[CC_SREG]], exec
; SI:      s_or_b64          [[CC_ACCUM]], [[CC_ACCUM]], [[CC_MASK]]

; SI: ; %Flow1
; SI:      s_or_b64          [[CC_ACCUM]], [[CC_ACCUM]], exec

; SI: ; %Flow
; SI-DAG:  s_andn2_b64       [[LCSSA_ACCUM:s\[[0-9]+:[0-9]+\]]], [[LCSSA_ACCUM]], exec
; SI-DAG:  s_and_b64         [[CC_MASK2:s\[[0-9]+:[0-9]+\]]], [[CC_ACCUM]], exec
; SI:      s_or_b64          [[LCSSA_ACCUM]], [[LCSSA_ACCUM]], [[CC_MASK2]]

; SI: ; %for.end
; SI:      s_and_saveexec_b64 {{s\[[0-9]+:[0-9]+\]}}, [[LCSSA_ACCUM]]

define amdgpu_ps void @i1_copy_from_loop(<4 x i32> inreg %rsrc, i32 %tid) {
entry:
  br label %for.body

for.body:
  %i = phi i32 [0, %entry], [%i.inc, %end.loop]
  %cc = icmp ult i32 %i, 4
  br i1 %cc, label %mid.loop, label %for.end

mid.loop:
  %v = call float @llvm.amdgcn.buffer.load.f32(<4 x i32> %rsrc, i32 %tid, i32 %i, i1 false, i1 false)
  %cc2 = fcmp oge float %v, 0.0
  br i1 %cc2, label %end.loop, label %for.end

end.loop:
  %i.inc = add i32 %i, 1
  br label %for.body

for.end:
  br i1 %cc, label %if, label %end

if:
  call void @llvm.amdgcn.exp.f32(i32 0, i32 15, float undef, float undef, float undef, float undef, i1 true, i1 true)
  br label %end

end:
  ret void
}

declare float @llvm.amdgcn.buffer.load.f32(<4 x i32>, i32, i32, i1, i1) #0
declare void @llvm.amdgcn.exp.f32(i32, i32, float, float, float, float, i1, i1) #1

attributes #0 = { nounwind readonly }
attributes #1 = { nounwind inaccessiblememonly }