llvm/test/CodeGen/AMDGPU/memcpy_const_compare.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a < %s | FileCheck %s

; Test mempcy lowering where length is given by a complex but constant expression.
; Loop guard should not be necessary since length is positive.

@src_array = global [128 x i8] zeroinitializer, align 1
@dst_array = global [128 x i8] zeroinitializer, align 1

define amdgpu_kernel void @_start() {
; CHECK-LABEL: _start:
; CHECK:       ; %bb.0:
; CHECK-NEXT:    s_add_u32 flat_scratch_lo, s12, s17
; CHECK-NEXT:    s_addc_u32 flat_scratch_hi, s13, 0
; CHECK-NEXT:    s_mov_b64 s[0:1], 0
; CHECK-NEXT:  .LBB0_1: ; %dynamic-memcpy-expansion-main-body
; CHECK-NEXT:    ; =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    s_getpc_b64 s[2:3]
; CHECK-NEXT:    s_add_u32 s2, s2, src_array@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s3, s3, src_array@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_add_u32 s2, s2, s0
; CHECK-NEXT:    s_addc_u32 s3, s3, s1
; CHECK-NEXT:    v_pk_mov_b32 v[0:1], s[2:3], s[2:3] op_sel:[0,1]
; CHECK-NEXT:    flat_load_dwordx4 v[2:5], v[0:1]
; CHECK-NEXT:    s_getpc_b64 s[2:3]
; CHECK-NEXT:    s_add_u32 s2, s2, dst_array@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s3, s3, dst_array@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_add_u32 s2, s2, s0
; CHECK-NEXT:    s_addc_u32 s3, s3, s1
; CHECK-NEXT:    s_add_u32 s0, s0, 16
; CHECK-NEXT:    s_addc_u32 s1, s1, 0
; CHECK-NEXT:    v_pk_mov_b32 v[0:1], s[2:3], s[2:3] op_sel:[0,1]
; CHECK-NEXT:    v_cmp_lt_u64_e64 s[2:3], s[0:1], 16
; CHECK-NEXT:    s_and_b64 vcc, exec, s[2:3]
; CHECK-NEXT:    s_waitcnt vmcnt(0)
; CHECK-NEXT:    flat_store_dwordx4 v[0:1], v[2:5]
; CHECK-NEXT:    s_cbranch_vccnz .LBB0_1
; CHECK-NEXT:  ; %bb.2: ; %dynamic-memcpy-expansion-residual-cond
; FIXME: Compare should be evaluated at compile time
; CHECK-NEXT:    s_cmp_eq_u64 13, 0
; CHECK-NEXT:    s_cbranch_scc1 .LBB0_5
; CHECK-NEXT:  ; %bb.3: ; %dynamic-memcpy-expansion-residual-body.preheader
; CHECK-NEXT:    s_sub_u32 s4, 29, 13
; CHECK-NEXT:    s_subb_u32 s5, 0, 0
; CHECK-NEXT:    s_getpc_b64 s[0:1]
; CHECK-NEXT:    s_add_u32 s0, s0, src_array@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s1, s1, src_array@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x0
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_add_u32 s2, s0, s4
; CHECK-NEXT:    s_addc_u32 s3, s1, s5
; CHECK-NEXT:    s_getpc_b64 s[0:1]
; CHECK-NEXT:    s_add_u32 s0, s0, dst_array@gotpcrel32@lo+4
; CHECK-NEXT:    s_addc_u32 s1, s1, dst_array@gotpcrel32@hi+12
; CHECK-NEXT:    s_load_dwordx2 s[0:1], s[0:1], 0x0
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    s_add_u32 s4, s0, s4
; CHECK-NEXT:    s_addc_u32 s5, s1, s5
; CHECK-NEXT:    s_mov_b64 s[0:1], 0
; CHECK-NEXT:  .LBB0_4: ; %dynamic-memcpy-expansion-residual-body
; CHECK-NEXT:    ; =>This Inner Loop Header: Depth=1
; CHECK-NEXT:    s_add_u32 s6, s2, s0
; CHECK-NEXT:    s_addc_u32 s7, s3, s1
; CHECK-NEXT:    v_pk_mov_b32 v[0:1], s[6:7], s[6:7] op_sel:[0,1]
; CHECK-NEXT:    flat_load_ubyte v2, v[0:1]
; CHECK-NEXT:    s_add_u32 s6, s4, s0
; CHECK-NEXT:    s_addc_u32 s7, s5, s1
; CHECK-NEXT:    s_add_u32 s0, s0, 1
; CHECK-NEXT:    s_addc_u32 s1, s1, 0
; CHECK-NEXT:    v_pk_mov_b32 v[0:1], s[6:7], s[6:7] op_sel:[0,1]
; CHECK-NEXT:    v_cmp_lt_u64_e64 s[6:7], s[0:1], 13
; CHECK-NEXT:    s_and_b64 vcc, exec, s[6:7]
; CHECK-NEXT:    s_waitcnt vmcnt(0) lgkmcnt(0)
; CHECK-NEXT:    flat_store_byte v[0:1], v2
; CHECK-NEXT:    s_cbranch_vccnz .LBB0_4
; CHECK-NEXT:  .LBB0_5: ; %dynamic-memcpy-post-expansion
; CHECK-NEXT:    s_endpgm
  %src_ptr = getelementptr inbounds [128 x i8], ptr @src_array, i64 0, i64 0
  %dst_ptr = getelementptr inbounds [128 x i8], ptr @dst_array, i64 0, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr %dst_ptr, ptr %src_ptr, i64 add (i64 sub (i64 16, i64 ptrtoint (ptr addrspacecast (ptr addrspace(4) null to ptr) to i64)), i64 13), i1 false)
  ret void
}

declare void @llvm.memcpy.p0.p4.i64(ptr noalias writeonly captures(none), ptr addrspace(4) noalias readonly captures(none), i64, i1 immarg) #0

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }