llvm/test/CodeGen/AMDGPU/select64.ll

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

; GCN-LABEL: {{^}}select0:
; i64 select should be split into two i32 selects, and we shouldn't need
; to use a shfit to extract the hi dword of the input.
; GCN-NOT: s_lshr_b64
; GCN: s_cselect_b32
; GCN: s_cselect_b32
define amdgpu_kernel void @select0(ptr addrspace(1) %out, i32 %cond, i64 %in) {
entry:
  %0 = icmp ugt i32 %cond, 5
  %1 = select i1 %0, i64 0, i64 %in
  store i64 %1, ptr addrspace(1) %out
  ret void
}

; GCN-LABEL: {{^}}select_trunc_i64:
; GCN: s_cselect_b32
; GCN-NOT: s_cselect_b32
define amdgpu_kernel void @select_trunc_i64(ptr addrspace(1) %out, i32 %cond, i64 %in) nounwind {
  %cmp = icmp ugt i32 %cond, 5
  %sel = select i1 %cmp, i64 0, i64 %in
  %trunc = trunc i64 %sel to i32
  store i32 %trunc, ptr addrspace(1) %out, align 4
  ret void
}

; GCN-LABEL: {{^}}select_trunc_i64_2:
; GCN: s_cselect_b32
; GCN-NOT: s_cselect_b32
define amdgpu_kernel void @select_trunc_i64_2(ptr addrspace(1) %out, i32 %cond, i64 %a, i64 %b) nounwind {
  %cmp = icmp ugt i32 %cond, 5
  %sel = select i1 %cmp, i64 %a, i64 %b
  %trunc = trunc i64 %sel to i32
  store i32 %trunc, ptr addrspace(1) %out, align 4
  ret void
}

; GCN-LABEL: {{^}}v_select_trunc_i64_2:
; GCN: s_cselect_b32
; GCN-NOT: s_cselect_b32
define amdgpu_kernel void @v_select_trunc_i64_2(ptr addrspace(1) %out, i32 %cond, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) nounwind {
  %cmp = icmp ugt i32 %cond, 5
  %a = load i64, ptr addrspace(1) %aptr, align 8
  %b = load i64, ptr addrspace(1) %bptr, align 8
  %sel = select i1 %cmp, i64 %a, i64 %b
  %trunc = trunc i64 %sel to i32
  store i32 %trunc, ptr addrspace(1) %out, align 4
  ret void
}

; GCN-LABEL: {{^}}v_select_i64_split_imm:
; GCN-DAG: s_cselect_b32
; GCN-DAG: s_cselect_b32
; GCN: s_endpgm
define amdgpu_kernel void @v_select_i64_split_imm(ptr addrspace(1) %out, i32 %cond, ptr addrspace(1) %aptr, ptr addrspace(1) %bptr) nounwind {
  %cmp = icmp ugt i32 %cond, 5
  %a = load i64, ptr addrspace(1) %aptr, align 8
  %b = load i64, ptr addrspace(1) %bptr, align 8
  %sel = select i1 %cmp, i64 %a, i64 270582939648 ; 63 << 32
  store i64 %sel, ptr addrspace(1) %out, align 8
  ret void
}