File: bug_shuffle_vector_to_scalar.ll

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc -global-isel -mtriple=amdgcn-amd-amdhsa -mcpu=gfx900 < %s | FileCheck %s

; Description: an end-to-end IR test for https://github.com/llvm/llvm-project/issues/139752
; To test combine shuffle_vectors into build_vector

define amdgpu_gs <4 x float> @_amdgpu_gs_main() {
; CHECK-LABEL: _amdgpu_gs_main:
; CHECK:       ; %bb.0: ; %bb
; CHECK-NEXT:    v_mov_b32_e32 v0, 16
; CHECK-NEXT:    ds_read2_b32 v[0:1], v0 offset1:1
; CHECK-NEXT:    s_mov_b32 s0, 0
; CHECK-NEXT:    s_mov_b32 s1, s0
; CHECK-NEXT:    s_mov_b32 s2, s0
; CHECK-NEXT:    s_mov_b32 s3, s0
; CHECK-NEXT:    v_mov_b32_e32 v2, 0
; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
; CHECK-NEXT:    buffer_store_dwordx4 v[0:3], v2, s[0:3], 0 idxen
; CHECK-NEXT:    s_nop 0
; CHECK-NEXT:    v_mov_b32_e32 v0, v1
; CHECK-NEXT:    s_waitcnt vmcnt(0)
; CHECK-NEXT:    ; return to shader part epilog
bb:
  %i = load <1 x float>, ptr addrspace(3) getelementptr inbounds nuw (i8, ptr addrspace(3) null, i32 16), align 4
  %i1 = load <1 x float>, ptr addrspace(3) getelementptr inbounds nuw (i8, ptr addrspace(3) null, i32 20), align 4
  %i2 = shufflevector <1 x float> %i, <1 x float> zeroinitializer, <4 x i32> <i32 0, i32 poison, i32 poison, i32 poison>
  call void @llvm.amdgcn.struct.buffer.store.v4f32(<4 x float> %i2, <4 x i32> zeroinitializer, i32 0, i32 0, i32 0, i32 0)
  %i3 = shufflevector <1 x float> %i1, <1 x float> zeroinitializer, <4 x i32> <i32 0, i32 poison, i32 poison, i32 poison>
  ret <4 x float> %i3
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(write)
declare void @llvm.amdgcn.struct.buffer.store.v4f32(<4 x float>, <4 x i32>, i32, i32, i32, i32 immarg) #0