| ; RUN: llc -march=amdgcn -mcpu=SI -o - %s | FileCheck %s |
| ; Don't crash when the use of an undefined value is only detected by the |
| ; register coalescer because it is hidden with subregister insert/extract. |
| target triple="amdgcn--" |
| |
| ; CHECK-LABEL: foobar: |
| ; CHECK: s_load_dword s2, s[0:1], 0x9 |
| ; CHECK-NEXT: s_load_dwordx2 s[4:5], s[0:1], 0xb |
| ; CHECK-NEXT: s_waitcnt lgkmcnt(0) |
| ; CHECK-NEXT: v_mov_b32_e32 v0, s2 |
| ; CHECK-NEXT: s_and_saveexec_b64 s[2:3], s[0:1] |
| ; CHECK-NEXT: s_xor_b64 s[2:3], exec, s[2:3] |
| ; BB0_1: |
| ; CHECK: s_load_dword s6, s[0:1], 0xa |
| ; CHECK-NEXT: s_waitcnt lgkmcnt(0) |
| ; CHECK-NEXT: v_mov_b32_e32 v0, s6 |
| ; BB0_2: |
| ; CHECK: s_or_b64 exec, exec, s[2:3] |
| ; CHECK-NEXT: s_mov_b32 s7, 0xf000 |
| ; CHECK-NEXT: s_mov_b32 s6, -1 |
| ; CHECK-NEXT: buffer_store_dword v1, s[4:7], 0 |
| ; CHECK-NEXT: s_endpgm |
| define void @foobar(float %a0, float %a1, float addrspace(1)* %out) nounwind { |
| entry: |
| %v0 = insertelement <4 x float> undef, float %a0, i32 0 |
| br i1 undef, label %ift, label %ife |
| |
| ift: |
| %v1 = insertelement <4 x float> undef, float %a1, i32 0 |
| br label %ife |
| |
| ife: |
| %val = phi <4 x float> [ %v1, %ift ], [ %v0, %entry ] |
| %v2 = extractelement <4 x float> %val, i32 1 |
| store float %v2, float addrspace(1)* %out, align 4 |
| ret void |
| } |