[clang] [llvm] [AMDGPU][True16][MC][CodeGen] true16 for v_alignbyte_b32 (PR #119750)

[Joe Nash via llvm-commits]

================
@@ -1,10 +1,48 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc -mtriple=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -mattr=+real-true16 -verify-machineinstrs < %s | FileCheck -check-prefixes=GFX11-TRUE16 %s
+; RUN: llc -mtriple=amdgcn -mcpu=gfx1100 -mattr=-real-true16 -verify-machineinstrs < %s | FileCheck -check-prefixes=GFX11-FAKE16 %s
 
 declare i32 @llvm.amdgcn.alignbyte(i32, i32, i32) #0
 
-; GCN-LABEL: {{^}}v_alignbyte_b32:
-; GCN: v_alignbyte_b32 {{[vs][0-9]+}}, {{[vs][0-9]+}}, {{[vs][0-9]+}}
 define amdgpu_kernel void @v_alignbyte_b32(ptr addrspace(1) %out, i32 %src1, i32 %src2, i32 %src3) #1 {
+; GCN-LABEL: v_alignbyte_b32:
+; GCN:       ; %bb.0:
+; GCN-NEXT:    s_load_dwordx4 s[0:3], s[4:5], 0xb
+; GCN-NEXT:    s_load_dwordx2 s[4:5], s[4:5], 0x9
+; GCN-NEXT:    s_mov_b32 s7, 0xf000
+; GCN-NEXT:    s_mov_b32 s6, -1
+; GCN-NEXT:    s_waitcnt lgkmcnt(0)
+; GCN-NEXT:    v_mov_b32_e32 v0, s1
+; GCN-NEXT:    v_mov_b32_e32 v1, s2
+; GCN-NEXT:    v_alignbyte_b32 v0, s0, v0, v1
+; GCN-NEXT:    buffer_store_dword v0, off, s[4:7], 0
+; GCN-NEXT:    s_endpgm
+;
+; GFX11-TRUE16-LABEL: v_alignbyte_b32:
+; GFX11-TRUE16:       ; %bb.0:
+; GFX11-TRUE16-NEXT:    s_clause 0x1
+; GFX11-TRUE16-NEXT:    s_load_b128 s[0:3], s[4:5], 0x2c
+; GFX11-TRUE16-NEXT:    s_load_b64 s[4:5], s[4:5], 0x24
+; GFX11-TRUE16-NEXT:    v_mov_b32_e32 v1, 0
+; GFX11-TRUE16-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX11-TRUE16-NEXT:    v_mov_b16_e32 v0.l, s2
+; GFX11-TRUE16-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GFX11-TRUE16-NEXT:    v_alignbyte_b32 v0, s0, s1, v0.l
----------------
Sisyph wrote:

Nit: Can you add another test in this file where s0 and s1 are vgpr arguments instead, so we can see if s2 can be folded into src2 of alignbyte?

https://github.com/llvm/llvm-project/pull/119750