[llvm] AMDGPU: Switch test to generated checks (PR #131315)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm updated https://github.com/llvm/llvm-project/pull/131315

>From 9bace503d2d4cbf1bfb3e6c4f65a1ce4873d3dd8 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Fri, 14 Mar 2025 17:04:33 +0700
Subject: [PATCH] AMDGPU: Switch test to generated checks

I doubt this is testing what it originally intended anymore. Also
replace an undef.
---
 llvm/test/CodeGen/AMDGPU/subreg-eliminate-dead.ll | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/llvm/test/CodeGen/AMDGPU/subreg-eliminate-dead.ll b/llvm/test/CodeGen/AMDGPU/subreg-eliminate-dead.ll
index 59ad6f6139ace..2efcb411cf0ee 100644
--- a/llvm/test/CodeGen/AMDGPU/subreg-eliminate-dead.ll
+++ b/llvm/test/CodeGen/AMDGPU/subreg-eliminate-dead.ll
@@ -1,16 +1,19 @@
-; RUN: llc -mtriple=amdgcn-- -verify-machineinstrs -o - %s | FileCheck %s
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=amdgcn-- -mcpu=tahiti < %s | FileCheck %s
 ; LiveRangeEdit::eliminateDeadDef did not update LiveInterval sub ranges
 ; properly.
 
 ; Just make sure this test doesn't crash.
-; CHECK-LABEL: foobar:
-; CHECK: s_endpgm
 define amdgpu_kernel void @foobar() {
+; CHECK-LABEL: foobar:
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    s_endpgm
   %v0 = icmp eq <4 x i32> poison, <i32 0, i32 1, i32 2, i32 3>
   %v3 = sext <4 x i1> %v0 to <4 x i32>
   %v4 = extractelement <4 x i32> %v3, i32 1
   %v5 = icmp ne i32 %v4, 0
-  %v6 = select i1 %v5, i32 undef, i32 0
+  %undef = freeze i32 poison
+  %v6 = select i1 %v5, i32 %undef, i32 0
   %v15 = insertelement <2 x i32> poison, i32 %v6, i32 1
   store <2 x i32> %v15, ptr addrspace(1) poison, align 8
   ret void