[llvm] AMDGPU: Use generated tests in reg-coalescer-sched-crash.ll test (PR #131259)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm updated https://github.com/llvm/llvm-project/pull/131259

>From 71c8ed8de30567a2e776a1f0d21a203431ac0299 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Fri, 14 Mar 2025 09:14:10 +0700
Subject: [PATCH] AMDGPU: Use generated tests in reg-coalescer-sched-crash.ll
 test

This wasn't checking anything. Also remove undef uses.
---
 .../AMDGPU/reg-coalescer-sched-crash.ll       | 68 +++++++++++++++++--
 1 file changed, 64 insertions(+), 4 deletions(-)

diff --git a/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll b/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll
index 51072c36dadd2..a3b3831f5b954 100644
--- a/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll
+++ b/llvm/test/CodeGen/AMDGPU/reg-coalescer-sched-crash.ll
@@ -1,5 +1,6 @@
-; RUN: llc -mtriple=amdgcn -verify-machineinstrs -o /dev/null < %s
-; RUN: llc -mtriple=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs -o /dev/null < %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 -check-prefix=GFX6 %s
+; RUN: llc -mtriple=amdgcn -mcpu=tonga < %s | FileCheck -check-prefix=GFX8 %s
 
 ; The register coalescer introduces a verifier error which later
 ; results in a crash during scheduling.
@@ -7,13 +8,72 @@
 declare i32 @llvm.amdgcn.workitem.id.x() #0
 
 define amdgpu_kernel void @reg_coalescer_breaks_dead(ptr addrspace(1) nocapture readonly %arg, i32 %arg1, i32 %arg2, i32 %arg3, i1 %c0) #1 {
+; GFX6-LABEL: reg_coalescer_breaks_dead:
+; GFX6:       ; %bb.0: ; %bb
+; GFX6-NEXT:    v_mov_b32_e32 v1, 0
+; GFX6-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v0
+; GFX6-NEXT:    v_mov_b32_e32 v2, 0
+; GFX6-NEXT:    s_and_saveexec_b64 s[0:1], vcc
+; GFX6-NEXT:    s_cbranch_execz .LBB0_2
+; GFX6-NEXT:  ; %bb.1: ; %bb3
+; GFX6-NEXT:    s_load_dword s2, s[4:5], 0xb
+; GFX6-NEXT:    s_load_dwordx2 s[6:7], s[4:5], 0x9
+; GFX6-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX6-NEXT:    s_ashr_i32 s3, s2, 31
+; GFX6-NEXT:    s_lshl_b64 s[2:3], s[2:3], 3
+; GFX6-NEXT:    s_add_u32 s2, s6, s2
+; GFX6-NEXT:    s_addc_u32 s3, s7, s3
+; GFX6-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
+; GFX6-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX6-NEXT:    v_mov_b32_e32 v1, s2
+; GFX6-NEXT:    v_mov_b32_e32 v2, s3
+; GFX6-NEXT:  .LBB0_2: ; %bb4
+; GFX6-NEXT:    s_or_b64 exec, exec, s[0:1]
+; GFX6-NEXT:    s_load_dword s0, s[4:5], 0xe
+; GFX6-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX6-NEXT:    s_bitcmp0_b32 s0, 0
+; GFX6-NEXT:    s_cbranch_scc1 .LBB0_4
+; GFX6-NEXT:  ; %bb.3: ; %bb15
+; GFX6-NEXT:    s_mov_b32 m0, -1
+; GFX6-NEXT:    ds_write_b64 v0, v[1:2]
+; GFX6-NEXT:  .LBB0_4: ; %bb16
+;
+; GFX8-LABEL: reg_coalescer_breaks_dead:
+; GFX8:       ; %bb.0: ; %bb
+; GFX8-NEXT:    v_mov_b32_e32 v1, 0
+; GFX8-NEXT:    v_cmp_eq_u32_e32 vcc, 0, v0
+; GFX8-NEXT:    v_mov_b32_e32 v2, 0
+; GFX8-NEXT:    s_and_saveexec_b64 s[0:1], vcc
+; GFX8-NEXT:    s_cbranch_execz .LBB0_2
+; GFX8-NEXT:  ; %bb.1: ; %bb3
+; GFX8-NEXT:    s_load_dword s2, s[4:5], 0x2c
+; GFX8-NEXT:    s_load_dwordx2 s[6:7], s[4:5], 0x24
+; GFX8-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX8-NEXT:    s_ashr_i32 s3, s2, 31
+; GFX8-NEXT:    s_lshl_b64 s[2:3], s[2:3], 3
+; GFX8-NEXT:    s_add_u32 s2, s6, s2
+; GFX8-NEXT:    s_addc_u32 s3, s7, s3
+; GFX8-NEXT:    s_load_dwordx2 s[2:3], s[2:3], 0x0
+; GFX8-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX8-NEXT:    v_mov_b32_e32 v1, s2
+; GFX8-NEXT:    v_mov_b32_e32 v2, s3
+; GFX8-NEXT:  .LBB0_2: ; %bb4
+; GFX8-NEXT:    s_or_b64 exec, exec, s[0:1]
+; GFX8-NEXT:    s_load_dword s0, s[4:5], 0x38
+; GFX8-NEXT:    s_waitcnt lgkmcnt(0)
+; GFX8-NEXT:    s_bitcmp0_b32 s0, 0
+; GFX8-NEXT:    s_cbranch_scc1 .LBB0_4
+; GFX8-NEXT:  ; %bb.3: ; %bb15
+; GFX8-NEXT:    s_mov_b32 m0, -1
+; GFX8-NEXT:    ds_write_b64 v0, v[1:2]
+; GFX8-NEXT:  .LBB0_4: ; %bb16
 bb:
   %id.x = call i32 @llvm.amdgcn.workitem.id.x()
   %cmp0 = icmp eq i32 %id.x, 0
   br i1 %cmp0, label %bb3, label %bb4
 
 bb3:                                              ; preds = %bb
-  %tmp = ashr exact i32 undef, 8
+  %tmp = ashr exact i32 poison, 8
   br label %bb6
 
 bb4:                                              ; preds = %bb6, %bb
@@ -28,7 +88,7 @@ bb6:                                              ; preds = %bb6, %bb3
   %tmp11 = getelementptr inbounds <2 x i32>, ptr addrspace(1) %arg, i64 %tmp10
   %tmp12 = load <2 x i32>, ptr addrspace(1) %tmp11, align 8
   %tmp13 = add <2 x i32> %tmp12, %tmp7
-  %tmp14 = icmp slt i32 undef, %arg2
+  %tmp14 = icmp slt i32 poison, %arg2
   br i1 %tmp14, label %bb6, label %bb4
 
 bb15:                                             ; preds = %bb4