[llvm] [NFC][AMDGPU] Pre-commit a test case that shows wrong reverse operation is used for V_CMPX_LE_U32 (PR #146527)

[Shilei Tian via llvm-commits]

https://github.com/shiltian created https://github.com/llvm/llvm-project/pull/146527

None

>From 65ddcbf047f7ea8d070f2df5d03720e151de2c3a Mon Sep 17 00:00:00 2001
From: Shilei Tian <i at tianshilei.me>
Date: Tue, 1 Jul 2025 09:30:51 -0400
Subject: [PATCH] [NFC][AMDGPU] Pre-commit a test case that shows wrong reverse
 operation is used for V_CMPX_LE_U32

---
 llvm/test/CodeGen/AMDGPU/cmp_shrink.mir | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/llvm/test/CodeGen/AMDGPU/cmp_shrink.mir b/llvm/test/CodeGen/AMDGPU/cmp_shrink.mir
index ae3fa153f381a..296903043bceb 100644
--- a/llvm/test/CodeGen/AMDGPU/cmp_shrink.mir
+++ b/llvm/test/CodeGen/AMDGPU/cmp_shrink.mir
@@ -10,3 +10,16 @@ body:             |
     ; GCN: S_CMP_LT_I32 65, 1, implicit-def $scc
     S_CMP_GT_I32 1, 65, implicit-def $scc
 ...
+
+---
+name:             shrink_icmp
+body:             |
+  bb.0:
+    ; GCN-LABEL: name: shrink_icmp
+    ; GCN: %op0:sgpr_32 = COPY $sgpr0
+    ; GCN-NEXT: %cond:sreg_64 = V_CMPX_LE_U32_e64 5, %op0, implicit-def $exec, implicit $exec
+    ; GCN-NEXT: S_NOP 0
+    %op0:sgpr_32 = COPY $sgpr0
+    %cond:sreg_64 = V_CMPX_LE_U32_e64 %op0, 5, implicit-def $exec, implicit $exec
+    S_NOP 0
+...