[llvm] [AMDGPU] Add test for failure with function !dbg info in amdgpu-lower-kernel-arguments (PR #126146)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,27 @@
+; RUN: not --crash opt -mtriple=amdgcn-amd-amdhsa -mcpu=gfx940 -passes='amdgpu-attributor,function(amdgpu-lower-kernel-arguments)' -amdgpu-kernarg-preload-count=16 -S < %s 2>&1 | FileCheck %s
+
+; CHECK: function declaration may only have a unique !dbg attachment
+; CHECK-NEXT: ptr @0
+
+define amdgpu_kernel void @preload_block_count_x(ptr addrspace(1) %out) !dbg !4 {
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arsenm wrote:

Add another test metadata that should be preserved, like !max_work_group_size

https://github.com/llvm/llvm-project/pull/126146