[llvm] [AMDGPU][LTO] Assume closed world after linking (PR #105845)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx-nvidia-ubuntu` running on `as-builder-7` while building `llvm` at step 6 "test-build-unified-tree-check-llvm".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/180/builds/3894

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>
```
Step 6 (test-build-unified-tree-check-llvm) failure: test (failure)
******************** TEST 'LLVM :: LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 1: /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/opt -O3 -debug-only=amdgpu-attributor -S -o - /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll 2>&1 | /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/FileCheck /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll --check-prefix=PRE-LINK
+ /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/opt -O3 -debug-only=amdgpu-attributor -S -o - /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll
+ /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/FileCheck /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll --check-prefix=PRE-LINK
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll:6:13: error: PRE-LINK: expected string not found in input
; PRE-LINK: Module {{.*}} is not assumed to be a closed world.
            ^
<stdin>:1:1: note: scanning from here
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/opt: warning: failed to infer data layout: unable to get target for 'amdgcn-amd-amdhsa', see --version and --triple.
^
<stdin>:1:100: note: possible intended match here
/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/opt: warning: failed to infer data layout: unable to get target for 'amdgcn-amd-amdhsa', see --version and --triple.
                                                                                                   ^

Input file: <stdin>
Check file: /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll

-dump-input=help explains the following input dump.

Input was:
<<<<<<
           1: /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/opt: warning: failed to infer data layout: unable to get target for 'amdgcn-amd-amdhsa', see --version and --triple. 
check:6'0     X~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ error: no match found
check:6'1                                                                                                        ?                                                                                                possible intended match
           2: /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/build/bin/opt: WARNING: failed to create target machine for 'amdgcn-amd-amdhsa': unable to get target for 'amdgcn-amd-amdhsa', see --version and --triple. 
check:6'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           3: ; ModuleID = '/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll' 
check:6'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           4: source_filename = "/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx-nvidia-ubuntu/llvm-project/llvm/test/LTO/AMDGPU/gpu-rdc-amdgpu-attrs.ll" 
check:6'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           5: target triple = "amdgcn-amd-amdhsa" 
check:6'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           6:  
check:6'0     ~
           .
           .
           .
>>>>>>

--

********************


```
</details>

https://github.com/llvm/llvm-project/pull/105845