[llvm] Reland "[amdgpu] Add llvm.amdgcn.init.whole.wave intrinsic" (#108054)" (PR #108173)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-debian-cpp20` running on `clang-debian-cpp20` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/108/builds/3613

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'LLVM :: CodeGen/AMDGPU/si-init-whole-wave.mir' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 2: /vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs -run-pass si-wqm -o -  /vol/worker/clang-debian-cpp20/clang-debian-cpp20/llvm-project/llvm/test/CodeGen/AMDGPU/si-init-whole-wave.mir | /vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/FileCheck /vol/worker/clang-debian-cpp20/clang-debian-cpp20/llvm-project/llvm/test/CodeGen/AMDGPU/si-init-whole-wave.mir
+ /vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs -run-pass si-wqm -o - /vol/worker/clang-debian-cpp20/clang-debian-cpp20/llvm-project/llvm/test/CodeGen/AMDGPU/si-init-whole-wave.mir
+ /vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/FileCheck /vol/worker/clang-debian-cpp20/clang-debian-cpp20/llvm-project/llvm/test/CodeGen/AMDGPU/si-init-whole-wave.mir
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc -mtriple=amdgcn -mcpu=gfx1200 -verify-machineinstrs -run-pass si-wqm -o - /vol/worker/clang-debian-cpp20/clang-debian-cpp20/llvm-project/llvm/test/CodeGen/AMDGPU/si-init-whole-wave.mir
 #0 0x0000594ef9b45668 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0x35eb668)
 #1 0x0000594ef9b430dd llvm::sys::RunSignalHandlers() (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0x35e90dd)
 #2 0x0000594ef9b45c08 SignalHandler(int) Signals.cpp:0:0
 #3 0x00007c78491db510 (/lib/x86_64-linux-gnu/libc.so.6+0x3c510)
 #4 0x0000594ef75c62c9 llvm::SIInstrInfo::fixImplicitOperands(llvm::MachineInstr&) const (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0x106c2c9)
 #5 0x0000594ef75402da llvm::GCNSubtarget::mirFileLoaded(llvm::MachineFunction&) const (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0xfe62da)
 #6 0x0000594ef938ec03 llvm::MIRParserImpl::initializeMachineFunction(llvm::yaml::MachineFunction const&, llvm::MachineFunction&) (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0x2e34c03)
 #7 0x0000594ef938de52 llvm::MIRParserImpl::parseMachineFunction(llvm::Module&, llvm::MachineModuleInfo&, llvm::AnalysisManager<llvm::Module>*) (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0x2e33e52)
 #8 0x0000594ef9393e70 llvm::MIRParser::parseMachineFunctions(llvm::Module&, llvm::MachineModuleInfo&) (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0x2e39e70)
 #9 0x0000594ef70480f0 main (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0xaee0f0)
#10 0x00007c78491c66ca (/lib/x86_64-linux-gnu/libc.so.6+0x276ca)
#11 0x00007c78491c6785 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x27785)
#12 0x0000594ef7042021 _start (/vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/llc+0xae8021)
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /vol/worker/clang-debian-cpp20/clang-debian-cpp20/build/bin/FileCheck /vol/worker/clang-debian-cpp20/clang-debian-cpp20/llvm-project/llvm/test/CodeGen/AMDGPU/si-init-whole-wave.mir

--

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


```

</details>

https://github.com/llvm/llvm-project/pull/108173