phoebewang wrote:

> > LLVM Buildbot has detected a new failure on builder 
> > `llvm-clang-x86_64-expensive-checks-ubuntu` running on `as-builder-4` while 
> > building `clang,llvm` at step 7 "test-check-all".
> > Full details are available at: 
> > https://lab.llvm.org/buildbot/#/builders/187/builds/17441
> > Here is the relevant piece of the build log for the reference
> > ```
> > Step 7 (test-check-all) failure: Test just built components: check-all 
> > completed (failure)
> > ******************** TEST 'LLVM :: CodeGen/X86/reserveRreg.ll' FAILED 
> > ********************
> > Exit Code: 2
> > 
> > Command Output (stdout):
> > --
> > # RUN: at line 4
> > /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc < 
> > /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/CodeGen/X86/reserveRreg.ll
> >  -mtriple=x86_64-unknown-linux-gnu | 
> > /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/FileCheck
> >  
> > /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/llvm-project/llvm/test/CodeGen/X86/reserveRreg.ll
> > # executed command: 
> > /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc 
> > -mtriple=x86_64-unknown-linux-gnu
> > # .---command stderr------------
> > # | 
> > # | # After Peephole Optimizations
> > # | # Machine code for function t16: IsSSA, TracksLiveness
> > # | 
> > # | bb.0 (%ir-block.0):
> > # |   $r16 = MOV32ri64 256
> > # |   INLINEASM &"" [sideeffect] [attdialect], $0:[regdef], implicit-def 
> > $r16, $1:[reguse], $r16
> > # |   RET 0
> > # | 
> > # | # End machine code for function t16.
> > # | 
> > # | *** Bad machine code: Illegal physical register for instruction ***
> > # | - function:    t16
> > # | - basic block: %bb.0  (0x58eb82267f38)
> > # | - instruction: $r16 = MOV32ri64 256
> > # | - operand 0:   $r16
> > # | $r16 is not a GR64_NOREX2 register.
> > # | LLVM ERROR: Found 1 machine code errors.
> > # | PLEASE submit a bug report to 
> > https://github.com/llvm/llvm-project/issues/ and include the crash 
> > backtrace and instructions to reproduce the bug.
> > # | Stack dump:
> > # | 0.      Program arguments: 
> > /home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc 
> > -mtriple=x86_64-unknown-linux-gnu
> > # | 1.      Running pass 'Function Pass Manager' on module '<stdin>'.
> > # | 2.      Running pass 'Verify generated machine code' on function '@t16'
> > # |  #0 0x000058eb6f34d978 llvm::sys::PrintStackTrace(llvm::raw_ostream&, 
> > int) 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x86c9978)
> > # |  #1 0x000058eb6f34a8e5 llvm::sys::RunSignalHandlers() 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x86c68e5)
> > # |  #2 0x000058eb6f34e7d1 SignalHandler(int, siginfo_t*, void*) 
> > Signals.cpp:0:0
> > # |  #3 0x0000743381845330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
> > # |  #4 0x000074338189eb2c pthread_kill 
> > (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
> > # |  #5 0x000074338184527e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
> > # |  #6 0x00007433818288ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
> > # |  #7 0x000058eb6f2aa8d5 llvm::report_fatal_error(llvm::Twine const&, 
> > bool) 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x86268d5)
> > # |  #8 0x000058eb6e120f2b 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x749cf2b)
> > # |  #9 0x000058eb6e121edf (anonymous 
> > namespace)::MachineVerifierLegacyPass::runOnMachineFunction(llvm::MachineFunction&)
> >  MachineVerifier.cpp:0:0
> > # | #10 0x000058eb6dffda03 
> > llvm::MachineFunctionPass::runOnFunction(llvm::Function&) 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x7379a03)
> > # | #11 0x000058eb6e572beb 
> > llvm::FPPassManager::runOnFunction(llvm::Function&) 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x78eebeb)
> > # | #12 0x000058eb6e57ac62 llvm::FPPassManager::runOnModule(llvm::Module&) 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x78f6c62)
> > # | #13 0x000058eb6e57370a 
> > llvm::legacy::PassManagerImpl::run(llvm::Module&) 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x78ef70a)
> > # | #14 0x000058eb6bd579ef compileModule(char**, 
> > llvm::SmallVectorImpl<llvm::PassPlugin>&, llvm::LLVMContext&, 
> > std::__cxx11::basic_string<char, std::char_traits<char>, 
> > std::allocator<char>>&) llc.cpp:0:0
> > # | #15 0x000058eb6bd54cc3 main 
> > (/home/buildbot/worker/as-builder-4/ramdisk/expensive-checks/build/bin/llc+0x50d0cc3)
> > # | #16 0x000074338182a1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
> > # | #17 0x000074338182a28b __libc_start_main 
> > (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
> > ...
> > ```
> 
> Seems like MOV32ri64 is not valid for EGPR register now, do you think it 
> should be fixed to valid now? Or maybe I can avoid using it in the new added 
> littest first? @RKSimon @phoebewang

I created https://github.com/llvm/llvm-project/pull/184550 to fix this.

https://github.com/llvm/llvm-project/pull/180242
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