[llvm] [DebugInfo] Allow DISubrange/DIGenericSubrange without count/upperBound. (PR #96474)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-nvptx64-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/160/builds/1378

Here is the relevant piece of the build log for the reference:
```
Step 6 (test-build-unified-tree-check-llvm) failure: test (failure)
******************** TEST 'LLVM :: DebugInfo/subrange-missing-upperBound.ll' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llc /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/llvm/test/DebugInfo/subrange-missing-upperBound.ll -filetype=obj -o - | /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llvm-dwarfdump - | /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/FileCheck /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/llvm/test/DebugInfo/subrange-missing-upperBound.ll
+ /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llc /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/llvm/test/DebugInfo/subrange-missing-upperBound.ll -filetype=obj -o -
+ /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llvm-dwarfdump -
+ /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/FileCheck /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/llvm/test/DebugInfo/subrange-missing-upperBound.ll
Program aborted due to an unhandled Error:
createMCCodeEmitter failed
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llc /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/llvm/test/DebugInfo/subrange-missing-upperBound.ll -filetype=obj -o -
 #0 0x0000783565f94c70 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/lib/libLLVMSupport.so.19.0git+0x1dac70)
 #1 0x0000783565f9208f llvm::sys::RunSignalHandlers() (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/lib/libLLVMSupport.so.19.0git+0x1d808f)
 #2 0x0000783565f921e5 SignalHandler(int) Signals.cpp:0:0
 #3 0x0000783565642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007835656969fc __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 #5 0x00007835656969fc __pthread_kill_internal ./nptl/pthread_kill.c:78:10
 #6 0x00007835656969fc pthread_kill ./nptl/pthread_kill.c:89:10
 #7 0x0000783565642476 gsignal ./signal/../sysdeps/posix/raise.c:27:6
 #8 0x00007835656287f3 abort ./stdlib/abort.c:81:7
 #9 0x0000783565eaec8b llvm::Error::fatalUncheckedError() const (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/lib/libLLVMSupport.so.19.0git+0xf4c8b)
#10 0x0000783567dea758 llvm::LLVMTargetMachine::addAsmPrinter(llvm::legacy::PassManagerBase&, llvm::raw_pwrite_stream&, llvm::raw_pwrite_stream*, llvm::CodeGenFileType, llvm::MCContext&) (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/lib/libLLVMCodeGen.so.19.0git+0x318758)
#11 0x0000783567dea8a5 llvm::LLVMTargetMachine::addPassesToEmitFile(llvm::legacy::PassManagerBase&, llvm::raw_pwrite_stream&, llvm::raw_pwrite_stream*, llvm::CodeGenFileType, bool, llvm::MachineModuleInfoWrapperPass*) (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/lib/libLLVMCodeGen.so.19.0git+0x3188a5)
#12 0x00005668ee036820 compileModule(char**, llvm::LLVMContext&) llc.cpp:0:0
#13 0x00005668ee02c6fe main (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llc+0xf6fe)
#14 0x0000783565629d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#15 0x0000783565629e40 call_init ./csu/../csu/libc-start.c:128:20
#16 0x0000783565629e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#17 0x00005668ee02d255 _start (/home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/llc+0x10255)
error: -: The file was not recognized as a valid object file
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/build/bin/FileCheck /home/buildbot/worker/as-builder-7/ramdisk/llvm-nvptx64-nvidia-ubuntu/llvm-project/llvm/test/DebugInfo/subrange-missing-upperBound.ll

--

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


```

https://github.com/llvm/llvm-project/pull/96474