<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/72507>72507</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [ARM][backend] 
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          CoTinker
      </td>
    </tr>
</table>

<pre>
    demo
```
/* PR 5878. 

   We ICEd in verify_local_live_at_start because we incorrectly forced
   the PIC register live between BAR and BAZ.  We did this because the
   definition of PIC_OFFSET_TABLE_REGNUM was incorrectly not INVALID_REGNUM
   when !flag_pic for most targets.  */

/* { dg-do run } */
/* { dg-options "-O -fno-pic" } */
/* { dg-require-effective-target nonlocal_goto } */

extern void abort (void);

#if defined(__alpha__)
/* PIC register is $29, but is used even without -fpic.  */
#elif defined(__arc__)
# define PIC_REG  "26"
#elif defined(__arm__)
# define PIC_REG  "9"
#elif defined(AVR)
/* No pic register. */
#elif defined(__cris__)
# define PIC_REG  "0"
#elif defined(__epiphany__)
#define PIC_REG "r28"
#elif defined(__fr30__)
/* No pic register.  */
#elif defined(__H8300__) || defined(__H8300H__) || defined(__H8300S__)
/* No pic register. */
#elif defined(_IBMR2)
/* No pic register.  */
#elif defined(__i386__)
# define PIC_REG  "ebx"
#elif defined(__ia64__)
/* PIC register is r1, but is used even without -fpic. */
#elif defined(__lm32__)
/* No pic register.  */
#elif defined(__M32R__)
/* No pic register.  */
#elif defined(__m68k__)
# define PIC_REG  "a5"
#elif defined(__mc68hc1x__)
/* No pic register. */
#elif defined(__mcore__)
/* No pic register.  */
#elif defined(__MICROBLAZE__)
# define PIC_REG "r20"
#elif defined(__mips__)
/* PIC register is $28, but is used even without -fpic. */
#elif defined(__MMIX__)
/* No pic register.  */
#elif defined(__mn10300__)
/* No pic register.  */
#elif defined(__moxie__)
/* No pic register.  */
#elif defined(__nds32__)
/* No pic register.  */
#elif defined(__nios2__)
/* No pic register.  */
#elif defined(__hppa__)
/* PIC register is %r27 or %r19, but is used even without -fpic.  */
#elif defined(__pdp11__)
/* No pic register. */
#elif defined(__powerpc__) || defined(__PPC__) || defined(__POWERPC__) || defined (__ppc)
# ifdef __MACH__
#  define PIC_REG  "31"
# else
#  define PIC_REG  "30"
# endif
#elif defined(__riscv)
/* No pic register.  */
#elif defined(__RX__)
/* No pic register. */
#elif defined(__s390__)
# define PIC_REG  "12"
#elif defined(__sparc__)
# define PIC_REG  "l7"
#elif defined(__tile__)
# define PIC_REG "r51"
#elif defined(__TMS320C6X__)
# define PIC_REG "B14"
#elif defined(__v850)
/* No pic register.  */
#elif defined(__vax__)
/* No pic register.  */
#elif defined(__VISIUM__)
/* No pic register. */
#elif defined(__xstormy16__)
/* No pic register.  */
#elif defined(__XTENSA__)
/* No pic register.  */
#elif defined(__sh__)
# define PIC_REG  "r12"
#elif defined(__x86_64__)
/* No pic register. */
#elif defined(__m32c__)
/* No pic register.  */
#elif defined(__SPU__)
#  define PIC_REG  "126"
#elif defined (__frv__)
# ifdef __FRV_FDPIC__
#  define PIC_REG "gr15"
# else
#  define PIC_REG "gr17"
#endif
#elif defined (__aarch64__)
/* No pic register -- yet.  */
#elif defined(__RL78__)
/* No pic register.  */
#elif defined(__MSP430__)
/* No pic register.  */
#elif defined (__nvptx__)
/* No pic register.  */
#else
# error "Modify the test for your target."
#endif

#if defined PIC_REG && !defined __PIC__ && !defined __pic__
register void *reg __asm__(PIC_REG);
#else
/* We really need a global register variable set to the PIC register
   to expose the bug.  Oh well, let the test case not fail.  */
static void *reg;
#endif

void * __attribute__((noinline))
dummy (void *x)
{
  return x;
}

void
f (void)
{
  goto *dummy (&&bar);
  for (;;)
    {
    foo:
      reg = (void *) 1;
 if (!reg)
        goto baz;
      reg = &&foo;
    }

 bar:
 baz:
  reg = 0;
}

int
main()
{
  void *old_reg = reg;
  reg = (void *) 1;

  f ();

  /* Additionally test that the prologue/epilogue properly does *not*
     save and restore global registers.  Not possible when the PIC
     register is in a register window, of course.  On Darwin, you can't
     call library routines from non-PIC code.  */
#if !defined (__sparc__) && !defined(__MACH__)
  if (reg)
    abort ();
#endif

  reg = old_reg;
  return 0;
}
```

ARM32 clang report errror:
```
fatal error: error in backend: Invalid register name "9".
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang -gdwarf-4 -g -o /app/output.s -S -target arm-linux-gnueabi --gcc-toolchain=/opt/compiler-explorer/arm/gcc-12.2.0/arm-unknown-linux-gnueabi --sysroot=/opt/compiler-explorer/arm/gcc-12.2.0/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sysroot -fcolor-diagnostics -fno-crash-diagnostics -O -fno-pic <source>
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module '<source>'.
4.      Running pass 'ARM Instruction Selection' on function '@f'
 #0 0x00000000034ea988 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x34ea988)
 #1 0x00000000034e8ad4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+0x34e8ad4)
 #2 0x00000000034371a3 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x34371a3)
 #3 0x00000000034e04de llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x34e04de)
 #4 0x0000000000c03926 (/opt/compiler-explorer/clang-trunk/bin/clang+0xc03926)
 #5 0x00000000034401d3 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x34401d3)
 #6 0x00000000014ccef8 (/opt/compiler-explorer/clang-trunk/bin/clang+0x14ccef8)
 #7 0x00000000045a25cd llvm::SelectionDAGISel::Select_WRITE_REGISTER(llvm::SDNode*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x45a25cd)
 #8 0x00000000045a6a94 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x45a6a94)
 #9 0x00000000014c0e85 (anonymous namespace)::ARMDAGToDAGISel::Select(llvm::SDNode*) ARMISelDAGToDAG.cpp:0:0
#10 0x00000000045a0fd7 llvm::SelectionDAGISel::DoInstructionSelection() (/opt/compiler-explorer/clang-trunk/bin/clang+0x45a0fd7)
#11 0x00000000045adb55 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/compiler-explorer/clang-trunk/bin/clang+0x45adb55)
#12 0x00000000045b05a9 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x45b05a9)
#13 0x00000000045b2d89 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (.part.0) SelectionDAGISel.cpp:0:0
#14 0x00000000014ca104 (anonymous namespace)::ARMDAGToDAGISel::runOnMachineFunction(llvm::MachineFunction&) ARMISelDAGToDAG.cpp:0:0
#15 0x00000000029714c0 llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (.part.0) MachineFunctionPass.cpp:0:0
#16 0x0000000002e8dd72 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x2e8dd72)
#17 0x0000000002e8def1 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x2e8def1)
#18 0x0000000002e8fb70 llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x2e8fb70)
#19 0x00000000037581e9 clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x37581e9)
#20 0x0000000003d254d8 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d254d8)
#21 0x0000000005b13619 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x5b13619)
#22 0x0000000003d246e5 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d246e5)
#23 0x0000000003fa3891 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fa3891)
#24 0x0000000003f2177b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f2177b)
#25 0x0000000004082cc3 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4082cc3)
#26 0x0000000000c05696 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+0xc05696)
#27 0x0000000000bfe0ed ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#28 0x0000000003d6bcf9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#29 0x00000000034370a3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x34370a3)
#30 0x0000000003d6bf19 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#31 0x0000000003d33f17 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d33f17)
#32 0x0000000003d348cd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d348cd)
#33 0x0000000003d3e63c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3d3e63c)
#34 0x0000000000c02a91 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0xc02a91)
#35 0x0000000000afdbc1 main (/opt/compiler-explorer/clang-trunk/bin/clang+0xafdbc1)
#36 0x00007f5b66646083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083)
#37 0x0000000000bfd8ee _start (/opt/compiler-explorer/clang-trunk/bin/clang+0xbfd8ee)
clang: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Compiler returned: 70
```
https://godbolt.org/z/TTT6W1aGv
</pre>
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