#1119837 llc crashes while compiling GHC on armhf

Package:
llvm-19
Source:
llvm-19
Description:
Modular compiler and toolchain technologies
Submitter:
Ilias Tsitsimpis
Date:
2025-11-22 12:11:02 UTC
Severity:
normal
Tags:
#1119837#5
Date:
2025-11-01 10:05:48 UTC
From:
To:
Package: llvm-19
User: debian-arm@lists.debian.org
Usertags: armhf
X-Debbugs-Cc: debian-arm@lists.debian.org
Version: 1:19.1.7-7
Severity: important
Tags: upstream
Affects: src:opensnitch
Forwarded: https://github.com/llvm/llvm-project/issues/165422

llc crashes while compiling GHC on armhf with the following traceback:

```
Command line: _build/stage0/bin/ghc -Wall -Wcompat -fdiagnostics-color=never -hisuf p_hi -osuf p_o -hcsuf p_hc -static -prof -hide-all-packages -no-user-package-db '-package-env -' '-package-db _build/stage1/inplace/package.conf.d' '-this-unit-id ghc-bignum-1.3-34fd' '-this-package-name ghc-bignum' '-package-id ghc-prim-0.12.0-57da' -i -i/build/reproducible-path/ghc-9.10.3/_build/stage1/libraries/ghc-bignum/build -i/build/reproducible-path/ghc-9.10.3/_build/stage1/libraries/ghc-bignum/build/autogen -i/build/reproducible-path/ghc-9.10.3/libraries/ghc-bignum/src/ -Irts/include -I_build/stage1/libraries/ghc-bignum/build -I_build/stage1/libraries/ghc-bignum/build/include/ -Ilibraries/ghc-bignum/include/ -I/build/reproducible-path/ghc-9.10.3/rts/include -I/build/reproducible-path/ghc-9.10.3/_build/stage1/rts/build/include -optP-include -optP_build/stage1/libraries/ghc-bignum/build/autogen/cabal_macros.h -optc-marm -optP-DBIGNUM_GMP -outputdir _build/stage1/libraries/ghc-bignum/build -Wall -this-unit-id ghc-bignum -fno-catch-nonexhaustive-cases -XHaskell2010 -no-global-package-db -package-db=/build/reproducible-path/ghc-9.10.3/_build/stage1/inplace/package.conf.d -ghcversion-file=rts/include/ghcversion.h -ghcversion-file=rts/include/ghcversion.h -Wnoncanonical-monad-instances -optc-Wno-error=inline -c libraries/ghc-bignum/src/GHC/Num/Backend/Selected.hs -o _build/stage1/libraries/ghc-bignum/build/GHC/Num/Backend/Selected.p_o -fsplit-sections -O -H64m -O2 -haddock -D__ARM_PCS_VFP -Wno-deprecated-flags
===> Command failed with error code: 1
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: llc-19 -O2 -relocation-model=pic -mcpu=arm1176jzf-s -mattr=+strict-align /tmp/ghc57961_0/ghc_7.bc -o /tmp/ghc57961_0/ghc_8.lm_s
  #0 0xf14585f4 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:723:13
  #1 0xf1455ff4 llvm::sys::RunSignalHandlers() build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Signals.cpp:0:5
  #2 0xf1458ee8 SignalHandler build-llvm/tools/clang/stage2-bins/llvm/lib/Support/Unix/Signals.inc:0:3
  #3 0xf078ecd0 __default_sa_restorer ./signal/../sysdeps/unix/sysv/linux/arm/sigrestorer.S:67:0
  #4 0xf3a872ac getObjectFormat build-llvm/tools/clang/stage2-bins/llvm/include/llvm/TargetParser/Triple.h:405:53
  #5 0xf3a872ac isOSBinFormatMachO build-llvm/tools/clang/stage2-bins/llvm/include/llvm/TargetParser/Triple.h:740:12
  #6 0xf3a872ac isTargetMachO build-llvm/tools/clang/stage2-bins/llvm/lib/Target/ARM/ARMSubtarget.h:312:52
  #7 0xf3a872ac GetARMGVSymbol build-llvm/tools/clang/stage2-bins/llvm/lib/Target/ARM/ARMAsmPrinter.cpp:861:18
  #8 0xf3a872ac emitXXStructor build-llvm/tools/clang/stage2-bins/llvm/lib/Target/ARM/ARMAsmPrinter.cpp:93:45
  #9 0xf1d58140 llvm::AsmPrinter::emitXXStructorList(llvm::DataLayout const&, llvm::Constant const*, bool) build-llvm/tools/clang/stage2-bins/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:2970:20
#10 0xf1d4d8ac llvm::AsmPrinter::emitSpecialLLVMGlobal(llvm::GlobalVariable const*) build-llvm/tools/clang/stage2-bins/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:0:0
#11 0xf1d4cd70 llvm::AsmPrinter::emitGlobalVariable(llvm::GlobalVariable const*) build-llvm/tools/clang/stage2-bins/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:710:9
#12 0xf1d5515c llvm::AsmPrinter::doFinalization(llvm::Module&) build-llvm/tools/clang/stage2-bins/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:2297:22
#13 0xf15bf8d0 llvm::FPPassManager::doFinalization(llvm::Module&) build-llvm/tools/clang/stage2-bins/llvm/lib/IR/LegacyPassManager.cpp:1503:55
#14 0xf15ba464 runOnModule build-llvm/tools/clang/stage2-bins/llvm/lib/IR/LegacyPassManager.cpp:1590:55
#15 0xf15ba464 llvm::legacy::PassManagerImpl::run(llvm::Module&) build-llvm/tools/clang/stage2-bins/llvm/lib/IR/LegacyPassManager.cpp:541:44
#16 0x00ab3b30 compileModule build-llvm/tools/clang/stage2-bins/llvm/tools/llc/llc.cpp:742:17
#17 0x00ab18c4 main build-llvm/tools/clang/stage2-bins/llvm/tools/llc/llc.cpp:0:22
#18 0xf077f4ba __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#19 0xf077f556 call_init ./csu/libc-start.c:128:20
#20 0xf077f556 __libc_start_main ./csu/libc-start.c:347:5
`llc-19' failed in phase `LLVM Compiler'. (Exit code: -11)
```

I have tried with various LLVM versions from 17 to 21.

The full build log is at
https://buildd.debian.org/status/fetch.php?pkg=ghc&arch=armhf&ver=9.10.3-1%7Eexp2&stamp=1759175701&raw=0.
#1119837#12
Date:
2025-11-16 13:35:52 UTC
From:
To:
This has been fixed upstream. Please consider backporting the fix, which
will help us unblock updating GHC to a newer version.

Thanks,
#1119837#17
Date:
2025-11-22 12:08:52 UTC
From:
To:
This patch has been backported to llvm-toolchain-21 [1], and I have just
uploaded GHC that uses LLVM 21 in experimental [2]. So it's not critical
to backport this to llvm-toolchain-19 any more.

I will leave this bug open in llvm-toolchain-19, in case anyone bumps
into this.

[1] https://salsa.debian.org/pkg-llvm-team/llvm-toolchain/-/commit/e6de8ff9d4a531b501184d1a672e3eaf2d1bf0ca
[2] https://salsa.debian.org/haskell-team/DHG_packages/-/commit/8ce99a0aa033391583c7c7f3cda910f584fc7a2f

Thanks,