Bug 51784 - LLVM compile on ARMv71
Summary: LLVM compile on ARMv71
Status: NEW
Alias: None
Product: Runtime
Classification: Mono
Component: General ()
Version: 4.8.0 (C9)
Hardware: All Linux
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-01-26 13:59 UTC by jm
Modified: 2017-08-28 15:54 UTC (History)
5 users (show)

Is this bug a regression?: ---
Last known good build:

Notice (2018-05-24): bugzilla.xamarin.com is now in read-only mode.

Please join us on Visual Studio Developer Community and in the Xamarin and Mono organizations on GitHub to continue tracking issues. Bugzilla will remain available for reference in read-only mode. We will continue to work on open Bugzilla bugs, copy them to the new locations as needed for follow-up, and add the new items under Related Links.

Our sincere thanks to everyone who has contributed on this bug tracker over the years. Thanks also for your understanding as we make these adjustments and improvements for the future.

Please create a new report for Bug 51784 on GitHub or Developer Community if you have new information to add and do not yet see a matching new report.

If the latest results still closely match this report, you can use the original description:

  • Export the original title and description: GitHub Markdown or Developer Community HTML
  • Copy the title and description into the new report. Adjust them to be up-to-date if needed.
  • Add your new information.

In special cases on GitHub you might also want the comments: GitHub Markdown with public comments

Related Links:

Description jm 2017-01-26 13:59:13 UTC
I compiled with:
LLVM: ./configure --prefix="/mono" --enable-optimized --enable-targets=arm;
Mono 4.8: ./autogen.sh --prefix="/mono" --enable-optimized --enable-targets=arm --enable-llvm=yes --with-sgen=yes --with-gc=sgen --enable-minimal=debug,logging,profiler,softdebug;

uname -a gives:
Linux pa-com2 4.4.38-std-1 #1 SMP Mon Dec 12 10:42:40 UTC 2016 armv7l armv7l armv7l GNU/Linux

I then used:
for i in /mono/lib/mono/gac/*/*/*.dll; do /mono/bin/mono -O=all --aot --llvm $i; done;

It resulted in the following (for all *.dlls):
Mono Ahead of Time compiler - compiling assembly /mono/lib/mono/gac/I18N.Other/
AOTID E6ED613D-A7BB-D52D-B1E5-DC5313ED726E
Executing opt: "opt" -f -targetlibinfo -no-aa -basicaa -notti -instcombine -simplifycfg -inline-cost -inline -sroa -domtree -early-cse -lazy-value-info -correlated-propagation -simpl                   ifycfg -instcombine -simplifycfg -reassociate -domtree -loops -loop-simplify -lcssa -loop-rotate -licm -lcssa -loop-unswitch -instcombine -scalar-evolution -loop-simplify -lcssa -ind                   vars -loop-idiom -loop-deletion -loop-unroll -memdep -gvn -memdep -memcpyopt -sccp -instcombine -lazy-value-info -correlated-propagation -domtree -memdep -adce -simplifycfg -instcomb                   ine -strip-dead-prototypes -domtree -verify -o "temp.opt.bc" "temp.bc"
Executing llc: "llc"  -mattr=+vfp2,-neon,+d16 -float-abi=hard -asm-verbose=false -disable-gnu-eh-frame -enable-mono-eh-frame -mono-eh-frame-symbol=mono_aot_I18N_Other_eh_frame -reloc                   ation-model=pic -filetype=obj -o "temp-llvm.o" "temp.opt.bc"
Unsupported calling convention
UNREACHABLE executed at ARMISelLowering.cpp:1273!
Stack dump:
0.      Program arguments: llc -mattr=+vfp2,-neon,+d16 -float-abi=hard -asm-verbose=false -disable-gnu-eh-frame -enable-mono-eh-frame -mono-eh-frame-symbol=mono_aot_I18N_Other_eh_fra                   me -relocation-model=pic -filetype=obj -o temp-llvm.o temp.opt.bc
1.      Running pass 'Function Pass Manager' on module 'temp.opt.bc'.
2.      Running pass 'ARM Instruction Selection' on function '@I18N_Other_CP1251__ctor'
AOT of image /mono/lib/mono/gac/I18N.Other/ failed.

As long as i pass the --llvm command the error remains. On x86_64 Systems will it run without problems with the same command.
Comment 1 jm 2017-01-29 23:54:26 UTC
Please tell me if you need more information. If i am able to contribute i will do my best. I am very interested in using llvm on the arm device.