Hello,
I am getting the following error while generating code for arm using llc for
one of the specint2000 benchmark. Though same works for x86 target.
Command => llc -march=arm 186.crafty/186.crafty.rel.bc -o
186.crafty/186.crafty.m5arm.s
Error => LLVM ERROR: Couldn't allocate output reg for constraint
'{cx}'!
Have anyone seen this before? Is there a work around for this? I have tried
different register allocator using option "-regalloc=<>" to llc.
It happens
with all the register allocators.
Thanks
Daya
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20110614/412c9385/attachment.html>
Hi Daya,> I am getting the following error while generating code for arm using llc for one > of the specint2000 benchmark. Though same works for x86 target. > > > Command => llc -march=arm 186.crafty/186.crafty.rel.bc -o > 186.crafty/186.crafty.m5arm.s > Error => LLVM ERROR: Couldn't allocate output reg for constraint '{cx}'! > > > Have anyone seen this before? Is there a work around for this? I have tried > different register allocator using option "-regalloc=<>" to llc. It happens with > all the register allocators.where did the bitcode come from? If the bitcode contains x86 inline assembler then it is normal that it won't work on arm. Ciao, Duncan.
Hello> Command => llc -march=arm 186.crafty/186.crafty.rel.bc -o > 186.crafty/186.crafty.m5arm.s > Error => LLVM ERROR: Couldn't allocate output reg for constraint '{cx}'! > > Have anyone seen this before?It seems you're feeding x86-specific LLVM IR to arm backend. Please don't do that. -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University
Thanks for your reply. I have a normal (../configure --enable-profiling --disable-optimized --enable-assertions) llvm debug+profile+assert build. I am generating llvm-bitcode using following commands. llvm-gcc -DLINUX_i386 -DSPEC_CPU2000 -O3 -emit-llvm 186.crafty/src/valid.c -c -o 186.crafty/src/valid.bc --- llvm-link 186.crafty/src/*.bc -o 186.crafty/186.crafty.rel.bc and finally: llc -march=arm 186.crafty/186.crafty.rel.bc -o 186.crafty/186.crafty.m5arm.s And there is not inline assembly in my C code. Should I somehow specify arm related options to llvm while building llvm? Thanks Daya On Tue, Jun 14, 2011 at 1:34 PM, Anton Korobeynikov <anton at korobeynikov.info> wrote:> Hello > > > Command => llc -march=arm 186.crafty/186.crafty.rel.bc -o > > 186.crafty/186.crafty.m5arm.s > > Error => LLVM ERROR: Couldn't allocate output reg for constraint '{cx}'! > > > > Have anyone seen this before? > It seems you're feeding x86-specific LLVM IR to arm backend. Please > don't do that. > > -- > With best regards, Anton Korobeynikov > Faculty of Mathematics and Mechanics, Saint Petersburg State University >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110614/0af29cc4/attachment.html>