[LLVMdev] long double type on ARM
bob.wilson at apple.com
Wed Sep 30 09:23:13 PDT 2009
Unlike llvm itself, llvm-gcc needs to be configured for a particular
target architecture. It looks like you're using a copy of llvm-gcc
that was built to generate x86 code.
On Sep 30, 2009, at 6:27 AM, Jin Gu Kang wrote:
> Dear LLVM members.
> I am compiling coreutils-7.4 package for ARM linux using LLVM 2.5
> When i compiled 'od' program in coreutils package using LLVM 2.5,
> i could see the error message on llc processing.
> > llvm-gcc -emit-llvm ./od.c -c -o ./od.bc -other-options...
> > llc -march=arm ./od.bc -f -o ./od.s
> llc: /home/jaykang10/HardDisk2/Projects/LLVM/src/llvm-2.5/lib/Target/
> TargetData.cpp:305: unsigned int llvm::TargetData::getAlignmentInfo
> (llvm::AlignTypeEnum, uint32_t, bool, const llvm::Type*) const:
> Assertion `AlignType == VECTOR_ALIGN && "Unknown alignment type!"'
> The problem was that
> when i converted 'od' source code to llvm bitcode, long double type
> of 'od' source code was changed to x86_fp80 type in llvm bitcode and
> then llc on ARM target was not support x86_fp80 type.
> I think that long double type on ARM is 8 byte. (same as double type)
> When we use llvm on ARM target,(or other target not support x86_fp80)
> i think it might be better to convert long double type in C to
> double type in llvm bitcode on llvm-gcc or
> treat x86_fp80 type in llvm bitcode as double type on llc.
> (I wonder if we select the target at llvm-gcc build time)
> I would like to know how to solve the above problem.
> Thank you
> Best regards,
> Jin-Gu Kang
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the llvm-dev