http://llvm.org/bugs/show_bug.cgi?id=5109
Summary: long double type on ARM
Product: tools
Version: 2.5
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: llc
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=3591)
--> (http://llvm.org/bugs/attachment.cgi?id=3591)
bugpoint-reduced-simplified.bc
Dear LLVM members.
I am compiling coreutils-7.4 package for ARM linux using LLVM 2.5 version.
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!"' failed.
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
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