[LLVMdev] MSCV linker and OperandInfo constants

[James_Clayton at scee.net]

Hello all,

I've managed to trace an awkward bug down to the MSVC linker incorrectly 
merging llvm::OperandInfo constants between various backend targets I was 
linking in to my compiler executable. The bug manifested itself by 
replacing the operand data structures for target A with the data 
structures for target B.
I have managed to work around this issue by moving the operand definitions 
from the llvm namespace to a sub-target namespace (i.e. llvm::OperandInfo5 
-> llvm::X86::OperandInfo5)

My work around changes the InstrInfoEmitter::run() function in 
TableGen/InstrInfoEmitter.cpp . A patch (from llvm 3.0 - it doesn't appear 
much has changed) can be found here: http://pastebin.com/pHmu1V63 
The whole modified function can be found here: 
http://pastebin.com/GN4Hh7BC 

This is a simple scoping change, there should be no change in application 
behaviour.

This is the first time I've made any patches to llvm - please let me know 
if you'd like any more information.

Kind regards,

James Clayton
Sony Computer Entertainment Europe Limited


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