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llvmlite, how resolve ConstantExpr?

See original GitHub issue

I have instruction like below. and i get it by ‘llvmlite.binding.parse_assembly’ and that instruction represented by llvmlite.binding.ValueRef

store i8* getelementptr inbounds (i8, i8* bitcast (i32 ()* @main to i8*), i64 107), i8** %1, align 8

# this print
# store i8* getelementptr inbounds (i8, i8* bitcast (i32 ()* @main to i8*), i64 107), i8** %1, align 8
print(instruction)

# Error Log ' raise ValueError('expected block value, got %s' % (self._kind,)) ' 
for operand in instruction.operands:
    operand.operands

There are any way to get ConstantExpr operands? or get from ll file?

Issue Analytics

State:
Created 3 years ago
Comments:5 (3 by maintainers)

Top GitHub Comments

1reaction

gmarkallcommented, Nov 20, 2020

As a pointer for where to start looking, if you want to try to augment llvmlite to provide the information you’re looking for: the functionality for getting the functions, instructions, operands, etc. is implemented in ffi/value.cpp and llvmlite/binding/value.py (in the ValueRef class) - you could add additional functions that provide access to other LLVM functions (such as GetElementPtrInst.getPointerOperand for example, if that’s what you’re looking for) to these files by taking inspiration from the functions that already exist there.

llvmpy is very old and unsupported as far as I know - I would suggest that using it wouldn’t be easy or sustainable.

0reactions

dbwodlf3commented, Nov 20, 2020

Thanks kind programmers

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