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mipsmccodeemmitter
2011 Oct 10
2
[LLVMdev] Adding fixups and relocations late in code generation
...e code.
I how exactly does one set an expression to be PC relative and if the
compiler can resolve it, not produce a relocation?
In our case, the backend produces an expression for the branch which is
the target label. I make a call from the .td for the branch instruction
which calls a routine in MipsMCCodeEmmitter.cpp. That routine
##############################################################
unsigned MipsMCCodeEmitter::
getBranchTargetOpValue(const MCInst &MI, unsigned OpNo,
SmallVectorImpl<MCFixup> &Fixups) const {
const MCOperand &MO = MI.getOperand(OpNo);
if (MO.isReg...
2011 Oct 10
0
[LLVMdev] Adding fixups and relocations late in code generation
...s the target hook RecordRelocation() if it cannot evaluate it directly and needs a relocation in the object file.
> In our case, the backend produces an expression for the branch which is
> the target label. I make a call from the .td for the branch instruction
> which calls a routine in MipsMCCodeEmmitter.cpp. That routine
>
> ##############################################################
> unsigned MipsMCCodeEmitter::
> getBranchTargetOpValue(const MCInst &MI, unsigned OpNo,
> SmallVectorImpl<MCFixup> &Fixups) const {
>
> const MCOperand &MO = MI....