[LLVMdev] changing opcode

Reed Kotler rkotler at mips.com
Wed Feb 13 16:20:24 PST 2013


Nice idea using the table.

On 02/13/2013 04:12 PM, Cameron McInally wrote:
> On Wed, Feb 13, 2013 at 7:00 PM, reed kotler <rkotler at mips.com
> <mailto:rkotler at mips.com>> wrote:
>
>     Is there a simple way to just change the opcode of a machine
>     instruction.
>
>     I have a lot of long/short pairs where when I know the offset, i can
>     replace the long version with the short version.
>
>
> Hey Reed,
>
>
> The x86 target does something like this. Check out ReplaceableInstrs
> inlib/Target/X86/X86InstrInfo.cpp.
>
>
> Hope that helps,
>
> Cameron
>
>
>
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