[LLVMdev] mov instruction in LLVM IR

[Zoltan Varga]

Hi,

  A way to handle moves is to have an array mapping virtual regs to the llvm
instructions
which compute them. Then a
dr <- sr
move can be handled by doing
reg_to_inst [dr] = reg_to_inst [sr].

And whenever sr is used as an input to an operation, use reg_to_inst [sr]
instead.

                       Zoltan

On Fri, May 29, 2009 at 1:23 AM, Vinod Grover <vgrover528 at gmail.com> wrote:

> The input language is at assembly level, and the location akin to a %temp (
> a virtual register if you will) and contains moves from one virtual to
> another. Though these are not like memory but I could represent them as
> local variables and do loads and stores; so I dont know how to represent it
> in C except as local variables.
>
> On Thu, May 28, 2009 at 4:06 PM, Mike Stump <mrs at apple.com> wrote:
>
>> On May 28, 2009, at 3:46 PM, Vinod Grover wrote:
>> > We are working on a new front-end for LLVM IR for a low level
>> > language; The input has mov from one scalar to another and we would
>> > like to represent these in LLVM IR. being new to LLVM I am not sure
>> > if there is a way to represent this since I couldnt find a mov instr.
>>
>> Do you know how to do the action you seek in C?  If yes, just compile
>> with clang or llvm-gcc at -O4 and then read the output directly for
>> the operations to use.
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