[LLVMdev] mips16 hard float puzzle

reed kotler rkotler at mips.com
Tue Jan 8 19:00:54 PST 2013

On 01/08/2013 06:40 PM, Eli Friedman wrote:
> On Tue, Jan 8, 2013 at 6:33 PM, reed kotler <rkotler at mips.com> wrote:
>> On 01/08/2013 01:48 PM, Eli Friedman wrote:
>>> On Mon, Jan 7, 2013 at 6:07 PM, reed kotler <rkotler at mips.com> wrote:
>>>> For example:
>>>> /home/rkotler/llvm/install/bin/llc -mcpu=mips16 hf16_2.ll -march=mipsel
>>>> -relocation-model=pic -o hf16_2.s -O3 -mips16-hard-float -soft-float
>>> Try something like the following:
>>> float f;
>>> double test(void* fptr) {
>>>     f = ((float(*)(float,float))fptr)(1.0, 1.0);
>>> }
>>> -Eli
>> It seems that in SelectionDAGBuilder::visitCall, that I.getCalledFunction()
>> has the correct protoype,
>> even for this case you give. (This case you give is not constructable as you
>> pointed out simply using the DAG in Mips lower call).
>> So it seems possible to add an additional parameter to LowerCallTo and pass
>> it down the chain
>> until Mips lower call is invoked.
>> Is this more or less what you had in mind?
> That's the right idea... but as far as I can tell, it's already part
> of the CallLoweringInfo structure.
> -Eli
Awesome. thanks for the help.

It's already in CallLoweringInfo

(gdb) call (*CLI.RetTy).dump()
(gdb) call (*CLI.Args[0].Ty).dump()
(gdb) call (*CLI.Args[1].Ty).dump()


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