[llvm-commits] [llvm] r37893 - /llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td

[Evan Cheng]

Yes if PPC::CR0 stands for 0.

Evan

On Jul 5, 2007, at 9:10 AM, Chris Lattner wrote:

>> URL: http://llvm.org/viewvc/llvm-project?rev=37893&view=rev
>> Log:
>> PPC conditional branch predicate does not change after isel.
>>
>> Modified:
>>     llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td
>>
>> Modified: llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/
>> PowerPC/PPCInstrInfo.td?rev=37893&r1=37892&r2=37893&view=diff
>>
>> ===================================================================== 
>> =
>> ========
>> --- llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td (original)
>> +++ llvm/trunk/lib/Target/PowerPC/PPCInstrInfo.td Thu Jul  5
>> 02:09:50 2007
>> @@ -272,7 +272,8 @@
>>
>>  // PowerPC Predicate operand.  20 = (0<<5)|20 = always, CR0 is a
>> dummy reg
>>  // that doesn't matter.
>> -def pred : PredicateOperand<OtherVT, (ops imm, CRRC), (ops (i32
>> 20), CR0)> {
>> +def pred : ImmutablePredicateOperand<OtherVT, (ops imm, CRRC),
>> +                                              (ops (i32 20), CR0)> {
>
> Would it make sense and be safe to change CR0 -> zeroreg?
>
> -Chris
>
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