[PATCH] TableGen: Put NoRegAltName up front in RegAltNameIndices

[David Siegel]

Ping.

> On 15.07.2015, at 20:19, David Siegel <david.siegel at artcom.de> wrote:
> 
> Ping.
> 
> Adding @stoklund.
> 
>> On 24.06.2015, at 19:38, David Siegel <david.siegel at artcom.de> wrote:
>> 
>> Ping.
>> 
>>> On 16.06.2015, at 12:17, David Siegel <david.siegel at artcom.de> wrote:
>>> 
>>> Hi,
>>> 
>>> AsmWriterEmitter::EmitGetRegisterName(...) assumes that the special item NoRegAltName is the first item in RegAltNameIndices (see AsmWriterEmitter.cpp:613). If it happens to be second element the namespace is empty and the generated code does not compile. I fixed this by moving the NoRegAltName item up front in CodeGenTarget::ReadRegAltNameIndices().
>> 
>> To reproduce add this line to any RegisterInfo.td, adjust the namespace and recompile:
>> 
>> let Namespace = “X86" in { def ABC : RegAltNameIndex; }
>> 
>> This line succeeds:
>> 
>> let Namespace = “X86" in { def XYZ : RegAltNameIndex; }
>> 
>> I verified that the patch is still good. This is my first contribution. Let me know if something is missing.
>> 
>> Cheers,
>> 
>> d
>> 
> 
> <0001-TableGen-Fix-order-in-RegAltNameIndices.patch>