[cfe-dev] aborting a compilation with illegal arguments

Jonas Paulsson via cfe-dev cfe-dev at lists.llvm.org
Mon Dec 7 07:21:35 PST 2015


Hi Hal,

thanks for help!

The FeaturesVec is however empty in initFeatureMap(). Passing -fzvector 
is recognized in ParseLangArgs():

   if (Args.hasArg(OPT_fzvector))
     Opts.ZVector = 1;

It however does not seem like this flag is accessible in 
initFeatureMap(). What should I do?

/Jonas


On 2015-12-04 15:24, Hal Finkel wrote:
> Hi Jonas,
>
> We have a similar set of checks for -mpower8-vector and -mvsx, see ppcUserFeaturesCheck in lib/Basic/Targets.cpp.
>
>   -Hal
>
> ----- Original Message -----
>> From: "Jonas Paulsson via cfe-dev" <cfe-dev at lists.llvm.org>
>> To: cfe-dev at lists.llvm.org
>> Sent: Friday, December 4, 2015 8:03:32 AM
>> Subject: [cfe-dev] aborting a compilation with illegal arguments
>>
>> Hi,
>>
>> SystemZ only has vector support on z13, and therefore it does not
>> make
>> sense to pass the -fzvector option without specifying z13 as well.
>> Currently, if compiling with clang, the compilation will abort during
>> isel in cases where -fzvector is used incorrectly, but it seems best
>> to
>> abort early, in the FE, if possible.
>>
>> I would like to ask how one would best handle this. SystemZTargetInfo
>> has a vector feature, which it would make sense to check against. One
>> could also check the CPU string, I guess.
>>
>> /Jonas Paulsson
>>
>> _______________________________________________
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>> cfe-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>



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