[llvm] r289372 - [X86][InstCombine] Teach InstCombineCalls to simplify demanded elements for scalar FMA intrinsics.

[Craig Topper via llvm-commits]

Grr. I wrote the test cases but forgot to add the new files. Should I
revert and add them or just commit them separately?

~Craig

On Sun, Dec 11, 2016 at 12:01 AM, Chandler Carruth <chandlerc at google.com>
wrote:

> No test case?
>
> On Sat, Dec 10, 2016 at 11:52 PM Craig Topper via llvm-commits <
> llvm-commits at lists.llvm.org> wrote:
>
>> Author: ctopper
>> Date: Sun Dec 11 01:42:06 2016
>> New Revision: 289372
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=289372&view=rev
>> Log:
>> [X86][InstCombine] Teach InstCombineCalls to simplify demanded elements
>> for scalar FMA intrinsics.
>>
>> These intrinsics don't read the upper bits of their second and third
>> inputs so we can try to simplify them.
>>
>> Modified:
>>     llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
>>
>> Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/
>> Transforms/InstCombine/InstCombineCalls.cpp?rev=
>> 289372&r1=289371&r2=289372&view=diff
>> ============================================================
>> ==================
>> --- llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp (original)
>> +++ llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp Sun Dec
>> 11 01:42:06 2016
>> @@ -1777,6 +1777,14 @@ Instruction *InstCombiner::visitCallInst
>>      break;
>>    }
>>
>> +  case Intrinsic::x86_fma_vfmadd_ss:
>> +  case Intrinsic::x86_fma_vfmsub_ss:
>> +  case Intrinsic::x86_fma_vfnmadd_ss:
>> +  case Intrinsic::x86_fma_vfnmsub_ss:
>> +  case Intrinsic::x86_fma_vfmadd_sd:
>> +  case Intrinsic::x86_fma_vfmsub_sd:
>> +  case Intrinsic::x86_fma_vfnmadd_sd:
>> +  case Intrinsic::x86_fma_vfnmsub_sd:
>>    case Intrinsic::x86_avx512_mask_add_ss_round:
>>    case Intrinsic::x86_avx512_mask_div_ss_round:
>>    case Intrinsic::x86_avx512_mask_mul_ss_round:
>>
>>
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