r274110 - [AVX512] Zero extend cmp intrinsic return value.

[Craig Topper via cfe-commits]

This change codgens to something really awful now. Can you take a look?

.section __TEXT,__text,regular,pure_instructions
.section __TEXT,__literal8,8byte_literals
.p2align 3
LCPI0_0:
.quad -1
.section __TEXT,__const
.p2align 6
LCPI0_1:
.quad 0
.quad 1
.quad 2
.quad 3
.quad 8
.quad 8
.quad 8
.quad 8
.section __TEXT,__text,regular,pure_instructions
.globl _test_mm_cmpeq_epu32_mask
.p2align 4, 0x90
_test_mm_cmpeq_epu32_mask:
vpcmpeqd %xmm1, %xmm0, %k1
vpbroadcastq LCPI0_0(%rip), %zmm0 {%k1} {z}
vpxord %zmm1, %zmm1, %zmm1
vmovdqa64 LCPI0_1(%rip), %zmm2
vpermt2q %zmm1, %zmm2, %zmm0
vpsllq $63, %zmm0, %zmm0
vptestmq %zmm0, %zmm0, %k0
kmovw %k0, %eax
retq

~Craig

On Wed, Jun 29, 2016 at 1:14 AM, Igor Breger via cfe-commits <
cfe-commits at lists.llvm.org> wrote:

> Author: ibreger
> Date: Wed Jun 29 03:14:17 2016
> New Revision: 274110
>
> URL: http://llvm.org/viewvc/llvm-project?rev=274110&view=rev
> Log:
> [AVX512]  Zero extend cmp intrinsic return value.
>
> Differential Revision: http://reviews.llvm.org/D21746
>
> Modified:
>     cfe/trunk/lib/CodeGen/CGBuiltin.cpp
>     cfe/trunk/test/CodeGen/avx512vl-builtins.c
>
> Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=274110&r1=274109&r2=274110&view=diff
>
> ==============================================================================
> --- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
> +++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Wed Jun 29 03:14:17 2016
> @@ -6460,8 +6460,8 @@ static Value *EmitX86MaskedCompare(CodeG
>        Indices[i] = i;
>      for (unsigned i = NumElts; i != 8; ++i)
>        Indices[i] = NumElts;
> -    Cmp = CGF.Builder.CreateShuffleVector(Cmp,
> UndefValue::get(Cmp->getType()),
> -                                          Indices);
> +    Cmp = CGF.Builder.CreateShuffleVector(
> +        Cmp, llvm::Constant::getNullValue(Cmp->getType()), Indices);
>    }
>    return CGF.Builder.CreateBitCast(Cmp,
>                                     IntegerType::get(CGF.getLLVMContext(),
>
> Modified: cfe/trunk/test/CodeGen/avx512vl-builtins.c
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/avx512vl-builtins.c?rev=274110&r1=274109&r2=274110&view=diff
>
> ==============================================================================
> --- cfe/trunk/test/CodeGen/avx512vl-builtins.c (original)
> +++ cfe/trunk/test/CodeGen/avx512vl-builtins.c Wed Jun 29 03:14:17 2016
> @@ -8,6 +8,7 @@
>  __mmask8 test_mm_cmpeq_epu32_mask(__m128i __a, __m128i __b) {
>    // CHECK-LABEL: @test_mm_cmpeq_epu32_mask
>    // CHECK: icmp eq <4 x i32> %{{.*}}, %{{.*}}
> +  // CHECK: shufflevector <4 x i1> %{{.*}}, <4 x i1> zeroinitializer, <8
> x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 4, i32 4, i32 4>
>    return (__mmask8)_mm_cmpeq_epu32_mask(__a, __b);
>  }
>
>
>
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