[AVX512] Fix VFPCLASSSD/VFPCLASSSS intrinsic lowering. The i1 result …

…should be zero extended according to SPEC.

Differential Revision: http://reviews.llvm.org/D23489

llvm-svn: 278626

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -17951,7 +17951,7 @@ static SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, const X86Subtarget &Subtarget
       SDValue FPclass = DAG.getNode(IntrData->Opc0, dl, MVT::i1, Src1, Imm);
       SDValue FPclassMask = getScalarMaskingNode(FPclass, Mask,
         DAG.getTargetConstant(0, dl, MVT::i1), Subtarget, DAG);
-      return DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i8, FPclassMask);
+      return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i8, FPclassMask);
     }
     case CMP_MASK:
     case CMP_MASK_CC: {

llvm/test/CodeGen/X86/avx512dq-intrinsics.ll

@@ -490,19 +490,9 @@ define i8 @test_int_x86_avx512_mask_fpclass_sd(<2 x double> %x0, i8 %x1) {
 ; CHECK-NEXT:    andl $1, %edi
 ; CHECK-NEXT:    kmovw %edi, %k1
 ; CHECK-NEXT:    vfpclasssd $2, %xmm0, %k0 {%k1}
-; CHECK-NEXT:    kmovw %k0, %eax
-; CHECK-NEXT:    testb %al, %al
-; CHECK-NEXT:    je LBB28_2
-; CHECK-NEXT:  ## BB#1:
-; CHECK-NEXT:    movb $-1, %al
-; CHECK-NEXT:  LBB28_2:
-; CHECK-NEXT:    vfpclasssd $4, %xmm0, %k0
 ; CHECK-NEXT:    kmovw %k0, %ecx
-; CHECK-NEXT:    testb %cl, %cl
-; CHECK-NEXT:    je LBB28_4
-; CHECK-NEXT:  ## BB#3:
-; CHECK-NEXT:    movb $-1, %cl
-; CHECK-NEXT:  LBB28_4:
+; CHECK-NEXT:    vfpclasssd $4, %xmm0, %k0
+; CHECK-NEXT:    kmovw %k0, %eax
 ; CHECK-NEXT:    addb %cl, %al
 ; CHECK-NEXT:    ## kill: %AL<def> %AL<kill> %AX<kill>
 ; CHECK-NEXT:    retq
@@ -520,19 +510,9 @@ define i8 @test_int_x86_avx512_mask_fpclass_ss(<4 x float> %x0, i8 %x1) {
 ; CHECK-NEXT:    andl $1, %edi
 ; CHECK-NEXT:    kmovw %edi, %k1
 ; CHECK-NEXT:    vfpclassss $4, %xmm0, %k0 {%k1}
-; CHECK-NEXT:    kmovw %k0, %eax
-; CHECK-NEXT:    testb %al, %al
-; CHECK-NEXT:    je LBB29_2
-; CHECK-NEXT:  ## BB#1:
-; CHECK-NEXT:    movb $-1, %al
-; CHECK-NEXT:  LBB29_2:
-; CHECK-NEXT:    vfpclassss $4, %xmm0, %k0
 ; CHECK-NEXT:    kmovw %k0, %ecx
-; CHECK-NEXT:    testb %cl, %cl
-; CHECK-NEXT:    je LBB29_4
-; CHECK-NEXT:  ## BB#3:
-; CHECK-NEXT:    movb $-1, %cl
-; CHECK-NEXT:  LBB29_4:
+; CHECK-NEXT:    vfpclassss $4, %xmm0, %k0
+; CHECK-NEXT:    kmovw %k0, %eax
 ; CHECK-NEXT:    addb %cl, %al
 ; CHECK-NEXT:    ## kill: %AL<def> %AL<kill> %AX<kill>
 ; CHECK-NEXT:    retq