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AVX-512: fixed a bug in lowering VSELECT for 512-bit vector

Browse Source 
https://llvm.org/bugs/show_bug.cgi?id=23634



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238195 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Elena Demikhovsky 2015-05-26 11:32:39 +00:00
parent d714fcf5c8
commit 55fd78065f
2 changed files with 36 additions and 1 deletions
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2
lib/Target/X86/X86ISelLowering.cpp
View File

@ -21710,7 +21710,7 @@ static SDValue PerformSELECTCombine(SDNode *N, SelectionDAG &DAG,
// know will be matched by LowerVECTOR_SHUFFLEtoBlend.
if ((N->getOpcode() == ISD::VSELECT ||
N->getOpcode() == X86ISD::SHRUNKBLEND) &&
!DCI.isBeforeLegalize()) {
!DCI.isBeforeLegalize() && !VT.is512BitVector()) {
SDValue Shuffle = transformVSELECTtoBlendVECTOR_SHUFFLE(N, DAG, Subtarget);
if (Shuffle.getNode())
return Shuffle;

35
test/CodeGen/X86/avx512-bugfix-23634.ll Normal file
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@ -0,0 +1,35 @@
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-apple-darwin -mcpu=knl | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; CHECK-LABEL: f_fu
; CHECK-NOT: vpblend
; CHECK: vmovdqa32 {{.*}} {%k1}
define void @f_fu(float* %ret, float* %aa, float %b) {
allocas:
%ptr_cast_for_load = bitcast float* %aa to <16 x float>*
%ptr_masked_load.39 = load <16 x float>, <16 x float>* %ptr_cast_for_load, align 4
%b_load_to_int32 = fptosi float %b to i32
%b_load_to_int32_broadcast_init = insertelement <16 x i32> undef, i32 %b_load_to_int32, i32 0
%b_load_to_int32_broadcast = shufflevector <16 x i32> %b_load_to_int32_broadcast_init, <16 x i32> undef, <16 x i32> zeroinitializer
%b_to_int32 = fptosi float %b to i32
%b_to_int32_broadcast_init = insertelement <16 x i32> undef, i32 %b_to_int32, i32 0
%b_to_int32_broadcast = shufflevector <16 x i32> %b_to_int32_broadcast_init, <16 x i32> undef, <16 x i32> zeroinitializer
%a_load_to_int32 = fptosi <16 x float> %ptr_masked_load.39 to <16 x i32>
%div_v019_load_ = sdiv <16 x i32> %b_to_int32_broadcast, <i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2>
%v1.i = select <16 x i1> <i1 false, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true, i1 false, i1 true>, <16 x i32> <i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17>, <16 x i32> %a_load_to_int32
%foo_test = add <16 x i32> %div_v019_load_, %b_load_to_int32_broadcast
%add_struct_offset_y_struct_offset33_x = add <16 x i32> %foo_test, %v1.i
%val = sitofp <16 x i32> %add_struct_offset_y_struct_offset33_x to <16 x float>
%ptrcast = bitcast float* %ret to <16 x float>*
store <16 x float> %val, <16 x float>* %ptrcast, align 4
ret void
}