[llvm] r238195 - AVX-512: fixed a bug in lowering VSELECT for 512-bit vector

[Elena Demikhovsky]

Author: delena
Date: Tue May 26 06:32:39 2015
New Revision: 238195

URL: http://llvm.org/viewvc/llvm-project?rev=238195&view=rev
Log:
AVX-512: fixed a bug in lowering VSELECT for 512-bit vector

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


Added:
    llvm/trunk/test/CodeGen/X86/avx512-bugfix-23634.ll
Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=238195&r1=238194&r2=238195&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Tue May 26 06:32:39 2015
@@ -21710,7 +21710,7 @@ static SDValue PerformSELECTCombine(SDNo
   // 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;

Added: llvm/trunk/test/CodeGen/X86/avx512-bugfix-23634.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/avx512-bugfix-23634.ll?rev=238195&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/X86/avx512-bugfix-23634.ll (added)
+++ llvm/trunk/test/CodeGen/X86/avx512-bugfix-23634.ll Tue May 26 06:32:39 2015
@@ -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
+}
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