[LLVMbugs] [Bug 20723] New: [AVX512] Cannot select: 0x7fd80b841b68: ch = store when returning <16 x i1> from function

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=20723

            Bug ID: 20723
           Summary: [AVX512] Cannot select: 0x7fd80b841b68: ch = store
                    when returning <16 x i1> from function
           Product: new-bugs
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: matt at pharr.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

With top of tree and this program, I get the following crash:

; ModuleID = 'bugpoint-reduced-simplified.bc'
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-darwin13.3.0"

define <16 x i1> @crashEven___(i16 %__mask) {
allocas:
  ret <16 x i1> zeroinitializer
}


% llc -mcpu=knl bugpoint-reduced-simplified.ll -filetype=asm -o -
    .section    __TEXT,__text,regular,pure_instructions
    .macosx_version_min 13, 3
LLVM ERROR: Cannot select: 0x7fd80b841b68: ch = store 0x7fd80b841640,
0x7fd80b841118, 0x7fd80b841538, 0x7fd80b841a60<ST2[<unknown>](align=16)>
[ORD=2] [ID=11]
  0x7fd80b841118: v16i1 = BUILD_VECTOR 0x7fd80b841010, 0x7fd80b841010,
0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010,
0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010,
0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010, 0x7fd80b841010 [ORD=2] [ID=8]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
    0x7fd80b841010: i1 = TargetConstant<0> [ID=6]
  0x7fd80b841538: i64 = Register %vreg3 [ID=3]
  0x7fd80b841a60: i64 = undef [ID=4]
In function: crashEven___
%

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