File: vector-extract-elt.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; RUN: llc -mtriple=sparc < %s | FileCheck %s


; If computeKnownSignBits (in SelectionDAG) can do a simple
; look-thru for extractelement then we know that the add will yield a
; non-negative result.
define i1 @test1(ptr %in) {
; CHECK-LABEL: ! %bb.0:
; CHECK-NEXT:        retl
; CHECK-NEXT:        mov %g0, %o0
  %vec2 = load <4 x i16>, ptr %in, align 1
  %vec3 = lshr <4 x i16> %vec2, <i16 2, i16 2, i16 2, i16 2>
  %vec4 = sext <4 x i16> %vec3 to <4 x i32>
  %elt0 = extractelement <4 x i32> %vec4, i32 0
  %elt1 = extractelement <4 x i32> %vec4, i32 1
  %sum = add i32 %elt0, %elt1
  %bool = icmp slt i32 %sum, 0
  ret i1 %bool
}