test/Transforms/SLPVectorizer/X86/non-vectorizable-intrinsic.ll

; RUN: opt < %s -slp-vectorizer -o - -S -slp-threshold=-1000

target datalayout = "e-p:32:32-i64:64-v16:16-v32:32-n16:32:64"
target triple = "nvptx--nvidiacl"

; CTLZ cannot be vectorized currently because the second argument is a scalar
; for both the scalar and vector forms of the intrinsic. In the future it
; should be possible to vectorize such functions.
; Test causes an assert if LLVM tries to vectorize CTLZ.

define <2 x i8> @cltz_test(<2 x i8> %x) #0 {
entry:
  %0 = extractelement <2 x i8> %x, i32 0
  %call.i = call i8 @llvm.ctlz.i8(i8 %0, i1 false)
  %vecinit = insertelement <2 x i8> undef, i8 %call.i, i32 0
  %1 = extractelement <2 x i8> %x, i32 1
  %call.i4 = call i8 @llvm.ctlz.i8(i8 %1, i1 false)
  %vecinit2 = insertelement <2 x i8> %vecinit, i8 %call.i4, i32 1
  ret <2 x i8> %vecinit2
}

define <2 x i8> @cltz_test2(<2 x i8> %x) #1 {
entry:
  %0 = extractelement <2 x i8> %x, i32 0
  %1 = extractelement <2 x i8> %x, i32 1
  %call.i = call i8 @llvm.ctlz.i8(i8 %0, i1 false)
  %call.i4 = call i8 @llvm.ctlz.i8(i8 %1, i1 false)
  %vecinit = insertelement <2 x i8> undef, i8 %call.i, i32 0
  %vecinit2 = insertelement <2 x i8> %vecinit, i8 %call.i4, i32 1
  ret <2 x i8> %vecinit2
}

declare i8 @llvm.ctlz.i8(i8, i1) #3

attributes #0 = { alwaysinline nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind readnone }