File: buildvec-bitcast.ll

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llvm-toolchain-19 1%3A19.1.7-3
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
; RUN: llc < %s -mtriple=x86_64 -mattr=avx512bw | FileCheck %s

; Verify that the DAGCombiner doesn't change build_vector to concat_vectors if
; the vector element type is different than splat type. The example here:
;   v8i1 = build_vector (i8 (bitcast (v8i1 X))), ..., (i8 (bitcast (v8i1 X))))

define <8 x i1> @foo(<8 x i1> %mask.i1) {
; CHECK-LABEL: foo:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    vxorps %xmm0, %xmm0, %xmm0
; CHECK-NEXT:    retq
entry:
  %0 = and <8 x i1> %mask.i1, <i1 true, i1 false, i1 false, i1 false, i1 false, i1 false, i1 false, i1 false>
  %1 = bitcast <8 x i1> %0 to i8
  %2 = icmp ne i8 %1, 0
  %insert54 = insertelement <8 x i1> zeroinitializer, i1 %2, i64 0
  %splat55 = shufflevector <8 x i1> %insert54, <8 x i1> zeroinitializer, <8 x i32> zeroinitializer
  %3 = and <8 x i1> %0, %splat55
  br label %end

end:                           ; preds = %entry
  %4 = select <8 x i1> %3, <8 x i1> zeroinitializer, <8 x i1> zeroinitializer
  ret <8 x i1> %4
}