1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt < %s -instcombine -S | FileCheck %s
4 target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
5 target triple = "armv8-arm-none-eabi"
7 ; Turning a table lookup intrinsic into a shuffle vector instruction
8 ; can be beneficial. If the mask used for the lookup is the constant
9 ; vector {7,6,5,4,3,2,1,0}, then the back-end generates rev64
10 ; instructions instead.
12 define <8 x i8> @tbl1_8x8(<8 x i8> %vec) {
13 ; CHECK-LABEL: @tbl1_8x8(
15 ; CHECK-NEXT: [[TMP0:%.*]] = shufflevector <8 x i8> [[VEC:%.*]], <8 x i8> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
16 ; CHECK-NEXT: ret <8 x i8> [[TMP0]]
19 %vtbl1 = call <8 x i8> @llvm.arm.neon.vtbl1(<8 x i8> %vec, <8 x i8> <i8 7, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
23 ; Bail the optimization if a mask index is out of range.
24 define <8 x i8> @tbl1_8x8_out_of_range(<8 x i8> %vec) {
25 ; CHECK-LABEL: @tbl1_8x8_out_of_range(
27 ; CHECK-NEXT: [[VTBL1:%.*]] = call <8 x i8> @llvm.arm.neon.vtbl1(<8 x i8> [[VEC:%.*]], <8 x i8> <i8 8, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
28 ; CHECK-NEXT: ret <8 x i8> [[VTBL1]]
31 %vtbl1 = call <8 x i8> @llvm.arm.neon.vtbl1(<8 x i8> %vec, <8 x i8> <i8 8, i8 6, i8 5, i8 4, i8 3, i8 2, i8 1, i8 0>)
35 declare <8 x i8> @llvm.arm.neon.vtbl1(<8 x i8>, <8 x i8>)