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