| ; RUN: llc -asm-verbose=0 -mtriple aarch64-arm-none-eabi < %s | FileCheck %s |
| |
| ; The following code previously broke in the DAGCombiner. Specifically, trying to combine: |
| ; extract_vector_elt (concat_vectors v4i16:a, v4i16:b), x |
| ; -> extract_vector_elt a, x |
| |
| define half @test_combine_extract_concat_vectors(<4 x i16> %a) nounwind { |
| entry: |
| %0 = shufflevector <4 x i16> %a, <4 x i16> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7> |
| %1 = bitcast <8 x i16> %0 to <8 x half> |
| %2 = extractelement <8 x half> %1, i32 3 |
| ret half %2 |
| } |
| |
| ; CHECK-LABEL: test_combine_extract_concat_vectors: |
| ; CHECK-NEXT: mov h0, v0.h[3] |
| ; CHECK-NEXT: ret |