File: regress-combine-extract-vectors.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (17 lines) | stat: -rw-r--r-- 647 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
; RUN: llc -asm-verbose=0 -mtriple aarch64 < %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