File: 2012-03-13-DAGCombineBug.ll

package info (click to toggle)
llvm-3.1 3.1-1
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 80,224 kB
  • sloc: cpp: 491,014; asm: 110,971; ansic: 14,579; sh: 13,120; python: 6,152; ml: 4,719; makefile: 1,830; pascal: 1,553; perl: 874; xml: 283; lisp: 187; csh: 117; exp: 4
file content (15 lines) | stat: -rw-r--r-- 570 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
; RUN: llc < %s -mtriple=thumbv7-apple-ios | FileCheck %s
; rdar://11035895

; DAG combine incorrectly optimize (i32 vextract (v4i16 load $addr), c) to
; (i16 load $addr+c*sizeof(i16)). It should have issued an extload instead. i.e.
; (i32 extload $addr+c*sizeof(i16)
define void @test_hi_short3(<3 x i16> * nocapture %srcA, <2 x i16> * nocapture %dst) nounwind {
entry:
; CHECK: vst1.32
  %0 = load <3 x i16> * %srcA, align 8
  %1 = shufflevector <3 x i16> %0, <3 x i16> undef, <2 x i32> <i32 2, i32 undef>
  store <2 x i16> %1, <2 x i16> * %dst, align 4
  ret void
}