xref: /llvm-project/llvm/test/Transforms/LoopVectorize/vect.omp.persistence.ll (revision 2f80ea7f4f7e93c57af30c2243082bb8c817052b)
1; RUN: opt < %s -O2 -force-vector-interleave=2 -force-vector-width=4 -debug-only=loop-vectorize -S 2>&1 | FileCheck %s
2; REQUIRES: asserts
3
4; CHECK: LV: Checking a loop in 'foo'
5; CHECK: LV: Loop hints: force=enabled
6
7target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
8
9; Ensure that "llvm.loop.vectorize.enable" metadata was not lost even
10; if loop was not rotated.
11;
12; See http://reviews.llvm.org/D3348 for details.
13;
14; CHECK-LABEL: @foo
15; CHECK: !llvm.loop !0
16; CHECK: !0 = distinct !{!0, !1}
17; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true}
18define i32 @foo(i32 %a) {
19entry:
20  br label %loop_cond
21
22loop_cond:
23  %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ]
24  %cmp = icmp ne i32 %indx, %a
25  br i1 %cmp, label %return, label %loop_inc
26
27loop_inc:
28  %inc = add i32 %indx, 1
29  br label %loop_cond, !llvm.loop !0
30
31return:
32  ret i32 0
33}
34
35!0 = !{!0, !1}
36!1 = !{!"llvm.loop.vectorize.enable", i1 true}
37