| ; RUN: opt < %s -O2 -force-vector-interleave=2 -force-vector-width=4 -debug-only=loop-vectorize -S 2>&1 | FileCheck %s | |
| ; REQUIRES: asserts | |
| ; CHECK: LV: Checking a loop in "foo" | |
| ; CHECK: LV: Loop hints: force=enabled | |
| target 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" | |
| ; Ensure that "llvm.loop.vectorize.enable" metadata was not lost even | |
| ; if loop was not rotated. | |
| ; | |
| ; See http://reviews.llvm.org/D3348 for details. | |
| ; | |
| ; CHECK-LABEL: @foo | |
| ; CHECK: !llvm.loop !0 | |
| ; CHECK: !0 = distinct !{!0, !1} | |
| ; CHECK: !1 = !{!"llvm.loop.vectorize.enable", i1 true} | |
| define i32 @foo(i32 %a) { | |
| entry: | |
| br label %loop_cond | |
| loop_cond: | |
| %indx = phi i32 [ 1, %entry ], [ %inc, %loop_inc ] | |
| %cmp = icmp ne i32 %indx, %a | |
| br i1 %cmp, label %return, label %loop_inc | |
| loop_inc: | |
| %inc = add i32 %indx, 1 | |
| br label %loop_cond, !llvm.loop !0 | |
| return: | |
| ret i32 0 | |
| } | |
| !0 = !{!0, !1} | |
| !1 = !{!"llvm.loop.vectorize.enable", i1 true} |