xref: /llvm-project/llvm/test/Transforms/LoopRotate/pr56260.ll (revision 04cd06906288dcb148de37d7c3e6c009c3e3b726)
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -passes='loop(loop-rotate,loop-deletion)' -S | FileCheck %s
3
4target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
5
6define void @main() {
7; CHECK-LABEL: @main(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br label [[L0_PREHEADER:%.*]]
10; CHECK:       L0.L0.preheader.loopexit_crit_edge:
11; CHECK-NEXT:    br label [[L0_PREHEADER_LOOPEXIT:%.*]]
12; CHECK:       L0.preheader.loopexit:
13; CHECK-NEXT:    br label [[L0_PREHEADER]]
14; CHECK:       L0.preheader:
15; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 0, 0
16; CHECK-NEXT:    [[INC:%.*]] = zext i1 [[CMP]] to i32
17; CHECK-NEXT:    [[TOBOOL3_NOT1:%.*]] = icmp eq i32 [[INC]], 0
18; CHECK-NEXT:    br i1 [[TOBOOL3_NOT1]], label [[L0_PREHEADER_LOOPEXIT]], label [[L1_PREHEADER_LR_PH:%.*]]
19; CHECK:       L1.preheader.lr.ph:
20; CHECK-NEXT:    br label [[L0_L0_PREHEADER_LOOPEXIT_CRIT_EDGE:%.*]]
21;
22entry:
23  br label %L0.preheader
24
25L0.preheader:
26  br label %L0
27
28L0:                                               ; preds = %L0.latch, %L0.preheader
29  %k.0 = phi i32 [ 0, %L0.preheader ], [ %spec.select, %L0.latch ]
30  %cmp = icmp slt i32 0, 0
31  %inc = zext i1 %cmp to i32
32  %spec.select = add nsw i32 %k.0, %inc
33  %tobool3.not = icmp eq i32 %spec.select, 0
34  br i1 %tobool3.not, label %L0.preheader, label %L1.preheader
35
36L1.preheader:
37  %tobool8.not = icmp eq i32 %k.0, 0
38  br label %L1
39
40L1:
41  br i1 %tobool8.not, label %L1.latch, label %L0.latch
42
43L1.latch:
44  br i1 false, label %L1, label %L0.latch
45
46L0.latch:
47  br label %L0
48}
49