1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; REQUIRES: asserts
3; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -loop-simplifycfg -verify-loop-info -verify-dom-info -verify-loop-lcssa < %s | FileCheck %s
4; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -passes='require<domtree>,loop(simplify-cfg)' -verify-loop-info -verify-dom-info -verify-loop-lcssa < %s | FileCheck %s
5; RUN: opt -S -enable-loop-simplifycfg-term-folding=true -loop-simplifycfg -enable-mssa-loop-dependency=true -verify-memoryssa -verify-loop-info -verify-dom-info -verify-loop-lcssa < %s | FileCheck %s
6; XFAIL: *
7; test_01 is currently failing because the loop is not in LCSSA form after the
8; transform.
9
10target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
11
12define void @c() {
13; CHECK-LABEL: @c(
14; CHECK-NEXT:  entry:
15; CHECK-NEXT:    br label [[D:%.*]]
16; CHECK:       d.loopexit:
17; CHECK-NEXT:    [[DOTLCSSA:%.*]] = phi i32 [ [[TMP1:%.*]], [[FOR_COND:%.*]] ]
18; CHECK-NEXT:    br label [[D]]
19; CHECK:       d:
20; CHECK-NEXT:    [[TMP0:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ [[DOTLCSSA]], [[D_LOOPEXIT:%.*]] ]
21; CHECK-NEXT:    br label [[FOR_COND]]
22; CHECK:       for.cond:
23; CHECK-NEXT:    [[TMP1]] = phi i32 [ [[TMP0]], [[D]] ], [ 0, [[IF_END:%.*]] ]
24; CHECK-NEXT:    [[TOBOOL2:%.*]] = icmp eq i32 [[TMP1]], 0
25; CHECK-NEXT:    br i1 [[TOBOOL2]], label [[IF_END]], label [[D_LOOPEXIT]]
26; CHECK:       if.end:
27; CHECK-NEXT:    br label [[FOR_COND]]
28;
29entry:
30  br label %d
31
32d.loopexit:                                       ; preds = %if.end.7, %for.body
33  %.lcssa = phi i32 [ %1, %for.body ], [ 0, %if.end.7 ]
34  br label %d
35
36d:                                                ; preds = %d.loopexit, %entry
37  %0 = phi i32 [ undef, %entry ], [ %.lcssa, %d.loopexit ]
38  br label %for.cond
39
40for.cond:                                         ; preds = %if.end.8, %d
41  %1 = phi i32 [ %0, %d ], [ 0, %if.end.8 ]
42  br label %for.body
43
44for.body:                                         ; preds = %for.cond
45  %tobool2 = icmp eq i32 %1, 0
46  br i1 %tobool2, label %if.end, label %d.loopexit
47
48if.end:                                           ; preds = %for.body
49  br label %if.end.7
50
51if.end.7:                                         ; preds = %if.end
52  br i1 true, label %if.end.8, label %d.loopexit
53
54if.end.8:                                         ; preds = %if.end.7
55  br label %for.cond
56}
57
58define void @test_01() {
59entry:
60  br label %for.cond
61
62for.cond.loopexit:                                ; preds = %while.cond
63  %inc41.lcssa = phi i16 [ %inc41, %while.cond ]
64  br label %for.cond
65
66for.cond:                                         ; preds = %for.cond.loopexit, %entry
67  %inc41.lcssa3 = phi i16 [ %inc41.lcssa, %for.cond.loopexit ], [ undef, %entry ]
68  br label %while.cond
69
70while.cond:                                       ; preds = %while.body, %for.cond
71  %inc41 = phi i16 [ %inc4, %while.body ], [ %inc41.lcssa3, %for.cond ]
72  br i1 true, label %while.body, label %for.cond.loopexit
73
74while.body:                                       ; preds = %while.cond
75  %inc4 = add nsw i16 %inc41, 1
76  br label %while.cond
77}
78