1; RUN: opt -passes='loop(simple-loop-unswitch)' -S < %s | FileCheck %s
2; RUN: opt -passes='loop-mssa(simple-loop-unswitch)' -S < %s | FileCheck %s
3
4; Check that SimpleLoopUnswitch's unswitchTrivialBranch() and unswitchTrivialSwitch()
5; propagates debug locations to the new terminators replacing the old ones.
6
7define i32 @test1(ptr %var, i1 %cond1, i1 %cond2) !dbg !5 {
8; CHECK-LABEL: define i32 @test1(
9; CHECK:       loop_begin:
10; CHECK-NEXT:    br label %[[CONTINUE:.*]], !dbg [[DBG8:![0-9]+]]
11;
12entry:
13  br label %loop_begin, !dbg !8
14
15loop_begin:                                       ; preds = %do_something, %entry
16  br i1 %cond1, label %continue, label %loop_exit, !dbg !9
17
18continue:                                         ; preds = %loop_begin
19  %var_val = load i32, ptr %var, align 4, !dbg !10
20  br i1 %cond2, label %do_something, label %loop_exit, !dbg !11
21
22do_something:                                     ; preds = %continue
23  call void @some_func(), !dbg !12
24  br label %loop_begin, !dbg !13
25
26loop_exit:                                        ; preds = %continue, %loop_begin
27  ret i32 0, !dbg !14
28}
29
30define i32 @test7(i32 %cond1, i32 %x, i32 %y) !dbg !15 {
31; CHECK-LABEL: define i32 @test7(
32; CHECK-SAME: i32 [[COND1:%.*]], i32 [[X:%.*]], i32 [[Y:%.*]])
33; CHECK-NEXT:  entry:
34; CHECK-NEXT:    switch i32 [[COND1]], label %[[ENTRY_SPLIT:.*]] [
35; CHECK-NEXT:      i32 0, label %[[LOOP_EXIT:.*]]
36; CHECK-NEXT:      i32 1, label %[[LOOP_EXIT]]
37; CHECK-NEXT:    ], !dbg [[DBG16:![0-9]+]]
38; CHECK:       loop_begin:
39; CHECK-NEXT:    br label %[[LATCH:.*]], !dbg [[DBG16]]
40;
41entry:
42  br label %loop_begin, !dbg !16
43
44loop_begin:                                       ; preds = %latch, %entry
45  switch i32 %cond1, label %latch [
46  i32 0, label %loop_exit
47  i32 1, label %loop_exit
48  ], !dbg !17
49
50latch:                                            ; preds = %loop_begin
51  call void @some_func(), !dbg !18
52  br label %loop_begin, !dbg !19
53
54loop_exit:                                        ; preds = %loop_begin, %loop_begin
55  %result1 = phi i32 [ %x, %loop_begin ], [ %x, %loop_begin ], !dbg !20
56  %result2 = phi i32 [ %y, %loop_begin ], [ %y, %loop_begin ], !dbg !21
57  %result = add i32 %result1, %result2, !dbg !22
58  ret i32 %result, !dbg !23
59}
60
61; Function Attrs: noreturn
62declare void @some_func()
63
64!llvm.dbg.cu = !{!0}
65!llvm.debugify = !{!2, !3}
66!llvm.module.flags = !{!4}
67
68; CHECK: [[DBG8]] = !DILocation(line: 2,
69
70; CHECK: [[DBG16]] = !DILocation(line: 9,
71
72!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
73!1 = !DIFile(filename: "test2.ll", directory: "/")
74!2 = !{i32 15}
75!3 = !{i32 0}
76!4 = !{i32 2, !"Debug Info Version", i32 3}
77!5 = distinct !DISubprogram(name: "test1", linkageName: "test1", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
78!6 = !DISubroutineType(types: !7)
79!7 = !{}
80!8 = !DILocation(line: 1, column: 1, scope: !5)
81!9 = !DILocation(line: 2, column: 1, scope: !5)
82!10 = !DILocation(line: 3, column: 1, scope: !5)
83!11 = !DILocation(line: 4, column: 1, scope: !5)
84!12 = !DILocation(line: 5, column: 1, scope: !5)
85!13 = !DILocation(line: 6, column: 1, scope: !5)
86!14 = !DILocation(line: 7, column: 1, scope: !5)
87!15 = distinct !DISubprogram(name: "test7", linkageName: "test7", scope: null, file: !1, line: 8, type: !6, scopeLine: 8, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
88!16 = !DILocation(line: 8, column: 1, scope: !15)
89!17 = !DILocation(line: 9, column: 1, scope: !15)
90!18 = !DILocation(line: 10, column: 1, scope: !15)
91!19 = !DILocation(line: 11, column: 1, scope: !15)
92!20 = !DILocation(line: 12, column: 1, scope: !15)
93!21 = !DILocation(line: 13, column: 1, scope: !15)
94!22 = !DILocation(line: 14, column: 1, scope: !15)
95!23 = !DILocation(line: 15, column: 1, scope: !15)
96