1 ; RUN: opt -S -passes=loop-rotate < %s | FileCheck --check-prefix=FULL %s
2 ; RUN: opt -S -passes=loop-rotate -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s
3 ; RUN: opt -S -passes='require<target-ir>,require<assumptions>,loop(loop-rotate)' < %s | FileCheck --check-prefix=FULL %s
4 ; RUN: opt -S -passes='require<target-ir>,require<assumptions>,loop(loop-rotate)' -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s
6 ; Test case to make sure loop-rotate avoids rotating during the prepare-for-lto
7 ; stage, when the header contains a call which may be inlined during the LTO stage.
8 define void @test_prepare_for_lto() {
9 ; FULL-LABEL: @test_prepare_for_lto(
11 ; FULL-NEXT: %array = alloca [20 x i32], align 16
12 ; FULL-NEXT: call void @may_be_inlined()
13 ; FULL-NEXT: br label %for.body
15 ; PREPARE-LABEL: @test_prepare_for_lto(
16 ; PREPARE-NEXT: entry:
17 ; PREPARE-NEXT: %array = alloca [20 x i32], align 16
18 ; PREPARE-NEXT: br label %for.cond
21 %array = alloca [20 x i32], align 16
24 for.cond: ; preds = %for.body, %entry
25 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
26 %cmp = icmp slt i32 %i.0, 100
27 call void @may_be_inlined()
28 br i1 %cmp, label %for.body, label %for.end
30 for.body: ; preds = %for.cond
31 store i32 0, ptr %array, align 16
32 %inc = add nsw i32 %i.0, 1
35 for.end: ; preds = %for.cond
39 define void @may_be_inlined() {
43 ; Intrinsics, like @llvm.dbg.value are never inlined and should not block loop
44 ; rotation, even when preparing for LTO.
45 define void @test_prepare_for_lto_intrinsic() !dbg !7 {
46 ; FULL-LABEL: @test_prepare_for_lto_intrinsic(
48 ; FULL-NEXT: %array = alloca [20 x i32], align 16
49 ; FULL-NEXT: #dbg_value(i32 0, !12, !DIExpression(), !13
50 ; FULL-NEXT: br label %for.body
52 ; PREPARE-LABEL: @test_prepare_for_lto_intrinsic(
53 ; PREPARE-NEXT: entry:
54 ; PREPARE-NEXT: %array = alloca [20 x i32], align 16
55 ; PREPARE-NEXT: #dbg_value(i32 0, !12, !DIExpression(), !13
56 ; PREPARE-NEXT: br label %for.body
59 %array = alloca [20 x i32], align 16
62 for.cond: ; preds = %for.body, %entry
63 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
64 call void @llvm.dbg.value(metadata i32 %i.0, metadata !12, metadata !DIExpression()), !dbg !13
65 %cmp = icmp slt i32 %i.0, 100
66 br i1 %cmp, label %for.body, label %for.end
68 for.body: ; preds = %for.cond
69 store i32 0, ptr %array, align 16
70 %inc = add nsw i32 %i.0, 1
73 for.end: ; preds = %for.cond
77 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
81 !llvm.module.flags = !{!3, !4, !5, !6}
83 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
84 !1 = !DIFile(filename: "test.c", directory: "/tmp")
86 !3 = !{i32 2, !"Dwarf Version", i32 4}
87 !4 = !{i32 2, !"Debug Info Version", i32 3}
88 !5 = !{i32 1, !"wchar_size", i32 4}
89 !6 = !{i32 7, !"PIC Level", i32 2}
90 !7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
91 !8 = !DISubroutineType(types: !9)
93 !10 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
95 !12 = !DILocalVariable(name: "input", arg: 1, scope: !7, file: !1, line: 2, type: !10)
96 !13 = !DILocation(line: 2, column: 15, scope: !7)