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1; RUN: opt -S -passes=loop-rotate < %s | FileCheck --check-prefix=FULL %s2; RUN: opt -S -passes=loop-rotate -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s3; RUN: opt -S -passes='require<target-ir>,require<assumptions>,loop(loop-rotate)' < %s | FileCheck --check-prefix=FULL %s4; RUN: opt -S -passes='require<target-ir>,require<assumptions>,loop(loop-rotate)' -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s5 6; Test case to make sure loop-rotate avoids rotating during the prepare-for-lto7; stage, when the header contains a call which may be inlined during the LTO stage.8define void @test_prepare_for_lto() {9; FULL-LABEL: @test_prepare_for_lto(10; FULL-NEXT: entry:11; FULL-NEXT: %array = alloca [20 x i32], align 1612; FULL-NEXT: call void @may_be_inlined()13; FULL-NEXT: br label %for.body14;15; PREPARE-LABEL: @test_prepare_for_lto(16; PREPARE-NEXT: entry:17; PREPARE-NEXT: %array = alloca [20 x i32], align 1618; PREPARE-NEXT: br label %for.cond19;20entry:21 %array = alloca [20 x i32], align 1622 br label %for.cond23 24for.cond: ; preds = %for.body, %entry25 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]26 %cmp = icmp slt i32 %i.0, 10027 call void @may_be_inlined()28 br i1 %cmp, label %for.body, label %for.end29 30for.body: ; preds = %for.cond31 store i32 0, ptr %array, align 1632 %inc = add nsw i32 %i.0, 133 br label %for.cond34 35for.end: ; preds = %for.cond36 ret void37}38 39define void @may_be_inlined() {40 ret void41}42 43; Intrinsics, like @llvm.dbg.value are never inlined and should not block loop44; rotation, even when preparing for LTO.45define void @test_prepare_for_lto_intrinsic() !dbg !7 {46; FULL-LABEL: @test_prepare_for_lto_intrinsic(47; FULL-NEXT: entry:48; FULL-NEXT: %array = alloca [20 x i32], align 1649; FULL-NEXT: #dbg_value(i32 0, !12, !DIExpression(), !1350; FULL-NEXT: br label %for.body51;52; PREPARE-LABEL: @test_prepare_for_lto_intrinsic(53; PREPARE-NEXT: entry:54; PREPARE-NEXT: %array = alloca [20 x i32], align 1655; PREPARE-NEXT: #dbg_value(i32 0, !12, !DIExpression(), !1356; PREPARE-NEXT: br label %for.body57;58entry:59 %array = alloca [20 x i32], align 1660 br label %for.cond61 62for.cond: ; preds = %for.body, %entry63 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]64 call void @llvm.dbg.value(metadata i32 %i.0, metadata !12, metadata !DIExpression()), !dbg !1365 %cmp = icmp slt i32 %i.0, 10066 br i1 %cmp, label %for.body, label %for.end67 68for.body: ; preds = %for.cond69 store i32 0, ptr %array, align 1670 %inc = add nsw i32 %i.0, 171 br label %for.cond72 73for.end: ; preds = %for.cond74 ret void75}76 77declare void @llvm.dbg.value(metadata, metadata, metadata) #278 79 80!llvm.dbg.cu = !{!0}81!llvm.module.flags = !{!3, !4, !5, !6}82 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")85!2 = !{}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)92!9 = !{null, !10}93!10 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)94!11 = !{!12}95!12 = !DILocalVariable(name: "input", arg: 1, scope: !7, file: !1, line: 2, type: !10)96!13 = !DILocation(line: 2, column: 15, scope: !7)97