102 lines
4.3 KiB
LLVM
102 lines
4.3 KiB
LLVM
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; RUN: opt -S -loop-rotate < %s | FileCheck --check-prefix=FULL %s
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; RUN: opt -S -loop-rotate -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s
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; RUN: opt -S -passes='require<targetir>,require<assumptions>,loop(loop-rotate)' < %s | FileCheck --check-prefix=FULL %s
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; RUN: opt -S -passes='require<targetir>,require<assumptions>,loop(loop-rotate)' -rotation-prepare-for-lto < %s | FileCheck --check-prefix=PREPARE %s
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; Test case to make sure loop-rotate avoids rotating during the prepare-for-lto
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; stage, when the header contains a call which may be inlined during the LTO stage.
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define void @test_prepare_for_lto() {
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; FULL-LABEL: @test_prepare_for_lto(
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; FULL-NEXT: entry:
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; FULL-NEXT: %array = alloca [20 x i32], align 16
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; FULL-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
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; FULL-NEXT: call void @may_be_inlined()
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; FULL-NEXT: br label %for.body
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;
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; PREPARE-LABEL: @test_prepare_for_lto(
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; PREPARE-NEXT: entry:
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; PREPARE-NEXT: %array = alloca [20 x i32], align 16
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; PREPARE-NEXT: br label %for.cond
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;
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entry:
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%array = alloca [20 x i32], align 16
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%cmp = icmp slt i32 %i.0, 100
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%arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
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call void @may_be_inlined()
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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store i32 0, i32* %arrayidx, align 16
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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define void @may_be_inlined() {
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ret void
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}
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; Intrinsics, like @llvm.dbg.value are never inlined and should not block loop
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; rotation, even when preparing for LTO.
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define void @test_prepare_for_lto_intrinsic() !dbg !7 {
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; FULL-LABEL: @test_prepare_for_lto_intrinsic(
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; FULL-NEXT: entry:
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; FULL-NEXT: %array = alloca [20 x i32], align 16
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; FULL-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
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; FULL-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
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; FULL-NEXT: br label %for.body
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;
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; PREPARE-LABEL: @test_prepare_for_lto_intrinsic(
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; PREPARE-NEXT: entry:
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; PREPARE-NEXT: %array = alloca [20 x i32], align 16
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; PREPARE-NEXT: call void @llvm.dbg.value(metadata i32 0, metadata !12, metadata !DIExpression()), !dbg !13
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; PREPARE-NEXT: %arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
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; PREPARE-NEXT: br label %for.body
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;
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entry:
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%array = alloca [20 x i32], align 16
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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call void @llvm.dbg.value(metadata i32 %i.0, metadata !12, metadata !DIExpression()), !dbg !13
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%cmp = icmp slt i32 %i.0, 100
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%arrayidx = getelementptr inbounds [20 x i32], [20 x i32]* %array, i64 0, i64 0
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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store i32 0, i32* %arrayidx, align 16
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5, !6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "test.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{i32 7, !"PIC Level", i32 2}
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!7 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null, !10}
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!10 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "input", arg: 1, scope: !7, file: !1, line: 2, type: !10)
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!13 = !DILocation(line: 2, column: 15, scope: !7)
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