145 lines
6.1 KiB
LLVM
145 lines
6.1 KiB
LLVM
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; RUN: opt < %s -instcombine -verify -S -o - | FileCheck %s
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; Hand-reduced from this example.
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; -g -O -mllvm -disable-llvm-optzns -gno-column-info
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; plus opt -sroa -instcombine -inline
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; #include <stdio.h>
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;
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; struct S1 {
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; int p1;
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; int p2;
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;
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; bool IsNull ( ) {
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; return p1 == 0;
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; }
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; };
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;
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; S1 foo ( void );
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;
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; int bar ( ) {
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;
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; S1 result = foo();
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;
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; if ( result.IsNull() )
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; return 0;
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;
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; result.p1 = 2;
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; result.p2 = 3;
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;
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; int* ptr = &result.p1;
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;
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; printf("%d", *ptr);
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; printf("%d", *(ptr+1));
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;
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; return result.p1 + 1;
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; }
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; CHECK: _Z3barv
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; CHECK: llvm.dbg.declare(metadata i64* %{{.*}}, metadata [[METADATA_IDX1:![0-9]+]]
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; CHECK-NOT: llvm.dbg.declare(metadata %struct.S1* %{{.*}}, metadata [[METADATA_IDX1]]
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; CHECK: ret
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; CHECK: DICompileUnit
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; CHECK: [[METADATA_IDX1]] = !DILocalVariable(name: "result"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S1 = type { i32, i32 }
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@.str = private unnamed_addr constant [3 x i8] c"%d\00", align 1
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define dso_local i32 @_Z3barv() !dbg !7 {
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entry:
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%result = alloca i64, align 8
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%tmpcast = bitcast i64* %result to %struct.S1*
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%0 = bitcast i64* %result to i8*, !dbg !24
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call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %0) #4, !dbg !24
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call void @llvm.dbg.declare(metadata %struct.S1* %tmpcast, metadata !12, metadata !DIExpression()), !dbg !24
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%call = call i64 @_Z3foov(), !dbg !24
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store i64 %call, i64* %result, align 8, !dbg !24
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call void @llvm.dbg.value(metadata %struct.S1* %tmpcast, metadata !25, metadata !DIExpression()), !dbg !29
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%p1.i = getelementptr inbounds %struct.S1, %struct.S1* %tmpcast, i64 0, i32 0, !dbg !32
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%1 = load i32, i32* %p1.i, align 4, !dbg !32
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%cmp.i = icmp eq i32 %1, 0, !dbg !32
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br i1 %cmp.i, label %if.then, label %if.end, !dbg !38
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if.then: ; preds = %entry
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br label %cleanup, !dbg !38
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if.end: ; preds = %entry
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%p1 = bitcast i64* %result to i32*, !dbg !38
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store i32 2, i32* %p1, align 8, !dbg !38
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%p2 = getelementptr inbounds %struct.S1, %struct.S1* %tmpcast, i64 0, i32 1, !dbg !38
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store i32 3, i32* %p2, align 4, !dbg !38
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%p12 = bitcast i64* %result to i32*, !dbg !38
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call void @llvm.dbg.value(metadata i32* %p12, metadata !22, metadata !DIExpression()), !dbg !38
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%call3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 2), !dbg !38
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%add.ptr = getelementptr inbounds i32, i32* %p12, i64 1, !dbg !38
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%2 = load i32, i32* %add.ptr, align 4, !dbg !38
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%call4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32 %2), !dbg !38
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%p15 = bitcast i64* %result to i32*, !dbg !38
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%3 = load i32, i32* %p15, align 8, !dbg !38
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%add = add nsw i32 %3, 1, !dbg !38
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br label %cleanup
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cleanup: ; preds = %if.end, %if.then
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%retval.0 = phi i32 [ 0, %if.then ], [ %add, %if.end ], !dbg !38
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%4 = bitcast i64* %result to i8*, !dbg !38
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call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %4) #4, !dbg !38
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ret i32 %retval.0, !dbg !38
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}
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
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declare dso_local i64 @_Z3foov() #3
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declare dso_local i32 @printf(i8*, ...) #3
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
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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}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "test.cpp", directory: "")
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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 = !{!"clang"}
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!7 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", scope: !1, file: !1, line: 15, type: !8, scopeLine: 15, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !22}
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!12 = !DILocalVariable(name: "result", scope: !7, file: !1, line: 17, type: !13)
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!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S1", file: !1, line: 4, size: 64, flags: DIFlagTypePassByValue, elements: !14, identifier: "_ZTS2S1")
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!14 = !{!15, !16, !17}
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!15 = !DIDerivedType(tag: DW_TAG_member, name: "p1", scope: !13, file: !1, line: 5, baseType: !10, size: 32)
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "p2", scope: !13, file: !1, line: 6, baseType: !10, size: 32, offset: 32)
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!17 = !DISubprogram(name: "IsNull", linkageName: "_ZN2S16IsNullEv", scope: !13, file: !1, line: 8, type: !18, scopeLine: 8, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized)
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!18 = !DISubroutineType(types: !19)
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!19 = !{!20, !21}
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!20 = !DIBasicType(name: "bool", size: 8, encoding: DW_ATE_boolean)
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!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!22 = !DILocalVariable(name: "ptr", scope: !7, file: !1, line: 25, type: !23)
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!23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !10, size: 64)
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!24 = !DILocation(line: 17, scope: !7)
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!25 = !DILocalVariable(name: "this", arg: 1, scope: !26, type: !28, flags: DIFlagArtificial | DIFlagObjectPointer)
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!26 = distinct !DISubprogram(name: "IsNull", linkageName: "_ZN2S16IsNullEv", scope: !13, file: !1, line: 8, type: !18, scopeLine: 8, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, declaration: !17, retainedNodes: !27)
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!27 = !{!25}
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!28 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64)
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!29 = !DILocation(line: 0, scope: !26, inlinedAt: !30)
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!30 = distinct !DILocation(line: 19, scope: !31)
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!31 = distinct !DILexicalBlock(scope: !7, file: !1, line: 19)
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!32 = !DILocation(line: 9, scope: !26, inlinedAt: !30)
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!38 = !DILocation(line: 0, scope: !7)
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