| ; RUN: opt < %s -reassociate -S | FileCheck %s |
| |
| ; Check that reassociate pass now undefs debug intrinsics that reference a value |
| ; that gets dropped and cannot be salvaged. |
| |
| define hidden i32 @main() local_unnamed_addr { |
| entry: |
| %foo = alloca i32, align 4, !dbg !20 |
| %foo.0.foo.0..sroa_cast = bitcast i32* %foo to i8*, !dbg !20 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %foo.0.foo.0..sroa_cast), !dbg !20 |
| store volatile i32 4, i32* %foo, align 4, !dbg !20, !tbaa !21 |
| %foo.0.foo.0. = load volatile i32, i32* %foo, align 4, !dbg !25, !tbaa !21 |
| %foo.0.foo.0.15 = load volatile i32, i32* %foo, align 4, !dbg !27, !tbaa !21 |
| %foo.0.foo.0.16 = load volatile i32, i32* %foo, align 4, !dbg !28, !tbaa !21 |
| ; CHECK-NOT: %add = add nsw i32 %foo.0.foo.0., %foo.0.foo.0.15 |
| %add = add nsw i32 %foo.0.foo.0., %foo.0.foo.0.15, !dbg !29 |
| ; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata [[VAR_A:![0-9]+]], metadata !DIExpression()) |
| call void @llvm.dbg.value(metadata i32 %add, metadata !19, metadata !DIExpression()), !dbg !26 |
| %foo.0.foo.0.17 = load volatile i32, i32* %foo, align 4, !dbg !30, !tbaa !21 |
| %cmp = icmp eq i32 %foo.0.foo.0.17, 4, !dbg !30 |
| br i1 %cmp, label %if.then, label %if.end, !dbg !32 |
| |
| ; CHECK-LABEL: if.then: |
| if.then: |
| ; CHECK-NOT: %add1 = add nsw i32 %add, %foo.0.foo.0.16 |
| %add1 = add nsw i32 %add, %foo.0.foo.0.16, !dbg !33 |
| ; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata [[VAR_A]], metadata !DIExpression()) |
| call void @llvm.dbg.value(metadata i32 %add1, metadata !19, metadata !DIExpression()), !dbg !26 |
| ; CHECK: call void @llvm.dbg.value(metadata i32 undef, metadata [[VAR_CHEESE:![0-9]+]], metadata !DIExpression()) |
| call void @llvm.dbg.value(metadata i32 %add, metadata !18, metadata !DIExpression()), !dbg !26 |
| %sub = add nsw i32 %add, -12, !dbg !34 |
| %sub3 = sub nsw i32 %add1, %sub, !dbg !34 |
| %mul = mul nsw i32 %sub3, 20, !dbg !36 |
| %div = sdiv i32 %mul, 3, !dbg !37 |
| br label %if.end, !dbg !38 |
| |
| if.end: |
| %a.0 = phi i32 [ %div, %if.then ], [ 0, %entry ], !dbg !39 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %foo.0.foo.0..sroa_cast), !dbg !40 |
| ret i32 %a.0, !dbg !41 |
| } |
| |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1 |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #2 |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1 |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, debugInfoForProfiling: true, nameTableKind: None) |
| !1 = !DIFile(filename: "test.cpp", directory: "F:\") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 2} |
| !6 = !{i32 7, !"PIC Level", i32 2} |
| !7 = !{!"clang version 10.0.0"} |
| !8 = distinct !DISubprogram(name: "main", scope: !9, file: !9, line: 1, type: !10, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !13) |
| !9 = !DIFile(filename: "./test.cpp", directory: "F:\") |
| !10 = !DISubroutineType(types: !11) |
| !11 = !{!12} |
| !12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !13 = !{!14, !16, !17, !18, !19} |
| !14 = !DILocalVariable(name: "foo", scope: !8, file: !9, line: 2, type: !15) |
| !15 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !12) |
| !16 = !DILocalVariable(name: "read1", scope: !8, file: !9, line: 3, type: !12) |
| !17 = !DILocalVariable(name: "read2", scope: !8, file: !9, line: 4, type: !12) |
| ; CHECK: [[VAR_CHEESE]] = !DILocalVariable(name: "cheese" |
| !18 = !DILocalVariable(name: "cheese", scope: !8, file: !9, line: 6, type: !12) |
| ; CHECK: [[VAR_A]] = !DILocalVariable(name: "a" |
| !19 = !DILocalVariable(name: "a", scope: !8, file: !9, line: 7, type: !12) |
| !20 = !DILocation(line: 2, scope: !8) |
| !21 = !{!22, !22, i64 0} |
| !22 = !{!"int", !23, i64 0} |
| !23 = !{!"omnipotent char", !24, i64 0} |
| !24 = !{!"Simple C++ TBAA"} |
| !25 = !DILocation(line: 3, scope: !8) |
| !26 = !DILocation(line: 0, scope: !8) |
| !27 = !DILocation(line: 4, scope: !8) |
| !28 = !DILocation(line: 6, scope: !8) |
| !29 = !DILocation(line: 7, scope: !8) |
| !30 = !DILocation(line: 10, scope: !31) |
| !31 = distinct !DILexicalBlock(scope: !8, file: !9, line: 10) |
| !32 = !DILocation(line: 10, scope: !8) |
| !33 = !DILocation(line: 8, scope: !8) |
| !34 = !DILocation(line: 12, scope: !35) |
| !35 = distinct !DILexicalBlock(scope: !31, file: !9, line: 10) |
| !36 = !DILocation(line: 13, scope: !35) |
| !37 = !DILocation(line: 14, scope: !35) |
| !38 = !DILocation(line: 15, scope: !35) |
| !39 = !DILocation(line: 0, scope: !31) |
| !40 = !DILocation(line: 20, scope: !8) |
| !41 = !DILocation(line: 19, scope: !8) |