| ; RUN: opt -passes=instcombine -S %s -o - | FileCheck %s |
| |
| ; In pr40648 one of two dbg.values used to describe the variable bumble was |
| ; being dropped by instcombine. Test that both dbg.values survive instcombine. |
| |
| ; $ clang -O0 -Xclang -disable-O0-optnone -g bees.c -emit-llvm -S -o - \ |
| ; | opt -opt-bisect-limit=10 -O2 -o - |
| ; $ cat bees.c |
| ; struct bees { |
| ; int a; |
| ; int b; |
| ; } |
| |
| ; int global = 0; |
| |
| ; struct bees foo(struct bees bumble) |
| ; { |
| ; global = 1; |
| ; int temp = bumble.a + bumble.b; |
| ; return bumble; |
| ; } |
| |
| ; CHECK: define dso_local i64 @foo |
| ; CHECK: @llvm.dbg.value(metadata i64 {{.*}}, metadata ![[BEE:[0-9]+]], metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), |
| ; CHECK: @llvm.dbg.value(metadata i64 {{.*}}, metadata ![[BEE]], metadata !DIExpression({{.*}}, DW_OP_LLVM_fragment, 32, 32)), |
| |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-unknown" |
| |
| @global = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0 |
| |
| define dso_local i64 @foo(i64 %bumble.coerce) local_unnamed_addr !dbg !11 { |
| entry: |
| %bumble.sroa.0.0.extract.trunc = trunc i64 %bumble.coerce to i32 |
| call void @llvm.dbg.value(metadata i32 %bumble.sroa.0.0.extract.trunc, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !19 |
| %bumble.sroa.3.0.extract.shift = lshr i64 %bumble.coerce, 32 |
| %bumble.sroa.3.0.extract.trunc = trunc i64 %bumble.sroa.3.0.extract.shift to i32 |
| call void @llvm.dbg.value(metadata i32 %bumble.sroa.3.0.extract.trunc, metadata !18, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !19 |
| store i32 1, ptr @global, align 4, !dbg !20 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !21, metadata !DIExpression()), !dbg !19 |
| %retval.sroa.2.0.insert.ext = zext i32 %bumble.sroa.3.0.extract.trunc to i64, !dbg !22 |
| %retval.sroa.2.0.insert.shift = shl i64 %retval.sroa.2.0.insert.ext, 32, !dbg !22 |
| %retval.sroa.0.0.insert.ext = zext i32 %bumble.sroa.0.0.extract.trunc to i64, !dbg !22 |
| %retval.sroa.0.0.insert.insert = or i64 %retval.sroa.2.0.insert.shift, %retval.sroa.0.0.insert.ext, !dbg !22 |
| ret i64 %retval.sroa.0.0.insert.insert, !dbg !22 |
| } |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!7, !8, !9} |
| !llvm.ident = !{!10} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 6, type: !6, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None) |
| !3 = !DIFile(filename: "bees.c", directory: "/") |
| !4 = !{} |
| !5 = !{!0} |
| !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !7 = !{i32 2, !"Dwarf Version", i32 4} |
| !8 = !{i32 2, !"Debug Info Version", i32 3} |
| !9 = !{i32 1, !"wchar_size", i32 4} |
| !10 = !{!"clang version 10.0.0"} |
| !11 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 8, type: !12, scopeLine: 9, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !4) |
| !12 = !DISubroutineType(types: !13) |
| !13 = !{!14, !14} |
| !14 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "bees", file: !3, line: 1, size: 64, elements: !15) |
| !15 = !{!16, !17} |
| !16 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !14, file: !3, line: 2, baseType: !6, size: 32) |
| !17 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !14, file: !3, line: 3, baseType: !6, size: 32, offset: 32) |
| !18 = !DILocalVariable(name: "bumble", arg: 1, scope: !11, file: !3, line: 8, type: !14) |
| !19 = !DILocation(line: 0, scope: !11) |
| !20 = !DILocation(line: 10, column: 10, scope: !11) |
| !21 = !DILocalVariable(name: "temp", scope: !11, file: !3, line: 11, type: !6) |
| !22 = !DILocation(line: 12, column: 3, scope: !11) |