| ; RUN: opt -passes=deadargelim -S < %s | FileCheck %s |
| |
| ; Verify that the dbg.value intrinsics that use the dead argument and return |
| ; value are marked as poison to indicate that the values are optimized out. |
| |
| ; Reproducer for PR23260. |
| |
| ; CHECK-LABEL: define internal void @bar() |
| ; CHECK: call void @llvm.dbg.value(metadata i32 poison, metadata ![[LOCAL1:[0-9]+]] |
| ; CHECK: call void @sink() |
| |
| ; Function Attrs: alwaysinline nounwind uwtable |
| define internal i32 @bar(i32 %deadarg) #1 !dbg !10 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %deadarg, metadata !15, metadata !DIExpression()), !dbg !17 |
| call void @sink(), !dbg !17 |
| ret i32 123, !dbg !17 |
| } |
| |
| ; CHECK-LABEL: define void @foo() |
| ; CHECK: call void @bar() |
| ; CHECK: call void @llvm.dbg.value(metadata i32 poison, metadata ![[LOCAL2:[0-9]+]] |
| ; CHECK: call void @bar() |
| |
| ; Function Attrs: nounwind uwtable |
| define void @foo() #0 !dbg !6 { |
| entry: |
| %deadret = call i32 @bar(i32 0), !dbg !9 |
| call void @llvm.dbg.value(metadata i32 %deadret, metadata !16, metadata !DIExpression()), !dbg !9 |
| call i32 @bar(i32 1), !dbg !9 |
| ret void, !dbg !9 |
| } |
| |
| declare void @sink() local_unnamed_addr |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| attributes #0 = { nounwind uwtable } |
| attributes #1 = { alwaysinline nounwind uwtable } |
| attributes #2 = { nounwind readnone speculatable } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| !llvm.ident = !{!5} |
| |
| ; CHECK: ![[LOCAL1]] = !DILocalVariable(name: "local1" |
| ; CHECK: ![[LOCAL2]] = !DILocalVariable(name: "local2" |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "pr23260.c", directory: "/") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{!"clang version 8.0.0"} |
| !6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !7, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) |
| !7 = !DISubroutineType(types: !8) |
| !8 = !{null} |
| !9 = !DILocation(line: 4, column: 3, scope: !6) |
| !10 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 2, type: !11, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14) |
| !11 = !DISubroutineType(types: !12) |
| !12 = !{!13, !13} |
| !13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !14 = !{!15} |
| !15 = !DILocalVariable(name: "local1", arg: 1, scope: !10, file: !1, line: 2, type: !13) |
| !16 = !DILocalVariable(name: "local2", arg: 1, scope: !6, file: !1, line: 2, type: !13) |
| !17 = !DILocation(line: 2, column: 52, scope: !10) |