You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
37 lines
1.5 KiB
37 lines
1.5 KiB
; RUN: opt -mtriple=x86_64-- -S --dse %s -o - | FileCheck %s
|
|
; Ensure that we can mark a value as undefined when performing dead
|
|
; store elimination.
|
|
; Bugzilla #45080
|
|
|
|
@b = common dso_local local_unnamed_addr global i32 0, align 1
|
|
|
|
define dso_local i32 @main() local_unnamed_addr !dbg !7 {
|
|
%1 = alloca i32, align 4
|
|
%2 = load i32, i32* @b, align 1, !dbg !13
|
|
; CHECK: call void @llvm.dbg.value(metadata i32 undef
|
|
call void @llvm.dbg.value(metadata i32 %2, metadata !12, metadata !DIExpression()), !dbg !13
|
|
store i32 %2, i32* %1, align 4, !dbg !13
|
|
ret i32 0, !dbg !13
|
|
}
|
|
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata)
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4}
|
|
!llvm.ident = !{!6}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !2, nameTableKind: None)
|
|
!1 = !DIFile(filename: "dead-store-elimination-marks-undef.ll", directory: "/temp/bz45080")
|
|
!2 = !{}
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!6 = !{!"clang version 10.0.0"}
|
|
!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
|
|
!8 = !DISubroutineType(types: !9)
|
|
!9 = !{!10}
|
|
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
!11 = !{!12}
|
|
!12 = !DILocalVariable(name: "l_2864", scope: !7, file: !1, line: 4, type: !10)
|
|
!13 = !DILocation(line: 5, column: 12, scope: !7)
|
|
|