# RUN: llc -start-after=livedebugvalues --filetype=obj %s -o - \
# RUN: | llvm-dwarfdump -v --name local* --regex - | FileCheck %s
#
# Generated with opt -sroa, llc -stop-after=livedebugvalues, with some metadata
# removed by hand:
# long a, b, c;
# long funone() {
# unsigned localone;
# if (c)
# return b;
# // Location should start here.
# localone = 0;
# return a;
# }
#
# short funtwo() {
# union {
# char b[2];
# short c;
# } localtwo;
# {
# // Location should start here.
# memcpy(localtwo.b, 0, 2);
# }
# return localtwo.c;
# }
#
# Check that the local variables each have a location range which reflects the
# fact that they're both unavailable at the start of the functions.
#
# CHECK: DW_TAG_variable [
# CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset]
# CHECK-NEXT: [0x{{[0-9a-z]+}}, 0x{{[0-9a-z]+}})
# CHECK-NEXT: DW_AT_name {{.*}} = "localone"
#
# CHECK: DW_TAG_variable [
# CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset]
# CHECK-NEXT: [0x{{[0-9a-z]+}}, 0x{{[0-9a-z]+}})
# CHECK-NEXT: DW_AT_name {{.*}} = "localtwo"
--- |
target triple = "x86_64-unknown-linux-gnu"
@c = dso_local global i64 0, align 8, !dbg !0
@b = dso_local global i64 0, align 8, !dbg !9
@a = dso_local global i64 0, align 8, !dbg !6
define dso_local i64 @funone() !dbg !15 {
entry:
%0 = load i64, i64* @c, align 8, !dbg !21
%tobool = icmp ne i64 %0, 0, !dbg !21
br i1 %tobool, label %if.then, label %if.end, !dbg !27
if.then: ; preds = %entry
%1 = load i64, i64* @b, align 8, !dbg !21
br label %cleanup, !dbg !21
if.end: ; preds = %entry
call void @llvm.dbg.value(metadata i32 0, metadata !19, metadata !DIExpression()), !dbg !27
%2 = load i64, i64* @a, align 8, !dbg !27
br label %cleanup, !dbg !27
cleanup: ; preds = %if.end, %if.then
%retval.0 = phi i64 [ %1, %if.then ], [ %2, %if.end ], !dbg !27
ret i64 %retval.0, !dbg !27
}
define dso_local signext i16 @funtwo() !dbg !34 {
entry:
%localtwo.sroa.0.0.copyload = load i16, i16* null, align 1, !dbg !48
call void @llvm.dbg.value(metadata i16 %localtwo.sroa.0.0.copyload, metadata !39, metadata !DIExpression()), !dbg !51
ret i16 %localtwo.sroa.0.0.copyload, !dbg !51
}
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!11, !12, !13}
!llvm.ident = !{!14}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "test.c", directory: "/")
!4 = !{}
!5 = !{!6, !9, !0}
!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
!7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
!8 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
!9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression())
!10 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true)
!11 = !{i32 7, !"Dwarf Version", i32 4}
!12 = !{i32 2, !"Debug Info Version", i32 3}
!13 = !{i32 1, !"wchar_size", i32 4}
!14 = !{!"clang version 11.0.0"}
!15 = distinct !DISubprogram(name: "funone", scope: !3, file: !3, line: 3, type: !16, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !18)
!16 = !DISubroutineType(types: !17)
!17 = !{!8}
!18 = !{!19}
!19 = !DILocalVariable(name: "localone", scope: !15, file: !3, line: 4, type: !20)
!20 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!21 = !DILocation(line: 5, column: 7, scope: !22)
!22 = distinct !DILexicalBlock(scope: !15, file: !3, line: 5, column: 7)
!27 = !DILocation(line: 5, column: 7, scope: !15)
!34 = distinct !DISubprogram(name: "funtwo", scope: !3, file: !3, line: 13, type: !35, scopeLine: 13, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !38)
!35 = !DISubroutineType(types: !36)
!36 = !{!37}
!37 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
!38 = !{!39}
!39 = !DILocalVariable(name: "localtwo", scope: !34, file: !3, line: 17, type: !40)
!40 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !34, file: !3, line: 14, size: 16, elements: !41)
!41 = !{!42, !47}
!42 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !40, file: !3, line: 15, baseType: !43, size: 16)
!43 = !DICompositeType(tag: DW_TAG_array_type, baseType: !44, size: 16, elements: !45)
!44 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
!45 = !{!46}
!46 = !DISubrange(count: 2)
!47 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !40, file: !3, line: 16, baseType: !37, size: 16)
!48 = !DILocation(line: 20, column: 5, scope: !49)
!49 = distinct !DILexicalBlock(scope: !34, file: !3, line: 18, column: 3)
!51 = !DILocation(line: 22, column: 3, scope: !34)
...
---
name: funone
body: |
bb.0.entry:
successors: %bb.1(0x50000000), %bb.2(0x30000000)
CMP64mi8 $rip, 1, $noreg, @c, $noreg, 0, implicit-def $eflags, debug-location !21 :: (dereferenceable load (s64) from @c)
JCC_1 %bb.2, 4, implicit killed $eflags, debug-location !27
bb.1.if.then:
renamable $rax = MOV64rm $rip, 1, $noreg, @b, $noreg, debug-location !21 :: (dereferenceable load (s64) from @b)
RET64 $rax, debug-location !27
bb.2.if.end:
DBG_VALUE 0, $noreg, !19, !DIExpression(), debug-location !27
renamable $rax = MOV64rm $rip, 1, $noreg, @a, $noreg, debug-location !27 :: (dereferenceable load (s64) from @a)
RET64 $rax, debug-location !27
...
---
name: funtwo
body: |
bb.0.entry:
$eax = MOVZX32rm16 $noreg, 1, $noreg, 0, $noreg, debug-location !48 :: (load (s16) from `i16* null`, align 1)
DBG_VALUE $ax, $noreg, !39, !DIExpression(), debug-location !51
RET64 $ax, debug-location !51
...