| # 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) |
| |
| CMP64mi32 $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 |
| |
| ... |