| |
| ; Check that when variables are allocated on the stack we generate debug locations |
| ; for the stack location directly instead of generating a register+offset indirection. |
| |
| ; RUN: llc -O2 -filetype=obj -disable-post-ra -mtriple=x86_64-unknown-linux-gnu < %s \ |
| ; RUN: | llvm-dwarfdump - | FileCheck %s |
| ; |
| ; int data = 17; |
| ; int sum = 0; |
| ; int zero = 0; |
| ; int *ptr; |
| ; |
| ; extern void foo(int i, int *p); |
| ; |
| ; int main() |
| ; { |
| ; int val; |
| ; val = data; |
| ; foo(1, &val); |
| ; foo(2, &data); |
| ; return zero; |
| ; } |
| ; |
| ; CHECK: .debug_info contents |
| ; CHECK: DW_TAG_subprogram |
| ; CHECK-NOT: NULL |
| ; CHECK: DW_TAG_variable |
| ; CHECK: DW_AT_location ({{.*}} |
| ; CHECK-NEXT: [{{0x.*}}, {{0x.*}}): DW_OP_reg0 RAX |
| ; |
| ; Note: This is a location, so we don't want an extra DW_OP_deref at the end. |
| ; LLDB gets the location right without it: |
| ; Variable: ... name = "val", type = "int", location = [rsp+4], decl = frame.c:10 |
| ; Adding the deref actually creates an invalid location: |
| ; ... [rsp+4] DW_OP_deref |
| ; |
| ; CHECK-NEXT: [{{0x.*}}, {{0x.*}}): DW_OP_breg7 RSP+4) |
| ; CHECK-NEXT: DW_AT_name ("val") |
| |
| ; ModuleID = 'frame.c' |
| source_filename = "frame.c" |
| |
| @data = dso_local global i32 17, align 4, !dbg !0 |
| @sum = dso_local local_unnamed_addr global i32 0, align 4, !dbg !6 |
| @zero = dso_local local_unnamed_addr global i32 0, align 4, !dbg !9 |
| @ptr = common dso_local local_unnamed_addr global i32* null, align 8, !dbg !11 |
| |
| define dso_local i32 @main() local_unnamed_addr !dbg !17 { |
| entry: |
| %val = alloca i32, align 4 |
| %0 = bitcast i32* %val to i8*, !dbg !22 |
| call void @llvm.lifetime.start(i64 4, i8* %0), !dbg !22 |
| %1 = load i32, i32* @data, align 4, !dbg !23, !tbaa !24 |
| tail call void @llvm.dbg.value(metadata i32 %1, metadata !21, metadata !28), !dbg !29 |
| store i32 %1, i32* %val, align 4, !dbg !30, !tbaa !24 |
| tail call void @llvm.dbg.value(metadata i32* %val, metadata !21, metadata !31), !dbg !29 |
| call void @foo(i32 1, i32* nonnull %val), !dbg !32 |
| call void @foo(i32 2, i32* nonnull @data), !dbg !33 |
| %2 = load i32, i32* @zero, align 4, !dbg !34, !tbaa !24 |
| call void @llvm.lifetime.end(i64 4, i8* %0), !dbg !35 |
| ret i32 %2, !dbg !36 |
| } |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start(i64, i8* nocapture) #0 |
| |
| declare void @foo(i32, i32*) local_unnamed_addr |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end(i64, i8* nocapture) #0 |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #1 |
| |
| attributes #0 = { argmemonly nounwind } |
| attributes #1 = { nounwind readnone } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!14, !15} |
| !llvm.ident = !{!16} |
| |
| !0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = !DIGlobalVariable(name: "data", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true) |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 3.9.0 (trunk 273961)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) |
| !3 = !DIFile(filename: "frame.c", directory: "/home/user/test") |
| !4 = !{} |
| !5 = !{!0, !6, !9, !11} |
| !6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) |
| !7 = !DIGlobalVariable(name: "sum", scope: !2, file: !3, line: 2, type: !8, isLocal: false, isDefinition: true) |
| !8 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) |
| !9 = distinct !DIGlobalVariableExpression(var: !10, expr: !DIExpression()) |
| !10 = !DIGlobalVariable(name: "zero", scope: !2, file: !3, line: 3, type: !8, isLocal: false, isDefinition: true) |
| !11 = distinct !DIGlobalVariableExpression(var: !12, expr: !DIExpression()) |
| !12 = !DIGlobalVariable(name: "ptr", scope: !2, file: !3, line: 4, type: !13, isLocal: false, isDefinition: true) |
| !13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !8, size: 64, align: 64) |
| !14 = !{i32 2, !"Dwarf Version", i32 4} |
| !15 = !{i32 2, !"Debug Info Version", i32 3} |
| !16 = !{!"clang version 3.9.0 (trunk 273961)"} |
| !17 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 8, type: !18, isLocal: false, isDefinition: true, scopeLine: 9, isOptimized: true, unit: !2, retainedNodes: !20) |
| !18 = !DISubroutineType(types: !19) |
| !19 = !{!8} |
| !20 = !{!21} |
| !21 = !DILocalVariable(name: "val", scope: !17, file: !3, line: 10, type: !8) |
| !22 = !DILocation(line: 10, column: 3, scope: !17) |
| !23 = !DILocation(line: 11, column: 9, scope: !17) |
| !24 = !{!25, !25, i64 0} |
| !25 = !{!"int", !26, i64 0} |
| !26 = !{!"omnipotent char", !27, i64 0} |
| !27 = !{!"Simple C/C++ TBAA"} |
| !28 = !DIExpression() |
| !29 = !DILocation(line: 10, column: 7, scope: !17) |
| !30 = !DILocation(line: 11, column: 7, scope: !17) |
| !31 = !DIExpression(DW_OP_deref) |
| !32 = !DILocation(line: 12, column: 3, scope: !17) |
| !33 = !DILocation(line: 13, column: 3, scope: !17) |
| !34 = !DILocation(line: 14, column: 10, scope: !17) |
| !35 = !DILocation(line: 15, column: 1, scope: !17) |
| !36 = !DILocation(line: 14, column: 3, scope: !17) |
| |