1; RUN: llc -O1 -filetype=obj -mtriple=x86_64-apple-darwin < %s > %t 2; RUN: llvm-dwarfdump %t | FileCheck %s 3; RUN: llvm-objdump -r %t | FileCheck -check-prefix=DARWIN %s 4; RUN: llc -O1 -filetype=obj -mtriple=x86_64-pc-linux-gnu < %s > %t 5; RUN: llvm-dwarfdump %t | FileCheck %s 6; RUN: llvm-objdump -r %t | FileCheck -check-prefix=LINUX %s 7 8; PR9493 9; Adapted from the original test case in r127757. 10; We use 'llc -O1' to induce variable 'x' to live in different locations. 11; We don't actually care where 'x' lives, or what exact optimizations get 12; used, as long as 'x' moves around we're fine. 13 14; // The variable 'x' lives in different locations, so it needs an entry in 15; // the .debug_loc table section, referenced by DW_AT_location. 16; // This ref is not relocatable on Darwin, and is relocatable elsewhere. 17; extern int g(int, int); 18; extern int a; 19; 20; void f(void) { 21; int x; 22; a = g(0, 0); 23; x = 1; 24; while (x & 1) { x *= a; } 25; a = g(x, 0); 26; x = 2; 27; while (x & 2) { x *= a; } 28; a = g(0, x); 29; } 30 31; // The 'x' variable and its symbol reference location 32; CHECK: .debug_info contents: 33; CHECK: DW_TAG_variable 34; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x00000000) 35; CHECK-NEXT: DW_AT_name {{.*}} "x" 36; CHECK-NEXT: DW_AT_decl_file 37; CHECK-NEXT: DW_AT_decl_line 38; CHECK-NEXT: DW_AT_type 39 40; Check that the location contains only 4 ranges - this verifies that the 4th 41; and 5th ranges were successfully merged into a single range. 42; CHECK: .debug_loc contents: 43; CHECK: 0x00000000: 44; CHECK: Beginning address offset: 45; CHECK: Beginning address offset: 46; CHECK: Beginning address offset: 47; CHECK: Beginning address offset: 48; CHECK-NOT: Beginning address offset: 49 50; Check that we have no relocations in Darwin's output. 51; DARWIN-NOT: X86_64_RELOC{{.*}} __debug_loc 52 53; Check we have a relocation for the debug_loc entry in Linux output. 54; LINUX: RELOCATION RECORDS FOR [.rela.debug_info] 55; LINUX-NOT: RELOCATION RECORDS 56; LINUX: R_X86_64{{.*}} .debug_loc+0 57 58; ModuleID = 'simple.c' 59target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32" 60 61@a = external global i32 62 63define void @f() nounwind !dbg !0 { 64entry: 65 %call = tail call i32 @g(i32 0, i32 0) nounwind, !dbg !8 66 store i32 %call, i32* @a, align 4, !dbg !8 67 tail call void @llvm.dbg.value(metadata i32 1, i64 0, metadata !5, metadata !DIExpression()), !dbg !13 68 br label %while.body 69 70while.body: ; preds = %entry, %while.body 71 %x.017 = phi i32 [ 1, %entry ], [ %mul, %while.body ] 72 %mul = mul nsw i32 %call, %x.017, !dbg !14 73 %and = and i32 %mul, 1, !dbg !14 74 %tobool = icmp eq i32 %and, 0, !dbg !14 75 br i1 %tobool, label %while.end, label %while.body, !dbg !14 76 77while.end: ; preds = %while.body 78 tail call void @llvm.dbg.value(metadata i32 %mul, i64 0, metadata !5, metadata !DIExpression()), !dbg !14 79 %call4 = tail call i32 @g(i32 %mul, i32 0) nounwind, !dbg !15 80 store i32 %call4, i32* @a, align 4, !dbg !15 81 tail call void @llvm.dbg.value(metadata i32 2, i64 0, metadata !5, metadata !DIExpression()), !dbg !17 82 br label %while.body9 83 84while.body9: ; preds = %while.end, %while.body9 85 %x.116 = phi i32 [ 2, %while.end ], [ %mul12, %while.body9 ] 86 %mul12 = mul nsw i32 %call4, %x.116, !dbg !18 87 %and7 = and i32 %mul12, 2, !dbg !18 88 %tobool8 = icmp eq i32 %and7, 0, !dbg !18 89 br i1 %tobool8, label %while.end13, label %while.body9, !dbg !18 90 91while.end13: ; preds = %while.body9 92 tail call void @llvm.dbg.value(metadata i32 %mul12, i64 0, metadata !5, metadata !DIExpression()), !dbg !18 93 %call15 = tail call i32 @g(i32 0, i32 %mul12) nounwind, !dbg !19 94 store i32 %call15, i32* @a, align 4, !dbg !19 95 ret void, !dbg !20 96} 97 98declare i32 @g(i32, i32) 99 100declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone 101 102!llvm.dbg.cu = !{!2} 103!llvm.module.flags = !{!24} 104 105!0 = distinct !DISubprogram(name: "f", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !2, scopeLine: 4, file: !23, scope: !1, type: !3, variables: !22) 106!1 = !DIFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation") 107!2 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.0 (trunk)", isOptimized: true, emissionKind: FullDebug, file: !23, enums: !{}, retainedTypes: !{}, imports: null) 108!3 = !DISubroutineType(types: !4) 109!4 = !{null} 110!5 = !DILocalVariable(name: "x", line: 5, scope: !6, file: !1, type: !7) 111!6 = distinct !DILexicalBlock(line: 4, column: 14, file: !23, scope: !0) 112!7 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 113!8 = !DILocation(line: 6, column: 3, scope: !6) 114!12 = !{i32 1} 115!13 = !DILocation(line: 7, column: 3, scope: !6) 116!14 = !DILocation(line: 8, column: 3, scope: !6) 117!15 = !DILocation(line: 9, column: 3, scope: !6) 118!16 = !{i32 2} 119!17 = !DILocation(line: 10, column: 3, scope: !6) 120!18 = !DILocation(line: 11, column: 3, scope: !6) 121!19 = !DILocation(line: 12, column: 3, scope: !6) 122!20 = !DILocation(line: 13, column: 1, scope: !6) 123!22 = !{!5} 124!23 = !DIFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation") 125!24 = !{i32 1, !"Debug Info Version", i32 3} 126