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' 59 target 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 63 define void @f() nounwind !dbg !0 { 64 entry: 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 70 while.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 77 while.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 84 while.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 91 while.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 98 declare i32 @g(i32, i32) 99 100 declare 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, 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: 1, file: !23, enums: !{}, retainedTypes: !{}, subprograms: !21, 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 !21 = !{!0} 124 !22 = !{!5} 125 !23 = !DIFile(filename: "simple.c", directory: "/home/rengol01/temp/tests/dwarf/relocation") 126 !24 = !{i32 1, !"Debug Info Version", i32 3} 127
