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 { 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 !12, i64 0, metadata !5), !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), !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 !16, i64 0, metadata !5), !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), !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) nounwind readnone 101 102 !llvm.dbg.cu = !{!2} 103 !llvm.module.flags = !{!24} 104 105 !0 = metadata !{i32 786478, metadata !23, metadata !1, metadata !"f", metadata !"f", metadata !"", i32 4, metadata !3, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void ()* @f, null, null, metadata !22, i32 4} ; [ DW_TAG_subprogram ] [line 4] [def] [f] 106 !1 = metadata !{i32 786473, metadata !23} ; [ DW_TAG_file_type ] 107 !2 = metadata !{i32 786449, metadata !23, i32 12, metadata !"clang version 3.0 (trunk)", i1 true, metadata !"", i32 0, metadata !4, metadata !4, metadata !21, null, null, null} ; [ DW_TAG_compile_unit ] 108 !3 = metadata !{i32 786453, metadata !23, metadata !1, metadata !"", i32 0, i64 0, i64 0, i32 0, i32 0, null, metadata !4, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 109 !4 = metadata !{null} 110 !5 = metadata !{i32 786688, metadata !6, metadata !"x", metadata !1, i32 5, metadata !7, i32 0, null} ; [ DW_TAG_auto_variable ] 111 !6 = metadata !{i32 786443, metadata !23, metadata !0, i32 4, i32 14, i32 0} ; [ DW_TAG_lexical_block ] 112 !7 = metadata !{i32 786468, null, metadata !2, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] 113 !8 = metadata !{i32 6, i32 3, metadata !6, null} 114 !12 = metadata !{i32 1} 115 !13 = metadata !{i32 7, i32 3, metadata !6, null} 116 !14 = metadata !{i32 8, i32 3, metadata !6, null} 117 !15 = metadata !{i32 9, i32 3, metadata !6, null} 118 !16 = metadata !{i32 2} 119 !17 = metadata !{i32 10, i32 3, metadata !6, null} 120 !18 = metadata !{i32 11, i32 3, metadata !6, null} 121 !19 = metadata !{i32 12, i32 3, metadata !6, null} 122 !20 = metadata !{i32 13, i32 1, metadata !6, null} 123 !21 = metadata !{metadata !0} 124 !22 = metadata !{metadata !5} 125 !23 = metadata !{metadata !"simple.c", metadata !"/home/rengol01/temp/tests/dwarf/relocation"} 126 !24 = metadata !{i32 1, metadata !"Debug Info Version", i32 1} 127