1# RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \ 2# RUN: | llvm-dwarfdump - -name local* -regex \ 3# RUN: | FileCheck %s 4# 5# Test that we produce correct DWARF from DBG_VALUE_LIST instructions. 6# Comments and test directives inline. 7 8--- | 9 target triple = "x86_64-unknown-linux-gnu" 10 define dso_local i32 @fun() local_unnamed_addr !dbg !7 { 11 entry: 12 ret i32 0 13 } 14 15 !llvm.dbg.cu = !{!0} 16 !llvm.module.flags = !{!3, !4, !5} 17 !llvm.ident = !{!6} 18 19 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 11.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) 20 !1 = !DIFile(filename: "example.c", directory: "/") 21 !2 = !{} 22 !3 = !{i32 7, !"Dwarf Version", i32 4} 23 !4 = !{i32 2, !"Debug Info Version", i32 3} 24 !5 = !{i32 1, !"wchar_size", i32 4} 25 !6 = !{!"clang version 11.0.0"} 26 !8 = !DISubroutineType(types: !9) 27 !9 = !{!10} 28 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 29 !11 = !{!12, !13, !25} 30 !22 = !DISubroutineType(types: !23) 31 !23 = !{!10, !10} 32 ; --- Important metadata --- 33 !7 = distinct !DISubprogram(name: "fun", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 34 !15 = !DILocation(line: 1, column: 1, scope: !7) 35 !12 = !DILocalVariable(name: "locala", scope: !7, file: !1, line: 1, type: !10) 36 !13 = !DILocalVariable(name: "localb", scope: !7, file: !1, line: 2, type: !10) 37 !25 = !DILocalVariable(name: "localc", scope: !7, file: !1, line: 3, type: !10) 38 !26 = !DILocalVariable(name: "locald", scope: !7, file: !1, line: 4, type: !10) 39 !27 = !DILocalVariable(name: "locale", scope: !7, file: !1, line: 5, type: !10) 40 !28 = !DILocalVariable(name: "localf", scope: !7, file: !1, line: 6, type: !10) 41 !29 = !DILocalVariable(name: "localg", scope: !7, file: !1, line: 6, type: !10) 42 !30 = !DILocalVariable(name: "localh", scope: !7, file: !1, line: 6, type: !10) 43 !31 = !DILocalVariable(name: "locali", scope: !7, file: !1, line: 6, type: !10) 44 45... 46--- 47name: fun 48body: | 49 bb.0.entry: 50 ; NOTE: By design, all DBG_VALUE_LIST instructions describe stack_value 51 ; locations, so they are always created with a DW_OP_stack_value op. 52 ; 53 ; (1) Check a single reg arg works. 54 DBG_VALUE_LIST !12, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value), $eax, debug-location !15 55 ; CHECK: DW_TAG_variable 56 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_stack_value) 57 ; CHECK-NEXT: DW_AT_name ("locala") 58 59 ; (2) Check multiple reg args work. 60 DBG_VALUE_LIST !13, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), $eax, $edi, debug-location !15 61 ; CHECK: DW_TAG_variable 62 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_plus, DW_OP_stack_value) 63 ; CHECK-NEXT: DW_AT_name ("localb") 64 65 ; (3) Check that multiple references to one reg arg works. 66 DBG_VALUE_LIST !25, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 0, DW_OP_minus, DW_OP_stack_value), $eax, debug-location !15 67 ; CHECK: DW_TAG_variable 68 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_minus, DW_OP_stack_value) 69 ; CHECK-NEXT: DW_AT_name ("localc") 70 71 ; (4) Check constant and reg args work together. 72 DBG_VALUE_LIST !26, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_mul, DW_OP_stack_value), $eax, 5, debug-location !15 73 ; CHECK: DW_TAG_variable 74 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_lit5, DW_OP_mul, DW_OP_stack_value) 75 ; CHECK-NEXT: DW_AT_name ("locald") 76 77 ; (5) Check that arg deref works. 78 DBG_VALUE_LIST !27, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_stack_value), $eax, debug-location !15 79 ; CHECK: DW_TAG_variable 80 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_deref, DW_OP_stack_value) 81 ; CHECK-NEXT: DW_AT_name ("locale") 82 83 ; (6) Check that fragments work. 84 DBG_VALUE_LIST !28, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_stack_value, DW_OP_LLVM_fragment, 0, 16), $eax, debug-location !15 85 ; CHECK: DW_TAG_variable 86 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_stack_value, DW_OP_piece 0x2) 87 ; CHECK-NEXT: DW_AT_name ("localf") 88 89 ; (7) Check that constant register offsets are correctly folded. 90 DBG_VALUE_LIST !29, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_plus_uconst, 5, DW_OP_LLVM_arg, 1, DW_OP_plus_uconst, 17, DW_OP_plus, DW_OP_stack_value), $eax, $edi, debug-location !15 91 ; CHECK: DW_TAG_variable 92 ; CHECK-NEXT: (DW_OP_breg0 RAX+5, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg5 RDI+17, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_plus, DW_OP_stack_value) 93 ; CHECK-NEXT: DW_AT_name ("localg") 94 95 ; (8) Check that a single $noreg location invalidates the entire entry. 96 DBG_VALUE_LIST !30, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), $eax, $noreg, debug-location !15 97 ; CHECK-NOT: DW_AT_name ("localh") 98 99 ; (9) Check that relational operators work 100 DBG_VALUE_LIST !31, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_eq, DW_OP_LLVM_arg, 0, DW_OP_ne, DW_OP_LLVM_arg, 1, DW_OP_gt, DW_OP_LLVM_arg, 0, DW_OP_lt, DW_OP_LLVM_arg, 1, DW_OP_le, DW_OP_stack_value), $eax, $edi, debug-location !15 101 ; CHECK: DW_TAG_variable 102 ; CHECK-NEXT: (DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_eq, DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_ne, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_gt, DW_OP_breg0 RAX+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_lt, DW_OP_breg5 RDI+0, DW_OP_constu 0xffffffff, DW_OP_and, DW_OP_le, DW_OP_stack_value) 103 ; CHECK-NEXT: DW_AT_name ("locali") 104 105 106 RET64 debug-location !15 107... 108