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1# RUN: llc %s --start-after=livedebugvalues -filetype=obj -o - \2# RUN: | llvm-dwarfdump - -name local* -regex \3# RUN: | FileCheck %s4#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 013 }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: fun48body: |49 bb.0.entry:50 ; NOTE: By design, all DBG_VALUE_LIST instructions describe stack_value51 ; 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 !1555 ; CHECK: DW_TAG_variable56 ; 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 !1561 ; CHECK: DW_TAG_variable62 ; 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 !1567 ; CHECK: DW_TAG_variable68 ; 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 !1573 ; CHECK: DW_TAG_variable74 ; 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 !1579 ; CHECK: DW_TAG_variable80 ; 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 !1585 ; CHECK: DW_TAG_variable86 ; 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 !1591 ; CHECK: DW_TAG_variable92 ; 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 !1597 ; CHECK-NOT: DW_AT_name ("localh")98 99 ; (9) Check that relational operators work100 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 !15101 ; CHECK: DW_TAG_variable102 ; 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 !15107...108