1 ; RUN: llc -debug-entry-values -filetype=asm -o - %s | FileCheck %s
3 ; Verify that the entry value covers both of the DW_OP_regx pieces. Previously
4 ; the size operand of the entry value would be hardcoded to one.
6 ; XXX: Is this really what should be emitted, or should we instead emit one
7 ; entry value operation per DW_OP_regx? GDB can currently not understand
8 ; entry values containing complex expressions like this.
10 target datalayout = "E-m:e-i64:64-n32:64-S128"
11 target triple = "sparc64"
13 ; Based on the following C reproducer:
15 ; volatile long double global;
16 ; extern void clobber();
17 ; int foo(long double p) {
23 ; CHECK: .byte 243 ! DW_OP_GNU_entry_value
24 ; CHECK-NEXT: .byte 8 ! 8
25 ; CHECK-NEXT: .byte 144 ! sub-register DW_OP_regx
26 ; CHECK-NEXT: .byte 72 ! 72
27 ; CHECK-NEXT: .byte 147 ! DW_OP_piece
28 ; CHECK-NEXT: .byte 8 ! 8
29 ; CHECK-NEXT: .byte 144 ! sub-register DW_OP_regx
30 ; CHECK-NEXT: .byte 73 ! 73
31 ; CHECK-NEXT: .byte 147 ! DW_OP_piece
32 ; CHECK-NEXT: .byte 8 ! 8
33 ; CHECK-NEXT: .byte 159 ! DW_OP_stack_value
35 @global = common global fp128 0xL00000000000000000000000000000000, align 16, !dbg !0
37 ; Function Attrs: nounwind
38 define signext i32 @foo(fp128 %p) #0 !dbg !12 {
40 call void @llvm.dbg.value(metadata fp128 %p, metadata !17, metadata !DIExpression()), !dbg !18
41 store volatile fp128 %p, fp128* @global, align 16, !dbg !19
42 tail call void @clobber(), !dbg !20
46 declare void @clobber()
48 ; Function Attrs: nounwind readnone speculatable willreturn
49 declare void @llvm.dbg.value(metadata, metadata, metadata) #1
51 attributes #0 = { nounwind }
52 attributes #1 = { nounwind readnone speculatable willreturn }
55 !llvm.module.flags = !{!8, !9, !10}
58 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
59 !1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
60 !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
61 !3 = !DIFile(filename: "entry-value-complex-reg-expr.c", directory: "/")
64 !6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7)
65 !7 = !DIBasicType(name: "long double", size: 128, encoding: DW_ATE_float)
66 !8 = !{i32 2, !"Dwarf Version", i32 4}
67 !9 = !{i32 2, !"Debug Info Version", i32 3}
68 !10 = !{i32 1, !"wchar_size", i32 4}
69 !11 = !{!"clang version 10.0.0"}
70 !12 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 3, type: !13, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !16)
71 !13 = !DISubroutineType(types: !14)
73 !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
75 !17 = !DILocalVariable(name: "p", arg: 1, scope: !12, file: !3, line: 3, type: !7, flags: DIFlagArgumentNotModified)
76 !18 = !DILocation(line: 0, scope: !12)
77 !19 = !DILocation(line: 4, scope: !12)
78 !20 = !DILocation(line: 5, scope: !12)
79 !21 = !DILocation(line: 6, scope: !12)