diff options
Diffstat (limited to 'llvm/test/DebugInfo/Sparc/entry-value-complex-reg-expr.ll')
| -rw-r--r-- | llvm/test/DebugInfo/Sparc/entry-value-complex-reg-expr.ll | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/Sparc/entry-value-complex-reg-expr.ll b/llvm/test/DebugInfo/Sparc/entry-value-complex-reg-expr.ll new file mode 100644 index 00000000000..07a3e9da1dd --- /dev/null +++ b/llvm/test/DebugInfo/Sparc/entry-value-complex-reg-expr.ll @@ -0,0 +1,79 @@ +; RUN: llc -debug-entry-values -filetype=asm -o - %s | FileCheck %s + +; Verify that the entry value covers both of the DW_OP_regx pieces. Previously +; the size operand of the entry value would be hardcoded to one. +; +; XXX: Is this really what should be emitted, or should we instead emit one +; entry value operation per DW_OP_regx? GDB can currently not understand +; entry values containing complex expressions like this. + +target datalayout = "E-m:e-i64:64-n32:64-S128" +target triple = "sparc64" + +; Based on the following C reproducer: +; +; volatile long double global; +; extern void clobber(); +; int foo(long double p) { +; global = p; +; clobber(); +; return 123; +; } + +; CHECK: .byte 243 ! DW_OP_GNU_entry_value +; CHECK-NEXT: .byte 8 ! 8 +; CHECK-NEXT: .byte 144 ! sub-register DW_OP_regx +; CHECK-NEXT: .byte 72 ! 72 +; CHECK-NEXT: .byte 147 ! DW_OP_piece +; CHECK-NEXT: .byte 8 ! 8 +; CHECK-NEXT: .byte 144 ! sub-register DW_OP_regx +; CHECK-NEXT: .byte 73 ! 73 +; CHECK-NEXT: .byte 147 ! DW_OP_piece +; CHECK-NEXT: .byte 8 ! 8 +; CHECK-NEXT: .byte 159 ! DW_OP_stack_value + +@global = common global fp128 0xL00000000000000000000000000000000, align 16, !dbg !0 + +; Function Attrs: nounwind +define signext i32 @foo(fp128 %p) #0 !dbg !12 { +entry: + call void @llvm.dbg.value(metadata fp128 %p, metadata !17, metadata !DIExpression()), !dbg !18 + store volatile fp128 %p, fp128* @global, align 16, !dbg !19 + tail call void @clobber(), !dbg !20 + ret i32 123, !dbg !21 +} + +declare void @clobber() + +; Function Attrs: nounwind readnone speculatable willreturn +declare void @llvm.dbg.value(metadata, metadata, metadata) #1 + +attributes #0 = { nounwind } +attributes #1 = { nounwind readnone speculatable willreturn } + +!llvm.dbg.cu = !{!2} +!llvm.module.flags = !{!8, !9, !10} +!llvm.ident = !{!11} + +!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) +!1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true) +!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) +!3 = !DIFile(filename: "entry-value-complex-reg-expr.c", directory: "/") +!4 = !{} +!5 = !{!0} +!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7) +!7 = !DIBasicType(name: "long double", size: 128, encoding: DW_ATE_float) +!8 = !{i32 2, !"Dwarf Version", i32 4} +!9 = !{i32 2, !"Debug Info Version", i32 3} +!10 = !{i32 1, !"wchar_size", i32 4} +!11 = !{!"clang version 10.0.0"} +!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) +!13 = !DISubroutineType(types: !14) +!14 = !{!15, !7} +!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) +!16 = !{!17} +!17 = !DILocalVariable(name: "p", arg: 1, scope: !12, file: !3, line: 3, type: !7, flags: DIFlagArgumentNotModified) +!18 = !DILocation(line: 0, scope: !12) +!19 = !DILocation(line: 4, scope: !12) +!20 = !DILocation(line: 5, scope: !12) +!21 = !DILocation(line: 6, scope: !12) |
