diff options
Diffstat (limited to 'llvm/test/DebugInfo/ARM')
| -rw-r--r-- | llvm/test/DebugInfo/ARM/entry-value-multi-byte-expr.ll | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/llvm/test/DebugInfo/ARM/entry-value-multi-byte-expr.ll b/llvm/test/DebugInfo/ARM/entry-value-multi-byte-expr.ll new file mode 100644 index 00000000000..6c482754cda --- /dev/null +++ b/llvm/test/DebugInfo/ARM/entry-value-multi-byte-expr.ll @@ -0,0 +1,91 @@ +; RUN: llc -debug-entry-values -filetype=asm -o - %s | FileCheck %s + +; Verify that the size operands of the DW_OP_GNU_entry_value operations are +; correct for the multi-byte DW_OP_regx expressions. + +; Based on the following C reproducer: +; +; extern void clobber(); +; double global; +; int f(double a, double b) { +; global = a + b; +; clobber(); +; return 1; +; } + +; This test checks the assembly output rather than the output from +; llvm-dwarfdump, as the latter printed the DW_OP_regx D0 correctly, even +; though the entry value's size operand did not fully cover that: + +; DW_OP_GNU_entry_value(DW_OP_regx D0), DW_OP_stack_value +; +; whereas readelf interpreted it as an DW_OP_GNU_entry_value covering one byte, +; resulting in garbage data: +; +; DW_OP_GNU_entry_value: (DW_OP_regx: 0 (r0)); DW_OP_breg16 (r16): 2; DW_OP_stack_value + +; CHECK: .byte 243 @ DW_OP_GNU_entry_value +; CHECK-NEXT: .byte 3 @ 3 +; CHECK-NEXT: .byte 144 @ DW_OP_regx +; CHECK-NEXT: .byte 128 @ 256 +; CHECK-NEXT: .byte 2 @ +; CHECK-NEXT: .byte 159 @ DW_OP_stack_value + +; CHECK: .byte 243 @ DW_OP_GNU_entry_value +; CHECK-NEXT: .byte 3 @ 3 +; CHECK-NEXT: .byte 144 @ DW_OP_regx +; CHECK-NEXT: .byte 129 @ 257 +; CHECK-NEXT: .byte 2 @ +; CHECK-NEXT: .byte 159 @ DW_OP_stack_value + +target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64" +target triple = "armv7-unknown-unknown" + +@global = common global double 0.000000e+00, align 8, !dbg !0 + +; Function Attrs: nounwind +define arm_aapcs_vfpcc i32 @f(double %a, double %b) #0 !dbg !12 { +entry: + call void @llvm.dbg.value(metadata double %a, metadata !17, metadata !DIExpression()), !dbg !19 + call void @llvm.dbg.value(metadata double %b, metadata !18, metadata !DIExpression()), !dbg !19 + %add = fadd double %a, %b, !dbg !20 + store double %add, double* @global, align 8, !dbg !20 + tail call arm_aapcs_vfpcc void @clobber(), !dbg !21 + ret i32 1, !dbg !22 +} + +declare arm_aapcs_vfpcc 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 = !{!7, !8, !9, !10} +!llvm.ident = !{!11} + +!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) +!1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 4, 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-multi-byte-expr.c", directory: "/") +!4 = !{} +!5 = !{!0} +!6 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float) +!7 = !{i32 2, !"Dwarf Version", i32 4} +!8 = !{i32 2, !"Debug Info Version", i32 3} +!9 = !{i32 1, !"wchar_size", i32 4} +!10 = !{i32 1, !"min_enum_size", i32 4} +!11 = !{!"clang version 10.0.0"} +!12 = distinct !DISubprogram(name: "f", scope: !3, file: !3, line: 6, type: !13, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !16) +!13 = !DISubroutineType(types: !14) +!14 = !{!15, !6, !6} +!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) +!16 = !{!17, !18} +!17 = !DILocalVariable(name: "a", arg: 1, scope: !12, file: !3, line: 6, type: !6, flags: DIFlagArgumentNotModified) +!18 = !DILocalVariable(name: "b", arg: 2, scope: !12, file: !3, line: 6, type: !6, flags: DIFlagArgumentNotModified) +!19 = !DILocation(line: 0, scope: !12) +!20 = !DILocation(line: 7, scope: !12) +!21 = !DILocation(line: 8, scope: !12) +!22 = !DILocation(line: 9, scope: !12) |
