92 lines
3.7 KiB
LLVM
92 lines
3.7 KiB
LLVM
; RUN: llc -debug-entry-values -filetype=asm -o - %s | FileCheck %s
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; Verify that the size operands of the DW_OP_GNU_entry_value operations are
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; correct for the multi-byte DW_OP_regx expressions.
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; Based on the following C reproducer:
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;
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; extern void clobber();
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; double global;
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; int f(double a, double b) {
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; global = a + b;
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; clobber();
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; return 1;
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; }
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; This test checks the assembly output rather than the output from
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; llvm-dwarfdump, as the latter printed the DW_OP_regx D0 correctly, even
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; though the entry value's size operand did not fully cover that:
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; DW_OP_GNU_entry_value(DW_OP_regx D0), DW_OP_stack_value
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;
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; whereas readelf interpreted it as an DW_OP_GNU_entry_value covering one byte,
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; resulting in garbage data:
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;
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; DW_OP_GNU_entry_value: (DW_OP_regx: 0 (r0)); DW_OP_breg16 (r16): 2; DW_OP_stack_value
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; CHECK: .byte 243 @ DW_OP_GNU_entry_value
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; CHECK-NEXT: .byte 3 @ 3
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; CHECK-NEXT: .byte 144 @ DW_OP_regx
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; CHECK-NEXT: .byte 128 @ 256
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; CHECK-NEXT: .byte 2 @
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; CHECK-NEXT: .byte 159 @ DW_OP_stack_value
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; CHECK: .byte 243 @ DW_OP_GNU_entry_value
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; CHECK-NEXT: .byte 3 @ 3
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; CHECK-NEXT: .byte 144 @ DW_OP_regx
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; CHECK-NEXT: .byte 129 @ 257
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; CHECK-NEXT: .byte 2 @
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; CHECK-NEXT: .byte 159 @ DW_OP_stack_value
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv7-unknown-unknown"
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@global = common global double 0.000000e+00, align 8, !dbg !0
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; Function Attrs: nounwind
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define arm_aapcs_vfpcc i32 @f(double %a, double %b) #0 !dbg !12 {
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entry:
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call void @llvm.dbg.value(metadata double %a, metadata !17, metadata !DIExpression()), !dbg !19
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call void @llvm.dbg.value(metadata double %b, metadata !18, metadata !DIExpression()), !dbg !19
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%add = fadd double %a, %b, !dbg !20
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store double %add, double* @global, align 8, !dbg !20
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tail call arm_aapcs_vfpcc void @clobber(), !dbg !21
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ret i32 1, !dbg !22
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}
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declare arm_aapcs_vfpcc void @clobber()
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8, !9, !10}
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!llvm.ident = !{!11}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 4, type: !6, isLocal: false, isDefinition: true)
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!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)
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!3 = !DIFile(filename: "entry-value-multi-byte-expr.c", directory: "/")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"wchar_size", i32 4}
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!10 = !{i32 1, !"min_enum_size", i32 4}
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!11 = !{!"clang version 10.0.0"}
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!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)
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!13 = !DISubroutineType(types: !14)
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!14 = !{!15, !6, !6}
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!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!16 = !{!17, !18}
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!17 = !DILocalVariable(name: "a", arg: 1, scope: !12, file: !3, line: 6, type: !6)
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!18 = !DILocalVariable(name: "b", arg: 2, scope: !12, file: !3, line: 6, type: !6)
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!19 = !DILocation(line: 0, scope: !12)
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!20 = !DILocation(line: 7, scope: !12)
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!21 = !DILocation(line: 8, scope: !12)
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!22 = !DILocation(line: 9, scope: !12)
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