ef8992b9f0
This patch was reverted in 7c182663a857fc87 due to some failures observed on PCC based machines. Failures were due to Endianness issue and long double representation issues. Patch is revised to address Endianness issue. Furthermore, support for emission of `DW_OP_implicit_value` for `long double` has been removed (since it was unclean at the moment). Planning to handle this in a clean way soon! For more context, please refer to following review link. Reviewed By: aprantl Differential Revision: https://reviews.llvm.org/D83560
67 lines
2.8 KiB
LLVM
67 lines
2.8 KiB
LLVM
;; This test checks for emission of DW_OP_implicit_value operation
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;; for double type.
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; RUN: llc -debugger-tune=gdb -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_variable
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; CHECK-NEXT: DW_AT_location ({{.*}}
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; CHECK-NEXT: [{{.*}}): DW_OP_implicit_value 0x8 0x1f 0x85 0xeb 0x51 0xb8 0x1e 0x09 0x40)
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; CHECK-NEXT: DW_AT_name ("d")
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;; Generated from: clang -ggdb -O1
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;;int main() {
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;; double d = 3.14;
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;; printf("dummy\n");
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;; d *= d;
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;; return 0;
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;;}
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; ModuleID = 'implicit_value-double.c'
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source_filename = "implicit_value-double.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@str = private unnamed_addr constant [6 x i8] c"dummy\00", align 1
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; Function Attrs: nofree nounwind uwtable
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define dso_local i32 @main() local_unnamed_addr #0 !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata double 3.140000e+00, metadata !12, metadata !DIExpression()), !dbg !14
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%puts = call i32 @puts(i8* nonnull dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @str, i64 0, i64 0)), !dbg !15
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call void @llvm.dbg.value(metadata double undef, metadata !12, metadata !DIExpression()), !dbg !14
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ret i32 0, !dbg !16
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}
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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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; Function Attrs: nofree nounwind
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declare i32 @puts(i8* nocapture readonly) local_unnamed_addr #2
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attributes #0 = { nofree nounwind uwtable }
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attributes #1 = { nounwind readnone speculatable willreturn }
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attributes #2 = { nofree nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!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)
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!1 = !DIFile(filename: "implicit_value-double.c", directory: "/home/")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 11.0.0"}
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!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "d", scope: !7, file: !1, line: 2, type: !13)
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!13 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
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!14 = !DILocation(line: 0, scope: !7)
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!15 = !DILocation(line: 3, column: 2, scope: !7)
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!16 = !DILocation(line: 5, column: 2, scope: !7)
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