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Revert "Debug Info: Support fragmented variables in the MMI side table" 

This reverts commit r309034 because of a sanitizer issue.

llvm-svn: 309035
This commit is contained in:
Adrian Prantl 2017-07-25 21:50:45 +00:00
parent 3d1ab0cd1e
commit b6d5faf2ea
2 changed files with 1 additions and 57 deletions
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7
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -779,7 +779,6 @@ void DwarfDebug::ensureAbstractVariableIsCreatedIfScoped(DwarfCompileUnit &CU,
// Collect variable information from side table maintained by MF.
void DwarfDebug::collectVariableInfoFromMFTable(
DwarfCompileUnit &TheCU, DenseSet<InlinedVariable> &Processed) {
SmallDenseMap<const DILocalVariable *, DbgVariable *> MFVars;
for (const auto &VI : Asm->MF->getVariableDbgInfo()) {
if (!VI.Var)
continue;
@ -797,12 +796,8 @@ void DwarfDebug::collectVariableInfoFromMFTable(
ensureAbstractVariableIsCreatedIfScoped(TheCU, Var, Scope->getScopeNode());
auto RegVar = make_unique<DbgVariable>(Var.first, Var.second);
RegVar->initializeMMI(VI.Expr, VI.Slot);
if (DbgVariable *DbgVar = MFVars.lookup(VI.Var))
DbgVar->addMMIEntry(*RegVar);
else if (InfoHolder.addScopeVariable(Scope, RegVar.get())) {
MFVars.insert({VI.Var, RegVar.get()});
if (InfoHolder.addScopeVariable(Scope, RegVar.get()))
ConcreteVariables.push_back(std::move(RegVar));
}
}
}

51
llvm/test/DebugInfo/X86/fi-piece.ll
View File

@ -1,51 +0,0 @@
; RUN: llc %s -filetype=obj -o - | llvm-dwarfdump - | FileCheck %s
; Test that multi-DW_OP_piece expressions are emitted for FI variables.
;
; CHECK: .debug_info contents:
; CHECK: DW_TAG_variable
; CHECK: DW_AT_location [DW_FORM_exprloc] (<0x8> 91 7c 93 02 91 78 93 02 )
; fbreg -8, piece 0x00000002, fbreg -4, piece 0x00000002
; CHECK: DW_AT_name {{.*}}"a"
; ModuleID = '/tmp/t.c'
source_filename = "/tmp/t.c"
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.12.0"
; Function Attrs: noinline nounwind optnone ssp uwtable
define void @f() #0 !dbg !8 {
entry:
%a = alloca i16, align 4
%b = alloca i16, align 4
call void @llvm.dbg.declare(metadata i16* %a, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 16)), !dbg !14
store i16 1, i16* %a, align 4, !dbg !14
call void @llvm.dbg.declare(metadata i16* %b, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 16, 16)), !dbg !16
store i16 2, i16* %b, align 4, !dbg !16
ret void
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
attributes #0 = { noinline nounwind optnone ssp uwtable }
attributes #1 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "adrian", emissionKind: FullDebug)
!1 = !DIFile(filename: "/tmp/t.c", directory: "/")
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 4}
!6 = !{i32 7, !"PIC Level", i32 2}
!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, unit: !0)
!9 = !DISubroutineType(types: !10)
!10 = !{null}
!11 = !DILocalVariable(name: "a", scope: !8, file: !1, line: 2, type: !12)
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!13 = !DIExpression()
!14 = !DILocation(line: 2, column: 7, scope: !8)
!15 = !DILocalVariable(name: "b", scope: !8, file: !1, line: 3, type: !12)
!16 = !DILocation(line: 3, column: 7, scope: !8)