r268055 - Recommitted r264281 "Supporting all entities declared in lexical scope in LLVM debug info."

Aboud, Amjad via cfe-commits cfe-commits at lists.llvm.org
Fri Apr 29 10:27:27 PDT 2016


Sorry for that, I broke a LIT test that I added few days ago.
The LIT test need to be fixed and I already fixed it in r268063.

Let's wait till r268063 run bots and see that everything will pass.

Thanks,
Amjad
From: peter_cooper at apple.com [mailto:peter_cooper at apple.com]
Sent: Friday, April 29, 2016 19:53
To: Aboud, Amjad <amjad.aboud at intel.com>
Cc: cfe-commits at lists.llvm.org
Subject: Re: r268055 - Recommitted r264281 "Supporting all entities declared in lexical scope in LLVM debug info."

Hi Amjad

Either this change, or r268054, appears to have broken the bots.  Can you please take a look?

The error at: http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_check/22409/consoleFull#8333002949ba4694-19c4-4d7e-bec5-911270d8a58c

Thanks,
Pete
On Apr 29, 2016, at 9:08 AM, Amjad Aboud via cfe-commits <cfe-commits at lists.llvm.org<mailto:cfe-commits at lists.llvm.org>> wrote:

Author: aaboud
Date: Fri Apr 29 11:08:08 2016
New Revision: 268055

URL: http://llvm.org/viewvc/llvm-project?rev=268055&view=rev
Log:
Recommitted r264281 "Supporting all entities declared in lexical scope in LLVM debug info."
After fixing PR26942 in r267004.

Added:
   cfe/trunk/test/CodeGenCXX/debug-info-lb.cpp
Modified:
   cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
   cfe/trunk/lib/CodeGen/CGDebugInfo.h
   cfe/trunk/lib/CodeGen/CGDecl.cpp
   cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp

Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=268055&r1=268054&r2=268055&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Fri Apr 29 11:08:08 2016
@@ -814,15 +814,18 @@ llvm::DIType *CGDebugInfo::CreateType(co

llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty,
                                      llvm::DIFile *Unit) {
+  TypedefNameDecl *TD = Ty->getDecl();
  // We don't set size information, but do specify where the typedef was
  // declared.
-  SourceLocation Loc = Ty->getDecl()->getLocation();
+  SourceLocation Loc = TD->getLocation();
+
+  llvm::DIScope *TDContext = getDeclarationLexicalScope(*TD, QualType(Ty, 0));

  // Typedefs are derived from some other type.
  return DBuilder.createTypedef(
      getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
      Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
-      getDeclContextDescriptor(Ty->getDecl()));
+      TDContext);
}

llvm::DIType *CGDebugInfo::CreateType(const FunctionType *Ty,
@@ -1457,6 +1460,23 @@ llvm::DIType *CGDebugInfo::getOrCreateSt
  return T;
}

+void CGDebugInfo::recordDeclarationLexicalScope(const Decl &D) {
+  assert(LexicalBlockMap.find(&D) == LexicalBlockMap.end() &&
+         "D is already mapped to lexical block scope");
+  if (!LexicalBlockStack.empty())
+    LexicalBlockMap[&D] = LexicalBlockStack.back();
+}
+
+llvm::DIScope *CGDebugInfo::getDeclarationLexicalScope(const Decl &D,
+                                                       QualType Ty) {
+  auto I = LexicalBlockMap.find(&D);
+  if (I != LexicalBlockMap.end()) {
+    RetainedTypes.push_back(Ty.getAsOpaquePtr());
+    return I->second;
+  }
+  return getDeclContextDescriptor(cast<Decl>(&D));
+}
+
void CGDebugInfo::completeType(const EnumDecl *ED) {
  if (DebugKind <= codegenoptions::DebugLineTablesOnly)
    return;
@@ -2060,7 +2080,7 @@ llvm::DIType *CGDebugInfo::CreateEnumTyp
    // entered into the ReplaceMap: finalize() will replace the first
    // FwdDecl with the second and then replace the second with
    // complete type.
-    llvm::DIScope *EDContext = getDeclContextDescriptor(ED);
+    llvm::DIScope *EDContext = getDeclarationLexicalScope(*ED, QualType(Ty, 0));
    llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
    llvm::TempDIScope TmpContext(DBuilder.createReplaceableCompositeType(
        llvm::dwarf::DW_TAG_enumeration_type, "", TheCU, DefUnit, 0));
@@ -2104,7 +2124,7 @@ llvm::DIType *CGDebugInfo::CreateTypeDef

  llvm::DIFile *DefUnit = getOrCreateFile(ED->getLocation());
  unsigned Line = getLineNumber(ED->getLocation());
-  llvm::DIScope *EnumContext = getDeclContextDescriptor(ED);
+  llvm::DIScope *EnumContext = getDeclarationLexicalScope(*ED, QualType(Ty, 0));
  llvm::DIType *ClassTy =
      ED->isFixed() ? getOrCreateType(ED->getIntegerType(), DefUnit) : nullptr;
  return DBuilder.createEnumerationType(EnumContext, ED->getName(), DefUnit,
@@ -2365,7 +2385,7 @@ llvm::DICompositeType *CGDebugInfo::Crea
  unsigned Line = getLineNumber(RD->getLocation());
  StringRef RDName = getClassName(RD);

-  llvm::DIScope *RDContext = getDeclContextDescriptor(RD);
+  llvm::DIScope *RDContext = getDeclarationLexicalScope(*RD, QualType(Ty, 0));

  // If we ended up creating the type during the context chain construction,
  // just return that.
@@ -2536,8 +2556,15 @@ void CGDebugInfo::collectVarDeclProps(co
  if (DC->isRecord())
    DC = CGM.getContext().getTranslationUnitDecl();

- llvm::DIScope *Mod = getParentModuleOrNull(VD);
- VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU);
+  if (VD->isStaticLocal()) {
+    // Get context for static locals (that are technically globals) the same way
+    // we do for "local" locals -- by using current lexical block.
+    assert(!LexicalBlockStack.empty() && "Region stack mismatch, stack empty!");
+    VDContext = LexicalBlockStack.back();
+  } else {
+    llvm::DIScope *Mod = getParentModuleOrNull(VD);
+    VDContext = getContextDescriptor(cast<Decl>(DC), Mod ? Mod : TheCU);
+  }
}

llvm::DISubprogram *

Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.h?rev=268055&r1=268054&r2=268055&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.h (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.h Fri Apr 29 11:08:08 2016
@@ -107,6 +107,11 @@ class CGDebugInfo {

  /// Keep track of our current nested lexical block.
  std::vector<llvm::TypedTrackingMDRef<llvm::DIScope>> LexicalBlockStack;
+
+  /// Map of AST declaration to its lexical block scope.
+  llvm::DenseMap<const Decl *, llvm::TypedTrackingMDRef<llvm::DIScope>>
+      LexicalBlockMap;
+
  llvm::DenseMap<const Decl *, llvm::TrackingMDRef> RegionMap;
  /// Keep track of LexicalBlockStack counter at the beginning of a
  /// function. This is used to pop unbalanced regions at the end of a
@@ -369,6 +374,12 @@ public:
  /// Emit an Objective-C interface type standalone debug info.
  llvm::DIType *getOrCreateInterfaceType(QualType Ty, SourceLocation Loc);

+  /// Map AST declaration to its lexical block scope if available.
+  void recordDeclarationLexicalScope(const Decl &D);
+
+  /// Get lexical scope of AST declaration.
+  llvm::DIScope *getDeclarationLexicalScope(const Decl &D, QualType Ty);
+
  /// Emit standalone debug info for a type.
  llvm::DIType *getOrCreateStandaloneType(QualType Ty, SourceLocation Loc);


Modified: cfe/trunk/lib/CodeGen/CGDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDecl.cpp?rev=268055&r1=268054&r2=268055&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDecl.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDecl.cpp Fri Apr 29 11:08:08 2016
@@ -87,11 +87,7 @@ void CodeGenFunction::EmitDecl(const Dec
  case Decl::UsingShadow:
  case Decl::ObjCTypeParam:
    llvm_unreachable("Declaration should not be in declstmts!");
-  case Decl::Function:  // void X();
-  case Decl::Record:    // struct/union/class X;
-  case Decl::Enum:      // enum X;
-  case Decl::EnumConstant: // enum ? { X = ? }
-  case Decl::CXXRecord: // struct/union/class X; [C++]
+  case Decl::Function:     // void X();
  case Decl::StaticAssert: // static_assert(X, ""); [C++0x]
  case Decl::Label:        // __label__ x;
  case Decl::Import:
@@ -101,13 +97,21 @@ void CodeGenFunction::EmitDecl(const Dec
    // None of these decls require codegen support.
    return;

+  case Decl::Record:       // struct/union/class X;
+  case Decl::Enum:         // enum X;
+  case Decl::EnumConstant: // enum ? { X = ? }
+  case Decl::CXXRecord:    // struct/union/class X; [C++]
+    if (CGDebugInfo *DI = getDebugInfo())
+      DI->recordDeclarationLexicalScope(D);
+    return;
+
  case Decl::NamespaceAlias:
    if (CGDebugInfo *DI = getDebugInfo())
-        DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(D));
+      DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(D));
    return;
  case Decl::Using:          // using X; [C++]
    if (CGDebugInfo *DI = getDebugInfo())
-        DI->EmitUsingDecl(cast<UsingDecl>(D));
+      DI->EmitUsingDecl(cast<UsingDecl>(D));
    return;
  case Decl::UsingDirective: // using namespace X; [C++]
    if (CGDebugInfo *DI = getDebugInfo())
@@ -128,6 +132,9 @@ void CodeGenFunction::EmitDecl(const Dec
    const TypedefNameDecl &TD = cast<TypedefNameDecl>(D);
    QualType Ty = TD.getUnderlyingType();

+    if (CGDebugInfo *DI = getDebugInfo())
+      DI->recordDeclarationLexicalScope(D);
+
    if (Ty->isVariablyModifiedType())
      EmitVariablyModifiedType(Ty);
  }

Modified: cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp?rev=268055&r1=268054&r2=268055&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/debug-info-anon-union-vars.cpp Fri Apr 29 11:08:08 2016
@@ -44,8 +44,13 @@ void instantiate(int x) {
  buildBytes(x);
}

-// CHECK: !DIGlobalVariable(name: "c",{{.*}} file: [[FILE:.*]], line: 6,{{.*}} isLocal: true, isDefinition: true
-// CHECK: [[FILE]] = !DIFile(filename: "{{.*}}debug-info-anon-union-vars.cpp",
+// CHECK: ![[UNION:[0-9]+]] = distinct !DICompositeType(tag: DW_TAG_union_type,
+// CHECK-NOT: name:
+// CHECK: elements
+// CHECK: [[FILE:.*]] = !DIFile(filename: "{{.*}}debug-info-anon-union-vars.cpp",
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "i", scope: ![[UNION]],
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "c", scope: ![[UNION]],
+// CHECK: !DIGlobalVariable(name: "c",{{.*}} file: [[FILE]], line: 6,{{.*}} isLocal: true, isDefinition: true
// CHECK: !DIGlobalVariable(name: "d",{{.*}} file: [[FILE]], line: 6,{{.*}} isLocal: true, isDefinition: true
// CHECK: !DIGlobalVariable(name: "a",{{.*}} file: [[FILE]], line: 6,{{.*}} isLocal: true, isDefinition: true
// CHECK: !DIGlobalVariable(name: "b",{{.*}} file: [[FILE]], line: 6,{{.*}} isLocal: true, isDefinition: true
@@ -55,9 +60,4 @@ void instantiate(int x) {
// CHECK: !DILocalVariable(name: "c", {{.*}}, flags: DIFlagArtificial
// CHECK: !DILocalVariable(
// CHECK-NOT: name:
-// CHECK: type: ![[UNION:[0-9]+]]
-// CHECK: ![[UNION]] = distinct !DICompositeType(tag: DW_TAG_union_type,
-// CHECK-NOT: name:
-// CHECK: elements
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "i", scope: ![[UNION]],
-// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "c", scope: ![[UNION]],
+// CHECK: type: ![[UNION]]

Added: cfe/trunk/test/CodeGenCXX/debug-info-lb.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/debug-info-lb.cpp?rev=268055&view=auto
==============================================================================
--- cfe/trunk/test/CodeGenCXX/debug-info-lb.cpp (added)
+++ cfe/trunk/test/CodeGenCXX/debug-info-lb.cpp Fri Apr 29 11:08:08 2016
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -triple x86_64-none-linux-gnu -emit-llvm -debug-info-kind=limited %s -o - | FileCheck %s
+
+void foo() {
+  static int bar = 1;
+  {
+    struct X {};
+    typedef char Y;
+    static int bar = 0;
+    // The following basic block is intended, in order to check the case where
+    // types "X", "Y" are defined in a different scope than where they are used.
+    // They should have the scope they are defined at as their parent scope.
+    {
+      X a;
+      Y b;
+    }
+  }
+}
+
+// CHECK: !{{[0-9]+}} = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "X", scope: [[LBScope:![0-9]+]],
+// CHECK: [[LBScope]] = distinct !DILexicalBlock(scope: !{{[0-9]+}}, file: !{{[0-9]+}}, line: 5)
+
+// CHECK: [[FuncScope:![0-9]+]] = distinct !DISubprogram(name: "foo",
+
+// CHECK: !{{[0-9]+}} = !DIDerivedType(tag: DW_TAG_typedef, name: "Y", scope: [[LBScope]],
+// CHECK: !{{[0-9]+}} = distinct !DIGlobalVariable(name: "bar", scope: [[FuncScope]], file: !{{[0-9]+}}, line: 4
+// CHECK: !{{[0-9]+}} = distinct !DIGlobalVariable(name: "bar", scope: [[LBScope]], file: !{{[0-9]+}}, line: 8
+


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