[PATCH] D77436: [DebugInfo] Fix for adding "returns cxx udt" option to functions in CodeView.
Amy Huang via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Tue Apr 7 09:13:33 PDT 2020
This revision was automatically updated to reflect the committed changes.
Closed by commit rGbcf66084eddd: [DebugInfo] Fix for adding "returns cxx udt" option to functions in CodeView. (authored by akhuang).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D77436/new/
https://reviews.llvm.org/D77436
Files:
clang/lib/CodeGen/CGDebugInfo.cpp
clang/test/CodeGenCXX/debug-info-composite-triviality-fwd-decl.cpp
Index: clang/test/CodeGenCXX/debug-info-composite-triviality-fwd-decl.cpp
===================================================================
--- /dev/null
+++ clang/test/CodeGenCXX/debug-info-composite-triviality-fwd-decl.cpp
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -emit-llvm -gcodeview -debug-info-kind=limited -x c %s -o - | FileCheck %s --check-prefix CHECK-C
+// RUN: %clang_cc1 -emit-llvm -gcodeview -debug-info-kind=limited -x c++ %s -o - | FileCheck %s --check-prefix CHECK-CXX
+//
+// Test for DIFlagNonTrivial on forward declared DICompositeTypes.
+
+struct Incomplete;
+struct Incomplete (*func_ptr)() = 0;
+// CHECK-C: !DICompositeType({{.*}}name: "Incomplete"
+// CHECK-C-NOT: DIFlagNonTrivial
+// CHECK-CXX: !DICompositeType({{.*}}name: "Incomplete"
+// CHECK-CXX-SAME: DIFlagNonTrivial
Index: clang/lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- clang/lib/CodeGen/CGDebugInfo.cpp
+++ clang/lib/CodeGen/CGDebugInfo.cpp
@@ -991,11 +991,21 @@
uint64_t Size = 0;
uint32_t Align = 0;
+ llvm::DINode::DIFlags Flags = llvm::DINode::FlagFwdDecl;
+
+ // Add flag to nontrivial forward declarations. To be consistent with MSVC,
+ // add the flag if a record has no definition because we don't know whether
+ // it will be trivial or not.
+ if (const CXXRecordDecl *CXXRD = dyn_cast<CXXRecordDecl>(RD))
+ if (!CXXRD->hasDefinition() ||
+ (CXXRD->hasDefinition() && !CXXRD->isTrivial()))
+ Flags |= llvm::DINode::FlagNonTrivial;
+
// Create the type.
SmallString<256> Identifier = getTypeIdentifier(Ty, CGM, TheCU);
llvm::DICompositeType *RetTy = DBuilder.createReplaceableCompositeType(
- getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align,
- llvm::DINode::FlagFwdDecl, Identifier);
+ getTagForRecord(RD), RDName, Ctx, DefUnit, Line, 0, Size, Align, Flags,
+ Identifier);
if (CGM.getCodeGenOpts().DebugFwdTemplateParams)
if (auto *TSpecial = dyn_cast<ClassTemplateSpecializationDecl>(RD))
DBuilder.replaceArrays(RetTy, llvm::DINodeArray(),
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