This revision was automatically updated to reflect the committed changes.
Closed by commit rG8f8e450b6682: [clang] Fix crash on attempt to initialize
union with flexible array member (authored by Fznamznon).
Changed prior to commit:
https://reviews.llvm.org/D150435?vs=523723&id=524278#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D150435/new/
https://reviews.llvm.org/D150435
Files:
clang/docs/ReleaseNotes.rst
clang/lib/Sema/SemaInit.cpp
clang/test/Sema/flexible-array-in-union.c
Index: clang/test/Sema/flexible-array-in-union.c
===================================================================
--- /dev/null
+++ clang/test/Sema/flexible-array-in-union.c
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 %s -verify=c -fsyntax-only
+// RUN: %clang_cc1 %s -verify -fsyntax-only -x c++
+// RUN: %clang_cc1 %s -verify -fsyntax-only -fms-compatibility
+// RUN: %clang_cc1 %s -verify -fsyntax-only -fms-compatibility -x c++
+
+// The test checks that an attempt to initialize union with flexible array
+// member with an initializer list doesn't crash clang.
+
+
+union { char x[]; } r = {0}; // c-error {{flexible array member 'x' in a union
is not allowed}}
+
+// expected-no-diagnostics
+
Index: clang/lib/Sema/SemaInit.cpp
===================================================================
--- clang/lib/Sema/SemaInit.cpp
+++ clang/lib/Sema/SemaInit.cpp
@@ -811,7 +811,7 @@
// order to leave them uninitialized, the ILE is expanded and the extra
// fields are then filled with NoInitExpr.
unsigned NumElems = numStructUnionElements(ILE->getType());
- if (RDecl->hasFlexibleArrayMember())
+ if (!RDecl->isUnion() && RDecl->hasFlexibleArrayMember())
++NumElems;
if (!VerifyOnly && ILE->getNumInits() < NumElems)
ILE->resizeInits(SemaRef.Context, NumElems);
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -418,6 +418,8 @@
- Propagate the value-dependent bit for VAArgExpr. Fixes a crash where a
__builtin_va_arg call has invalid arguments.
(`#62711 <https://github.com/llvm/llvm-project/issues/62711>`_).
+- Fix crash on attempt to initialize union with flexible array member.
+ (`#61746 <https://github.com/llvm/llvm-project/issues/61746>`_).
Bug Fixes to Compiler Builtins
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Index: clang/test/Sema/flexible-array-in-union.c
===================================================================
--- /dev/null
+++ clang/test/Sema/flexible-array-in-union.c
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 %s -verify=c -fsyntax-only
+// RUN: %clang_cc1 %s -verify -fsyntax-only -x c++
+// RUN: %clang_cc1 %s -verify -fsyntax-only -fms-compatibility
+// RUN: %clang_cc1 %s -verify -fsyntax-only -fms-compatibility -x c++
+
+// The test checks that an attempt to initialize union with flexible array
+// member with an initializer list doesn't crash clang.
+
+
+union { char x[]; } r = {0}; // c-error {{flexible array member 'x' in a union is not allowed}}
+
+// expected-no-diagnostics
+
Index: clang/lib/Sema/SemaInit.cpp
===================================================================
--- clang/lib/Sema/SemaInit.cpp
+++ clang/lib/Sema/SemaInit.cpp
@@ -811,7 +811,7 @@
// order to leave them uninitialized, the ILE is expanded and the extra
// fields are then filled with NoInitExpr.
unsigned NumElems = numStructUnionElements(ILE->getType());
- if (RDecl->hasFlexibleArrayMember())
+ if (!RDecl->isUnion() && RDecl->hasFlexibleArrayMember())
++NumElems;
if (!VerifyOnly && ILE->getNumInits() < NumElems)
ILE->resizeInits(SemaRef.Context, NumElems);
Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -418,6 +418,8 @@
- Propagate the value-dependent bit for VAArgExpr. Fixes a crash where a
__builtin_va_arg call has invalid arguments.
(`#62711 <https://github.com/llvm/llvm-project/issues/62711>`_).
+- Fix crash on attempt to initialize union with flexible array member.
+ (`#61746 <https://github.com/llvm/llvm-project/issues/61746>`_).
Bug Fixes to Compiler Builtins
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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