r247618 - C11 _Bool bitfield diagnostic
David Majnemer via cfe-commits
cfe-commits at lists.llvm.org
Mon Sep 14 17:55:36 PDT 2015
On Mon, Sep 14, 2015 at 5:40 PM, Richard Smith <richard at metafoo.co.uk>
wrote:
> On Mon, Sep 14, 2015 at 5:31 PM, David Majnemer <david.majnemer at gmail.com>
> wrote:
>
>> On Mon, Sep 14, 2015 at 5:28 PM, Richard Smith via cfe-commits <
>> cfe-commits at lists.llvm.org> wrote:
>>
>>> On Mon, Sep 14, 2015 at 5:18 PM, Nico Weber via cfe-commits <
>>> cfe-commits at lists.llvm.org> wrote:
>>>
>>>> This also fires for bool in C++ files, even though the commit message
>>>> saying C11 and _Bool. Given the test changes, I suppose that's intentional?
>>>> This fires a lot on existing code, for example protobuf:
>>>>
>>>> ../../third_party/protobuf/src/google/protobuf/extension_set.h:465:10:
>>>> error: width of bit-field 'is_cleared' (4 bits) exceeds the width of its
>>>> type; value will be truncated to 1 bit [-Werror,-Wbitfield-width]
>>>> bool is_cleared : 4;
>>>> ^
>>>> ../../third_party/protobuf/src/google/protobuf/extension_set.h:472:10:
>>>> error: width of bit-field 'is_lazy' (4 bits) exceeds the width of its type;
>>>> value will be truncated to 1 bit [-Werror,-Wbitfield-width]
>>>> bool is_lazy : 4;
>>>> ^
>>>>
>>>> Is this expected? Is this a behavior change, or did the truncation
>>>> happen previously and it's now just getting warned on?
>>>>
>>>
>>> The code previously assumed that MSVC used the C rules here; it appears
>>> that's not true in all cases.
>>>
>>> Can we just remove the " || IsMsStruct || Context.getTargetInfo().getCXXABI().isMicrosoft()"?
>>> Is there some reason we need to prohibit overwide bitfields for MS bitfield
>>> layout, rather than just warning on them? (Does record layout fail somehow?)
>>>
>>
>> Record layout will fail for stuff like 'int x : 33' but will not fail for
>> stuff like '{bool,_Bool} y : 2'; the bitfield layout algorithm cares about
>> the storage size (which, of course, includes padding). This patch makes
>> 'bool y : 2' an error which is a behavior change, I'm working on patch to
>> address this.
>>
>
> Do we need to be compatible with this MSVC bug? It would seem feasible to
> teach our MS record layout to do the right thing with over-wide bitfields
> and downgrade this to the normal warning in C++.
>
It is possible to add support for over-wide bitfields but this is not
completely trivial. There is a fair amount of code in Clang which deals
with emission of bitfields (RecordLayoutBuilder,
CGRecordLayoutBuilder, ConstStructBuilder) and I don't think I have the
bandwidth to audit the impact of such a change right now.
>
>
>> On Mon, Sep 14, 2015 at 2:27 PM, Rachel Craik via cfe-commits <
>>>> cfe-commits at lists.llvm.org> wrote:
>>>>
>>>>> Author: rcraik
>>>>> Date: Mon Sep 14 16:27:36 2015
>>>>> New Revision: 247618
>>>>>
>>>>> URL: http://llvm.org/viewvc/llvm-project?rev=247618&view=rev
>>>>> Log:
>>>>> C11 _Bool bitfield diagnostic
>>>>>
>>>>> Summary: Implement DR262 (for C). This patch will mainly affect
>>>>> bitfields of type _Bool
>>>>>
>>>>> Reviewers: fraggamuffin, rsmith
>>>>>
>>>>> Subscribers: hubert.reinterpretcast, cfe-commits
>>>>>
>>>>> Differential Revision: http://reviews.llvm.org/D10018
>>>>>
>>>>> Modified:
>>>>> cfe/trunk/include/clang/Basic/DiagnosticGroups.td
>>>>> cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
>>>>> cfe/trunk/lib/Sema/SemaDecl.cpp
>>>>> cfe/trunk/test/CodeGen/bitfield-2.c
>>>>> cfe/trunk/test/CodeGenCXX/warn-padded-packed.cpp
>>>>> cfe/trunk/test/Misc/warning-flags.c
>>>>> cfe/trunk/test/Sema/bitfield.c
>>>>> cfe/trunk/test/SemaCXX/bitfield-layout.cpp
>>>>> cfe/trunk/test/SemaCXX/constant-expression-cxx11.cpp
>>>>> cfe/trunk/test/SemaCXX/constant-expression-cxx1y.cpp
>>>>> cfe/trunk/test/SemaCXX/ms_wide_bitfield.cpp
>>>>> cfe/trunk/test/SemaObjC/class-bitfield.m
>>>>>
>>>>> Modified: cfe/trunk/include/clang/Basic/DiagnosticGroups.td
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticGroups.td?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/include/clang/Basic/DiagnosticGroups.td (original)
>>>>> +++ cfe/trunk/include/clang/Basic/DiagnosticGroups.td Mon Sep 14
>>>>> 16:27:36 2015
>>>>> @@ -32,6 +32,7 @@ def AutoImport : DiagGroup<"auto-import"
>>>>> def GNUBinaryLiteral : DiagGroup<"gnu-binary-literal">;
>>>>> def GNUCompoundLiteralInitializer :
>>>>> DiagGroup<"gnu-compound-literal-initializer">;
>>>>> def BitFieldConstantConversion :
>>>>> DiagGroup<"bitfield-constant-conversion">;
>>>>> +def BitFieldWidth : DiagGroup<"bitfield-width">;
>>>>> def ConstantConversion :
>>>>> DiagGroup<"constant-conversion", [ BitFieldConstantConversion ] >;
>>>>> def LiteralConversion : DiagGroup<"literal-conversion">;
>>>>>
>>>>> Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
>>>>> +++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Mon Sep 14
>>>>> 16:27:36 2015
>>>>> @@ -4314,20 +4314,21 @@ def err_bitfield_has_negative_width : Er
>>>>> def err_anon_bitfield_has_negative_width : Error<
>>>>> "anonymous bit-field has negative width (%0)">;
>>>>> def err_bitfield_has_zero_width : Error<"named bit-field %0 has zero
>>>>> width">;
>>>>> -def err_bitfield_width_exceeds_type_size : Error<
>>>>> - "size of bit-field %0 (%1 bits) exceeds size of its type (%2
>>>>> bits)">;
>>>>> -def err_anon_bitfield_width_exceeds_type_size : Error<
>>>>> - "size of anonymous bit-field (%0 bits) exceeds size of its type (%1
>>>>> bits)">;
>>>>> +def err_bitfield_width_exceeds_type_width : Error<
>>>>> + "width of bit-field %0 (%1 bits) exceeds width of its type (%2
>>>>> bit%s2)">;
>>>>> +def err_anon_bitfield_width_exceeds_type_width : Error<
>>>>> + "width of anonymous bit-field (%0 bits) exceeds width of its type "
>>>>> + "(%1 bit%s1)">;
>>>>> def err_incorrect_number_of_vector_initializers : Error<
>>>>> "number of elements must be either one or match the size of the
>>>>> vector">;
>>>>>
>>>>> // Used by C++ which allows bit-fields that are wider than the type.
>>>>> -def warn_bitfield_width_exceeds_type_size: Warning<
>>>>> - "size of bit-field %0 (%1 bits) exceeds the size of its type; value
>>>>> will be "
>>>>> - "truncated to %2 bits">;
>>>>> -def warn_anon_bitfield_width_exceeds_type_size : Warning<
>>>>> - "size of anonymous bit-field (%0 bits) exceeds size of its type;
>>>>> value will "
>>>>> - "be truncated to %1 bits">;
>>>>> +def warn_bitfield_width_exceeds_type_width: Warning<
>>>>> + "width of bit-field %0 (%1 bits) exceeds the width of its type;
>>>>> value will "
>>>>> + "be truncated to %2 bit%s2">, InGroup<BitFieldWidth>;
>>>>> +def warn_anon_bitfield_width_exceeds_type_width : Warning<
>>>>> + "width of anonymous bit-field (%0 bits) exceeds width of its type;
>>>>> value "
>>>>> + "will be truncated to %1 bit%s1">, InGroup<BitFieldWidth>;
>>>>>
>>>>> def warn_missing_braces : Warning<
>>>>> "suggest braces around initialization of subobject">,
>>>>>
>>>>> Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
>>>>> +++ cfe/trunk/lib/Sema/SemaDecl.cpp Mon Sep 14 16:27:36 2015
>>>>> @@ -12625,26 +12625,26 @@ ExprResult Sema::VerifyBitField(SourceLo
>>>>> }
>>>>>
>>>>> if (!FieldTy->isDependentType()) {
>>>>> - uint64_t TypeSize = Context.getTypeSize(FieldTy);
>>>>> - if (Value.getZExtValue() > TypeSize) {
>>>>> + uint64_t TypeWidth = Context.getIntWidth(FieldTy);
>>>>> + if (Value.ugt(TypeWidth)) {
>>>>> if (!getLangOpts().CPlusPlus || IsMsStruct ||
>>>>> Context.getTargetInfo().getCXXABI().isMicrosoft()) {
>>>>> if (FieldName)
>>>>> - return Diag(FieldLoc,
>>>>> diag::err_bitfield_width_exceeds_type_size)
>>>>> + return Diag(FieldLoc,
>>>>> diag::err_bitfield_width_exceeds_type_width)
>>>>> << FieldName << (unsigned)Value.getZExtValue()
>>>>> - << (unsigned)TypeSize;
>>>>> + << (unsigned)TypeWidth;
>>>>>
>>>>> - return Diag(FieldLoc,
>>>>> diag::err_anon_bitfield_width_exceeds_type_size)
>>>>> - << (unsigned)Value.getZExtValue() << (unsigned)TypeSize;
>>>>> + return Diag(FieldLoc,
>>>>> diag::err_anon_bitfield_width_exceeds_type_width)
>>>>> + << (unsigned)Value.getZExtValue() << (unsigned)TypeWidth;
>>>>> }
>>>>>
>>>>> if (FieldName)
>>>>> - Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_size)
>>>>> + Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_width)
>>>>> << FieldName << (unsigned)Value.getZExtValue()
>>>>> - << (unsigned)TypeSize;
>>>>> + << (unsigned)TypeWidth;
>>>>> else
>>>>> - Diag(FieldLoc,
>>>>> diag::warn_anon_bitfield_width_exceeds_type_size)
>>>>> - << (unsigned)Value.getZExtValue() << (unsigned)TypeSize;
>>>>> + Diag(FieldLoc,
>>>>> diag::warn_anon_bitfield_width_exceeds_type_width)
>>>>> + << (unsigned)Value.getZExtValue() << (unsigned)TypeWidth;
>>>>> }
>>>>> }
>>>>>
>>>>>
>>>>> Modified: cfe/trunk/test/CodeGen/bitfield-2.c
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/bitfield-2.c?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/CodeGen/bitfield-2.c (original)
>>>>> +++ cfe/trunk/test/CodeGen/bitfield-2.c Mon Sep 14 16:27:36 2015
>>>>> @@ -237,7 +237,7 @@ unsigned long long test_5() {
>>>>> /***/
>>>>>
>>>>> struct s6 {
>>>>> - _Bool f0 : 2;
>>>>> + unsigned f0 : 2;
>>>>> };
>>>>>
>>>>> struct s6 g6 = { 0xF };
>>>>>
>>>>> Modified: cfe/trunk/test/CodeGenCXX/warn-padded-packed.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/warn-padded-packed.cpp?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/CodeGenCXX/warn-padded-packed.cpp (original)
>>>>> +++ cfe/trunk/test/CodeGenCXX/warn-padded-packed.cpp Mon Sep 14
>>>>> 16:27:36 2015
>>>>> @@ -69,7 +69,7 @@ struct S12 {
>>>>>
>>>>> struct S13 { // expected-warning {{padding size of 'S13' with 6 bits
>>>>> to alignment boundary}}
>>>>> char c;
>>>>> - bool b : 10; // expected-warning {{size of bit-field 'b' (10 bits)
>>>>> exceeds the size of its type}}
>>>>> + bool b : 10; // expected-warning {{width of bit-field 'b' (10 bits)
>>>>> exceeds the width of its type}}
>>>>> };
>>>>>
>>>>> // The warnings are emitted when the layout of the structs is
>>>>> computed, so we have to use them.
>>>>>
>>>>> Modified: cfe/trunk/test/Misc/warning-flags.c
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Misc/warning-flags.c?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/Misc/warning-flags.c (original)
>>>>> +++ cfe/trunk/test/Misc/warning-flags.c Mon Sep 14 16:27:36 2015
>>>>> @@ -18,7 +18,7 @@ This test serves two purposes:
>>>>>
>>>>> The list of warnings below should NEVER grow. It should gradually
>>>>> shrink to 0.
>>>>>
>>>>> -CHECK: Warnings without flags (92):
>>>>> +CHECK: Warnings without flags (90):
>>>>> CHECK-NEXT: ext_excess_initializers
>>>>> CHECK-NEXT: ext_excess_initializers_in_char_array_initializer
>>>>> CHECK-NEXT: ext_expected_semi_decl_list
>>>>> @@ -44,10 +44,8 @@ CHECK-NEXT: pp_pragma_once_in_main_fil
>>>>> CHECK-NEXT: pp_pragma_sysheader_in_main_file
>>>>> CHECK-NEXT: w_asm_qualifier_ignored
>>>>> CHECK-NEXT: warn_accessor_property_type_mismatch
>>>>> -CHECK-NEXT: warn_anon_bitfield_width_exceeds_type_size
>>>>> CHECK-NEXT: warn_arcmt_nsalloc_realloc
>>>>> CHECK-NEXT: warn_asm_label_on_auto_decl
>>>>> -CHECK-NEXT: warn_bitfield_width_exceeds_type_size
>>>>> CHECK-NEXT: warn_c_kext
>>>>> CHECK-NEXT: warn_call_to_pure_virtual_member_function_from_ctor_dtor
>>>>> CHECK-NEXT: warn_call_wrong_number_of_arguments
>>>>>
>>>>> Modified: cfe/trunk/test/Sema/bitfield.c
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/bitfield.c?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/Sema/bitfield.c (original)
>>>>> +++ cfe/trunk/test/Sema/bitfield.c Mon Sep 14 16:27:36 2015
>>>>> @@ -6,7 +6,7 @@ struct a {
>>>>> int a : -1; // expected-error{{bit-field 'a' has negative width}}
>>>>>
>>>>> // rdar://6081627
>>>>> - int b : 33; // expected-error{{size of bit-field 'b' (33 bits)
>>>>> exceeds size of its type (32 bits)}}
>>>>> + int b : 33; // expected-error{{width of bit-field 'b' (33 bits)
>>>>> exceeds width of its type (32 bits)}}
>>>>>
>>>>> int c : (1 + 0.25); // expected-error{{expression is not an integer
>>>>> constant expression}}
>>>>> int d : (int)(1 + 0.25);
>>>>> @@ -22,9 +22,12 @@ struct a {
>>>>> int g : (_Bool)1;
>>>>>
>>>>> // PR4017
>>>>> - char : 10; // expected-error {{size of anonymous bit-field (10
>>>>> bits) exceeds size of its type (8 bits)}}
>>>>> + char : 10; // expected-error {{width of anonymous bit-field
>>>>> (10 bits) exceeds width of its type (8 bits)}}
>>>>> unsigned : -2; // expected-error {{anonymous bit-field has
>>>>> negative width (-2)}}
>>>>> float : 12; // expected-error {{anonymous bit-field has
>>>>> non-integral type 'float'}}
>>>>> +
>>>>> + _Bool : 2; // expected-error {{width of anonymous bit-field (2
>>>>> bits) exceeds width of its type (1 bit)}}
>>>>> + _Bool h : 5; // expected-error {{width of bit-field 'h' (5 bits)
>>>>> exceeds width of its type (1 bit)}}
>>>>> };
>>>>>
>>>>> struct b {unsigned x : 2;} x;
>>>>>
>>>>> Modified: cfe/trunk/test/SemaCXX/bitfield-layout.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/bitfield-layout.cpp?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/SemaCXX/bitfield-layout.cpp (original)
>>>>> +++ cfe/trunk/test/SemaCXX/bitfield-layout.cpp Mon Sep 14 16:27:36 2015
>>>>> @@ -5,25 +5,25 @@
>>>>>
>>>>> // Simple tests.
>>>>> struct Test1 {
>>>>> - char c : 9; // expected-warning {{size of bit-field 'c' (9 bits)
>>>>> exceeds the size of its type; value will be truncated to 8 bits}}
>>>>> + char c : 9; // expected-warning {{width of bit-field 'c' (9 bits)
>>>>> exceeds the width of its type; value will be truncated to 8 bits}}
>>>>> };
>>>>> CHECK_SIZE(Test1, 2);
>>>>> CHECK_ALIGN(Test1, 1);
>>>>>
>>>>> struct Test2 {
>>>>> - char c : 16; // expected-warning {{size of bit-field 'c' (16 bits)
>>>>> exceeds the size of its type; value will be truncated to 8 bits}}
>>>>> + char c : 16; // expected-warning {{width of bit-field 'c' (16 bits)
>>>>> exceeds the width of its type; value will be truncated to 8 bits}}
>>>>> };
>>>>> CHECK_SIZE(Test2, 2);
>>>>> CHECK_ALIGN(Test2, 2);
>>>>>
>>>>> struct Test3 {
>>>>> - char c : 32; // expected-warning {{size of bit-field 'c' (32 bits)
>>>>> exceeds the size of its type; value will be truncated to 8 bits}}
>>>>> + char c : 32; // expected-warning {{width of bit-field 'c' (32 bits)
>>>>> exceeds the width of its type; value will be truncated to 8 bits}}
>>>>> };
>>>>> CHECK_SIZE(Test3, 4);
>>>>> CHECK_ALIGN(Test3, 4);
>>>>>
>>>>> struct Test4 {
>>>>> - char c : 64; // expected-warning {{size of bit-field 'c' (64 bits)
>>>>> exceeds the size of its type; value will be truncated to 8 bits}}
>>>>> + char c : 64; // expected-warning {{width of bit-field 'c' (64 bits)
>>>>> exceeds the width of its type; value will be truncated to 8 bits}}
>>>>> };
>>>>> CHECK_SIZE(Test4, 8);
>>>>> CHECK_ALIGN(Test4, 8);
>>>>>
>>>>> Modified: cfe/trunk/test/SemaCXX/constant-expression-cxx11.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/constant-expression-cxx11.cpp?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/SemaCXX/constant-expression-cxx11.cpp (original)
>>>>> +++ cfe/trunk/test/SemaCXX/constant-expression-cxx11.cpp Mon Sep 14
>>>>> 16:27:36 2015
>>>>> @@ -1801,9 +1801,9 @@ namespace Bitfields {
>>>>> bool b : 1;
>>>>> unsigned u : 5;
>>>>> int n : 5;
>>>>> - bool b2 : 3;
>>>>> - unsigned u2 : 74; // expected-warning {{exceeds the size of its
>>>>> type}}
>>>>> - int n2 : 81; // expected-warning {{exceeds the size of its type}}
>>>>> + bool b2 : 3; // expected-warning {{exceeds the width of its type}}
>>>>> + unsigned u2 : 74; // expected-warning {{exceeds the width of its
>>>>> type}}
>>>>> + int n2 : 81; // expected-warning {{exceeds the width of its type}}
>>>>> };
>>>>>
>>>>> constexpr A a = { false, 33, 31, false, 0xffffffff, 0x7fffffff };
>>>>> // expected-warning 2{{truncation}}
>>>>>
>>>>> Modified: cfe/trunk/test/SemaCXX/constant-expression-cxx1y.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/constant-expression-cxx1y.cpp?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/SemaCXX/constant-expression-cxx1y.cpp (original)
>>>>> +++ cfe/trunk/test/SemaCXX/constant-expression-cxx1y.cpp Mon Sep 14
>>>>> 16:27:36 2015
>>>>> @@ -872,7 +872,7 @@ namespace Lifetime {
>>>>>
>>>>> namespace Bitfields {
>>>>> struct A {
>>>>> - bool b : 3;
>>>>> + bool b : 1;
>>>>> int n : 4;
>>>>> unsigned u : 5;
>>>>> };
>>>>>
>>>>> Modified: cfe/trunk/test/SemaCXX/ms_wide_bitfield.cpp
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/ms_wide_bitfield.cpp?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/SemaCXX/ms_wide_bitfield.cpp (original)
>>>>> +++ cfe/trunk/test/SemaCXX/ms_wide_bitfield.cpp Mon Sep 14 16:27:36
>>>>> 2015
>>>>> @@ -1,9 +1,10 @@
>>>>> // RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple i686-pc-win32
>>>>> -fdump-record-layouts -fsyntax-only -mms-bitfields -verify %s 2>&1
>>>>>
>>>>> struct A {
>>>>> - char a : 9; // expected-error{{size of bit-field 'a' (9 bits)
>>>>> exceeds size of its type (8 bits)}}
>>>>> - int b : 33; // expected-error{{size of bit-field 'b' (33 bits)
>>>>> exceeds size of its type (32 bits)}}
>>>>> - bool c : 9; // expected-error{{size of bit-field 'c' (9 bits)
>>>>> exceeds size of its type (8 bits)}}
>>>>> + char a : 9; // expected-error{{width of bit-field 'a' (9 bits)
>>>>> exceeds width of its type (8 bits)}}
>>>>> + int b : 33; // expected-error{{width of bit-field 'b' (33 bits)
>>>>> exceeds width of its type (32 bits)}}
>>>>> + bool c : 9; // expected-error{{width of bit-field 'c' (9 bits)
>>>>> exceeds width of its type (1 bit)}}
>>>>> + bool d : 3; // expected-error{{width of bit-field 'd' (3 bits)
>>>>> exceeds width of its type (1 bit)}}
>>>>> };
>>>>>
>>>>> int a[sizeof(A) == 1 ? 1 : -1];
>>>>>
>>>>> Modified: cfe/trunk/test/SemaObjC/class-bitfield.m
>>>>> URL:
>>>>> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjC/class-bitfield.m?rev=247618&r1=247617&r2=247618&view=diff
>>>>>
>>>>> ==============================================================================
>>>>> --- cfe/trunk/test/SemaObjC/class-bitfield.m (original)
>>>>> +++ cfe/trunk/test/SemaObjC/class-bitfield.m Mon Sep 14 16:27:36 2015
>>>>> @@ -5,7 +5,7 @@
>>>>> int a : -1; // expected-error{{bit-field 'a' has negative width}}
>>>>>
>>>>> // rdar://6081627
>>>>> - int b : 33; // expected-error{{size of bit-field 'b' (33 bits)
>>>>> exceeds size of its type (32 bits)}}
>>>>> + int b : 33; // expected-error{{width of bit-field 'b' (33 bits)
>>>>> exceeds width of its type (32 bits)}}
>>>>>
>>>>> int c : (1 + 0.25); // expected-error{{expression is not an integer
>>>>> constant expression}}
>>>>> int d : (int)(1 + 0.25);
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> cfe-commits mailing list
>>>>> cfe-commits at lists.llvm.org
>>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
>>>>>
>>>>
>>>>
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>
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