r247618 - C11 _Bool bitfield diagnostic
Rachel Craik via cfe-commits
cfe-commits at lists.llvm.org
Mon Sep 14 14:27:36 PDT 2015
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);
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