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PR c/456
authorjsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4>
Sun, 29 Mar 2009 18:13:43 +0000 (18:13 +0000)
committerjsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4>
Sun, 29 Mar 2009 18:13:43 +0000 (18:13 +0000)
commita75b1c712f1eaddc69919461ead67f4ac21663fe
treea06c7550ad4d8d100141b10b1c0d61bf7548b888
parent088cc5d52e3bab879a7b3aa48b3de9127e948bb0
PR c/456
PR c/5675
PR c/19976
PR c/29116
PR c/31871
PR c/35198

fixincludes:
* inclhack.def (glibc_tgmath): New fix.
* fixincl.x: Regenerate.
* tests/base/tgmath.h: New.

gcc:
* builtins.c (fold_builtin_sincos): Build COMPOUND_EXPR in
void_type_node.
(fold_call_expr): Return a NOP_EXPR from folding rather than the
contained expression.
* c-common.c (c_fully_fold, c_fully_fold_internal, c_save_expr):
New.
(c_common_truthvalue_conversion): Use c_save_expr.  Do not fold
conditional expressions for C.
(decl_constant_value_for_optimization): Move from
decl_constant_value_for_broken_optimization in c-typeck.c.  Check
whether optimizing and that the expression is a VAR_DECL not of
array type instead of doing such checks in the caller.  Do not
check pedantic.  Call gcc_unreachable for C++.
* c-common.def (C_MAYBE_CONST_EXPR): New.
* c-common.h (c_fully_fold, c_save_expr,
decl_constant_value_for_optimization): New prototypes.
(C_MAYBE_CONST_EXPR_PRE, C_MAYBE_CONST_EXPR_EXPR,
C_MAYBE_CONST_EXPR_INT_OPERANDS, C_MAYBE_CONST_EXPR_NON_CONST,
EXPR_INT_CONST_OPERANDS): Define.
* c-convert.c (convert): Strip nops from expression.
* c-decl.c (groktypename): Take extra parameters expr and
expr_const_operands.  Update call to grokdeclarator.
(start_decl): Update call to grokdeclarator.  Add statement for
expressions used in type of decl.
(grokparm): Update call to grokdeclarator.
(push_parm_decl): Update call to grokdeclarator.
(build_compound_literal): Add parameter non_const and build a
C_MAYBE_COSNT_EXPR if applicable.
(grokdeclarator): Take extra parameters expr and
expr_const_operands.  Track expressions used in declaration
specifiers and declarators.  Fold array sizes and track whether
they are constant expressions and whether they are integer
constant expressions.
(parser_xref_tag): Set expr and expr_const_operands fields in
return value.
(grokfield): Update call to grokdeclarator.
(start_function): Update call to grokdeclarator.
(build_null_declspecs): Set expr and expr_const_operands fields in
return value.
(declspecs_add_type): Handle expressions in typeof specifiers.
* c-parser.c (c_parser_declspecs): Set expr and
expr_const_operands fields for declaration specifiers.
(c_parser_enum_specifier): Likewise.
(c_parser_struct_or_union_specifier): Likewise.
(c_parser_typeof_specifier): Likewise.  Update call to
groktypename.  Fold expression as needed.  Return expressions with
type instead of adding statements.
(c_parser_attributes): Update calls to c_parser_expr_list.
(c_parser_statement_after_labels): Fold expression before passing
to objc_build_throw_stmt.
(c_parser_condition): Fold expression.
(c_parser_asm_operands): Fold expression.
(c_parser_conditional_expression): Use c_save_expr.  Update call
to build_conditional_expr.
(c_parser_alignof_expression): Update call to groktypename.
(c_parser_postfix_expression): Preserve C_MAYBE_CONST_EXPR as
original_code.  Fold expression argument of va_arg.  Create
C_MAYBE_CONST_EXPR to preserve side effects of expressions in type
argument to va_arg.  Update calls to groktypename.  Fold array
index for offsetof.  Verify that first argument to
__builtin_choose_expr has integer type.
(c_parser_postfix_expression_after_paren_type): Update calls to
groktypename and build_compound_literal.  Handle expressions with
side effects in type name.
(c_parser_postfix_expression_after_primary): Update call to
c_parser_expr_list.  Set original_code for calls to
__builtin_constant_p.
(c_parser_expr_list): Take extra parameter fold_p.  Fold
expressions if requested.
(c_parser_objc_type_name): Update call to groktypename.
(c_parser_objc_synchronized_statement): Fold expression.
(c_parser_objc_receiver): Fold expression.
(c_parser_objc_keywordexpr): Update call to c_parser_expr_list.
(c_parser_omp_clause_num_threads, c_parser_omp_clause_schedule,
c_parser_omp_atomic, c_parser_omp_for_loop): Fold expressions.
* c-tree.h (CONSTRUCTOR_NON_CONST): Define.
(struct c_typespec): Add elements expr and expr_const_operands.
(struct c_declspecs): Add elements expr and expr_const_operands.
(groktypename, build_conditional_expr, build_compound_literal):
Update prototypes.
(in_late_binary_op): Declare.
* c-typeck.c (note_integer_operands): New function.
(in_late_binary_op): New variable.
(decl_constant_value_for_broken_optimization): Move to c-common.c
and rename to decl_constant_value_for_optimization.
(default_function_array_conversion): Do not strip nops.
(default_conversion): Do not call
decl_constant_value_for_broken_optimization.
(build_array_ref): Do not fold result.
(c_expr_sizeof_expr): Fold operand.  Use C_MAYBE_CONST_EXPR for
result when operand is a VLA.
(c_expr_sizeof_type): Update call to groktypename.  Handle
expressions included in type name.  Use C_MAYBE_CONST_EXPR for
result when operand names a VLA type.
(build_function_call): Update call to build_compound_literal.
Only fold result for calls to __builtin_* functions.  Strip
NOP_EXPR from INTEGER_CST returned from such functions.  Fold
the function designator.
(convert_arguments): Fold arguments.  Update call to
convert_for_assignment.
(build_unary_op): Handle increment and decrement of
C_MAYBE_CONST_EXPR.  Move lvalue checks for increment and
decrement earlier.  Fold operand of increment and decrement.
Handle address of C_MAYBE_CONST_EXPR.  Only fold expression being
built for integer operand.  Wrap returns that are INTEGER_CSTs
without being integer constant expressions or that have integer
constant operands without being INTEGER_CSTs.
(lvalue_p): Handle C_MAYBE_CONST_EXPR.
(build_conditional_expr): Add operand ifexp_bcp.  Track whether
result is an integer constant expression or can be used in
unevaluated parts of one and avoid folding and wrap as
appropriate.  Fold operands before possibly doing -Wsign-compare
warnings.
(build_compound_expr): Wrap result for C99 if operands can be used
in integer constant expressions.
(build_c_cast): Update call to digest_init.  Do not ignore
overflow from casting floating-point constants to integers.  Wrap
results that could be confused with integer constant expressions,
null pointer constants or floating-point constants.
(c_cast_expr): Update call to groktypename.  Handle expressions
included in type name.
(build_modify_expr): Handle modifying a C_MAYBE_CONST_EXPR.  Fold
lhs inside possible SAVE_EXPR.  Fold RHS before assignment.
Update calls to convert_for_assignment.
(convert_for_assignment): Take new parameter
null_pointer_constant.  Do not strip nops or call
decl_constant_value_for_broken_optimization.  Set
in_late_binary_op for conversions to boolean.
(store_init_value): Update call to digest_init.
(digest_init): Take new parameter null_pointer_constant.  Do not
call decl_constant_value_for_broken_optimization.  pedwarn for
initializers not constant expressions.  Update calls to
convert_for_assignment.
(constructor_nonconst): New.
(struct constructor_stack): Add nonconst element.
(really_start_incremental_init, push_init_level, pop_init_level):
Handle constructor_nonconst and nonconst element.
(set_init_index): Call constant_expression_warning for array
designators.
(output_init_element): Fold value.  Set constructor_nonconst as
applicable.  pedwarn for initializers not constant expressions.
Update call to digest_init.  Call constant_expression_warning
where constant initializers are required.
(process_init_element): Use c_save_expr.
(c_finish_goto_ptr): Fold expression.
(c_finish_return): Fold return value.  Update call to
convert_for_assignment.
(c_start_case): Fold switch expression.
(c_process_expr_stmt): Fold expression.
(c_finish_stmt_expr): Create C_MAYBE_CONST_EXPR as needed to
ensure statement expression is not evaluated in constant
expression.
(build_binary_op): Track whether results are integer constant
expressions or may occur in such, disable folding and wrap results
as applicable.  Fold operands for -Wsign-compare warnings unless
in_late_binary_op.
(c_objc_common_truthvalue_conversion): Handle results folded to
integer constants that are not integer constant expressions.
* doc/extend.texi: Document when typeof operands are evaluated,
that condition of __builtin_choose_expr is an integer constant
expression, and more about use of __builtin_constant_p in
initializers.

gcc/objc:
* objc-act.c (objc_finish_try_stmt): Set in_late_binary_op.

gcc/testsuite:
* gcc.c-torture/compile/20081108-1.c,
gcc.c-torture/compile/20081108-2.c,
gcc.c-torture/compile/20081108-3.c, gcc.dg/bconstp-2.c,
gcc.dg/bconstp-3.c, gcc.dg/bconstp-4.c, gcc.dg/c90-const-expr-6.c,
gcc.dg/c90-const-expr-7.c, gcc.dg/c90-const-expr-8.c,
gcc.dg/c90-const-expr-9.c, gcc.dg/c90-const-expr-10.c,
gcc.dg/c90-const-expr-11.c, gcc.dg/c99-const-expr-6.c,
gcc.dg/c99-const-expr-7.c, gcc.dg/c99-const-expr-8.c,
gcc.dg/c99-const-expr-9.c, gcc.dg/c99-const-expr-10.c,
gcc.dg/c99-const-expr-11.c, gcc.dg/c99-const-expr-12.c,
gcc.dg/c99-const-expr-13.c, gcc.dg/compare10.c,
gcc.dg/gnu89-const-expr-1.c, gcc.dg/gnu89-const-expr-2.c,
gcc.dg/gnu99-const-expr-1.c, gcc.dg/gnu99-const-expr-2.c,
gcc.dg/gnu99-const-expr-3.c, gcc.dg/vla-12.c, gcc.dg/vla-13.c,
gcc.dg/vla-14.c, gcc.dg/vla-15.c, gcc.dg/vla-16.c: New tests.
* gcc.dg/c90-const-expr-1.c, gcc.dg/c90-const-expr-2.c,
gcc.dg/c90-const-expr-3.c, gcc.dg/c99-const-expr-2.c,
gcc.dg/c99-const-expr-3.c, gcc.dg/c99-static-1.c: Remove XFAILs.
* gcc.dg/c90-const-expr-2.c: Use ZERO in place of 0 in another
case.
* gcc.dg/overflow-warn-1.c, gcc.dg/overflow-warn-2.c,
gcc.dg/overflow-warn-3.c, gcc.dg/overflow-warn-4.c: Remove
XFAILs.  Update expected messages.
* gcc.dg/pr14649-1.c, gcc.dg/pr19984.c, gcc.dg/pr25682.c: Update
expected messages.
* gcc.dg/real-const-1.c: Replace with test from original PR.
* gcc.dg/vect/pr32230.c: Use intermediate cast to __PTRDIFF_TYPE__
when casting from non-constant integer to pointer.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145254 138bc75d-0d04-0410-961f-82ee72b054a4
64 files changed:
fixincludes/ChangeLog
fixincludes/fixincl.x
fixincludes/inclhack.def
fixincludes/tests/base/tgmath.h [new file with mode: 0644]
gcc/ChangeLog
gcc/builtins.c
gcc/c-common.c
gcc/c-common.def
gcc/c-common.h
gcc/c-convert.c
gcc/c-decl.c
gcc/c-parser.c
gcc/c-tree.h
gcc/c-typeck.c
gcc/doc/extend.texi
gcc/objc/ChangeLog
gcc/objc/objc-act.c
gcc/testsuite/ChangeLog
gcc/testsuite/gcc.c-torture/compile/20081108-1.c [new file with mode: 0644]
gcc/testsuite/gcc.c-torture/compile/20081108-2.c [new file with mode: 0644]
gcc/testsuite/gcc.c-torture/compile/20081108-3.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/bconstp-2.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/bconstp-3.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/bconstp-4.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c90-const-expr-1.c
gcc/testsuite/gcc.dg/c90-const-expr-10.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c90-const-expr-11.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c90-const-expr-2.c
gcc/testsuite/gcc.dg/c90-const-expr-3.c
gcc/testsuite/gcc.dg/c90-const-expr-6.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c90-const-expr-7.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c90-const-expr-8.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c90-const-expr-9.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-10.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-11.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-12.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-13.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-2.c
gcc/testsuite/gcc.dg/c99-const-expr-3.c
gcc/testsuite/gcc.dg/c99-const-expr-6.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-7.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-8.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-const-expr-9.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/c99-static-1.c
gcc/testsuite/gcc.dg/compare10.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/gnu89-const-expr-1.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/gnu89-const-expr-2.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/gnu99-const-expr-1.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/gnu99-const-expr-2.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/gnu99-const-expr-3.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/overflow-warn-1.c
gcc/testsuite/gcc.dg/overflow-warn-2.c
gcc/testsuite/gcc.dg/overflow-warn-3.c
gcc/testsuite/gcc.dg/overflow-warn-4.c
gcc/testsuite/gcc.dg/pr14649-1.c
gcc/testsuite/gcc.dg/pr19984.c
gcc/testsuite/gcc.dg/pr25682.c
gcc/testsuite/gcc.dg/real-const-1.c
gcc/testsuite/gcc.dg/vect/pr32230.c
gcc/testsuite/gcc.dg/vla-12.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/vla-13.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/vla-14.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/vla-15.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/vla-16.c [new file with mode: 0644]