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| author | Janis Johnson <janis187@us.ibm.com> | 2009-05-07 22:34:08 +0000 |
|---|---|---|
| committer | Janis Johnson <janis@gcc.gnu.org> | 2009-05-07 22:34:08 +0000 |
| commit | 6ec637a4b85abeee6570e4cb7786df53eadbaa40 (patch) | |
| tree | 478b0f3a70632c6c119442bb4244b21106b8a03a /gcc/c-cppbuiltin.c | |
| parent | 2995ed9a270259c4fbaa457913860bfab76565c0 (diff) | |
| download | gcc-6ec637a4b85abeee6570e4cb7786df53eadbaa40.zip gcc-6ec637a4b85abeee6570e4cb7786df53eadbaa40.tar.gz gcc-6ec637a4b85abeee6570e4cb7786df53eadbaa40.tar.bz2 | |
re PR c/39037 (FLOAT_CONST_DECIMAL64 pragma not supported)
gcc/
PR c/39037
* c-common.h (mark_valid_location_for_stdc_pragma,
valid_location_for_stdc_pragma_p, set_float_const_decimal64,
clear_float_const_decimal64, float_const_decimal64_p): New.
* c.opt (Wunsuffixed-float-constants): New.
* c-lex.c (interpret_float): Use pragma FLOAT_CONST_DECIMAL64 for
unsuffixed float constant, handle new warning.
* c-cppbuiltin.c (c_cpp_builtins): Use cast for double constants.
* c-decl.c (c_scope): New flag float_const_decimal64.
(set_float_const_decimal64, clear_float_const_decimal64,
float_const_decimal64_p): New.
(push_scope): Set new flag.
* c-parser.c (c_parser_translation_unit): Mark when it's valid
to use STDC pragmas.
(c_parser_external_declaration): Ditto.
(c_parser_compound_statement_nostart): Ditto.
* c-pragma.c (valid_location_for_stdc_pragma,
mark_valid_location_for_stdc_pragma,
valid_location_for_stdc_pragma_p, handle_stdc_pragma,
handle_pragma_float_const_decimal64): New.
(init_pragma): Register new pragma FLOAT_CONST_DECIMAL64.
* cp/semantics.c (valid_location_for_stdc_pragma_p,
set_float_const_decimal64, clear_float_const_decimal64,
float_const_decimal64_p): New dummy functions.
* doc/extend.texi (Decimal Float): Remove statement that the
pragma, and suffix for double constants, are not supported.
* doc/invoke.texi (Warning Options): List new option.
(-Wunsuffixed-float-constants): New.
gcc/testsuite
PR c/39037
* gcc.dg/Wunsuffixed-float-constants-1.c: New test.
* gcc.dg/cpp/pragma-float-const-decimal64-1.c: New test.
* gcc.dg/dfp/float-constant-double.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-1.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-2.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-3.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-4.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-5.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-6.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-7.c: New test.
* gcc.dg/dfp/pragma-float-const-decimal64-8.c: New test.
* g++.dg/cpp/pragma-float-const-decimal64-1.C: New test.
From-SVN: r147259
Diffstat (limited to 'gcc/c-cppbuiltin.c')
| -rw-r--r-- | gcc/c-cppbuiltin.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c index 8b776b1..921addb 100644 --- a/gcc/c-cppbuiltin.c +++ b/gcc/c-cppbuiltin.c @@ -619,14 +619,11 @@ c_cpp_builtins (cpp_reader *pfile) TARGET_DEC_EVAL_METHOD); builtin_define_float_constants ("FLT", "F", "%s", float_type_node); - /* Cast the double precision constants when single precision constants are - specified. The correct result is computed by the compiler when using - macros that include a cast. This has the side-effect of making the value - unusable in const expressions. */ - if (flag_single_precision_constant) - builtin_define_float_constants ("DBL", "L", "((double)%s)", double_type_node); - else - builtin_define_float_constants ("DBL", "", "%s", double_type_node); + /* Cast the double precision constants. This is needed when single + precision constants are specified or when pragma FLOAT_CONST_DECIMAL64 + is used. The correct result is computed by the compiler when using + macros that include a cast. */ + builtin_define_float_constants ("DBL", "L", "((double)%s)", double_type_node); builtin_define_float_constants ("LDBL", "L", "%s", long_double_type_node); /* For decfloat.h. */ |