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invoke.texi (C Dialect Options): Add missing builtins from c-common.c to list.

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* invoke.texi (C Dialect Options): Add missing builtins from
        c-common.c to list.
        * extend.texi (Other Builtins): Copy to this list.

From-SVN: r30470
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Hans-Peter Nilsson 1999-11-10 08:53:20 +01:00 committed by Jeff Law
parent 052777b9ae
commit 349c29b595
3 changed files with 30 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Wed Nov 10 00:51:41 1999 Hans-Peter Nilsson <hp@axis.se>
* invoke.texi (C Dialect Options): Add missing builtins from
c-common.c to list.
* extend.texi (Other Builtins): Copy to this list.
Wed Nov 10 04:58:09 1999 Alexandre Oliva <oliva@lsd.ic.unicamp.br>
* Makefile.in (recog.o): Use BASIC_BLOCK_H macro.

11
gcc/extend.texi
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@ -3136,11 +3136,12 @@ GNU CC includes builtin versions of many of the functions in the
standard C library. These will always be treated as having the same
meaning as the C library function even if you specify the
@samp{-fno-builtin} (@pxref{C Dialect Options}) option. These functions
correspond to the C library functions @code{alloca}, @code{ffs},
@code{abs}, @code{fabsf}, @code{fabs}, @code{fabsl}, @code{labs},
@code{memcpy}, @code{memcmp}, @code{strcmp}, @code{strcpy},
@code{strlen}, @code{sqrtf}, @code{sqrt}, @code{sqrtl}, @code{sinf},
@code{sin}, @code{sinl}, @code{cosf}, @code{cos}, and @code{cosl}.
correspond to the C library functions @code{abort}, @code{abs},
@code{alloca}, @code{cos}, @code{cosf}, @code{cosl}, @code{exit},
@code{_exit}, @code{fabs}, @code{fabsf}, @code{fabsl}, @code{ffs},
@code{labs}, @code{memcmp}, @code{memcpy}, @code{memset}, @code{sin},
@code{sinf}, @code{sinl}, @code{sqrt}, @code{sqrtf}, @code{sqrtl},
@code{strcmp}, @code{strcpy}, and @code{strlen}.
@findex __builtin_constant_p
You can use the builtin function @code{__builtin_constant_p} to

24
gcc/invoke.texi
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@ -714,22 +714,34 @@ other, C++-specific, extension keywords such as @code{headof}.
@findex abs
@findex alloca
@findex cos
@findex cosf
@findex cosl
@findex exit
@findex _exit
@findex fabs
@findex fabsf
@findex fabsl
@findex ffs
@findex labs
@findex memcmp
@findex memcpy
@findex memset
@findex sin
@findex sinf
@findex sinl
@findex sqrt
@findex sqrtf
@findex sqrtl
@findex strcmp
@findex strcpy
@findex strlen
Don't recognize builtin functions that do not begin with @samp{__builtin_}
as prefix. Currently, the functions affected include @code{abort},
@code{abs}, @code{alloca}, @code{cos}, @code{exit}, @code{fabs},
@code{ffs}, @code{labs}, @code{memcmp}, @code{memcpy}, @code{sin},
@code{sqrt}, @code{strcmp}, @code{strcpy}, and @code{strlen}.
@code{abs}, @code{alloca}, @code{cos}, @code{cosf}, @code{cosl},
@code{exit}, @code{_exit}, @code{fabs}, @code{fabsf}, @code{fabsl},
@code{ffs}, @code{labs}, @code{memcmp}, @code{memcpy}, @code{memset},
@code{sin}, @code{sinf}, @code{sinl}, @code{sqrt}, @code{sqrtf},
@code{sqrtl}, @code{strcmp}, @code{strcpy}, and @code{strlen}.
GCC normally generates special code to handle certain builtin functions
more efficiently; for instance, calls to @code{alloca} may become single
@ -739,9 +751,9 @@ and faster, but since the function calls no longer appear as such, you
cannot set a breakpoint on those calls, nor can you change the behavior
of the functions by linking with a different library.
The @samp{-ansi} option prevents @code{alloca} and @code{ffs} from being
builtin functions, since these functions do not have an ANSI standard
meaning.
The @samp{-ansi} option prevents @code{alloca}, @code{ffs} and @code{_exit}
from being builtin functions, since these functions do not have an ANSI
standard meaning.
@item -fhosted
@cindex hosted environment