gcc/gcc ChangeLog fold-const.c tree.h c-typeck ...

[sayle@gcc.gnu.org]

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2003-07-18 00:26:52

Modified files:
	gcc            : ChangeLog fold-const.c tree.h c-typeck.c 
	                 simplify-rtx.c 

Log message:
	* fold-const.c (const_binop): Avoid performing the FP operation at
	compile-time, if either operand is NaN and we honor signaling NaNs,
	or if we're dividing by zero and either flag_trapping_math is set
	or the desired mode doesn't support infinities.
	(fold_initializer): New function to fold an expression ignoring any
	potential run-time exceptions or traps.
	* tree.h (fold_initializer): Prototype here.
	* c-typeck.c (build_binary_op): Move to the end of the file so
	that intializer_stack is in scope.  If constructing an initializer,
	i.e. when initializer_stack is not NULL, use fold_initializer to
	fold expressions.
	* simplify-rtx.c (simplify_binary_operation): Likewise, avoid
	performing FP operations at compile-time, if they would raise an
	exception at run-time.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.547&r2=2.548
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.280&r2=1.281
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.h.diff?cvsroot=gcc&r1=1.427&r2=1.428
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-typeck.c.diff?cvsroot=gcc&r1=1.246&r2=1.247
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/simplify-rtx.c.diff?cvsroot=gcc&r1=1.148&r2=1.149