r141432 - in /trunk/gcc: ChangeLog convert.c re...

[jsm28 at gcc dot gnu dot org]

Author: jsm28
Date: Wed Oct 29 17:05:42 2008
New Revision: 141432

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=141432
Log:
	PR middle-end/36578
	* convert.c (convert_to_real): Do not optimize conversions of
	binary arithmetic operations between binary and decimal
	floating-point types.  Consider mode of target type in determining
	decimal type for arithmetic.  Unless
	flag_unsafe_math_optimizations, do not optimize binary conversions
	where this may change rounding behavior.
	* real.c (real_can_shorten_arithmetic): New.
	* real.h (real_can_shorten_arithmetic): Declare.

testsuite:
	* gcc.dg/dfp/convert-bfp-13.c, gcc.dg/dfp/convert-bfp-14.c,
	gcc.dg/dfp/convert-dfp-fold-2.c, gcc.target/i386/pr36578-1.c,
	gcc.target/i386/pr36578-2.c: New tests.

Added:
    trunk/gcc/testsuite/gcc.dg/dfp/convert-bfp-13.c
    trunk/gcc/testsuite/gcc.dg/dfp/convert-bfp-14.c
    trunk/gcc/testsuite/gcc.dg/dfp/convert-dfp-fold-2.c
    trunk/gcc/testsuite/gcc.target/i386/pr36578-1.c
    trunk/gcc/testsuite/gcc.target/i386/pr36578-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/convert.c
    trunk/gcc/real.c
    trunk/gcc/real.h
    trunk/gcc/testsuite/ChangeLog