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| author | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-08-14 20:53:26 +0000 |
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| committer | sayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-08-14 20:53:26 +0000 |
| commit | a12ecaaad932850913429daf0f59addb4ddd2d2b (patch) | |
| tree | 9a1c805b0d9f0abdd6f5f935e7f53f0fb1091c08 /libjava/java | |
| parent | 080e0ef544623575bf3f2c7d209d5170bbe4573c (diff) | |
| download | ppe42-gcc-a12ecaaad932850913429daf0f59addb4ddd2d2b.tar.gz ppe42-gcc-a12ecaaad932850913429daf0f59addb4ddd2d2b.zip | |
* fold-const.c (negate_expr_p): MULT_EXPRs and RDIV_EXPRs are easy
to negate if either operand is easy to negate, if we don't care
about sign-dependent rounding.
(negate_expr): Make the logic to negate a REAL_CST explicit.
Attempt to negate a MULT_EXPR or RDIV_EXPR by negating an operand
that's easy to negate, if we don't honor sign-dependent rounding.
(fold <MULT_EXPR>): Optimize -A * B as A * -B if B is easy to
negate, and the symmetric A * -B as -A * B if A is easy to negate.
(fold <RDIV_EXPR>): Likewise, optimize -A/B and C/-D as A/-B and
-C/D if B and C are cheap to negate. Add an explicit rule to
optimize X/-1.0 as -X when we don't care about signaling NaNs.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@70455 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libjava/java')
0 files changed, 0 insertions, 0 deletions
