[Bug middle-end/18424] [3.4/4.0 Regression] ~6x+ performance regression, constant trees not being computed.

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-12-11 01:49 -------
Subject: Bug 18424

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2004-12-11 01:49:06

Modified files:
	gcc            : ChangeLog dojump.c 

Log message:
	PR target/18002
	PR middle-end/18424
	* dojump.c (do_jump): When attempting to reverse the effects of
	fold_single_bit_test, we need to STRIP_NOPS and narrowing type
	conversions, and handle BIT_XOR_EXPR that's used to invert the
	sense of the single bit test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6778&r2=2.6779
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/dojump.c.diff?cvsroot=gcc&r1=1.32&r2=1.33



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18424