[Bug tree-optimization/19060] [4.0 Regression] Miscompiling of if and "long long"

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-01-15 09:46 -------
Subject: Bug 19060

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	jakub@gcc.gnu.org	2005-01-15 09:46:10

Modified files:
	gcc            : ChangeLog fold-const.c tree-ssa-dom.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.c-torture/execute: 20050104-1.c 

Log message:
	PR tree-optimization/19060
	* tree-ssa-dom.c (extract_range_from_cond) <case LT_EXPR, GT_EXPR>:
	Return 0 if op1 <= TYPE_MIN_VALUE () resp. op1 >= TYPE_MAX_VALUE ().
	(simplify_cond_and_lookup_avail_expr): Add assert for dummy == 0
	and handle extract_range_from_cond returning false.
	* fold-const.c (fold): Optimize comparisons with min/max even for
	width > HOST_BITS_PER_WIDE_INT.
	
	* gcc.c-torture/execute/20050104-1.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7133&r2=2.7134
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/fold-const.c.diff?cvsroot=gcc&r1=1.492&r2=1.493
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-dom.c.diff?cvsroot=gcc&r1=2.81&r2=2.82
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4889&r2=1.4890
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.c-torture/execute/20050104-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19060