------- Comment #5 from rguenth at gcc dot gnu dot org 2008-04-01 23:00 ------- Subject: Bug 35787
Author: rguenth Date: Tue Apr 1 22:59:21 2008 New Revision: 133808 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=133808 Log: 2008-04-02 Richard Guenther <[EMAIL PROTECTED]> * tree-vrp.c (extract_range_from_assert): Make sure to not produce range min/max with TREE_OVERFOW set. If merging a anti-range and a range keep the anti-range if the range covers all values of the type. (register_edge_assert_for_2): Only allow sign-changing conversions in detecting canonical range checks. Also register an assert for the unsigned name if useful. PR tree-optimization/35787 * tree-vrp.c (vrp_val_max): New function. (vrp_val_min): Likewise. (vrp_val_is_max): Move earlier, use vrp_val_{min,max}. (vrp_val_is_min): Likewise. (supports_overflow_infinity): Use vrp_val_{min,max}. (negative_overflow_infinity): Likewise. (positive_overflow_infinity): Likewise. (is_negative_overflow_infinity): Use vrp_val_is_{min,max}. (is_positive_overflow_infinity): Likewise. (is_overflow_infinity): Likewise. (avoid_overflow_infinity): Use vrp_val_{min,max} and vrp_val_is_{min,max}. (set_and_canonicalize_value_range): Canonicalize anti-ranges to ranges if possible. Avoid empty ranges. * gcc.dg/tree-ssa/vrp38.c: New testcase. * gcc.dg/tree-ssa/vrp39.c: Likewise. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp38.c trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp39.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vrp.c -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35787
