This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug rtl-optimization/56494] [4.8 Regression] ICE in simplify_truncation, at simplify-rtx.c:619
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 05 Mar 2013 06:04:23 +0000
- Subject: [Bug rtl-optimization/56494] [4.8 Regression] ICE in simplify_truncation, at simplify-rtx.c:619
- Auto-submitted: auto-generated
- References: <bug-56494-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56494
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-03-05 06:04:23 UTC ---
Author: jakub
Date: Tue Mar 5 06:04:14 2013
New Revision: 196451
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196451
Log:
PR rtl-optimization/56494
* simplify-rtx.c (simplify_truncation): If C is narrower than A,
optimize (truncate:A (subreg:B (truncate:C X) 0)) into
(subreg:A (truncate:C X) 0) instead of (truncate:A X).
* gcc.dg/pr56494.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr56494.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/simplify-rtx.c
trunk/gcc/testsuite/ChangeLog