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[Bug rtl-optimization/55717] [4.8 Regression] ICE in form_sum, at reload.c:5400
- 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, 18 Dec 2012 10:50:51 +0000
- Subject: [Bug rtl-optimization/55717] [4.8 Regression] ICE in form_sum, at reload.c:5400
- Auto-submitted: auto-generated
- References: <bug-55717-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55717
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-18 10:50:51 UTC ---
Author: jakub
Date: Tue Dec 18 10:50:47 2012
New Revision: 194575
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194575
Log:
PR debug/55717
* rtlhooks-def.h (RTL_HOOKS_GEN_LOWPART_NO_EMIT): Define to
gen_lowpart_if_possible.
(gen_lowpart_no_emit_general): Remove prototype.
* rtlhooks.c (gen_lowpart_no_emit_general): Removed.
* simplify-rtx.c (simplify_unary_operation_1,
simplify_binary_operation_1): Continue simplifying if
rtl_hooks.gen_lowpart_no_emit returns NULL_RTX.
* dwarf2out.c (mem_loc_descriptor) <case TRUNCATE>: Handle
truncation like lowpart SUBREG.
* testsuite/g++.dg/opt/pr55717.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr55717.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/rtlhooks-def.h
trunk/gcc/rtlhooks.c
trunk/gcc/simplify-rtx.c
trunk/gcc/testsuite/ChangeLog