GCC Bugzilla – Bug 7873
arm-linux-gcc fails when assigning address to a bit field
Last modified: 2003-07-25 17:33:46 UTC
./arm-linux-gcc -c xxx2.c xxx2.c: In function `foo': xxx2.c:13: unrecognizable insn: (insn 13 11 15 (set (reg:SI 34) (ashift:SI (symbol_ref:SI ("x0")) (const_int 12 [0xc]))) -1 (nil) (nil)) xxx2.c:13: Internal compiler error in extract_insn, at recog.c:2148 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions. Release: arm-linux-gcc v.3.2 Environment: System: Linux tula 2.4.9 #1 SMP Fri Oct 26 14:37:41 EDT 2001 i686 unknown Architecture: i686 host: i386-pc-linux-gnu build: i386-pc-linux-gnu target: i386-pc-linux-gnu configured with: arm-linux set How-To-Repeat: /** Run "arm-linux-gcc -c" on this preprocessed segment : **/ unsigned int x0 = 0; typedef struct { unsigned int field1 : 20; unsigned int field2 : 12; } XX; static XX yy; static void foo (void) { yy.field1 = (unsigned int ) (&x0); }
Fix: You tell me :)
Responsible-Changed-From-To: unassigned->rearnsha Responsible-Changed-Why: .
State-Changed-From-To: open->closed State-Changed-Why: Fixed
From: Richard Earnshaw <rearnsha@cambridge.arm.com> To: alex.zatsman@analog.com Cc: gcc-gnats@gcc.gnu.org, debian-gcc@lists.debian.org, Richard.Earnshaw@arm.com Subject: Re: c/7873: arm-linux-gcc fails when assigning address to a bit field Date: Tue, 10 Sep 2002 10:50:50 +0100 > >How-To-Repeat: > > /** Run "arm-linux-gcc -c" on this preprocessed segment : **/ > > > unsigned int x0 = 0; > > typedef struct { > unsigned int field1 : 20; > unsigned int field2 : 12; > } XX; > > static XX yy; > > static void foo (void) > { > yy.field1 = (unsigned int ) (&x0); > } Please try the following patch: 2002-09-10 Richard Earnshaw <rearnsha@arm.com> * arm.md (insv): Use reg_or_int_operand for operand[3]. Index: arm.md =================================================================== RCS file: /cvs/gcc/gcc/gcc/config/arm/arm.md,v retrieving revision 1.104 diff -p -r1.104 arm.md *** arm.md 29 Jul 2002 12:41:46 -0000 1.104 --- arm.md 10 Sep 2002 09:44:07 -0000 *************** *** 1866,1872 **** [(set (zero_extract:SI (match_operand:SI 0 "s_register_operand" "") (match_operand:SI 1 "general_operand" "") (match_operand:SI 2 "general_operand" "")) ! (match_operand:SI 3 "nonmemory_operand" ""))] "TARGET_ARM" " { --- 1866,1872 ---- [(set (zero_extract:SI (match_operand:SI 0 "s_register_operand" "") (match_operand:SI 1 "general_operand" "") (match_operand:SI 2 "general_operand" "")) ! (match_operand:SI 3 "reg_or_int_operand" ""))] "TARGET_ARM" " {
From: rearnsha@gcc.gnu.org To: gcc-gnats@gcc.gnu.org Cc: Subject: c/7873 Date: 10 Sep 2002 15:39:45 -0000 CVSROOT: /cvs/gcc Module name: egcs Changes by: rearnsha@gcc.gnu.org 2002-09-10 08:39:44 Modified files: gcc : ChangeLog gcc/config/arm : arm.md Log message: PR c/7873 * arm.md (insv): Use reg_or_int_operand for operand[3]. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/ChangeLog.diff?cvsroot=gcc&r1=1.15377&r2=1.15378 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/egcs/gcc/config/arm/arm.md.diff?cvsroot=gcc&r1=1.105&r2=1.106