c/7873: arm-linux-gcc fails when assigning address to a bit field

[Richard Earnshaw]

The following reply was made to PR c/7873; it has been noted by GNATS.

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"
     "
     {