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Branch bug in gas on MIPS

To: linux-mips@linux-mips.org, binutils@sources.redhat.com
Subject: Branch bug in gas on MIPS
From: Ralf Baechle <ralf@linux-mips.org>
Date: Tue, 17 Aug 2004 18:01:10 +0200
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.4.1i
Below little test case demonstrates a gas bug that results in swapping
of the two branch instructions and use of bogus destination addresses
for the first of the two branches.

[ralf@lappi tmp]$ cat s.s
1:      beqzl   $2, 1b
        beq     $4, $5, 1b
[ralf@lappi tmp]$ mips-linux-as -mips2 -o s.o s.s
[ralf@lappi tmp]$ mips-linux-objdump -d s.o
 
s.o:     file format elf32-tradbigmips
 
Disassembly of section .text:
 
00000000 <.text>:
   0:   1085ffff        beq     a0,a1,0x0
   4:   00000000        nop
   8:   50400000        beqzl   v0,0xc
   c:   00000000        nop

Have a nice day ;-)

  Ralf

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