Re: c/2898: Illegal function return in ARM code when compiling with-mthumb-interwork -O2

Re: c/2898: Illegal function return in ARM code when compiling with-mthumb-interwork -O2

[Thomas Rauscher]

The following reply was made to PR c/2898; it has been noted by GNATS.

From: Thomas Rauscher <trauscher@loytec.com>
To: Philip Blundell <philb@gnu.org>
Cc: <trauscher@loytec.com>, <gcc-gnats@gcc.gnu.org>, <gcc-patches@gcc.gnu.org>
Subject: Re: c/2898: Illegal function return in ARM code when compiling with
 -mthumb-interwork -O2 
Date: Wed, 23 May 2001 18:54:44 +0200 (CEST)

 On Tue, 22 May 2001, Philip Blundell wrote:
 
 > >When compiling for an ARM target with -mthumb-interwork and -02 or higher
 > >optimization,
 > >the compiler does not correctly return with the BX instruction but loads
 > >the PC directly. Thus, the function cannot be called from THUMB code
 > >safely.
 >
 > Thanks for your bug report.
 >
 > I think the patch below should fix this problem (which, incidentally, is a
 > regression from 2.95).
 >
 > p.
 >
 
 The patch appearently solved the problem. I didn't get the compiler to
 produce illegal code any longer.
 
 Thanks,
 Thomas