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Re: [Bug target/11052] [3.3 regression] [arm] ICE (segfault) compiling xfree86

From: Richard Earnshaw <rearnsha at arm dot com>
To: Richard Henderson <rth at redhat dot com>, gcc-patches at gcc dot gnu dot org
Cc: Richard dot Earnshaw at arm dot com, gcc-bugzilla at gcc dot gnu dot org, dhazeghi at yahoo dot com
Date: Fri, 06 Jun 2003 18:22:37 +0100
Subject: Re: [Bug target/11052] [3.3 regression] [arm] ICE (segfault) compiling xfree86
Organization: ARM Ltd.
Reply-to: Richard dot Earnshaw at arm dot com

> On Tue, Jun 03, 2003 at 05:52:16PM +0100, Richard Earnshaw wrote:
> > Is it guaranteed that noce_emit_move_insn will emit exactly one insn?
> 
> No.
> 
> 

In that case, and given that on further review of the source it becomes 
apparent that two of the three variants handled by noce_process_if_block 
lead to invalid code if X has side effects, I think it's easier to just 
disable this optimization for that case.

So fixed with:

2003-06-06  Richard Earnshaw  <rearnsha@arm.com>

	PR target/11052
	* ifcvt.c (noce_process_if_block): Fail if the destination has
	side-effects.

2003-06-06  Richard Earnshaw  <rearnsha@arm.com>

	gcc.c-torture/execute/20030606-1.c: New.

Attachment: noce_sideeffect.patch
Description: noce_sideeffect.patch

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