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Re: [PATCH, i386]: Fix PR target/43766, x86 prefetch doesn't use complex memory addressing

From: Uros Bizjak <ubizjak at gmail dot com>
To: "H.J. Lu" <hjl dot tools at gmail dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Sun, 25 Apr 2010 19:52:45 +0200
Subject: Re: [PATCH, i386]: Fix PR target/43766, x86 prefetch doesn't use complex memory addressing
References: <l2o5787cf471004190532i49b4daefm27300eca1d0b53be@mail.gmail.com> <y2t6dc9ffc81004250907t31be7967rd6c628988525279d@mail.gmail.com>

On 04/25/2010 06:07 PM, H.J. Lu wrote:

>> 2010-04-19 ïUros Bizjak ï<ubizjak@gmail.com>
>>
>> ï ï ï ïPR target/43766
>> ï ï ï ï* gcc.target/i386/pr43766.c: New test.
>>
>> Patch was tested on x86_64-pc-linux-gnu {,-m32}. Patch was committed
>> to mainline.
>>
>> Uros.
>>
> 
> The new test failed with
> 
> 	pushl	%ebp
> 	prefetcht0	(%eax,%edx,4)
> 	movl	%esp, %ebp
> 	leave
> 	ret
> 
> since it scans "lea".  I checked this patch as an obvious fix,

Actually, it was done on purpose, we want to avoid leaq and leal.

Uros.

Follow-Ups:
- Re: [PATCH, i386]: Fix PR target/43766, x86 prefetch doesn't use complex memory addressing
  - From: H.J. Lu

References:
- [PATCH, i386]: Fix PR target/43766, x86 prefetch doesn't use complex memory addressing
  - From: Uros Bizjak
- Re: [PATCH, i386]: Fix PR target/43766, x86 prefetch doesn't use complex memory addressing
  - From: H.J. Lu

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