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Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode
From: |
Andi Kleen |
Subject: |
Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode |
Date: |
Mon, 19 Sep 2011 16:48:42 +0200 |
User-agent: |
Mutt/1.4.2.2i |
> You generally want CSE, yes? So you can't blame gcc for getting it
> wrong sometimes.
There are cases where CSE pessimizes the code, .e.g when it increases
memory pressure too much or caches something that is easier recomputed.
This is just another one.
BTW I checked again and the problem seems to be fixed in gcc 4.6, still
there in 4.5, at least in my example.
-Andi
- [Qemu-devel] [PATCH 6/8] tcg: Add bytecode generator for tcg interpreter, (continued)
- [Qemu-devel] [PATCH 6/8] tcg: Add bytecode generator for tcg interpreter, Stefan Weil, 2011/09/17
- [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Stefan Weil, 2011/09/17
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Andi Kleen, 2011/09/18
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Stefan Weil, 2011/09/18
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Paolo Bonzini, 2011/09/18
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Avi Kivity, 2011/09/18
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Andi Kleen, 2011/09/19
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Avi Kivity, 2011/09/19
- Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode,
Andi Kleen <=
Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Blue Swirl, 2011/09/18
Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Richard Henderson, 2011/09/19
Re: [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode, Stuart Brady, 2011/09/19
Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), Blue Swirl, 2011/09/18
- Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), malc, 2011/09/18
- Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), Blue Swirl, 2011/09/18
- Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), malc, 2011/09/18
- Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), Blue Swirl, 2011/09/18
- Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), malc, 2011/09/18
- Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine), Blue Swirl, 2011/09/18