From: Gleb Natapov <gleb@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Anthony Liguori <anthony@codemonkey.ws>,
QEMU Developers <qemu-devel@nongnu.org>,
kvm-devel <kvm@vger.kernel.org>,
Patch Tracking <patches@linaro.org>,
Andreas Tobler <andreast@freebsd.org>,
Anthony Liguori <aliguori@amazon.com>
Subject: Re: [PATCH for-1.7] target-i386: Fix build by providing stub kvm_arch_get_supported_cpuid()
Date: Tue, 12 Nov 2013 16:09:36 +0200 [thread overview]
Message-ID: <20131112140935.GD2008@redhat.com> (raw)
In-Reply-To: <528233DD.6020306@redhat.com>
On Tue, Nov 12, 2013 at 02:57:49PM +0100, Paolo Bonzini wrote:
> Il 12/11/2013 14:23, Gleb Natapov ha scritto:
> >> If -O0 does not do that, let's move debug builds to -O1.
> >
> > Why not enable dce with -fdce?
>
> First, because clang doesn't have fine-tuned optimization options (at
> least I couldn't find them and -fdce doesn't work).
>
-O1 then for clang.
> Second, because most optimization options are no-ops at -O0 (try "-fdce
> -fdump-tree-all" with GCC.
>
Strange. Is this by design? We can do -O1 and bunch of "-fno-" to
disable most of optimizations -O1 enables, but this is ugly.
--
Gleb.
WARNING: multiple messages have this Message-ID (diff)
From: Gleb Natapov <gleb@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Anthony Liguori <aliguori@amazon.com>,
kvm-devel <kvm@vger.kernel.org>,
Patch Tracking <patches@linaro.org>,
QEMU Developers <qemu-devel@nongnu.org>,
Andreas Tobler <andreast@freebsd.org>,
Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: [Qemu-devel] [PATCH for-1.7] target-i386: Fix build by providing stub kvm_arch_get_supported_cpuid()
Date: Tue, 12 Nov 2013 16:09:36 +0200 [thread overview]
Message-ID: <20131112140935.GD2008@redhat.com> (raw)
In-Reply-To: <528233DD.6020306@redhat.com>
On Tue, Nov 12, 2013 at 02:57:49PM +0100, Paolo Bonzini wrote:
> Il 12/11/2013 14:23, Gleb Natapov ha scritto:
> >> If -O0 does not do that, let's move debug builds to -O1.
> >
> > Why not enable dce with -fdce?
>
> First, because clang doesn't have fine-tuned optimization options (at
> least I couldn't find them and -fdce doesn't work).
>
-O1 then for clang.
> Second, because most optimization options are no-ops at -O0 (try "-fdce
> -fdump-tree-all" with GCC.
>
Strange. Is this by design? We can do -O1 and bunch of "-fno-" to
disable most of optimizations -O1 enables, but this is ugly.
--
Gleb.
next prev parent reply other threads:[~2013-11-12 14:09 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-11 21:22 [PATCH for-1.7] target-i386: Fix build by providing stub kvm_arch_get_supported_cpuid() Peter Maydell
2013-11-11 21:22 ` [Qemu-devel] " Peter Maydell
2013-11-11 21:28 ` Andreas Tobler
2013-11-11 21:28 ` [Qemu-devel] " Andreas Tobler
2013-11-11 22:19 ` Paolo Bonzini
2013-11-11 22:19 ` [Qemu-devel] " Paolo Bonzini
2013-11-11 22:38 ` Peter Maydell
2013-11-11 22:38 ` [Qemu-devel] " Peter Maydell
2013-11-11 23:11 ` Paolo Bonzini
2013-11-11 23:11 ` [Qemu-devel] " Paolo Bonzini
2013-11-11 23:21 ` Anthony Liguori
2013-11-11 23:21 ` [Qemu-devel] " Anthony Liguori
2013-11-12 7:09 ` Paolo Bonzini
2013-11-12 7:09 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 11:07 ` Peter Maydell
2013-11-12 11:07 ` [Qemu-devel] " Peter Maydell
2013-11-12 12:09 ` Paolo Bonzini
2013-11-12 12:09 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 12:16 ` Peter Maydell
2013-11-12 12:16 ` [Qemu-devel] " Peter Maydell
2013-11-12 13:12 ` Paolo Bonzini
2013-11-12 13:12 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 13:21 ` Peter Maydell
2013-11-12 13:21 ` [Qemu-devel] " Peter Maydell
2013-11-12 13:26 ` Gleb Natapov
2013-11-12 13:26 ` [Qemu-devel] " Gleb Natapov
2013-11-12 13:23 ` Gleb Natapov
2013-11-12 13:23 ` [Qemu-devel] " Gleb Natapov
2013-11-12 13:57 ` Paolo Bonzini
2013-11-12 13:57 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 14:09 ` Gleb Natapov [this message]
2013-11-12 14:09 ` Gleb Natapov
2013-11-12 14:14 ` Peter Maydell
2013-11-12 14:14 ` [Qemu-devel] " Peter Maydell
2013-11-12 14:57 ` Paolo Bonzini
2013-11-12 14:57 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 15:13 ` Peter Maydell
2013-11-12 15:13 ` [Qemu-devel] " Peter Maydell
2013-11-12 15:21 ` Paolo Bonzini
2013-11-12 15:21 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 15:32 ` Peter Maydell
2013-11-12 15:32 ` [Qemu-devel] " Peter Maydell
2013-11-12 15:58 ` Paolo Bonzini
2013-11-12 15:58 ` [Qemu-devel] " Paolo Bonzini
2013-11-12 16:08 ` Peter Maydell
2013-11-12 16:08 ` [Qemu-devel] " Peter Maydell
2013-11-12 17:04 ` Anthony Liguori
2013-11-12 17:04 ` [Qemu-devel] " Anthony Liguori
2013-11-12 17:20 ` Peter Maydell
2013-11-12 17:20 ` [Qemu-devel] " Peter Maydell
2013-11-12 18:54 ` Richard Henderson
2013-11-12 18:54 ` Richard Henderson
2013-11-12 18:57 ` Peter Maydell
2013-11-12 18:57 ` Peter Maydell
2013-11-12 19:15 ` Stefan Weil
2013-11-12 19:15 ` [Qemu-devel] " Stefan Weil
2013-11-12 22:53 ` Paolo Bonzini
2013-11-12 22:53 ` Paolo Bonzini
2013-11-13 2:27 ` Richard Henderson
2013-11-13 2:27 ` Richard Henderson
2013-11-13 7:25 ` Paolo Bonzini
2013-11-13 7:25 ` Paolo Bonzini
2013-11-13 22:23 ` Peter Maydell
2013-11-13 22:23 ` Peter Maydell
2013-11-13 7:26 ` Gleb Natapov
2013-11-13 7:26 ` Gleb Natapov
2013-11-12 14:01 ` Peter Maydell
2013-11-12 14:01 ` [Qemu-devel] " Peter Maydell
2013-11-11 23:23 ` Peter Maydell
2013-11-11 23:23 ` [Qemu-devel] " Peter Maydell
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