From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gleb Natapov <gleb@redhat.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
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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>
To: Paolo Bonzini <pbonzini@redhat.com>
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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.