-Original Message-
From: Jeff Law [mailto:l...@redhat.com]
Sent: 22 November 2013 16:58
To: Bingfeng Mei; Andrew Pinski
Cc: gcc@gcc.gnu.org
Subject: Re: Jump threading in tree dom pass prevents if-conversion
following vectorization
On 11/22/13 04:03, Bingfeng Mei wrote:
Well, in your
]
Sent: 21 November 2013 21:26
To: Bingfeng Mei
Cc: gcc@gcc.gnu.org
Subject: Re: Jump threading in tree dom pass prevents if-conversion following
vectorization
On Thu, Nov 21, 2013 at 7:11 AM, Bingfeng Mei b...@broadcom.com wrote:
Hi,
I am doing some investigation on loops can be vectorized
On Fri, Nov 22, 2013 at 11:03:22AM +, Bingfeng Mei wrote:
Well, in your modified example, it is still due to jump threading that produce
code of bad control flow that cannot be if-converted and vectorized, though in
tree-vrp pass this time.
Try this
~/install-4.8/bin/gcc
[mailto:james.greenha...@arm.com]
Sent: 22 November 2013 11:50
To: Bingfeng Mei
Cc: Andrew Pinski; gcc@gcc.gnu.org
Subject: Re: Jump threading in tree dom pass prevents if-conversion following
vectorization
On Fri, Nov 22, 2013 at 11:03:22AM +, Bingfeng Mei wrote:
Well, in your modified example
threading in tree dom pass prevents if-conversion
following vectorization
On Thu, Nov 21, 2013 at 7:11 AM, Bingfeng Mei b...@broadcom.com wrote:
Hi,
I am doing some investigation on loops can be vectorized
by LLVM, but not GCC. One example is loop that contains
more than one if-else
On 11/22/13 04:03, Bingfeng Mei wrote:
Well, in your modified example, it is still due to jump threading that produce
code of bad control flow that cannot be if-converted and vectorized, though in
tree-vrp pass this time.
Try this
~/install-4.8/bin/gcc vect-ifconv-2.c -O2
.
Bingfeng
-Original Message-
From: Jeff Law [mailto:l...@redhat.com]
Sent: 22 November 2013 16:58
To: Bingfeng Mei; Andrew Pinski
Cc: gcc@gcc.gnu.org
Subject: Re: Jump threading in tree dom pass prevents if-conversion following
vectorization
On 11/22/13 04:03, Bingfeng Mei wrote:
Well
On 11/22/13 10:13, Bingfeng Mei wrote:
So if we are about to fix this in if-conversion, we need to do both in tree rtl
as both ifcvt ce passes cannot handle it.
I am still not convinced jump threading is good for target with predicated
execution (assuming no fix for if-conversion). I am
be fixed without disabling jump threading.
Bingfeng
-Original Message-
From: Jeff Law [mailto:l...@redhat.com]
Sent: 22 November 2013 17:17
To: Bingfeng Mei; Andrew Pinski; Richard Biener
Cc: gcc@gcc.gnu.org
Subject: Re: Jump threading in tree dom pass prevents if-conversion following
[mailto:l...@redhat.com]
Sent: 22 November 2013 17:17
To: Bingfeng Mei; Andrew Pinski; Richard Biener
Cc: gcc@gcc.gnu.org
Subject: Re: Jump threading in tree dom pass prevents if-conversion following
vectorization
On 11/22/13 10:13, Bingfeng Mei wrote:
So if we are about to fix
On Fri, Nov 22, 2013 at 6:16 PM, Jeff Law wrote:
I am still not convinced jump threading is good for target with predicated
execution (assuming no fix for if-conversion). I am doing benchmarking on
our target now.
Try disabling only jump threading of back edges, loop latches, and
jump
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