On Thu, Dec 3, 2020 at 3:11 AM Jeff Law wrote:
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>
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> On 11/25/20 9:47 PM, Hongtao Liu wrote:
> > On Wed, Nov 25, 2020 at 7:37 PM Jakub Jelinek wrote:
> >> On Wed, Nov 25, 2020 at 07:32:44PM +0800, Hongtao Liu wrote:
> >>> Update patch:
> >>> 1. ix86_expand_special_args_builtin is used for exp
On 11/25/20 9:47 PM, Hongtao Liu wrote:
> On Wed, Nov 25, 2020 at 7:37 PM Jakub Jelinek wrote:
>> On Wed, Nov 25, 2020 at 07:32:44PM +0800, Hongtao Liu wrote:
>>> Update patch:
>>> 1. ix86_expand_special_args_builtin is used for expanding mask load
>>> intrinsics, this function will always co
On Wed, Nov 25, 2020 at 7:37 PM Jakub Jelinek wrote:
>
> On Wed, Nov 25, 2020 at 07:32:44PM +0800, Hongtao Liu wrote:
> > Update patch:
> > 1. ix86_expand_special_args_builtin is used for expanding mask load
> > intrinsics, this function will always convert the constant mask
> > operands into re
On Wed, Nov 25, 2020 at 07:32:44PM +0800, Hongtao Liu wrote:
> Update patch:
> 1. ix86_expand_special_args_builtin is used for expanding mask load
> intrinsics, this function will always convert the constant mask
> operands into reg. So for the situation of all-ones mask, keep this
> constant, an
On Tue, Nov 24, 2020 at 9:00 PM Jakub Jelinek wrote:
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> On Tue, Nov 24, 2020 at 10:36:49AM +0800, Hongtao Liu via Gcc-patches wrote:
> > > > * gcc.target/i386/pr97642-2.c: New test.
> > > So in the BZ Jakub asked for the all-ones mask case to be specially
> > > handled to emit a normal load
On Tue, Nov 24, 2020 at 10:36:49AM +0800, Hongtao Liu via Gcc-patches wrote:
> > > * gcc.target/i386/pr97642-2.c: New test.
> > So in the BZ Jakub asked for the all-ones mask case to be specially
> > handled to emit a normal load. I don't see where we're handling that.
> > ISTM that we'd wan
On Tue, Nov 24, 2020 at 4:27 AM Jeff Law wrote:
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>
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> On 11/4/20 2:19 AM, Hongtao Liu via Gcc-patches wrote:
> > Hi:
> > When programmers explicitly use mask loaded intrinsics, don't
> > transform the instruction to vpblend{b,w,d,q} since If mem_addr points
> > to a memory region with less tha
On 11/4/20 2:19 AM, Hongtao Liu via Gcc-patches wrote:
> Hi:
> When programmers explicitly use mask loaded intrinsics, don't
> transform the instruction to vpblend{b,w,d,q} since If mem_addr points
> to a memory region with less than whole vector size of accessible
> memory, the mask would pr
Hi:
When programmers explicitly use mask loaded intrinsics, don't
transform the instruction to vpblend{b,w,d,q} since If mem_addr points
to a memory region with less than whole vector size of accessible
memory, the mask would prevent reading the inaccessible bytes which
could avoid fault.
Boo
