On Fri, Jun 4, 2021 at 1:01 PM Hongtao Liu <crazy...@gmail.com> wrote:
>
> On Tue, Jun 1, 2021 at 6:17 PM Marc Glisse <marc.gli...@inria.fr> wrote:
> >
> > On Tue, 1 Jun 2021, Hongtao Liu via Gcc-patches wrote:
> >
> > > Hi:
> > > This patch is about to simplify (view_convert:type ~a) < 0 to
> > > (view_convert:type a) >= 0 when type is signed integer. Similar for
> > > (view_convert:type ~a) >= 0.
> > > Bootstrapped and regtested on x86_64-linux-gnu{-m32,}.
> > > Ok for the trunk?
> > >
> > > gcc/ChangeLog:
> > >
> > > PR middle-end/100738
> > > * match.pd ((view_convert ~a) < 0 --> (view_convert a) >= 0,
> > > (view_convert ~a) >= 0 --> (view_convert a) < 0): New GIMPLE
> > > simplification.
> >
> > We already have
> >
> > /* Fold ~X op C as X op' ~C, where op' is the swapped comparison. */
> > (for cmp (simple_comparison)
> > scmp (swapped_simple_comparison)
> > (simplify
> > (cmp (bit_not@2 @0) CONSTANT_CLASS_P@1)
> > (if (single_use (@2)
> > && (TREE_CODE (@1) == INTEGER_CST || TREE_CODE (@1) == VECTOR_CST))
> > (scmp @0 (bit_not @1)))))
> >
> > Would it make sense to try and generalize it a bit, say with
> >
> > (cmp (nop_convert1? (bit_not @0)) CONSTANT_CLASS_P)
> >
> > (scmp (view_convert:XXX @0) (bit_not @1))
> >
> Thanks for your advice, it looks great.
> And can I use *view_convert1?* instead of *nop_convert1?* here,
> because the original case is view_convert, and nop_convert would fail
> to simplify the case.
Here is updated patch
gcc/ChangeLog:
PR middle-end/100738
* match.pd (Fold ~X op C as X op' ~C): Extend GIMPLE
simplification to handle view_convert ~X.
gcc/testsuite/ChangeLog:
PR middle-end/100738
* g++.target/i386/avx2-pr100738-1.C: New test.
* g++.target/i386/sse4_1-pr100738-1.C: New test.
> > (I still believe that it is a bad idea that SSA_NAMEs are strongly typed,
> > encoding the type in operations would be more convenient, but I think the
> > time for that choice has long gone)
> >
> > --
> > Marc Glisse
>
>
>
> --
> BR,
> Hongtao
--
BR,
Hongtao
From 60308636a36fa7a5b96d115452a42be914ef19e7 Mon Sep 17 00:00:00 2001
From: liuhongt <hongtao....@intel.com>
Date: Thu, 27 May 2021 15:21:06 +0800
Subject: [PATCH] Extend gimple simplication of ((~X) op C --> (X) op' ~C) to
hanlde view_convert of ~X
gcc/ChangeLog:
PR middle-end/100738
* match.pd (Fold ~X op C as X op' ~C): Extend GIMPLE
simplification to handle view_convert ~X.
gcc/testsuite/ChangeLog:
PR middle-end/100738
* g++.target/i386/avx2-pr100738-1.C: New test.
* g++.target/i386/sse4_1-pr100738-1.C: New test.
---
gcc/match.pd | 5 +-
.../g++.target/i386/avx2-pr100738-1.C | 120 ++++++++++++++++++
.../g++.target/i386/sse4_1-pr100738-1.C | 120 ++++++++++++++++++
3 files changed, 243 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/g++.target/i386/avx2-pr100738-1.C
create mode 100644 gcc/testsuite/g++.target/i386/sse4_1-pr100738-1.C
diff --git a/gcc/match.pd b/gcc/match.pd
index cdb87636951..cbb76d67dc5 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -4144,10 +4144,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
(for cmp (simple_comparison)
scmp (swapped_simple_comparison)
(simplify
- (cmp (bit_not@2 @0) CONSTANT_CLASS_P@1)
+ (cmp (view_convert1? (bit_not@2 @0)) CONSTANT_CLASS_P@1)
+ (with {tree ttype = TREE_TYPE (@1);}
(if (single_use (@2)
&& (TREE_CODE (@1) == INTEGER_CST || TREE_CODE (@1) == VECTOR_CST))
- (scmp @0 (bit_not @1)))))
+ (scmp (view_convert:ttype @0) (bit_not @1))))))
(for cmp (simple_comparison)
/* Fold (double)float1 CMP (double)float2 into float1 CMP float2. */
diff --git a/gcc/testsuite/g++.target/i386/avx2-pr100738-1.C b/gcc/testsuite/g++.target/i386/avx2-pr100738-1.C
new file mode 100644
index 00000000000..80fdad3e5f0
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/avx2-pr100738-1.C
@@ -0,0 +1,120 @@
+/* { dg-do compile } */
+/* { dg-options "-mavx2 -std=c++14 -O2 -mno-avx512f -mno-xop" } */
+/* { dg-final { scan-assembler-not "pxor" } } */
+/* { dg-final { scan-assembler-not "pcmpgt\[bdq]" } } */
+/* { dg-final { scan-assembler-times "pblendvb" 6 } } */
+/* { dg-final { scan-assembler-times "blendvps" 6 } } */
+/* { dg-final { scan-assembler-times "blendvpd" 6 } } */
+
+typedef char v32qi __attribute__ ((vector_size (32)));
+typedef short v16hi __attribute__ ((vector_size (32)));
+typedef int v8si __attribute__ ((vector_size (32)));
+typedef long long v4di __attribute__ ((vector_size (32)));
+
+v8si
+f1 (v32qi a, v8si b, v8si c)
+{
+ return ((v8si)~a) < 0 ? b : c;
+}
+
+v4di
+f2 (v32qi a, v4di b, v4di c)
+{
+ return ((v4di)~a) < 0 ? b : c;
+}
+
+v32qi
+f3 (v16hi a, v32qi b, v32qi c)
+{
+ return ((v32qi)~a) < 0 ? b : c;
+}
+
+v8si
+f4 (v16hi a, v8si b, v8si c)
+{
+ return ((v8si)~a) < 0 ? b : c;
+}
+
+v4di
+f5 (v16hi a, v4di b, v4di c)
+{
+ return ((v4di)~a) < 0 ? b : c;
+}
+
+v32qi
+f6 (v8si a, v32qi b, v32qi c)
+{
+ return ((v32qi)~a) < 0 ? b : c;
+}
+
+v4di
+f7 (v8si a, v4di b, v4di c)
+{
+ return ((v4di)~a) < 0 ? b : c;
+}
+
+v32qi
+f8 (v4di a, v32qi b, v32qi c)
+{
+ return ((v32qi)~a) < 0 ? b : c;
+}
+
+v8si
+f9 (v4di a, v8si b, v8si c)
+{
+ return ((v8si)~a) < 0 ? b : c;
+}
+
+v8si
+f10 (v32qi a, v8si b, v8si c)
+{
+ return ((v8si)~a) >= 0 ? b : c;
+}
+
+v4di
+f11 (v32qi a, v4di b, v4di c)
+{
+ return ((v4di)~a) >= 0 ? b : c;
+}
+
+v32qi
+f12 (v16hi a, v32qi b, v32qi c)
+{
+ return ((v32qi)~a) >= 0 ? b : c;
+}
+
+v8si
+f13 (v16hi a, v8si b, v8si c)
+{
+ return ((v8si)~a) >= 0 ? b : c;
+}
+
+v4di
+f14 (v16hi a, v4di b, v4di c)
+{
+ return ((v4di)~a) >= 0 ? b : c;
+}
+
+v32qi
+f15 (v8si a, v32qi b, v32qi c)
+{
+ return ((v32qi)~a) >= 0 ? b : c;
+}
+
+v4di
+f16 (v8si a, v4di b, v4di c)
+{
+ return ((v4di)~a) >= 0 ? b : c;
+}
+
+v32qi
+f17 (v4di a, v32qi b, v32qi c)
+{
+ return ((v32qi)~a) >= 0 ? b : c;
+}
+
+v8si
+f18 (v4di a, v8si b, v8si c)
+{
+ return ((v8si)~a) >= 0 ? b : c;
+}
diff --git a/gcc/testsuite/g++.target/i386/sse4_1-pr100738-1.C b/gcc/testsuite/g++.target/i386/sse4_1-pr100738-1.C
new file mode 100644
index 00000000000..d3454c264cd
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/sse4_1-pr100738-1.C
@@ -0,0 +1,120 @@
+/* { dg-do compile } */
+/* { dg-options "-msse4 -std=c++14 -mno-avx2 -O2 -mno-xop" } */
+/* { dg-final { scan-assembler-not "pxor" } } */
+/* { dg-final { scan-assembler-not "pcmpgt\[bdq]" } } */
+/* { dg-final { scan-assembler-times "pblendvb" 6 } } */
+/* { dg-final { scan-assembler-times "blendvps" 6 } } */
+/* { dg-final { scan-assembler-times "blendvpd" 6 } } */
+
+typedef char v16qi __attribute__ ((vector_size (16)));
+typedef short v8hi __attribute__ ((vector_size (16)));
+typedef int v4si __attribute__ ((vector_size (16)));
+typedef long long v2di __attribute__ ((vector_size (16)));
+
+v4si
+f1 (v16qi a, v4si b, v4si c)
+{
+ return ((v4si)~a) < 0 ? b : c;
+}
+
+v2di
+f2 (v16qi a, v2di b, v2di c)
+{
+ return ((v2di)~a) < 0 ? b : c;
+}
+
+v16qi
+f3 (v8hi a, v16qi b, v16qi c)
+{
+ return ((v16qi)~a) < 0 ? b : c;
+}
+
+v4si
+f4 (v8hi a, v4si b, v4si c)
+{
+ return ((v4si)~a) < 0 ? b : c;
+}
+
+v2di
+f5 (v8hi a, v2di b, v2di c)
+{
+ return ((v2di)~a) < 0 ? b : c;
+}
+
+v16qi
+f6 (v4si a, v16qi b, v16qi c)
+{
+ return ((v16qi)~a) < 0 ? b : c;
+}
+
+v2di
+f7 (v4si a, v2di b, v2di c)
+{
+ return ((v2di)~a) < 0 ? b : c;
+}
+
+v16qi
+f8 (v2di a, v16qi b, v16qi c)
+{
+ return ((v16qi)~a) < 0 ? b : c;
+}
+
+v4si
+f9 (v2di a, v4si b, v4si c)
+{
+ return ((v4si)~a) < 0 ? b : c;
+}
+
+v4si
+f10 (v16qi a, v4si b, v4si c)
+{
+ return ((v4si)~a) >= 0 ? b : c;
+}
+
+v2di
+f11 (v16qi a, v2di b, v2di c)
+{
+ return ((v2di)~a) >= 0 ? b : c;
+}
+
+v16qi
+f12 (v8hi a, v16qi b, v16qi c)
+{
+ return ((v16qi)~a) >= 0 ? b : c;
+}
+
+v4si
+f13 (v8hi a, v4si b, v4si c)
+{
+ return ((v4si)~a) >= 0 ? b : c;
+}
+
+v2di
+f14 (v8hi a, v2di b, v2di c)
+{
+ return ((v2di)~a) >= 0 ? b : c;
+}
+
+v16qi
+f15 (v4si a, v16qi b, v16qi c)
+{
+ return ((v16qi)~a) >= 0 ? b : c;
+}
+
+v2di
+f16 (v4si a, v2di b, v2di c)
+{
+ return ((v2di)~a) >= 0 ? b : c;
+}
+
+v16qi
+f17 (v2di a, v16qi b, v16qi c)
+{
+ return ((v16qi)~a) >= 0 ? b : c;
+}
+
+v4si
+f18 (v2di a, v4si b, v4si c)
+{
+ return ((v4si)~a) >= 0 ? b : c;
+}
--
2.18.1
