From 778ac63fe244b63380bd3b2dee4d20ff27332bce Mon Sep 17 00:00:00 2001
From: Jonathan Wright <jonathan.wright@arm.com>
Date: Fri, 14 May 2021 14:49:47 +0100
Subject: [PATCH] aarch64: Relax aarch64_sqxtun2<mode> RTL pattern
Use UNSPEC_SQXTUN instead of UNSPEC_SQXTUN2 in aarch64_sqxtun2<mode>
patterns. This allows for more more aggressive combinations and
ultimately better code generation. The now redundant UNSPEC_SQXTUN2
is removed.
gcc/ChangeLog:
2021-05-14 Jonathn Wright <jonathan.wright@arm.com>
* config/aarch64/aarch64-simd.md: Use UNSPEC_SQXTUN instead
of UNSPEC_SQXTUN2.
* config/aarch64/iterators.md: Remove UNSPEC_SQXTUN2.
---
gcc/config/aarch64/aarch64-simd.md | 6 +++---
gcc/config/aarch64/iterators.md | 1 -
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index 5473d61aaa9c..79523093ec32 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -4859,7 +4859,7 @@
(vec_concat:<VNARROWQ2>
(match_operand:<VNARROWQ> 1 "register_operand" "0")
(unspec:<VNARROWQ>
- [(match_operand:VQN 2 "register_operand" "w")] UNSPEC_SQXTUN2)))]
+ [(match_operand:VQN 2 "register_operand" "w")] UNSPEC_SQXTUN)))]
"TARGET_SIMD && !BYTES_BIG_ENDIAN"
"sqxtun2\\t%0.<V2ntype>, %2.<Vtype>"
[(set_attr "type" "neon_sat_shift_imm_narrow_q")]
@@ -4869,7 +4869,7 @@
[(set (match_operand:<VNARROWQ2> 0 "register_operand" "=w")
(vec_concat:<VNARROWQ2>
(unspec:<VNARROWQ>
- [(match_operand:VQN 2 "register_operand" "w")] UNSPEC_SQXTUN2)
+ [(match_operand:VQN 2 "register_operand" "w")] UNSPEC_SQXTUN)
(match_operand:<VNARROWQ> 1 "register_operand" "0")))]
"TARGET_SIMD && BYTES_BIG_ENDIAN"
"sqxtun2\\t%0.<V2ntype>, %2.<Vtype>"
@@ -4880,7 +4880,7 @@
[(match_operand:<VNARROWQ2> 0 "register_operand")
(match_operand:<VNARROWQ> 1 "register_operand")
(unspec:<VNARROWQ>
- [(match_operand:VQN 2 "register_operand")] UNSPEC_SQXTUN2)]
+ [(match_operand:VQN 2 "register_operand")] UNSPEC_SQXTUN)]
"TARGET_SIMD"
{
if (BYTES_BIG_ENDIAN)
diff --git a/gcc/config/aarch64/iterators.md b/gcc/config/aarch64/iterators.md
index 29ce6690e9dc..0ec93b0ff6a0 100644
--- a/gcc/config/aarch64/iterators.md
+++ b/gcc/config/aarch64/iterators.md
@@ -521,7 +521,6 @@
UNSPEC_USQADD ; Used in aarch64-simd.md.
UNSPEC_SUQADD ; Used in aarch64-simd.md.
UNSPEC_SQXTUN ; Used in aarch64-simd.md.
- UNSPEC_SQXTUN2 ; Used in aarch64-simd.md.
UNSPEC_SSRA ; Used in aarch64-simd.md.
UNSPEC_USRA ; Used in aarch64-simd.md.
UNSPEC_SRSRA ; Used in aarch64-simd.md.
--
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