[gcc(refs/users/guojiufu/heads/personal-branch)] aarch64: Add support for unpacked sub [PR96366]

[Jiu Fu Guo]

https://gcc.gnu.org/g:9623f61b142174b87760c81f78928dd14af7cbc6

commit 9623f61b142174b87760c81f78928dd14af7cbc6
Author: Bu Le <bule1@huawei.com>
Date:   Mon Aug 3 16:38:46 2020 +0100

    aarch64: Add support for unpacked sub [PR96366]
    
    The test case bb-slp-20.c in the gcc testsuit will cause an
    ICE in the expand pass due to the lack of a pattern for
    subtraction of the VNx2SI mode. This patch solve this problem
    by adding support for unpacked sub.
    
    gcc/ChangeLog:
    
            * config/aarch64/aarch64-sve.md (sub<mode>3): Add support for
            unpacked vectors.

Diff:
---
 gcc/config/aarch64/aarch64-sve.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/gcc/config/aarch64/aarch64-sve.md b/gcc/config/aarch64/aarch64-sve.md
index 9d06bf719b5..182813c1c5c 100644
--- a/gcc/config/aarch64/aarch64-sve.md
+++ b/gcc/config/aarch64/aarch64-sve.md
@@ -3644,10 +3644,10 @@
 ;; -------------------------------------------------------------------------
 
 (define_insn "sub<mode>3"
-  [(set (match_operand:SVE_FULL_I 0 "register_operand" "=w, w, ?&w")
-	(minus:SVE_FULL_I
-	  (match_operand:SVE_FULL_I 1 "aarch64_sve_arith_operand" "w, vsa, vsa")
-	  (match_operand:SVE_FULL_I 2 "register_operand" "w, 0, w")))]
+  [(set (match_operand:SVE_I 0 "register_operand" "=w, w, ?&w")
+	(minus:SVE_I
+	  (match_operand:SVE_I 1 "aarch64_sve_arith_operand" "w, vsa, vsa")
+	  (match_operand:SVE_I 2 "register_operand" "w, 0, w")))]
   "TARGET_SVE"
   "@
    sub\t%0.<Vetype>, %1.<Vetype>, %2.<Vetype>