[gcc r12-2301] AArch32: Correct sdot RTL on aarch32

[gcc r12-2301] AArch32: Correct sdot RTL on aarch32

[Tamar Christina]

https://gcc.gnu.org/g:c9165e2d58bb037793c1c93e1b5633a61f88db30

commit r12-2301-gc9165e2d58bb037793c1c93e1b5633a61f88db30
Author: Tamar Christina <tamar.christina@arm.com>
Date:   Wed Jul 14 15:22:37 2021 +0100

    AArch32: Correct sdot RTL on aarch32
    
    The RTL Generated from <sup>dot_prod<vsi2qi> is invalid as operand3 cannot be
    written to, it's a normal input.  For the expand it's just another operand
    but the caller does not expect it to be written to.
    
    gcc/ChangeLog:
    
            * config/arm/neon.md (<sup>dot_prod<vsi2qi>): Drop statements.

Diff:
---
 gcc/config/arm/neon.md | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/gcc/config/arm/neon.md b/gcc/config/arm/neon.md
index 8b0a396947c..764512166e9 100644
--- a/gcc/config/arm/neon.md
+++ b/gcc/config/arm/neon.md
@@ -2961,13 +2961,7 @@
 		     DOTPROD)
 		    (match_operand:VCVTI 3 "register_operand")))]
   "TARGET_DOTPROD"
-{
-  emit_insn (
-    gen_neon_<sup>dot<vsi2qi> (operands[3], operands[3], operands[1],
-				 operands[2]));
-  emit_insn (gen_rtx_SET (operands[0], operands[3]));
-  DONE;
-})
+)
 
 ;; Auto-vectorizer pattern for usdot
 (define_expand "usdot_prod<vsi2qi>"