From 9b2cbf361e38ea1ad672c2b8c8cf1dda4f6f7d72 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@xry111.site>
Date: Mon, 2 Oct 2023 18:51:00 +0800
Subject: [PATCH 005/188] LoongArch: Replace UNSPEC_FCOPYSIGN with copysign RTL

When I added copysign support for LoongArch (r13-3702), we did not have
a copysign RTL insn, so I had to use UNSPEC to represent the copysign
instruction. Now the copysign RTX code has been added in r14-1586, so
this patch removes those UNSPECs, and it uses the native RTL copysign
insn.

Inspired by rs6000 patch "Cleanup: Replace UNSPEC_COPYSIGN with copysign
RTL" [1] from Michael Meissner.

[1]: https://gcc.gnu.org/pipermail/gcc-patches/2023-September/631701.html

gcc/ChangeLog:

	* config/loongarch/loongarch.md (UNSPEC_FCOPYSIGN): Delete.
	(copysign<mode>3): Use copysign RTL instead of UNSPEC.
---
 gcc/config/loongarch/loongarch.md | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md
index 63ff32e75..73e2cbe0b 100644
--- a/gcc/config/loongarch/loongarch.md
+++ b/gcc/config/loongarch/loongarch.md
@@ -37,7 +37,6 @@
   UNSPEC_FCLASS
   UNSPEC_FMAX
   UNSPEC_FMIN
-  UNSPEC_FCOPYSIGN
   UNSPEC_FTINT
   UNSPEC_FTINTRM
   UNSPEC_FTINTRP
@@ -1129,9 +1128,8 @@
 
 (define_insn "copysign<mode>3"
   [(set (match_operand:ANYF 0 "register_operand" "=f")
-	(unspec:ANYF [(match_operand:ANYF 1 "register_operand" "f")
-		      (match_operand:ANYF 2 "register_operand" "f")]
-		     UNSPEC_FCOPYSIGN))]
+	(copysign:ANYF (match_operand:ANYF 1 "register_operand" "f")
+		       (match_operand:ANYF 2 "register_operand" "f")))]
   "TARGET_HARD_FLOAT"
   "fcopysign.<fmt>\t%0,%1,%2"
   [(set_attr "type" "fcopysign")
-- 
2.43.0