[gcc r13-1168] xtensa: Fix RTL insn cost estimation about relaxed MOVI instructions

[gcc r13-1168] xtensa: Fix RTL insn cost estimation about relaxed MOVI instructions

[Max Filippov]

https://gcc.gnu.org/g:46880cd8be7c307f147a8785ac8f58e04a35d34e

commit r13-1168-g46880cd8be7c307f147a8785ac8f58e04a35d34e
Author: Takayuki 'January June' Suwa <jjsuwa_sys3175@yahoo.co.jp>
Date:   Mon Jun 20 04:13:56 2022 +0900

    xtensa: Fix RTL insn cost estimation about relaxed MOVI instructions
    
    These instructions will all be converted to L32R ones with litpool entries
    by the assembler.
    
    gcc/ChangeLog:
    
            * config/xtensa/xtensa.cc (xtensa_is_insn_L32R_p):
            Consider relaxed MOVI instructions as L32R.

Diff:
---
 gcc/config/xtensa/xtensa.cc | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc
index 2c534ff9c60..13f2b2b832c 100644
--- a/gcc/config/xtensa/xtensa.cc
+++ b/gcc/config/xtensa/xtensa.cc
@@ -4286,17 +4286,23 @@ xtensa_is_insn_L32R_p (const rtx_insn *insn)
 {
   rtx x = PATTERN (insn);
 
-  if (GET_CODE (x) == SET)
+  if (GET_CODE (x) != SET)
+    return false;
+
+  x = XEXP (x, 1);
+  if (MEM_P (x))
     {
-      x = SET_SRC (x);
-      if (MEM_P (x))
-	{
-	  x = XEXP (x, 0);
-	  return (SYMBOL_REF_P (x) || CONST_INT_P (x))
-		 && CONSTANT_POOL_ADDRESS_P (x);
-	}
+      x = XEXP (x, 0);
+      return (SYMBOL_REF_P (x) || CONST_INT_P (x))
+	     && CONSTANT_POOL_ADDRESS_P (x);
     }
 
+  /* relaxed MOVI instructions, that will be converted to L32R by the
+     assembler.  */
+  if (CONST_INT_P (x)
+      && ! xtensa_simm12b (INTVAL (x)))
+    return true;
+
   return false;
 }