From: Jakub Jelinek <jakub@redhat.com>
Date: Thu, 10 Aug 2023 07:22:03 +0000 (+0200)
Subject: expr: Small optimization [PR102989]
X-Git-Tag: basepoints/gcc-15~7020
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b129d6b5f5f13995d57d677afcb3e94d0d9c327f;p=thirdparty%2Fgcc.git

expr: Small optimization [PR102989]

Small optimization to avoid testing modifier multiple times.

2023-08-10  Jakub Jelinek  <jakub@redhat.com>

	PR c/102989
	* expr.cc (expand_expr_real_1) <case MEM_REF>: Add an early return for
	EXPAND_WRITE or EXPAND_MEMORY modifiers to avoid testing it multiple
	times.
---

diff --git a/gcc/expr.cc b/gcc/expr.cc
index 174f8acb269a..9a37bff1fdd3 100644
--- a/gcc/expr.cc
+++ b/gcc/expr.cc
@@ -11248,17 +11248,15 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode,
 	set_mem_addr_space (temp, as);
 	if (TREE_THIS_VOLATILE (exp))
 	  MEM_VOLATILE_P (temp) = 1;
-	if (modifier != EXPAND_WRITE
-	    && modifier != EXPAND_MEMORY
-	    && !inner_reference_p
+	if (modifier == EXPAND_WRITE || modifier == EXPAND_MEMORY)
+	  return temp;
+	if (!inner_reference_p
 	    && mode != BLKmode
 	    && align < GET_MODE_ALIGNMENT (mode))
 	  temp = expand_misaligned_mem_ref (temp, mode, unsignedp, align,
 					    modifier == EXPAND_STACK_PARM
 					    ? NULL_RTX : target, alt_rtl);
-	if (reverse
-	    && modifier != EXPAND_MEMORY
-	    && modifier != EXPAND_WRITE)
+	if (reverse)
 	  temp = flip_storage_order (mode, temp);
 	return temp;
       }