From: Uros Bizjak <ubizjak@gmail.com>
Date: Tue, 7 Nov 2023 18:32:14 +0000 (+0100)
Subject: i386: Make flags_reg_operand a special predicate
X-Git-Tag: basepoints/gcc-15~4911
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fadf10e91872fc09298933e2a74a025966b58a80;p=thirdparty%2Fgcc.git

i386: Make flags_reg_operand a special predicate

There is no need to check the mode in flags_reg_operand predicate. The
mode in flags setting instructions is checked with ix86_match_ccmode.

The patch avoids "warning: operand X missing mode?" warnings with
VOIDmode flags_reg_operand predicate.

gcc/ChangeLog:

	* config/i386/predicates.md ("flags_reg_operand"):
	Make predicate special to avoid automatic mode checks.
---

diff --git a/gcc/config/i386/predicates.md b/gcc/config/i386/predicates.md
index a63b8cd7be50..b5a86257c9ed 100644
--- a/gcc/config/i386/predicates.md
+++ b/gcc/config/i386/predicates.md
@@ -88,7 +88,7 @@
        (match_test "REGNO (op) == AX_REG")))
 
 ;; Return true if op is the flags register.
-(define_predicate "flags_reg_operand"
+(define_special_predicate "flags_reg_operand"
   (and (match_code "reg")
        (match_test "REGNO (op) == FLAGS_REG")))