From: Steve Baird <baird@adacore.com>
Date: Thu, 10 Aug 2023 22:39:01 +0000 (-0700)
Subject: ada: Spurious warning about negative modular literal
X-Git-Tag: basepoints/gcc-15~6454
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bed30418f910df5ea605b7f5ee4b86a6ab7e9411;p=thirdparty%2Fgcc.git

ada: Spurious warning about negative modular literal

If -gnatw.m is enabled, the compiler generates a warning if a unary
minus operator of a modular type is applied to an integer literal.
This warning was being incorrectly generated in some cases where no integer
literal is present in the source code.

gcc/ada/

	* sem_res.adb (Resolve_Unary_Op): In deciding whether to emit a
	warning about a modular type's unary minus operator being applied
	to an integer literal, ignore integer literals for which
	Comes_From_Source is False.
---

diff --git a/gcc/ada/sem_res.adb b/gcc/ada/sem_res.adb
index 9755e4d14a6d..c708d04fc32a 100644
--- a/gcc/ada/sem_res.adb
+++ b/gcc/ada/sem_res.adb
@@ -12671,6 +12671,7 @@ package body Sem_Res is
       if Warn_On_Suspicious_Modulus_Value
         and then Nkind (N) = N_Op_Minus
         and then Nkind (R) = N_Integer_Literal
+        and then Comes_From_Source (R)
         and then Is_Modular_Integer_Type (B_Typ)
         and then Nkind (Parent (N)) not in N_Qualified_Expression
                                          | N_Type_Conversion