From: Eric Botcazou <ebotcazou@adacore.com>
Date: Sat, 18 Apr 2020 17:26:03 +0000 (+0200)
Subject: [Ada] Small improvement to Optimize_Length_Comparison
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=52531a6203ca7a9d82b8e002a73b0b9d21b932c0;p=gcc.git

[Ada] Small improvement to Optimize_Length_Comparison

2020-06-18  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_ch4.adb (Optimize_Length_Comparison): Accept 32-bit values
	in the full unsigned range.
---

diff --git a/gcc/ada/exp_ch4.adb b/gcc/ada/exp_ch4.adb
index e7db7b0150f..c4cd9b59f7b 100644
--- a/gcc/ada/exp_ch4.adb
+++ b/gcc/ada/exp_ch4.adb
@@ -13898,13 +13898,14 @@ package body Exp_Ch4 is
             end if;
          end if;
 
-         --  Here we have to make sure of being within 32-bits
+         --  Here we have to make sure of being within a 32-bit range (take the
+         --  full unsigned range so the length of 32-bit arrays is accepted).
 
          Determine_Range (N, OK, Lo, Hi, Assume_Valid => True);
 
          if not OK
            or else Lo < Uint_0
-           or else Hi > UI_From_Int (Int'Last)
+           or else Hi > Uint_2 ** 32
          then
             return False;
          end if;