From: Eric Botcazou <ebotcazou@adacore.com>
Date: Thu, 30 Jan 2020 20:48:27 +0000 (+0100)
Subject: [Ada] Add No_Truncation flag on view conversion for GNAT-LLVM
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=efd0843da81aafee053afe573bfa944bbd1ee32b;p=gcc.git

[Ada] Add No_Truncation flag on view conversion for GNAT-LLVM

2020-06-05  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* exp_attr.adb (Expand_N_Attribute_Reference) <Valid_Scalars>:
	Set the No_Truncation flag on the unchecked conversion built for
	scalar types.
---

diff --git a/gcc/ada/exp_attr.adb b/gcc/ada/exp_attr.adb
index 9d697961248..1c9b971e927 100644
--- a/gcc/ada/exp_attr.adb
+++ b/gcc/ada/exp_attr.adb
@@ -7185,6 +7185,12 @@ package body Exp_Attr is
                   Unchecked_Convert_To (Val_Typ, New_Copy_Tree (Pref)),
                 Attribute_Name => Name_Valid);
 
+            --  Required by LLVM although the sizes are the same???
+
+            if Nkind (Prefix (Expr)) = N_Unchecked_Type_Conversion then
+               Set_No_Truncation (Prefix (Expr));
+            end if;
+
          --  Validate the scalar components of an array by iterating over all
          --  dimensions of the array while checking individual components.