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* gcc-interface/trans.c (return_value_ok_for_nrv_p): Add sanity check. 

From-SVN: r245701
This commit is contained in:
Eric Botcazou 2017-02-24 10:35:14 +00:00 committed by Eric Botcazou
parent 59909673d1
commit 0b9cdb9a40
4 changed files with 34 additions and 0 deletions
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4
gcc/ada/ChangeLog
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@ -1,3 +1,7 @@
2017-02-24 Eric Botcazou <ebotcazou@adacore.com>
* gcc-interface/trans.c (return_value_ok_for_nrv_p): Add sanity check.
2017-02-24 Eric Botcazou <ebotcazou@adacore.com>
* gcc-interface/decl.c: Include demangle.h.

7
gcc/ada/gcc-interface/trans.c
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@ -3614,9 +3614,16 @@ return_value_ok_for_nrv_p (tree ret_obj, tree ret_val)
if (TREE_ADDRESSABLE (ret_val))
return false;
/* For the constrained case, test for overalignment. */
if (ret_obj && DECL_ALIGN (ret_val) > DECL_ALIGN (ret_obj))
return false;
/* For the unconstrained case, test for bogus initialization. */
if (!ret_obj
&& DECL_INITIAL (ret_val)
&& TREE_CODE (DECL_INITIAL (ret_val)) == NULL_EXPR)
return false;
return true;
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2017-02-24 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/opt63.adb: New test.
2017-02-24 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/discr47.adb: New test.

19
gcc/testsuite/gnat.dg/opt63.adb Normal file
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@ -0,0 +1,19 @@
-- { dg-do compile }
-- { dg-options "-O -gnatws" }
procedure Opt63 is
type T_MOD is mod 2**32;
subtype T_INDEX is T_MOD range 3_000_000_000 .. 4_000_000_000;
type T_ARRAY is array(T_INDEX range <>) of INTEGER;
function Build_Crash(First : T_INDEX; Length : NATURAL) return T_ARRAY is
R : T_ARRAY(First .. T_Index'Val (T_Index'Pos (First) + Length))
:= (others => -1); -- Crash here
begin
return R;
end;
begin
null;
end;