[COMMITTED] ada: Fix internal error on misaligned component with variable nominal size
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Commit Message
From: Eric Botcazou <ebotcazou@adacore.com>
The back-end cannot handle this kind of components even when they are small.
gcc/ada/
* exp_util.adb (Component_May_Be_Bit_Aligned): Do not return false
for a small component of a record type with a variant part.
Tested on x86_64-pc-linux-gnu, committed on master.
---
gcc/ada/exp_util.adb | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
@@ -4989,12 +4989,15 @@ package body Exp_Util is
return False;
-- If we know that we have a small (at most the maximum integer size)
- -- record or bit-packed array, then everything is fine, since the back
- -- end can handle these cases correctly, except if a slice is involved.
+ -- bit-packed array or record without variant part, then everything is
+ -- fine, since the back end can handle these cases correctly, except if
+ -- a slice is involved.
elsif Known_Esize (Comp)
and then Esize (Comp) <= System_Max_Integer_Size
- and then (Is_Record_Type (UT) or else Is_Bit_Packed_Array (UT))
+ and then (Is_Bit_Packed_Array (UT)
+ or else (Is_Record_Type (UT)
+ and then not Has_Variant_Part (UT)))
and then not For_Slice
then
return False;