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* [gcc r12-1679] [Ada] Disable wrong computation of offsets within multidimensional arrays
@ 2021-06-21 11:05 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2021-06-21 11:05 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:05447313c9acb24e0fad6305ad333077707de9ba
commit r12-1679-g05447313c9acb24e0fad6305ad333077707de9ba
Author: Piotr Trojanek <trojanek@adacore.com>
Date: Fri Mar 26 09:36:49 2021 +0100
[Ada] Disable wrong computation of offsets within multidimensional arrays
gcc/ada/
* sem_util.adb (Indexed_Component_Bit_Offset): Return an unknown
offset for components within multidimensional arrays; remove
redundant parens.
Diff:
---
gcc/ada/sem_util.adb | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb
index 2e102b93497..44a568404ad 100644
--- a/gcc/ada/sem_util.adb
+++ b/gcc/ada/sem_util.adb
@@ -14827,6 +14827,12 @@ package body Sem_Util is
return No_Uint;
end if;
+ -- Do not attempt to compute offsets within multi-dimensional arrays
+
+ if Present (Next_Index (Ind)) then
+ return No_Uint;
+ end if;
+
if Nkind (Ind) = N_Subtype_Indication then
Ind := Constraint (Ind);
@@ -14843,7 +14849,7 @@ package body Sem_Util is
-- Return the scaled offset
- return Off * (Expr_Value (Exp) - Expr_Value (Low_Bound ((Ind))));
+ return Off * (Expr_Value (Exp) - Expr_Value (Low_Bound (Ind)));
end Indexed_Component_Bit_Offset;
-----------------------------
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