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* [gcc r12-1675] [Ada] Simplify detection of statically overlapping slices
@ 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:c9fcf011726d2578acfcf58eae05646fce6dae94
commit r12-1675-gc9fcf011726d2578acfcf58eae05646fce6dae94
Author: Piotr Trojanek <trojanek@adacore.com>
Date: Thu Mar 25 13:17:40 2021 +0100
[Ada] Simplify detection of statically overlapping slices
gcc/ada/
* sem_util.adb (Denotes_Same_Object): Simplify handling of
slices.
Diff:
---
gcc/ada/sem_util.adb | 23 ++++++-----------------
1 file changed, 6 insertions(+), 17 deletions(-)
diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb
index 6727e15d2d2..b59116e540b 100644
--- a/gcc/ada/sem_util.adb
+++ b/gcc/ada/sem_util.adb
@@ -7462,9 +7462,12 @@ package body Sem_Util is
-- Check whether bounds are statically identical. There is no
-- attempt to detect partial overlap of slices.
- return Denotes_Same_Object (Lo1, Lo2)
- and then
- Denotes_Same_Object (Hi1, Hi2);
+ return Is_OK_Static_Expression (Lo1)
+ and then Is_OK_Static_Expression (Lo2)
+ and then Is_OK_Static_Expression (Hi1)
+ and then Is_OK_Static_Expression (Hi2)
+ and then Expr_Value (Lo1) = Expr_Value (Lo2)
+ and then Expr_Value (Hi1) = Expr_Value (Hi2);
end;
end if;
@@ -7485,20 +7488,6 @@ package body Sem_Util is
then
return Denotes_Same_Object (A1, Renamed_Entity (Entity (A2)));
- -- In the recursion, integer literals appear as slice bounds
-
- elsif Nkind (A1) = N_Integer_Literal
- and then Nkind (A2) = N_Integer_Literal
- then
- return Intval (A1) = Intval (A2);
-
- -- Likewise for character literals
-
- elsif Nkind (A1) = N_Character_Literal
- and then Nkind (A2) = N_Character_Literal
- then
- return Char_Literal_Value (A1) = Char_Literal_Value (A2);
-
else
return False;
end if;
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