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* [gcc r12-1455] [Ada] Variable-sized node types: improve error messages
@ 2021-06-15 10:21 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2021-06-15 10:21 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:5fdd694a74ca51b6f4fa2317c7527a1eaf1e7f57
commit r12-1455-g5fdd694a74ca51b6f4fa2317c7527a1eaf1e7f57
Author: Bob Duff <duff@adacore.com>
Date: Mon Mar 1 17:35:17 2021 -0500
[Ada] Variable-sized node types: improve error messages
gcc/ada/
* gen_il-gen.adb (To_Bit_Offset): Use 'Base to avoid overflow in
computations in Last_Bit when Offset = 'Last.
(Choose_Offset): Give a better error message when we run out of
fields. In particular, point out that
Gen_IL.Internals.Bit_Offset'Last needs to be increased.
Diff:
---
gcc/ada/gen_il-gen.adb | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/gcc/ada/gen_il-gen.adb b/gcc/ada/gen_il-gen.adb
index 6349841139b..36662895950 100644
--- a/gcc/ada/gen_il-gen.adb
+++ b/gcc/ada/gen_il-gen.adb
@@ -860,9 +860,9 @@ package body Gen_IL.Gen is
function Field_Size (F : Field_Enum) return Bit_Offset is
(Field_Size (Field_Table (F).Field_Type));
- function To_Bit_Offset (F : Field_Enum; Offset : Field_Offset)
- return Bit_Offset is
- (Bit_Offset (Offset) * Field_Size (F));
+ function To_Bit_Offset (F : Field_Enum; Offset : Field_Offset'Base)
+ return Bit_Offset'Base is
+ (Bit_Offset'Base (Offset) * Field_Size (F));
function First_Bit (F : Field_Enum; Offset : Field_Offset)
return Bit_Offset is
(To_Bit_Offset (F, Offset));
@@ -964,7 +964,9 @@ package body Gen_IL.Gen is
end if;
end loop;
- raise Illegal with "No available field offset for " & Image (F);
+ raise Illegal with "No available field offset for " & Image (F) &
+ "; need to increase Gen_IL.Internals.Bit_Offset'Last (" &
+ Image (Gen_IL.Internals.Bit_Offset'Last) & " is too small)";
end Choose_Offset;
Num_Concrete_Have_Field : array (Field_Enum) of Type_Count :=
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