* [Ada] Avoid repeated conversions from Int to Char_Code
@ 2022-05-10 8:20 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2022-05-10 8:20 UTC (permalink / raw)
To: gcc-patches; +Cc: Piotr Trojanek
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When expanding aggregates like "(others => 'x')" into strings we
repeated conversion from Int to Char_Code for every character. Now we
convert once and use the Char_Code directly.
Cleanup related to handling characters in GNATprove counterexamples;
semantics is unaffected.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* exp_aggr.adb (Expand_N_Aggregate): Replace UI_To_Int with
UI_To_CC; replace magic literals with high-level routines that
recognise wide and wide wide characters; reorder if-then-elsif
condition, because we don't have a routine to detect wide wide
characters.
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diff --git a/gcc/ada/exp_aggr.adb b/gcc/ada/exp_aggr.adb
--- a/gcc/ada/exp_aggr.adb
+++ b/gcc/ada/exp_aggr.adb
@@ -7161,10 +7161,10 @@ package body Exp_Aggr is
and then No (Expressions (N))
then
declare
- X : constant Node_Id := First_Index (T);
- EC : constant Node_Id := Expression (CA);
- CV : constant Uint := Char_Literal_Value (EC);
- CC : constant Int := UI_To_Int (CV);
+ X : constant Node_Id := First_Index (T);
+ EC : constant Node_Id := Expression (CA);
+ CV : constant Uint := Char_Literal_Value (EC);
+ CC : constant Char_Code := UI_To_CC (CV);
begin
if Nkind (X) = N_Range
@@ -7180,17 +7180,19 @@ package body Exp_Aggr is
Start_String;
for J in 1 .. UI_To_Int (Hi) loop
- Store_String_Char (Char_Code (CC));
+ Store_String_Char (CC);
end loop;
Rewrite (N,
Make_String_Literal (Sloc (N),
Strval => End_String));
- if CC >= Int (2 ** 16) then
- Set_Has_Wide_Wide_Character (N);
- elsif CC >= Int (2 ** 8) then
+ if In_Character_Range (CC) then
+ null;
+ elsif In_Wide_Character_Range (CC) then
Set_Has_Wide_Character (N);
+ else
+ Set_Has_Wide_Wide_Character (N);
end if;
Analyze_And_Resolve (N, T);
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