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* [gcc r12-2141] [Ada] Avoid linear search when ensuring dependency on System
@ 2021-07-08 13:35 Pierre-Marie de Rodat
0 siblings, 0 replies; only message in thread
From: Pierre-Marie de Rodat @ 2021-07-08 13:35 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:79a8b14237eca20a0e8256f5683d6ca092f38a0b
commit r12-2141-g79a8b14237eca20a0e8256f5683d6ca092f38a0b
Author: Piotr Trojanek <trojanek@adacore.com>
Date: Mon May 24 16:14:40 2021 +0200
[Ada] Avoid linear search when ensuring dependency on System
gcc/ada/
* lib-writ.adb (Ensure_System_Dependency): Replace search in
Lib.Units with a search in Lib.Unit_Names.
Diff:
---
gcc/ada/lib-writ.adb | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/gcc/ada/lib-writ.adb b/gcc/ada/lib-writ.adb
index 416052c943e..1b2912a53b2 100644
--- a/gcc/ada/lib-writ.adb
+++ b/gcc/ada/lib-writ.adb
@@ -137,7 +137,8 @@ package body Lib.Writ is
------------------------------
procedure Ensure_System_Dependency is
- System_Uname : Unit_Name_Type;
+ System_Uname : constant Unit_Name_Type :=
+ Name_To_Unit_Name (Name_System);
-- Unit name for system spec if needed for dummy entry
System_Fname : File_Name_Type;
@@ -146,11 +147,9 @@ package body Lib.Writ is
begin
-- Nothing to do if we already compiled System
- for Unum in Units.First .. Last_Unit loop
- if Source_Index (Unum) = System_Source_File_Index then
- return;
- end if;
- end loop;
+ if Unit_Names.Get (System_Uname) /= No_Unit then
+ return;
+ end if;
-- If no entry for system.ads in the units table, then add a entry
-- to the units table for system.ads, which will be referenced when
@@ -158,7 +157,6 @@ package body Lib.Writ is
-- on system as a result of Targparm scanning the system.ads file to
-- determine the target dependent parameters for the compilation.
- System_Uname := Name_To_Unit_Name (Name_System);
System_Fname := File_Name (System_Source_File_Index);
Units.Increment_Last;
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