This patch adjusts the behavior of the wavefront to incorporate frontend
inlining support when compiling on AMMP or VM targets. This new support
is temporarily available using -gnatd.k
These are the rules:
* At -O0, or compiling on AAMP or VM targets, use fe inlining when
inline_always is specified except if the function returns a controlled
type. The deprecated switch -gnatN can be used at this level.
* At other optimization levels use the fe inlining for both inline
and inline_always in the following cases:
- function returning a known at compile time constant
- function returning a call to an intrinsic function
- function returning an unconstrained type through an Ada 2005
extended return statement
- function returning a call to a frontend-inlined function
Use the back-end mechanism otherwise
Tested on x86_64-pc-linux-gnu, committed on trunk
2012-03-09 Javier Miranda <[email protected]>
* sem_ch6.adb (Check_Body_To_Inline): In AAMP and VM targets
use frontend inlining at all optimization levels.
* sem_util.adb (Must_Inline): In AAMP and VM targets, given that
there is no inlining support in the backend, use also frontend
inlining when compiling with optimizations enabled.
* exp_ch6.adb (Expand_Call): Minor code reorganization.
Index: sem_util.adb
===================================================================
--- sem_util.adb (revision 185136)
+++ sem_util.adb (working copy)
@@ -9422,7 +9422,13 @@
function Must_Inline (Subp : Entity_Id) return Boolean is
begin
- return Optimization_Level = 0
+ -- AAMP and VM targets have no support for inlining in the backend.
+ -- Hence we do as much inlining as possible in the front end.
+
+ return
+ (Optimization_Level = 0
+ or else AAMP_On_Target
+ or else VM_Target /= No_VM)
and then Has_Pragma_Inline (Subp)
and then (Has_Pragma_Inline_Always (Subp) or else Front_End_Inlining);
end Must_Inline;
Index: exp_ch6.adb
===================================================================
--- exp_ch6.adb (revision 185136)
+++ exp_ch6.adb (working copy)
@@ -3790,10 +3790,7 @@
Spec : constant Node_Id := Unit_Declaration_Node (Subp);
begin
- if Optimization_Level > 0 then
- Do_Inline (Subp, Orig_Subp);
-
- elsif Must_Inline (Subp) then
+ if Must_Inline (Subp) then
if In_Extended_Main_Code_Unit (Call_Node)
and then In_Same_Extended_Unit (Sloc (Spec), Loc)
and then not Has_Completion (Subp)
@@ -3805,6 +3802,9 @@
else
Do_Inline_Always (Subp, Orig_Subp);
end if;
+
+ elsif Optimization_Level > 0 then
+ Do_Inline (Subp, Orig_Subp);
end if;
-- The call may have been inlined or may have been passed to
Index: sem_ch6.adb
===================================================================
--- sem_ch6.adb (revision 185136)
+++ sem_ch6.adb (working copy)
@@ -4888,9 +4888,13 @@
Remove (Body_To_Analyze);
-- Keep separate checks needed when compiling without optimizations
+ -- AAMP and VM targets have no support for inlining in the backend
+ -- and hence we use frontend inlining at all optimization levels.
- if Optimization_Level = 0 then
-
+ if Optimization_Level = 0
+ or else AAMP_On_Target
+ or else VM_Target /= No_VM
+ then
-- Cannot inline functions whose body has a call that returns an
-- unconstrained type since the secondary stack is involved, and
-- it is not worth inlining.
