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re PR ada/30740 (Improper semantics in gnat's compilation of certain expressions involving modular arithmetic)

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2008-05-20  Robert Dewar  <dewar@adacore.com>

	PR ada/30740
	* einfo.ads, einfo.adb (Non_Binary_Modulus): Applies to all types and
	subtypes, always False for non-modular types.
	Shared_Var_Assign_Proc (node22) and Shared_Var_Read_Proc (node 15)
	entry nodes have been replaced by Shared_Var_Procs_Instance (node22)
	for Shared_Storage package.
	(Is_RACW_Stub_Type): New entity flag.

	* exp_ch4.adb
	(Expand_N_Op_Expon): Avoid incorrect optimization of a*(2**b) in the
	case where we have a modular type with a non-binary modules.
	Comments reformattings.

	* sem_intr.adb: Simplify code not that Non_Binary_Modulus applies to
	all types.

From-SVN: r135619
This commit is contained in:
Robert Dewar 2008-05-20 14:44:55 +02:00 committed by Arnaud Charlet
parent e7841bacf5
commit 685094bfde
4 changed files with 519 additions and 539 deletions
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47
gcc/ada/einfo.adb
View File

@ -126,7 +126,6 @@ package body Einfo is
-- Scale_Value Uint15
-- Storage_Size_Variable Node15
-- String_Literal_Low_Bound Node15
-- Shared_Var_Read_Proc Node15
-- Access_Disp_Table Elist16
-- Cloned_Subtype Node16
@ -193,7 +192,7 @@ package body Einfo is
-- Private_View Node22
-- Protected_Formal Node22
-- Scope_Depth_Value Uint22
-- Shared_Var_Assign_Proc Node22
-- Shared_Var_Procs_Instance Node22
-- Associated_Final_Chain Node23
-- CR_Discriminant Node23
@ -505,8 +504,8 @@ package body Einfo is
-- Optimize_Alignment_Space Flag241
-- Optimize_Alignment_Time Flag242
-- Overlays_Constant Flag243
-- Is_RACW_Stub_Type Flag244
-- (unused) Flag244
-- (unused) Flag245
-- (unused) Flag246
-- (unused) Flag247
@ -1975,6 +1974,12 @@ package body Einfo is
return Flag189 (Id);
end Is_Pure_Unit_Access_Type;
function Is_RACW_Stub_Type (Id : E) return B is
begin
pragma Assert (Is_Type (Id));
return Flag244 (Id);
end Is_RACW_Stub_Type;
function Is_Raised (Id : E) return B is
begin
pragma Assert (Ekind (Id) = E_Exception);
@ -2239,7 +2244,7 @@ package body Einfo is
function Non_Binary_Modulus (Id : E) return B is
begin
pragma Assert (Is_Modular_Integer_Type (Id));
pragma Assert (Is_Type (Id));
return Flag58 (Base_Type (Id));
end Non_Binary_Modulus;
@ -2537,17 +2542,11 @@ package body Einfo is
return List14 (Id);
end Shadow_Entities;
function Shared_Var_Assign_Proc (Id : E) return E is
function Shared_Var_Procs_Instance (Id : E) return E is
begin
pragma Assert (Ekind (Id) = E_Variable);
return Node22 (Id);
end Shared_Var_Assign_Proc;
function Shared_Var_Read_Proc (Id : E) return E is
begin
pragma Assert (Ekind (Id) = E_Variable);
return Node15 (Id);
end Shared_Var_Read_Proc;
end Shared_Var_Procs_Instance;
function Size_Check_Code (Id : E) return N is
begin
@ -4424,6 +4423,12 @@ package body Einfo is
Set_Flag189 (Id, V);
end Set_Is_Pure_Unit_Access_Type;
procedure Set_Is_RACW_Stub_Type (Id : E; V : B := True) is
begin
pragma Assert (Is_Type (Id));
Set_Flag244 (Id, V);
end Set_Is_RACW_Stub_Type;
procedure Set_Is_Raised (Id : E; V : B := True) is
begin
pragma Assert (Ekind (Id) = E_Exception);
@ -4697,7 +4702,7 @@ package body Einfo is
procedure Set_Non_Binary_Modulus (Id : E; V : B := True) is
begin
pragma Assert (Ekind (Id) = E_Modular_Integer_Type);
pragma Assert (Is_Type (Id) and then Id = Base_Type (Id));
Set_Flag58 (Id, V);
end Set_Non_Binary_Modulus;
@ -5000,17 +5005,11 @@ package body Einfo is
Set_List14 (Id, V);
end Set_Shadow_Entities;
procedure Set_Shared_Var_Assign_Proc (Id : E; V : E) is
procedure Set_Shared_Var_Procs_Instance (Id : E; V : E) is
begin
pragma Assert (Ekind (Id) = E_Variable);
Set_Node22 (Id, V);
end Set_Shared_Var_Assign_Proc;
procedure Set_Shared_Var_Read_Proc (Id : E; V : E) is
begin
pragma Assert (Ekind (Id) = E_Variable);
Set_Node15 (Id, V);
end Set_Shared_Var_Read_Proc;
end Set_Shared_Var_Procs_Instance;
procedure Set_Size_Check_Code (Id : E; V : N) is
begin
@ -7621,6 +7620,7 @@ package body Einfo is
W ("Is_Public", Flag10 (Id));
W ("Is_Pure", Flag44 (Id));
W ("Is_Pure_Unit_Access_Type", Flag189 (Id));
W ("Is_RACW_Stub_Type", Flag244 (Id));
W ("Is_Raised", Flag224 (Id));
W ("Is_Remote_Call_Interface", Flag62 (Id));
W ("Is_Remote_Types", Flag61 (Id));
@ -8131,9 +8131,6 @@ package body Einfo is
when E_String_Literal_Subtype =>
Write_Str ("String_Literal_Low_Bound");
when E_Variable =>
Write_Str ("Shared_Var_Read_Proc");
when others =>
Write_Str ("Field15??");
end case;
@ -8506,7 +8503,7 @@ package body Einfo is
Write_Str ("Private_View");
when E_Variable =>
Write_Str ("Shared_Var_Assign_Proc");
Write_Str ("Shared_Var_Procs_Instance");
when others =>
Write_Str ("Field22??");

45
gcc/ada/einfo.ads
View File

@ -2581,6 +2581,10 @@ package Einfo is
-- subtype appears in a pure unit. Used to give an error message at
-- freeze time if the access type has a storage pool.
-- Is_RACW_Stub_Type (Flag244)
-- Present in all types, true for the stub types generated for remote
-- access-to-class-wide types.
-- Is_Raised (Flag224)
-- Present in exception entities. Set if the entity is referenced by a
-- a raise statement.
@ -2595,12 +2599,12 @@ package Einfo is
-- Is_Remote_Call_Interface (Flag62)
-- Present in all entities. Set in E_Package and E_Generic_Package
-- entities to which a pragma Remote_Call_Interace is applied, and
-- also in all entities within such packages.
-- also on entities declared in the visible part of such a package.
-- Is_Remote_Types (Flag61)
-- Present in all entities. Set in E_Package and E_Generic_Package
-- entities to which a pragma Remote_Types is applied, and also in
-- all entities within such packages.
-- entities to which a pragma Remote_Types is applied, and also on
-- entities declared in the visible part of the spec of such a package.
-- Is_Renaming_Of_Object (Flag112)
-- Present in all entities, set only for a variable or constant for
@ -3044,8 +3048,8 @@ package Einfo is
-- of a record, returns the next _Tag field in this record.
-- Non_Binary_Modulus (Flag58) [base type only]
-- Present in modular integer types. Set if the modulus for the type
-- is other than a power of 2.
-- Present in all subtype and type entities. Set for modular integer
-- types if the modulus value is other than a power of 2.
-- Non_Limited_View (Node17)
-- Present in incomplete types that are the shadow entities created
@ -3479,15 +3483,10 @@ package Einfo is
-- standard format list (i.e. First (Shadow_Entities) is the first
-- entry and subsequent entries are obtained using Next.
-- Shared_Var_Assign_Proc (Node22)
-- Shared_Var_Procs_Instance (Node22)
-- Present in variables. Set non-Empty only if Is_Shared_Passive is
-- set, in which case this is the entity for the shared memory assign
-- routine. See Exp_Smem for full details.
-- Shared_Var_Read_Proc (Node15)
-- Present in variables. Set non-Empty only if Is_Shared_Passive is
-- set, in which case this is the entity for the shared memory read
-- routine. See Exp_Smem for full details.
-- set, in which case this is the entity for the associated instance of
-- System.Shared_Storage.Shared_Var_Procs. See Exp_Smem for full details.
-- Size_Check_Code (Node19)
-- Present in constants and variables. Normally Empty. Set if code is
@ -4698,6 +4697,7 @@ package Einfo is
-- Is_Generic_Actual_Type (Flag94)
-- Is_Generic_Type (Flag13)
-- Is_Protected_Interface (Flag198)
-- Is_RACW_Stub_Type (Flag244)
-- Is_Synchronized_Interface (Flag199)
-- Is_Task_Interface (Flag200)
-- Is_Non_Static_Subtype (Flag109)
@ -5490,14 +5490,13 @@ package Einfo is
-- Esize (Uint12)
-- Extra_Accessibility (Node13)
-- Alignment (Uint14)
-- Shared_Var_Read_Proc (Node15)
-- Unset_Reference (Node16)
-- Actual_Subtype (Node17)
-- Renamed_Object (Node18)
-- Size_Check_Code (Node19)
-- Prival_Link (Node20)
-- Interface_Name (Node21)
-- Shared_Var_Assign_Proc (Node22)
-- Shared_Var_Procs_Instance (Node22)
-- Extra_Constrained (Node23)
-- Debug_Renaming_Link (Node25)
-- Last_Assignment (Node26)
@ -5990,6 +5989,7 @@ package Einfo is
function Is_Public (Id : E) return B;
function Is_Pure (Id : E) return B;
function Is_Pure_Unit_Access_Type (Id : E) return B;
function Is_RACW_Stub_Type (Id : E) return B;
function Is_Raised (Id : E) return B;
function Is_Remote_Call_Interface (Id : E) return B;
function Is_Remote_Types (Id : E) return B;
@ -6085,8 +6085,7 @@ package Einfo is
function Scope_Depth_Value (Id : E) return U;
function Sec_Stack_Needed_For_Return (Id : E) return B;
function Shadow_Entities (Id : E) return S;
function Shared_Var_Assign_Proc (Id : E) return E;
function Shared_Var_Read_Proc (Id : E) return E;
function Shared_Var_Procs_Instance (Id : E) return E;
function Size_Check_Code (Id : E) return N;
function Size_Known_At_Compile_Time (Id : E) return B;
function Size_Depends_On_Discriminant (Id : E) return B;
@ -6555,6 +6554,7 @@ package Einfo is
procedure Set_Is_Public (Id : E; V : B := True);
procedure Set_Is_Pure (Id : E; V : B := True);
procedure Set_Is_Pure_Unit_Access_Type (Id : E; V : B := True);
procedure Set_Is_RACW_Stub_Type (Id : E; V : B := True);
procedure Set_Is_Raised (Id : E; V : B := True);
procedure Set_Is_Remote_Call_Interface (Id : E; V : B := True);
procedure Set_Is_Remote_Types (Id : E; V : B := True);
@ -6650,8 +6650,7 @@ package Einfo is
procedure Set_Scope_Depth_Value (Id : E; V : U);
procedure Set_Sec_Stack_Needed_For_Return (Id : E; V : B := True);
procedure Set_Shadow_Entities (Id : E; V : S);
procedure Set_Shared_Var_Assign_Proc (Id : E; V : E);
procedure Set_Shared_Var_Read_Proc (Id : E; V : E);
procedure Set_Shared_Var_Procs_Instance (Id : E; V : E);
procedure Set_Size_Check_Code (Id : E; V : N);
procedure Set_Size_Depends_On_Discriminant (Id : E; V : B := True);
procedure Set_Size_Known_At_Compile_Time (Id : E; V : B := True);
@ -7236,6 +7235,7 @@ package Einfo is
pragma Inline (Is_Public);
pragma Inline (Is_Pure);
pragma Inline (Is_Pure_Unit_Access_Type);
pragma Inline (Is_RACW_Stub_Type);
pragma Inline (Is_Raised);
pragma Inline (Is_Real_Type);
pragma Inline (Is_Record_Type);
@ -7340,8 +7340,7 @@ package Einfo is
pragma Inline (Scope_Depth_Value);
pragma Inline (Sec_Stack_Needed_For_Return);
pragma Inline (Shadow_Entities);
pragma Inline (Shared_Var_Assign_Proc);
pragma Inline (Shared_Var_Read_Proc);
pragma Inline (Shared_Var_Procs_Instance);
pragma Inline (Size_Check_Code);
pragma Inline (Size_Depends_On_Discriminant);
pragma Inline (Size_Known_At_Compile_Time);
@ -7628,6 +7627,7 @@ package Einfo is
pragma Inline (Set_Is_Public);
pragma Inline (Set_Is_Pure);
pragma Inline (Set_Is_Pure_Unit_Access_Type);
pragma Inline (Set_Is_RACW_Stub_Type);
pragma Inline (Set_Is_Raised);
pragma Inline (Set_Is_Remote_Call_Interface);
pragma Inline (Set_Is_Remote_Types);
@ -7722,8 +7722,7 @@ package Einfo is
pragma Inline (Set_Scope_Depth_Value);
pragma Inline (Set_Sec_Stack_Needed_For_Return);
pragma Inline (Set_Shadow_Entities);
pragma Inline (Set_Shared_Var_Assign_Proc);
pragma Inline (Set_Shared_Var_Read_Proc);
pragma Inline (Set_Shared_Var_Procs_Instance);
pragma Inline (Set_Size_Check_Code);
pragma Inline (Set_Size_Depends_On_Discriminant);
pragma Inline (Set_Size_Known_At_Compile_Time);

962
gcc/ada/exp_ch4.adb
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File diff suppressed because it is too large Load Diff

4
gcc/ada/sem_intr.adb
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@ -418,9 +418,7 @@ package body Sem_Intr is
Ptyp1, N);
return;
elsif Is_Modular_Integer_Type (Typ1)
and then Non_Binary_Modulus (Typ1)
then
elsif Non_Binary_Modulus (Typ1) then
Errint
("shifts not allowed for non-binary modular types",
Ptyp1, N);