JP2006163854A - Compile method, compile processor, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate an object program excluding a function, which is designated as compile exclusion, from a source program. <P>SOLUTION: A compile processor includes a means 2 for designating the exclusion with a unit of a function and designating a function return value in excluding the function. The object program is not generated in the case of function calling without using the return value concerning the function calling of the function designated as the exclusion in the source program. In the case of the function calling using the return value, the object program, where the function return value in excluding the function is set in a register for the return value of the function, is generated in place of the object program of the calling. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a source program compiling method and processing apparatus, a program, and a recording medium.

When creating execution modules for multiple product models using the standard source program,
It is necessary to include all functions used in each product model and the function calls in the standard source program, and to exclude unnecessary function calls and function bodies according to the specifications for each product model.
In conventional compilers, there is no function for specifying exclusion in units of functions. When creating an execution module for each product model using a standard source program, as shown in FIG. In order to exclude the function call and function body of, the standard source module was edited for each product model, and an execution module was created from the source module for each product model by a compiler and linker (for example, patents) Reference 1).
In addition, other conventional program translation devices exclude unused functions from the execution module at the time of linking, and functions used in standard source programs cannot be excluded. In order to exclude unnecessary functions from the standard source program according to the specification, it is necessary to edit the standard source program (see, for example, Patent Document 2).
JP-A-9-269898 (page 1-3, FIG. 1) JP 2000-1112770 (page 1-2, FIG. 1)

When creating execution modules for multiple product models using a standard source program, the conventional compiler requires editing the standard source program for each product model and managing the source program for each product model. There was a problem of requiring labor.
The present invention has been made in view of such problems, and an object thereof is to provide a method for easily creating an execution module for each product model from a standard source program.

In order to solve the above problem, the present invention is configured as follows.
According to the first aspect of the present invention, in the compiling method for creating an object program by compiling a source program, it is determined whether or not a function is required to be compiled based on a compilation exclusion function table that specifies whether or not a function is to be compiled. It is a feature.
The invention described in claim 2 is characterized in that, in the compilation exclusion function table, a compilation exclusion function and a function return value when the function is excluded from compilation are specified.
According to a third aspect of the present invention, there is provided a compile exclusion function table in which a compile exclusion function and a function return value at the time of compile exclusion of the function are specified in a compilation method in which a source program is compiled to create an object program. An object program is not created if the call to the specified compilation exclusion function is a call that does not use a return value, and a function call part if the call to the specified compilation exclusion function is a call that uses a return value Instead of the object program, an object program for setting the function return value when the compilation is excluded to the function return value register is created.
According to a fourth aspect of the present invention, there is provided a compile processing apparatus for compiling a source program to create an object program, comprising a compile exclusion function table for designating whether or not a function is to be compiled, based on the compile exclusion function table. , Determining whether or not the function needs to be compiled.
The invention described in claim 5 is characterized in that, in the compilation exclusion function table, a compilation exclusion function and a function return value when the function is excluded from compilation are specified.
According to a sixth aspect of the present invention, in a compile processing apparatus for compiling a source program to create an object program, a compile-excluded function table in which a compile-excluded function and a function return value when the function is excluded from compilation are specified If the specified compilation exclusion function call is a call that does not use a return value, an object program is not created, and if the specified compilation exclusion function call is a call that uses a return value, a function call Instead of the object program, the object program for setting the function return value when the compilation is excluded to the function return value register is created.
The invention according to claim 7 is a computer-readable program for compiling a source program to create an object program,
The computer is caused to execute a procedure for determining whether or not to compile a function based on a compile exclusion function table that specifies whether or not to compile a function.
The invention described in claim 8 is characterized in that, in the compilation exclusion function table, a compilation exclusion function and a function return value when the function is excluded from compilation are specified.
The invention according to claim 9 is a computer-readable program for compiling a source program to create an object program, and a compile exclusion function and a function return value when the function is excluded from compilation are designated. Based on the compilation exclusion function table, if the call to the specified compilation exclusion function is a call that does not use a return value, an object program is not created, and the call to the specified compilation exclusion function uses a return value In this case, instead of the object program of the function calling unit, the computer is caused to execute a procedure for creating an object program for setting the function return value when the compilation is excluded in the function return value register.
The invention according to claim 10 records the compile processing program according to any one of claims 7 to 10.

  According to the present invention, it is possible to create an execution module for each product model by excluding unnecessary functions for each product model from the standard source program simply by specifying the compile exclusion in function units and the function return value at the time of exclusion. The editing of the standard source program for each product model and the management of the source program for each product model become unnecessary.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In general, a source program composed of a plurality of functions has a configuration as shown in FIG. That is, in the figure, the function B is called by the function B calling unit described in the function A, and the function C is called by the function C calling unit. The configuration of the source program is not limited to that shown in FIG. 1, and may be arbitrary as long as another function is called from a certain function.
FIG. 2 shows an execution module creation flow according to the present invention. In the figure, reference numeral 3 denotes a compiler, which reads the source module 1 and the compilation exclusion function designation table 2 and generates the object module 4 of FIG. 2 by a compilation method described later. Here, the compile exclusion function refers to a function that does not require compilation. Reference numeral 5 denotes a linker, which reads the object module and generates an execution module by the same link processing means as in the prior art.
FIG. 3 is a compilation exclusion function designation table. In the compilation exclusion function specification table, a compilation exclusion function and a function return value when compilation is excluded are designated. The compile exclusion function and the function return value at the time of compile exclusion specify an arbitrary number of function names and return values in units of lines.

FIG. 4 shows the compile processing flow of the present invention. In the figure, compilation processing is performed by sequentially reading source statements from a source program and creating an object program for the source statements, and the same processing is repeatedly executed until the end of the source program.
Reference numeral 7 denotes a branch processing unit for creating an object program. First, a source statement is analyzed to determine whether it is the head of a function. If the source statement is the head of the function, it is determined by searching the compilation exclusion function specification table shown in FIG. 3 whether or not it is a compilation exclusion function. In the case of a compile exclusion function, the process branches to the function body object program creation processing unit 10 of the compile exclusion function described later. If it is not a compile-exclusion function, the process branches to a conventional object program creation processing unit 9 described later. Next, it is determined whether or not the source statement is a function call. If the source statement is not a function call, the process branches to the conventional object program creation processing unit 9. If the source statement is a function call, it is determined by searching the compilation exclusion function designation table shown in FIG. 3 whether or not it is a compilation exclusion function. In the case of the compile exclusion function, the process branches to a function call object program creation processing unit 8 of the compile exclusion function described later. If it is not a compile exclusion function, the process branches to the conventional object program creation processing unit 9.

Reference numeral 8 denotes a function call object program creation processing unit for an exclusion function, which determines whether the function call uses a return value. If the function call does not use a return value, the next source program statement is created without creating an object program. Return to reading process. In the case of a function call that uses a return value, an object program that replaces the function call by setting the return value at the time of exclusion specified in the compilation exclusion function specification table shown in FIG. 3 in the function return value register After creating, return to the next source program statement reading process.
Reference numeral 9 denotes a conventional object program creation processing unit, which creates an object program by the same method as before, and then returns to the next source program statement reading process.
Reference numeral 10 denotes a function body object program creation processing unit for the compilation exclusion function. After the source statements up to the end of the function are discarded without creating the function body object program, the process returns to the next source program statement reading process.
As described above, according to the present invention, it is possible to create an object program that excludes unnecessary functions from a standard source program only by specifying a compile exclusion function and specifying a return value at the time of exclusion. It is possible to easily create an execution module for each product model.

  An object program that excludes unnecessary functions from various source programs can be easily created, so that it can be applied to all compilers.

Illustration of source program Execution module creation flow showing an embodiment of the present invention Compilation exclusion function specification table Source program compilation processing flow showing an embodiment of the present invention Conventional execution module creation flow for each product model

Explanation of symbols

1 Source Module 2 Compile Exclusion Function and Exclusion Function Return Value Specification Table 3 Compiler 4 Object Module 5 Linker 6 Execution Module 7 Branch Processing Unit for Object Program Creation 8 Function Call Object Program Creation Processing Unit for Compilation Exclusion Function 9 Conventional Object Program Creation processing unit 10 Function body object program creation processing unit for the compile / decision function

Claims (10)

In a compiling method for compiling a source program to create an object program,
A compiling method characterized by determining whether or not a function needs to be compiled based on a compilation exclusion function table that specifies whether or not the function needs to be compiled. 2. The compiling method according to claim 1, wherein a compile exclusion function and a function return value when the function is excluded from compile are specified in the compile exclusion function table. In a compiling method for compiling a source program to create an object program,
A compilation exclusion function table in which a compilation exclusion function and a function return value at the time of compilation exclusion of the function are specified;
If the call to the specified compile exclusion function is a call that does not use a return value, no object program is created,
If the call to the specified compilation exclusion function is a call that uses a return value, create an object program that sets the function return value when the compilation is excluded in the function return value register instead of the object program of the function call section A compiling method characterized by: In a compile processing apparatus that compiles a source program and creates an object program,
Compile exclusion function table that specifies whether to compile functions,
A compile processing apparatus that determines whether or not a function needs to be compiled based on the compile exclusion function table. 5. The compile processing apparatus according to claim 4, wherein the compile exclusion function table specifies a compile exclusion function and a function return value when the function is excluded from compile. In a compile processing apparatus that compiles a source program and creates an object program,
A compilation exclusion function table in which a compilation exclusion function and a function return value at the time of compilation exclusion of the function are specified;
If the call to the specified compile exclusion function is a call that does not use a return value, no object program is created,
If the call to the specified compilation exclusion function is a call that uses a return value, create an object program that sets the function return value when the compilation is excluded in the function return value register instead of the object program of the function call section A compile processing apparatus characterized by: A computer-readable program for compiling a source program to create an object program,
A compile processing program for causing a computer to execute a procedure for determining whether or not to compile a function based on a compile exclusion function table that specifies whether or not to compile a function. 8. The compile processing program according to claim 7, wherein the compile exclusion function table specifies a compile exclusion function and a function return value when the function is excluded from compile. A computer-readable program for compiling a source program to create an object program,
Based on the compilation exclusion function table that specifies the compilation exclusion function and the function return value when the function is excluded from compilation,
If the call to the specified compile exclusion function is a call that does not use a return value, no object program is created,
If the call to the specified compilation exclusion function is a call that uses a return value, create an object program that sets the function return value when the compilation is excluded in the function return value register instead of the object program of the function call section A compilation processing program for causing a computer to execute the procedure to be performed. A computer-readable recording medium in which the compile processing program according to claim 7 is recorded.

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