procedure that has already been defined. FUNCTION Foo(first, last : integer) : integer; VAR i : integer; BEGIN FOR i := first TO last DO Bar(i); Foo := i END; The Pascal compiler generates the following Jasmin code:

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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The Jasmin code is clearly suboptimal for both speed and size. Write an equivalent but more optimized Jasmin code sequence .

Consider the following function Foo in Pascal program named FinalFor. Assume that Bar is a
procedure that has already been defined.
FUNCTION Foo(first, last : integer) : integer;
VAR
i : integer;
BEGIN
FOR i := first TO last DO Bar(i);
Foo := i
END;
The Pascal compiler generates the following Jasmin code:
.method private static foo(II)I
. var 0 is first I
. var 2 is i I
. var 1 is last I
. var 3 is foo I
iload_0
istore_2
LØ01:
iload_2
iload_1
if_icmpgt LØ03
iconst_0
goto LØ04
LØ03:
iconst_1
LØ04:
ifne LØ02
iload_2
invokestatic finalfor/bar(I)V
iload_2
iconst_1
iadd
istore_2
goto L001
LO02:
iload_2
istore_3
iload_3
ireturn
. Limit locals 4
.limit stack 2
.end method
The Jasmin code is clearly suboptimal for both speed and size. Write an equivalent but more
optimized Jasmin code sequence .
Transcribed Image Text:Consider the following function Foo in Pascal program named FinalFor. Assume that Bar is a procedure that has already been defined. FUNCTION Foo(first, last : integer) : integer; VAR i : integer; BEGIN FOR i := first TO last DO Bar(i); Foo := i END; The Pascal compiler generates the following Jasmin code: .method private static foo(II)I . var 0 is first I . var 2 is i I . var 1 is last I . var 3 is foo I iload_0 istore_2 LØ01: iload_2 iload_1 if_icmpgt LØ03 iconst_0 goto LØ04 LØ03: iconst_1 LØ04: ifne LØ02 iload_2 invokestatic finalfor/bar(I)V iload_2 iconst_1 iadd istore_2 goto L001 LO02: iload_2 istore_3 iload_3 ireturn . Limit locals 4 .limit stack 2 .end method The Jasmin code is clearly suboptimal for both speed and size. Write an equivalent but more optimized Jasmin code sequence .
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