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compiler design tcompiler-design-timothy-g-griffin
6. Generate code for the following C program using any code generation algorithm. [3 Marks] main() { int x, a, b, c, d, e; x= a + b -( c + d ) * e }
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Compiler Design
Jan 31
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Ebrahim
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ullman
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Compiler-design
Q1. For the following grammar N -> AB | BA A -> a | CAC B -> b | CBC C -> a | b Find the FIRST and FOLLOW
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Compiler Design
Jan 12
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Ebrahim
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compiler-design
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compiler-design-timothy-g-griffin
Find the FIRST and FOLLOW of the grammar to check whether it is LL (1) parser or not. N → AB | BA A → a | CAC B → b | CBC C → a | b
Ebrahim
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Compiler Design
Jan 11
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Ebrahim
88
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compiler-design
parsing
ullman
syntax-directed-translation
code-optimization
1
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Ullman (Compiler Design) Edition 2 Exercise 6.5 Question 2 (Page No. 399)
As in Ada, suppose that each expression must have a unique type, but that from a subexpression, by itself, all we can deduce is a set of possible types. That is, the application of function ... of the overall expression is determined, proceeds top-down to determine attribute $unique$ for the type of each subexpression.
admin
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Compiler Design
Sep 7, 2019
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admin
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
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5
Ullman (Compiler Design) Edition 2 Exercise 6.5 Question 1 (Page No. 398)
Assuming that function $widen$ in Fig. $6.26$ can handle any of the types in the hierarchy of Fig. $6.25(a)$, translate the expressions below. Assume that c and d are characters, $s$ and $t$ are short integers, $i$ and $j$ are integers, and $x$ is a float. $x=s+c$ $i=s+c$ $x=(s+c)\ast(t+d)$
admin
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Compiler Design
Sep 7, 2019
by
admin
685
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
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6
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 9 (Page No. 386)
$A$ real array $A[i, j, k]$ has index $i$ ranging from $1$ to $4$, index $j$ ranging from $0$ to $4$, and index $k$ ranging from $5$ to $10$. Reals take $8$ bytes each. Suppose array $A$ is stored starting at byte $0$. Find the location of: $A[3,4,5]$ $A[1,2,7]$ $A[4,3,9]$ if $A$ is stored in column-major order.
admin
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Compiler Design
Sep 7, 2019
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admin
520
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
1
answer
7
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 8 (Page No. 386)
$A$ real array $A[i, j, k]$ has index $i$ ranging from $1$ to $4$, index $j$ ranging from $0$ to $4$, and index $k$ ranging from $5$ to $10$. Reals take $8$ bytes each. Suppose array $A$ is stored starting at byte $0$. Find the location of: $A[3,4,5]$ $A[1,2,7]$ $A[4,3,9]$
admin
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Compiler Design
Sep 7, 2019
by
admin
829
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
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0
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8
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 7 (Page No. 386)
An integer array $A[i, j]$ has index $i$ ranging from $1$ to $10$ and index $j$ ranging from $1$ to $20$. Integers take $4$ bytes each. Suppose array $A$ is stored starting at byte $0$. Find the location of: $A[4,5]$ $A[10,8]$ $A[3,17]$ if A is stored in column-major order.
admin
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Compiler Design
Sep 7, 2019
by
admin
898
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
1
answer
9
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 6 (Page No. 386)
An integer array $A[i, j]$ has index $i$ ranging from $1$ to $10$ and index $j$ ranging from $1$ to $20$. Integers take $4$ bytes each. Suppose array $A$ is stored starting at byte $0$. Find the location of: $A[4,5]$ $A[10,8]$ $A[3,17]$
admin
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in
Compiler Design
Sep 7, 2019
by
admin
525
views
ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
0
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10
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 5 (Page No. 385 - 386)
Generalize formula $(6.7)$ to multidimensional arrays, and indicate what values can be stored in the symbol table and used to compute offsets. Consider the following cases: An array $A$ of two dimensions, in row-major form. The first ... $h_{j}$.The same as $(c)$ but with the array stored in column-major form.
admin
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Compiler Design
Sep 7, 2019
by
admin
343
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
0
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11
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 4 (Page No. 385)
Revise the translation of Fig. $6.22$ for array references of the Fortran style, that is, $id[E_{1}, E_{2},\cdot\cdot\cdot,E_{n}]$ for an $n-$dimensional array.
admin
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Compiler Design
Sep 7, 2019
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admin
359
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
0
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Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 3 (Page No. 385)
Use the translation of Fig. $6.22$ to translate the following assignments: $x=a[i]+b[j]$ $x=a[i][j]+b[i][j]$ $x=a[b[i][j]][c[[k]]$
admin
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Compiler Design
Sep 7, 2019
by
admin
678
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
0
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13
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 2 (Page No. 384)
Add to the translation of Fig. $6.19$ rules for the following productions: $E\rightarrow E_{1}\ast E_{2}$ $E\rightarrow + E_{1}\:$(unary plus)
admin
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Compiler Design
Sep 7, 2019
by
admin
432
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
0
answers
14
Ullman (Compiler Design) Edition 2 Exercise 6.4 Question 1 (Page No. 384)
Add to the translation of Fig. $6.19$ rules for the following productions: $E\rightarrow E_{1}\ast E_{2}$ $E\rightarrow + E_{1}\:$(unary plus)
admin
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Compiler Design
Sep 7, 2019
by
admin
575
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ullman
compiler-design
intermediate-code
three-address-code
descriptive
0
votes
0
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15
Ullman (Compiler Design) Edition 2 Exercise 6.3 Question 2 (Page No. 378)
Extend the handling of field names in Fig. $6.18$ to classes and single-inheritance class hierarchies. Give an implementation of class $Enu$ that allows linked symbol tables, so that a subclass can ... inherited fields. Inherited fields must maintain the relative addresses they were assigned in the layout for the superclass.
admin
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Compiler Design
Sep 7, 2019
by
admin
475
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ullman
compiler-design
three-address-code
intermediate-code
descriptive
0
votes
0
answers
16
Ullman (Compiler Design) Edition 2 Exercise 6.3 Question 1 (Page No. 378)
Determine the types and relative addresses for the identifiers in the following sequence of declarations: float x; record { float x; float y; } p; record { int tag; float x; float y; } q;
admin
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Compiler Design
Sep 7, 2019
by
admin
1.2k
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ullman
compiler-design
three-address-code
intermediate-code
descriptive
0
votes
1
answer
17
Ullman (Compiler Design) Edition 2 Exercise 6.2 Question 3 (Page No. 370)
Show how to transform a three-address code sequence into one in which each defined variable gets a unique variable name.
admin
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Compiler Design
Sep 7, 2019
by
admin
1.6k
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ullman
compiler-design
three-address-code
intermediate-code
descriptive
1
vote
1
answer
18
Ullman (Compiler Design) Edition 2 Exercise 6.2 Question 2 (Page No. 370)
Translate the following arithmetic expression into: $a=b[i]+c[j]$ $a[i]=b\ast c-b\ast d$ $x=f(y+1)+2$ $x=\ast p + \&y$ A Syntax tree Quadruples Triples Indirect triples
admin
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Compiler Design
Sep 7, 2019
by
admin
7.8k
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ullman
compiler-design
three-address-code
intermediate-code
descriptive
0
votes
1
answer
19
Ullman (Compiler Design) Edition 2 Exercise 6.2 Question 1 (Page No. 370)
Translate the arithmetic expression $a + -(b + c)$ into: A syntax tree. Quadruples. Triples. Indirect triples
admin
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Compiler Design
Sep 7, 2019
by
admin
10.5k
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ullman
compiler-design
three-address-code
intermediate-code
descriptive
0
votes
1
answer
20
Ullman (Compiler Design) Edition 2 Exercise 6.1 Question 2 (Page No. 363)
Construct the DAG and identify the value numbers for the subexpressions of the following expressions, assuming $+$ associates from the left. $a+b+(a+b)$ $a+b+a+b$ $a+a+((a+a+a+(a+a+a+a))$
admin
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Compiler Design
Sep 7, 2019
by
admin
4.7k
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ullman
compiler-design
three-address-code
directed-acyclic-graph
descriptive
1
vote
2
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21
Ullman (Compiler Design) Edition 2 Exercise 6.1 Question 1 (Page No. 362)
Construct the DAG for the expression $((x + y)-((x + y)\ast(x -y))) + ((x+y)\ast(x-y))$
admin
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Compiler Design
Sep 7, 2019
by
admin
2.5k
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ullman
compiler-design
three-address-code
directed-acyclic-graph
descriptive
0
votes
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22
Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 7 (Page No. 337)
Modify the SDD of Fig. $5.25$ to include superscripts denoted by operator sup between boxes. If box $B_{2}$ is a superscript of box $B_{1}$, then position the baseline of $B_{2}\:0.6$ times the point size of $B_{1}$ above the baseline of $B_{1}.\text{Add}$ the new production and rules to the SDT of Fig. $5.26$.
admin
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Compiler Design
Sep 6, 2019
by
admin
588
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ullman
compiler-design
syntax-directed-translation
grammar
descriptive
0
votes
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23
Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 6 (Page No. 337)
Modify the SDD of Fig. $5.25$ to include a synthesized attribute $B.le$, the length of a box. The length of the concatenation of two boxes is the sum of the lengths of each. Then add your new rules to the proper positions in the SDT of Fig. $5.26$.
admin
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Compiler Design
Sep 6, 2019
by
admin
615
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ullman
compiler-design
syntax-directed-translation
grammar
descriptive
0
votes
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24
Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 5 (Page No. 337)
Write L-attributed SDT's analogous to that of Example $5.19$ for the following productions, each of which represents a familiar flow-of-control construct, as in the programming language C. You may need to ... middle to the next statement, so it is not sufficient simply to generate code for each statement in order.
admin
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Compiler Design
Sep 6, 2019
by
admin
474
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ullman
compiler-design
syntax-directed-translation
grammar
descriptive
0
votes
0
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25
Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 4 (Page No. 337)
Write L-attributed SDD's analogous to that of Example $5.19$ for the following productions, each of which represents a familiar flow-of-control construct, as in the programming language C. You may need to ... middle to the next statement, so it is not sufficient simply to generate code for each statement in order.
admin
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Compiler Design
Sep 6, 2019
by
admin
436
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ullman
compiler-design
syntax-directed-translation
grammar
descriptive
1
vote
1
answer
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Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 3 (Page No. 337)
The following SDT computes the value of a string of $0's$ and $1's$ ... so the underlying grammar is not left recursive, and yet the same value of $B.val$ is computed for the entire input string.
admin
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Compiler Design
Sep 6, 2019
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admin
2.1k
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ullman
compiler-design
syntax-directed-translation
grammar
left-recursion
descriptive
1
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1
answer
27
Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 2 (Page No. 336 - 337)
Rewrite the following SDT: $A\rightarrow A\{a\}B\mid AB\{b\}\mid 0$ $B\rightarrow B\{c\}A\mid BA\{d\}\mid 1$ so that the underlying grammar becomes non-left-recursive. Here, $a, b, c$, and $d$ are actions, and $0$ and $1$ are terminals.
admin
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Compiler Design
Sep 6, 2019
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admin
766
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ullman
compiler-design
syntax-directed-translation
grammar
descriptive
0
votes
0
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28
Ullman (Compiler Design) Edition 2 Exercise 5.4 Question 1 (Page No. 336)
We mentioned in Section $5.4.2$ that it is possible to deduce, from the LR state on the parsing stack, what grammar symbol is represented by the state. How would we discover this information?
admin
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Compiler Design
Sep 6, 2019
by
admin
504
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ullman
compiler-design
syntax-directed-translation
grammar
descriptive
0
votes
0
answers
29
Ullman (Compiler Design) Edition 2 Exercise 5.3 Question 3 (Page No. 323)
Give an SDD to differentiate expressions such as $x\ast(3\ast x + x\ast x)$ involving the operators $+$ and $\ast,$ the variable $x$, and constants. Assume that no simplification occurs, so that, for example, $3\ast x$ will be translated into $3\ast 1+0\ast x$.
admin
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Compiler Design
Sep 6, 2019
by
admin
485
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ullman
compiler-design
syntax-directed-translation
0
votes
0
answers
30
Ullman (Compiler Design) Edition 2 Exercise 5.3 Question 2 (Page No. 323)
Give an SDD to translate infix expressions with $+$ and $\ast$ into equivalent expressions without redundant parentheses. For example, since both operators associate from the left, and $\ast$ takes precedence over $+, ((a\ast(b+c))\ast(d))$ translates into $a\ast(b + c)\ast d$.
admin
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Sep 6, 2019
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admin
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