⦁ Issues in Code Generation are:
1. Input to code generator
2. Target program
3. Memory management
4. Instruction selection
5. Register allocation
6. Choice of evaluation
7. Approaches to code generation
Generate target code for the basic block:
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Statement
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L
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Code Generated
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Register descriptor
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Address descriptor
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All Register empty
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t1 : = a + b
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R0
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MOV a, R0
ADD b, R0
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R0 contains t1
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T1 in R0
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t2 : = c + d
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R1
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MOV c, R1
ADD d, R1
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R1 contains t2
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T2 in R2
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t3 : = e - t2
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R1
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SUB e, R1
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R1 contains t3
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T3 in R1
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t4 : = t1 - t3
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R0
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SUB R0, R1
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R0 contains t4
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T4 in R0
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MOV R0, Result
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Result in R0 and memory
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