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Basic Block, Trace and Instruction Selection

Basic Block, Trace and Instruction Selection

Basic Block, Trace and Instruction Selection. Chapter 8 , 9. (1) Semantic gap. Tree IR. Machine Languages. (2) IR is not proper for optimization analysis. Tree representation => no execution order is assumed. Tree Model v.s. Flat list of instructions Eg:

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718 views • 58 slides
Basic Blocks

Basic Blocks

Basic Blocks. Mooly Sagiv Schrierber 317 03-640-7606 Wed 10:00-12:00 html://www.math.tau.ac.il/~msagiv/courses/wcc.html. Already Studied. Source program (string). lexical analysis. Tokens. syntax analysis. Abstract syntax tree. semantic analysis. Abstract syntax tree. Translate.

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663 views • 52 slides
Basic Block and Trace

Basic Block and Trace

Basic Block and Trace. Chapter 8. (1) Semantic gap. Tree IR. Machine Languages. (2) IR is not proper for optimization analysis. Eg: - Some expressions have side effects ESEQ, CALL Tree representation => no execution order is assumed. - Semantic Gap

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576 views • 49 slides
Basic Block and Trace

Basic Block and Trace

Basic Block and Trace. Chapter 8. (1) Semantic gap. Tree IR. Machine Languages. (2) IR is not proper for optimization analysis. Eg: - Some expressions have side effects ESEQ, CALL Tree representation => no execution order is assumed. - Semantic Gap

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541 views • 45 slides
Instruction Selection

Instruction Selection

Leonidas Fegaras. Instruction Selection. Basic Blocks and Traces. Many computer architectures have instructions that do not exactly match our IR representations they do not support two-way branching as in CJUMP(op,e1,e2,l1,l2) ?

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244 views • 14 slides
COMPILERS Basic Blocks and Traces

COMPILERS Basic Blocks and Traces

COMPILERS Basic Blocks and Traces. hussein suleman uct csc3003s 2007. Evaluation Order. Its useful to evaluate the subexpressions of an expression in any order. Some IR trees can contain side effects. ESEQ and CALL can contain side effects assignment I/O

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176 views • 11 slides
COMPILERS Basic Blocks and Traces

COMPILERS Basic Blocks and Traces

COMPILERS Basic Blocks and Traces. hussein suleman uct csc3005h 2006. Evaluation Order. Its useful to evaluate the subexpressions of an expression in any order. Some IR trees can contain side effects. ESEQ and CALL can contain side effects assignment I/O

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181 views • 11 slides
COMPILERS Basic Blocks and Traces

COMPILERS Basic Blocks and Traces

COMPILERS Basic Blocks and Traces. hussein suleman uct csc305w 2004. Evaluation Order. Its useful to evaluate the subexpressions of an expression in any order. Some IR trees can contain side effects. ESEQ and CALL can contain side effects assignment I/O

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126 views • 11 slides

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