'Basic blocks' diaporamas de présentation

Advanced Compiler Techniques

Advanced Compiler Techniques. Control Flow Analysis & Local Optimizations. LIU Xianhua School of EECS, Peking University. Levels of Optimizations. Local inside a basic block Global (intraprocedural) Across basic blocks Whole procedure analysis Interprocedural Across procedures

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Computer Architecture Out-of-order Execution

Computer Architecture Out-of-order Execution. By Yoav Etsion With acknowledgement to Dan Tsafrir , Avi Mendelson , Lihu Rappoport , and Adi Yoaz. The need for speed: Superscalar. Remember our goal: minimize CPU Time CPU Time = duration of clock cycle ? CPI ? IC

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Detecting Bugs In Binaries Using Decompilation and Data Flow Analysis

Silvio Cesare <silvio.cesare@gmail.com>. Detecting Bugs In Binaries Using Decompilation and Data Flow Analysis. Who am I and where did this talk come from?. Ph.D. Student at Deakin University Book Author This talk covers some of my Ph.D. research. Introduction.

594 views • 48 slides

Android runtime environment the dalkvik vm and jit optimizatiOns

Android runtime environment the dalkvik vm and jit optimizatiOns. Neeraja Ramanan COMS 6998: Advanced topics in Prog . Lang and Compilers. Overview. A brief (yet, hopefully comprehensive) overview of Android Runtime system Nice to know Keeping in mind the audience, keeping it brief

595 views • 46 slides

Instruction-Level Parallelism compiler techniques and branch prediction

Instruction-Level Parallelism compiler techniques and branch prediction . prepared and Instructed by Shmuel Wimer Eng. Faculty, Bar-Ilan University. Concepts and Challenges. The potential overlap among instructions is called instruction-level parallelism ( ILP ).

495 views • 32 slides

Dynamic Branch Prediction

Dynamic Branch Prediction. Ali Azarpeyvand. Tomasulo Review. Reservations stations: renaming to larger set of registers + buffering source operands Prevents registers as bottleneck Avoids WAR, WAW hazards of Scoreboard Allows loop unrolling in HW

611 views • 30 slides

White Box vs. Black Box Testing

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Modular Verification of Assembly Code with Stack-Based Control Abstractions

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cyclomatric complexity

cyclomatric complexity. software metric. Agent program is the one part(class)of Othello program. How many test cases do you have to test? . Reversi [Othello].

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Code Optimization

Code Optimization. Potential Improvement. Intermediate Form of the Program. Representation of the executable instructions with a sequence of quadruples: operation, op1, op2, result For example:. Intermediate Code. Quadruple Analysis for Code Optimization.

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Improving code generation

Improving code generation. Better code generation requires greater context. Over expressions : optimal ordering of subtrees Over basic blocks : Common subexpression elimination Register tracking with last-use information Over procedures : global register allocation, register coloring

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Lecture 6: Compilers, the SPIM Simulator

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Instrumentation with Relocatable Program Code

Instrumentation with Relocatable Program Code. Tugrul Ince Department of Computer Science University of Maryland, College Park, MD 20742. Code Patching. void BZ2_blockSort ( EState * s ) {. UInt32* ptr = s-> ptr ; UChar * block = s->block; UInt32* ftab = s-> ftab ;

322 views • 18 slides

Global optimization

Global optimization. Honors Compilers April 16 th 2002. Data flow analysis. To generate better code, need to examine definitions and uses of variables beyond basic blocks. With use-definition information, various optimizing transformations can be performed: Common subexpression elimination

279 views • 16 slides

Analysis of Complex D ata S tructures with PEX

Analysis of Complex D ata S tructures with PEX. Vadim Mutilin Evgeniy Gerlits Vladimir Fedotov Mentor: Patrice Godefroid. Microsoft Pex. White box test generation for .NET Implements DART (Directed Automated Random Testing): combines concrete and symbolic executions

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TARGET CODE GENERATION

TARGET CODE GENERATION. A basic block is a sequence of consecutive statements in which flow of control enters at the beginning and exit at the end. Transformation on Basic Blocks. Structure preserving transformation: 1. Common sub-expression elimination . Consider the basic block

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Chapter 2

Chapter 2. CSF 2009 The MIPS Assembly Language: Programming Structures. Basic Blocks. A basic block is a sequence of instructions with No embedded branches (except at end) No branch targets (except at beginning). A compiler identifies basic blocks for optimization

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