'Interference graph' presentation slideshows

CMPUT680 - Fall 2003

CMPUT680 - Fall 2003. Topic 7: Register Allocation and Instruction Scheduling José Nelson Amaral http://www.cs.ualberta.ca/~amaral/courses/680. Tiger book: chapter 10 and 11 Dragon book: chapter 10 Other papers as assigned in class or homeworks. Reading List. Register Allocation.

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Register Allocation: Graph Coloring

Register Allocation: Graph Coloring. Compiler Baojian Hua bjhua@ustc.edu.cn. Middle and Back End. translation. AST. IR1. translation. IR2. other IR and translation. asm. Back-end Structure. instruction selector. IR. Assem. register allocator. TempMap. instruction scheduler.

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SSA-Based Register Allocation

SSA-Based Register Allocation. A Start-up Example. We shall use this example to motivate SSA-based register allocation. We have seen this program before, in our previous class on register allocation. What is the maximum number of variables alive at any program point?

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Coalescing Register Allocation

Coalescing Register Allocation. CS153: Compilers Greg Morrisett. Last Time:. Basic Graph-Coloring Register Allocation Build interference graph G use liveness analysis Simplify the graph G If x has degree < k, push x and simplify G-{x} if no such x, then we need to spill some temp.

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Register Allocation

Register Allocation. btw, there are lots of examples, but I will probably forget to stop and let everyone digest or ask questions. please feel stop me if i do. Overview. Base case algorithm Optimization goals Improvements at basic block level Improvements at function level Practicalities

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Register Allocation

Register Allocation 5 Outline What is register allocation Webs Interference Graphs Graph coloring Spilling Splitting More optimizations Storing values between def and use Program computes with values value definitions (where computed) value uses (where read to compute new values)

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Register Allocation

Register Allocation. Interference graph Register allocation via graph colorability. Register Allocation: Why?. Unbounded number of temporaries and variables and bounded (very less) number of registers Temporary variables need to be replaced with some fixed set of registers

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Register Allocation by Puzzle Solving

Register Allocation by Puzzle Solving Jens Palsberg UCLA Computer Science Department University of California, Los Angeles palsberg@ucla.edu This talk Register allocation Aliased registers and pre-coloring Optimal live-range splitting produces elementary programs

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Compiler Construction

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Register Allocation

Register Allocation. Lecture 28 (from notes by G. Necula and R. Bodik). Lecture Outline. Memory Hierarchy Management Register Allocation Register interference graph Graph coloring heuristics Spilling Cache Management. The Memory Hierarchy. Registers 1 cycle 256-2000 bytes.

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Register Allocation (via graph coloring)

Register Allocation (via graph coloring). Lecture 25. Lecture Outline. Memory Hierarchy Management Register Allocation Register interference graph Graph coloring heuristics Spilling Cache Management. The Memory Hierarchy. Registers 1 cycle 256-8000 bytes.

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Optimizing Compilers CISC 673 Spring 2011 Register Allocation

Optimizing Compilers CISC 673 Spring 2011 Register Allocation. John Cavazos University of Delaware. The Memory Hierarchy. Higher = smaller, faster, more expensive, closer to CPU. registers. 8 integer, 8 floating-point; 1-cycle latency. 8K data & instructions; 2-cycle latency. L1 cache.

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Register Allocation and Spilling via Graph Coloring

Register Allocation and Spilling via Graph Coloring. G. J. Chaitin IBM Research, 1982. Motivation. Before the register allocation phase, the compiler assumes that there are an unlimited number of general purpose registers

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Symbiotic Scheduling for Shared Caches in Multi-Core Systems Using Memory Footprint Signature

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Idea of Register Allocation

Idea of Register Allocation. program:. x = m[0 ]; y = m[1 ]; xy = x*y; z = m[2 ]; yz = y*z; xz = x*z; r = xy + yz; m[3 ] = r + xz. live variable analysis result:.

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Philip Brisk

csda. csda. Optimal Polynomial-Time Interprocedural Register Allocation for High-Level Synthesis Using SSA Form. Philip Brisk. Ajay K. Verma. Paolo Ienne. Outline. Register Allocation Overview Interprocedural Register Allocation Related Work SSA Form With Launch and Landing Pads

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Optimistic Register Coalescing

Optimistic Register Coalescing. Sobeeh Almukhaizim UC San Diego Computer Science & Engineering Based on the work of: J. Park and S. Moon School of Electrical Engineering Seoul National University. Outline. Motivation and problem definition. Register Allocation Copy Coalescing

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Joint Scheduling and Channel Allocation in Wireless Mesh Networks

Joint Scheduling and Channel Allocation in Wireless Mesh Networks. Nguyen H. Tran and Choong Seon Hong. Consumer Communications and Networking Conference (CCNC), 2008. Outline. Introduction System model Fair scheduling and Channel allocation algorithm Performance evaluation Conclusion.

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Philip Brisk

Optimal Polynomial-Time Interprocedural Register Allocation for High-Level Synthesis and ASIP Design. Philip Brisk. Ajay K. Verma. Paolo Ienne. International Conference on Computer-Aided Design (ICCAD) San Jose, CA, USA November 6, 2007. Outline. Interprocedural Register Allocation

337 views • 16 slides