forked from OSchip/llvm-project
40 lines
1.7 KiB
HTML
40 lines
1.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<!-- Material used from: HTML 4.01 specs: http://www.w3.org/TR/html401/ -->
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<html>
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<head>
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<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>Polly - Load Polly into clang</title>
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<link type="text/css" rel="stylesheet" href="menu.css">
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<link type="text/css" rel="stylesheet" href="content.css">
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</head>
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<body>
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<!--#include virtual="menu.html.incl"-->
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<div id="content">
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<!--=====================================================================-->
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<h1>Load Polly into clang and automatically run it at -O3</h1>
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<!--=====================================================================-->
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<p>Warning: This example makes it very easy to use Polly. Still, please be aware
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that Polly is a young research project. It is expected to crash, produce
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invalid code or to hang in complex calculations even for simple examples. In
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case you see such a problem, please check the <a href="bugs.html">Bug
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database</a> and consider reporting the bug.
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<h4>Compiling code with Polly</h4>
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To compile code with Polly you only need to add '-load
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${POLLY_BUILD_DIR}/lib/LLVMPolly.so' to your command line or your CFLAGS and
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Polly is automatically executed at -O3.
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<pre class="code">clang -load ${POLLY_BUILD_DIR}/lib/LLVMPolly.so -O3 file.c</pre>
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<h4>Automatic OpenMP code generation</h4>
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To automatically detect parallel loops and generate OpenMP code for them you
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also need to add '-mllvm -enable-polly-openmp -lgomp' to your CFLAGS.
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<pre class="code">clang -load ${POLLY_BUILD_DIR}/lib/LLVMPolly.so -O3 -mllvm -enable-polly-openmp -lgomp file.c</pre>
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</div>
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</body>
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</html>
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