This is an archive of the discontinued LLVM Phabricator instance.

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	passes. One of the main features of the LLVM Pass Framework is that it			passes. One of the main features of the LLVM Pass Framework is that it
	schedules passes to run in an efficient way based on the constraints that your			schedules passes to run in an efficient way based on the constraints that your
	pass meets (which are indicated by which class they derive from).			pass meets (which are indicated by which class they derive from).

	We start by showing you how to construct a pass, everything from setting up the			We start by showing you how to construct a pass, everything from setting up the
	code, to compiling, loading, and executing it. After the basics are down, more			code, to compiling, loading, and executing it. After the basics are down, more
	advanced features are discussed.			advanced features are discussed.

	This document deals with the legacy pass manager. LLVM is transitioning to			.. warning::
	the new pass manager, which has its own way of defining passes. For more			This document deals with the legacy pass manager. LLVM now uses the new
	details, see :doc:`WritingAnLLVMNewPMPass`.			pass manager by default, which has its own way of defining passes. For more
				details, see :doc:`WritingAnLLVMNewPMPass`. To use the legacy pass manager
				with ``opt``, pass the ``-enable-new-pm=0`` flag to all ``opt``
				invocations.

	Quick Start --- Writing hello world			Quick Start --- Writing hello world
	===================================			===================================

	Here we describe how to write the "hello world" of passes. The "Hello" pass is			Here we describe how to write the "hello world" of passes. The "Hello" pass is
	designed to simply print out the name of non-external functions that exist in			designed to simply print out the name of non-external functions that exist in
	the program being compiled. It does not modify the program at all, it just			the program being compiled. It does not modify the program at all, it just
	inspects it. The source code and files for this pass are available in the LLVM			inspects it. The source code and files for this pass are available in the LLVM
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This is an archive of the discontinued LLVM Phabricator instance.

[docs] Make clearer in WritingAnLLVMPass that the legacy PM isn't the defaultClosedPublic

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[docs] Make clearer in WritingAnLLVMPass that the legacy PM isn't the default
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