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-=pod
-
-=head1 NAME
-
-llvm-diff - LLVM structural 'diff'
-
-=head1 SYNOPSIS
-
-B<llvm-diff> [I<options>] I<module 1> I<module 2> [I<global name ...>]
-
-=head1 DESCRIPTION
-
-B<llvm-diff> compares the structure of two LLVM modules, primarily
-focusing on differences in function definitions. Insignificant
-differences, such as changes in the ordering of globals or in the
-names of local values, are ignored.
-
-An input module will be interpreted as an assembly file if its name
-ends in '.ll'; otherwise it will be read in as a bitcode file.
-
-If a list of global names is given, just the values with those names
-are compared; otherwise, all global values are compared, and
-diagnostics are produced for globals which only appear in one module
-or the other.
-
-B<llvm-diff> compares two functions by comparing their basic blocks,
-beginning with the entry blocks. If the terminators seem to match,
-then the corresponding successors are compared; otherwise they are
-ignored. This algorithm is very sensitive to changes in control flow,
-which tend to stop any downstream changes from being detected.
-
-B<llvm-diff> is intended as a debugging tool for writers of LLVM
-passes and frontends. It does not have a stable output format.
-
-=head1 EXIT STATUS
-
-If B<llvm-diff> finds no differences between the modules, it will exit
-with 0 and produce no output. Otherwise it will exit with a non-zero
-value.
-
-=head1 BUGS
-
-Many important differences, like changes in linkage or function
-attributes, are not diagnosed.
-
-Changes in memory behavior (for example, coalescing loads) can cause
-massive detected differences in blocks.
-
-=head1 AUTHORS
-
-Maintained by the LLVM Team (L<http://llvm.org/>).
-
-=cut