Luke Drummond 9d4842251c Allow runtimes to execute custom LLVM ModulePasses over the expression IR ...

During expression evaluation, the ClangExpressionParser preforms a
number of hard-coded fixups on the expression's IR before the module
is assembled and dispatched to be run in a ThreadPlan.

This patch allows the runtimes to register LLVM passes to be run over the
generated IR, that they may perform language or architecture-specfic fixups
or analyses over the generated expression.

This makes expression evaluation for plugins more flexible and allows
language-specific fixes to reside in their own module, rather than
littering the expression evaluator itself with language-specific fixes.

llvm-svn: 272800

2016-06-15 16:19:46 +00:00

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