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[mlir] Add initial graphdef->mlir generation 

This CL adds:
  * One graphdef extracted from the TF test suite. More will come.
  * Scaffolding for the "graphdef2mlir" tool.
  * Importing of simple graphs. Type inference is not yet working, and attributes do not work either.
  * A fix for CFGFunction::~CFGFunction to not die if the function was destroyed without a terminator (for example if we exit early due to an error).

PiperOrigin-RevId: 206965992
This commit is contained in:
James Molloy 2018-08-01 11:53:50 -07:00 committed by jpienaar
parent 8eaf382734
commit f376d3c6c4
1 changed files with 2 additions and 1 deletions
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mlir/lib/IR/Function.cpp
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@ -109,6 +109,7 @@ CFGFunction::~CFGFunction() {
for (auto &bb : *this) { for (auto &bb : *this) {
for (auto &inst : bb) for (auto &inst : bb)
inst.dropAllReferences(); inst.dropAllReferences();
if (bb.getTerminator())
bb.getTerminator()->dropAllReferences(); bb.getTerminator()->dropAllReferences();
} }
} }