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add a -view-legalize-types-dags option, for viewing the dags going into legalize types.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46672 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -16,9 +16,20 @@
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#include "LegalizeTypes.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MathExtras.h"
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using namespace llvm;
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#ifndef NDEBUG
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static cl::opt<bool>
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ViewLegalizeTypesDAGs("view-legalize-types-dags", cl::Hidden,
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cl::desc("Pop up a window to show dags before legalize types"));
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#else
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static const bool ViewLegalizeTypesDAGs = 0;
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#endif
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/// run - This is the main entry point for the type legalizer. This does a
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/// top-down traversal of the dag, legalizing types as it goes.
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void DAGTypeLegalizer::run() {
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@ -438,5 +449,7 @@ void DAGTypeLegalizer::SplitOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi) {
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/// Note that this is an involved process that may invalidate pointers into
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/// the graph.
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void SelectionDAG::LegalizeTypes() {
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if (ViewLegalizeTypesDAGs) viewGraph();
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DAGTypeLegalizer(*this).run();
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}
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