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In -debug mode, dump SelectionDAGs both before and after the 

optimization passes.

llvm-svn: 42749
This commit is contained in:
Dan Gohman 2007-10-08 15:12:17 +00:00
parent ea3c73629f
commit fadf40a655
1 changed files with 7 additions and 1 deletions
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8
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -4624,10 +4624,13 @@ void SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
} }
void SelectionDAGISel::CodeGenAndEmitDAG(SelectionDAG &DAG) { void SelectionDAGISel::CodeGenAndEmitDAG(SelectionDAG &DAG) {
DOUT << "Lowered selection DAG:\n";
DEBUG(DAG.dump());
// Run the DAG combiner in pre-legalize mode. // Run the DAG combiner in pre-legalize mode.
DAG.Combine(false, *AA); DAG.Combine(false, *AA);
DOUT << "Lowered selection DAG:\n"; DOUT << "Optimized lowered selection DAG:\n";
DEBUG(DAG.dump()); DEBUG(DAG.dump());
// Second step, hack on the DAG until it only uses operations and types that // Second step, hack on the DAG until it only uses operations and types that
@ -4640,6 +4643,9 @@ void SelectionDAGISel::CodeGenAndEmitDAG(SelectionDAG &DAG) {
// Run the DAG combiner in post-legalize mode. // Run the DAG combiner in post-legalize mode.
DAG.Combine(true, *AA); DAG.Combine(true, *AA);
DOUT << "Optimized legalized selection DAG:\n";
DEBUG(DAG.dump());
if (ViewISelDAGs) DAG.viewGraph(); if (ViewISelDAGs) DAG.viewGraph();
// Third, instruction select all of the operations to machine code, adding the // Third, instruction select all of the operations to machine code, adding the