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Add debugging information
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21781 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -27,6 +27,7 @@
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#include "llvm/Instructions.h"
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#include "llvm/Pass.h"
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#include "llvm/Type.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/ADT/PostOrderIterator.h"
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@ -498,6 +499,17 @@ void Reassociate::OptimizeExpression(unsigned Opcode,
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OptimizeExpression(Opcode, Ops);
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}
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/// PrintOps - Print out the expression identified in the Ops list.
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///
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static void PrintOps(unsigned Opcode, const std::vector<ValueEntry> &Ops,
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BasicBlock *BB) {
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Module *M = BB->getParent()->getParent();
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std::cerr << Instruction::getOpcodeName(Opcode) << " "
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<< *Ops[0].Op->getType();
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for (unsigned i = 0, e = Ops.size(); i != e; ++i)
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WriteAsOperand(std::cerr << " ", Ops[i].Op, false, true, M)
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<< "," << Ops[i].Rank;
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}
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/// ReassociateBB - Inspect all of the instructions in this basic block,
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/// reassociating them as we go.
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@ -530,6 +542,9 @@ void Reassociate::ReassociateBB(BasicBlock *BB) {
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std::vector<ValueEntry> Ops;
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LinearizeExprTree(I, Ops);
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DEBUG(std::cerr << "RAIn:\t"; PrintOps(I->getOpcode(), Ops, BB);
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std::cerr << "\n");
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// Now that we have linearized the tree to a list and have gathered all of
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// the operands and their ranks, sort the operands by their rank. Use a
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// stable_sort so that values with equal ranks will have their relative
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@ -542,6 +557,9 @@ void Reassociate::ReassociateBB(BasicBlock *BB) {
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// sorted form, optimize it globally if possible.
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OptimizeExpression(I->getOpcode(), Ops);
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DEBUG(std::cerr << "RAOut:\t"; PrintOps(I->getOpcode(), Ops, BB);
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std::cerr << "\n");
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if (Ops.size() == 1) {
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// This expression tree simplified to something that isn't a tree,
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// eliminate it.
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