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significantly improve debug output of lsr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36996 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -592,11 +592,12 @@ void BasedUser::RewriteInstructionToUseNewBase(const SCEVHandle &NewBase,
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while (isa<PHINode>(InsertPt)) ++InsertPt;
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}
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}
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Value *NewVal = InsertCodeForBaseAtPosition(NewBase, Rewriter, InsertPt, L);
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// Replace the use of the operand Value with the new Phi we just created.
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Inst->replaceUsesOfWith(OperandValToReplace, NewVal);
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DOUT << " CHANGED: IMM =" << *Imm << " Inst = " << *Inst;
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DOUT << " CHANGED: IMM =" << *Imm;
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DOUT << " \tNEWBASE =" << *NewBase;
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DOUT << " \tInst = " << *Inst;
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return;
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}
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@ -1078,7 +1079,7 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
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// Now that we know what we need to do, insert the PHI node itself.
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//
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DOUT << "INSERTING IV of TYPE " << *ReplacedTy << " of STRIDE "
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<< *Stride << " and BASE " << *CommonExprs << " :\n";
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<< *Stride << " and BASE " << *CommonExprs << ": ";
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SCEVExpander Rewriter(*SE, *LI);
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SCEVExpander PreheaderRewriter(*SE, *LI);
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@ -1120,6 +1121,8 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
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// Remember this in case a later stride is multiple of this.
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IVsByStride[Stride].addIV(Stride, CommonExprs, NewPHI, IncV);
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DOUT << " IV=%" << NewPHI->getNameStr() << " INC=%" << IncV->getNameStr();
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} else {
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Constant *C = dyn_cast<Constant>(CommonBaseV);
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if (!C ||
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@ -1130,6 +1133,7 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
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CommonBaseV = new BitCastInst(CommonBaseV, CommonBaseV->getType(),
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"commonbase", PreInsertPt);
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}
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DOUT << "\n";
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// We want to emit code for users inside the loop first. To do this, we
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// rearrange BasedUser so that the entries at the end have
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@ -1166,12 +1170,15 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
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while (!UsersToProcess.empty()) {
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SCEVHandle Base = UsersToProcess.back().Base;
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DOUT << " INSERTING code for BASE = " << *Base << ":\n";
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// Emit the code for Base into the preheader.
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Value *BaseV = PreheaderRewriter.expandCodeFor(Base, PreInsertPt,
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ReplacedTy);
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DOUT << " INSERTING code for BASE = " << *Base << ":";
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if (BaseV->hasName())
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DOUT << " Result value name = %" << BaseV->getNameStr();
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DOUT << "\n";
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// If BaseV is a constant other than 0, make sure that it gets inserted into
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// the preheader, instead of being forward substituted into the uses. We do
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// this by forcing a BitCast (noop cast) to be inserted into the preheader
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