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significantly improve debug output of lsr

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36996 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-11 22:40:34 +00:00
parent 86296cca63
commit 7d8ed8a941
1 changed files with 13 additions and 6 deletions
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19
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -592,11 +592,12 @@ void BasedUser::RewriteInstructionToUseNewBase(const SCEVHandle &NewBase,
while (isa<PHINode>(InsertPt)) ++InsertPt;
}
}
Value *NewVal = InsertCodeForBaseAtPosition(NewBase, Rewriter, InsertPt, L);
// Replace the use of the operand Value with the new Phi we just created.
Inst->replaceUsesOfWith(OperandValToReplace, NewVal);
DOUT << " CHANGED: IMM =" << *Imm << " Inst = " << *Inst;
DOUT << " CHANGED: IMM =" << *Imm;
DOUT << " \tNEWBASE =" << *NewBase;
DOUT << " \tInst = " << *Inst;
return;
}
@ -1078,7 +1079,7 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
// Now that we know what we need to do, insert the PHI node itself.
//
DOUT << "INSERTING IV of TYPE " << *ReplacedTy << " of STRIDE "
<< *Stride << " and BASE " << *CommonExprs << " :\n";
<< *Stride << " and BASE " << *CommonExprs << ": ";
SCEVExpander Rewriter(*SE, *LI);
SCEVExpander PreheaderRewriter(*SE, *LI);
@ -1120,6 +1121,8 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
// Remember this in case a later stride is multiple of this.
IVsByStride[Stride].addIV(Stride, CommonExprs, NewPHI, IncV);
DOUT << " IV=%" << NewPHI->getNameStr() << " INC=%" << IncV->getNameStr();
} else {
Constant *C = dyn_cast<Constant>(CommonBaseV);
if (!C ||
@ -1130,6 +1133,7 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
CommonBaseV = new BitCastInst(CommonBaseV, CommonBaseV->getType(),
"commonbase", PreInsertPt);
}
DOUT << "\n";
// We want to emit code for users inside the loop first. To do this, we
// rearrange BasedUser so that the entries at the end have
@ -1166,12 +1170,15 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride,
while (!UsersToProcess.empty()) {
SCEVHandle Base = UsersToProcess.back().Base;
DOUT << " INSERTING code for BASE = " << *Base << ":\n";
// Emit the code for Base into the preheader.
Value *BaseV = PreheaderRewriter.expandCodeFor(Base, PreInsertPt,
ReplacedTy);
DOUT << " INSERTING code for BASE = " << *Base << ":";
if (BaseV->hasName())
DOUT << " Result value name = %" << BaseV->getNameStr();
DOUT << "\n";
// If BaseV is a constant other than 0, make sure that it gets inserted into
// the preheader, instead of being forward substituted into the uses. We do
// this by forcing a BitCast (noop cast) to be inserted into the preheader