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Revamp the ValueMapper interfaces in a couple ways:

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1. Take a flags argument instead of a bool.  This makes
   it more clear to the reader what it is used for.
2. Add a flag that says that "remapping a value not in the
   map is ok".
3. Reimplement MapValue to share a bunch of code and be a lot
   more efficient.  For lookup failures, don't drop null values
   into the map.
4. Using the new flag a bunch of code can vaporize in LinkModules
   and LoopUnswitch, kill it.

No functionality change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-01-08 08:15:20 +00:00
parent 6ccb365293
commit b5fa5fcecc
7 changed files with 108 additions and 166 deletions
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2
lib/Transforms/Scalar/LoopRotation.cpp
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@ -22,7 +22,6 @@
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/SSAUpdater.h"
#include "llvm/Transforms/Utils/ValueMapper.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
@ -205,6 +204,7 @@ bool LoopRotate::rotateLoop(Loop *Lp, LPPassManager &LPM) {
// Otherwise, create a duplicate of the instruction.
Instruction *C = Inst->clone();
C->setName(Inst->getName());
C->insertBefore(LoopEntryBranch);
ValueMap[Inst] = C;