Fix a fixme in CondPropagate.cpp by moving a PhiNode optimization into

BasicBlock's removePredecessor routine.  This requires shuffling around
the definition and implementation of hasContantValue from Utils.h,cpp into
Instructions.h,cpp


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22664 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 3 deletions

diff --git a/lib/Transforms/Utils/LoopSimplify.cpp b/lib/Transforms/Utils/LoopSimplify.cpp
index 3e4312681d..5ddcc4163d 100644
--- a/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/lib/Transforms/Utils/LoopSimplify.cpp
@@ -41,7 +41,6 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Support/CFG.h"
-#include "llvm/Transforms/Utils/Local.h"
 #include "llvm/ADT/SetOperations.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/Statistic.h"
@@ -257,7 +256,7 @@ BasicBlock *LoopSimplify::SplitBlockPredecessors(BasicBlock *BB,
       PN->addIncoming(InVal, NewBB);
 
       // Can we eliminate this phi node now?
-      if (Value *V = hasConstantValue(PN)) {
+      if (Value *V = PN->hasConstantValue()) {
         if (!isa<Instruction>(V) ||
             getAnalysis<DominatorSet>().dominates(cast<Instruction>(V), PN)) {
           PN->replaceAllUsesWith(V);
@@ -443,7 +442,7 @@ static PHINode *FindPHIToPartitionLoops(Loop *L, DominatorSet &DS,
   for (BasicBlock::iterator I = L->getHeader()->begin(); isa<PHINode>(I); ) {
     PHINode *PN = cast<PHINode>(I);
     ++I;
-    if (Value *V = hasConstantValue(PN))
+    if (Value *V = PN->hasConstantValue())
       if (!isa<Instruction>(V) || DS.dominates(cast<Instruction>(V), PN)) {
         // This is a degenerate PHI already, don't modify it!
         PN->replaceAllUsesWith(V);