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SimplifyIV comments and dead argument cleanup.

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Remove crufty comments. IVUsers hasn't been used here for a long time.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237586 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2015-05-18 16:49:31 +00:00
parent ccafe05df1
commit 688ae334a3
2 changed files with 5 additions and 7 deletions
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9
lib/Transforms/Scalar/IndVarSimplify.cpp
View File

@ -622,9 +622,8 @@ void IndVarSimplify::RewriteLoopExitValues(Loop *L, SCEVExpander &Rewriter) {
}
}
// If we were unable to completely replace the PHI node, clone the PHI
// and delete the original one. This lets IVUsers and any other maps
// purge the original user from their records.
// If we were unable to completely replace the PHI node, clone the PHI and
// delete the original one. This purges the original phi.
if (!LCSSASafePhiForRAUW) {
PHINode *NewPN = cast<PHINode>(PN->clone());
NewPN->takeName(PN);
@ -915,8 +914,8 @@ const SCEVAddRecExpr* WidenIV::GetExtendedOperandRecurrence(NarrowIVDefUse DU) {
return AddRec;
}
/// GetWideRecurrence - Is this instruction potentially interesting from
/// IVUsers' perspective after widening it's type? In other words, can the
/// GetWideRecurrence - Is this instruction potentially interesting for further
/// simplification after widening it's type? In other words, can the
/// extend be safely hoisted out of the loop with SCEV reducing the value to a
/// recurrence on the same loop. If so, return the sign or zero extended
/// recurrence. Otherwise return NULL.

3
lib/Transforms/Utils/SimplifyIndVar.cpp
View File

@ -17,7 +17,6 @@
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/IVUsers.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/ScalarEvolutionExpressions.h"
@ -55,7 +54,7 @@ namespace {
public:
SimplifyIndvar(Loop *Loop, ScalarEvolution *SE, LoopInfo *LI,
SmallVectorImpl<WeakVH> &Dead, IVUsers *IVU = nullptr)
SmallVectorImpl<WeakVH> &Dead)
: L(Loop), LI(LI), SE(SE), DeadInsts(Dead), Changed(false) {
assert(LI && "IV simplification requires LoopInfo");
}