[llvm] r343550 - [SimplifyCFG] Use Value::hasNUses instead of 'getNumUses() =='. NFCI

[Craig Topper via llvm-commits]

Author: ctopper
Date: Mon Oct  1 16:09:52 2018
New Revision: 343550

URL: http://llvm.org/viewvc/llvm-project?rev=343550&view=rev
Log:
[SimplifyCFG] Use Value::hasNUses instead of 'getNumUses() =='. NFCI

getNumUses is linear in the number of uses. Since we're looking for a specific use count, we can use hasNUses which will stop as soon as it determines there are more than N uses instead of walking all of them.

Modified:
    llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp

Modified: llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp?rev=343550&r1=343549&r2=343550&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp (original)
+++ llvm/trunk/lib/Transforms/Utils/SimplifyCFG.cpp Mon Oct  1 16:09:52 2018
@@ -2001,7 +2001,7 @@ static bool SpeculativelyExecuteBB(Branc
            I = SinkCandidateUseCounts.begin(),
            E = SinkCandidateUseCounts.end();
        I != E; ++I)
-    if (I->first->getNumUses() == I->second) {
+    if (I->first->hasNUses(I->second)) {
       ++SpeculationCost;
       if (SpeculationCost > 1)
         return false;