ADT/STLExtras: Introduce llvm::empty; NFC

This is modeled after C++17 std::empty().

Differential Revision: https://reviews.llvm.org/D53909

llvm-svn: 345679

2 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/Utils/PredicateInfo.cpp b/llvm/lib/Transforms/Utils/PredicateInfo.cpp
index 9d9624850fb..585ce6b4c11 100644
--- a/llvm/lib/Transforms/Utils/PredicateInfo.cpp
+++ b/llvm/lib/Transforms/Utils/PredicateInfo.cpp
@@ -522,7 +522,7 @@ Value *PredicateInfo::materializeStack(unsigned int &Counter,
     if (isa<PredicateWithEdge>(ValInfo)) {
       IRBuilder<> B(getBranchTerminator(ValInfo));
       Function *IF = getCopyDeclaration(F.getParent(), Op->getType());
-      if (IF->user_begin() == IF->user_end())
+      if (empty(IF->users()))
         CreatedDeclarations.insert(IF);
       CallInst *PIC =
           B.CreateCall(IF, Op, Op->getName() + "." + Twine(Counter++));
@@ -534,7 +534,7 @@ Value *PredicateInfo::materializeStack(unsigned int &Counter,
              "Should not have gotten here without it being an assume");
       IRBuilder<> B(PAssume->AssumeInst);
       Function *IF = getCopyDeclaration(F.getParent(), Op->getType());
-      if (IF->user_begin() == IF->user_end())
+      if (empty(IF->users()))
         CreatedDeclarations.insert(IF);
       CallInst *PIC = B.CreateCall(IF, Op);
       PredicateMap.insert({PIC, ValInfo});
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index dd0d441a4da..849f9ee1d19 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -5260,7 +5260,7 @@ static bool SwitchToLookupTable(SwitchInst *SI, IRBuilder<> &Builder,
 
   // Figure out the corresponding result for each case value and phi node in the
   // common destination, as well as the min and max case values.
-  assert(SI->case_begin() != SI->case_end());
+  assert(!empty(SI->cases()));
   SwitchInst::CaseIt CI = SI->case_begin();
   ConstantInt *MinCaseVal = CI->getCaseValue();
   ConstantInt *MaxCaseVal = CI->getCaseValue();