[Statepoints] Clean up PlaceSafepoints.cpp: variable naming.

Use CamelCase.  NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236673 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/PlaceSafepoints.cpp

@@ -882,36 +882,35 @@ static Value *ReplaceWithStatepoint(const CallSite &CS, /* to replace */
   // immediately before the previous instruction under the assumption that all
   // arguments will be available here.  We can't insert afterwards since we may
   // be replacing a terminator.
-  Instruction *insertBefore = CS.getInstruction();
-  IRBuilder<> Builder(insertBefore);
+  IRBuilder<> Builder(CS.getInstruction());
 
   // Note: The gc args are not filled in at this time, that's handled by
   // RewriteStatepointsForGC (which is currently under review).
 
   // Create the statepoint given all the arguments
-  Instruction *token = nullptr;
-  AttributeSet return_attributes;
+  Instruction *Token = nullptr;
+  AttributeSet ReturnAttrs;
   if (CS.isCall()) {
-    CallInst *toReplace = cast<CallInst>(CS.getInstruction());
+    CallInst *ToReplace = cast<CallInst>(CS.getInstruction());
     CallInst *Call = Builder.CreateGCStatepointCall(
         CS.getCalledValue(), makeArrayRef(CS.arg_begin(), CS.arg_end()), None,
         None, "safepoint_token");
-    Call->setTailCall(toReplace->isTailCall());
-    Call->setCallingConv(toReplace->getCallingConv());
+    Call->setTailCall(ToReplace->isTailCall());
+    Call->setCallingConv(ToReplace->getCallingConv());
 
     // Before we have to worry about GC semantics, all attributes are legal
-    AttributeSet new_attrs = toReplace->getAttributes();
+    AttributeSet OriginalAttrs = ToReplace->getAttributes();
     // In case if we can handle this set of sttributes - set up function attrs
     // directly on statepoint and return attrs later for gc_result intrinsic.
-    Call->setAttributes(new_attrs.getFnAttributes());
-    return_attributes = new_attrs.getRetAttributes();
+    Call->setAttributes(OriginalAttrs.getFnAttributes());
+    ReturnAttrs = OriginalAttrs.getRetAttributes();
     // TODO: handle param attributes
 
-    token = Call;
+    Token = Call;
 
     // Put the following gc_result and gc_relocate calls immediately after the
     // the old call (which we're about to delete)
-    BasicBlock::iterator next(toReplace);
+    BasicBlock::iterator next(ToReplace);
     assert(BB->end() != next && "not a terminator, must have next");
     next++;
     Instruction *IP = &*(next);
@@ -919,48 +918,47 @@ static Value *ReplaceWithStatepoint(const CallSite &CS, /* to replace */
     Builder.SetCurrentDebugLocation(IP->getDebugLoc());
 
   } else if (CS.isInvoke()) {
-    InvokeInst *toReplace = cast<InvokeInst>(CS.getInstruction());
+    InvokeInst *ToReplace = cast<InvokeInst>(CS.getInstruction());
 
     // Insert the new invoke into the old block.  We'll remove the old one in a
     // moment at which point this will become the new terminator for the
     // original block.
-    Builder.SetInsertPoint(toReplace->getParent());
-    InvokeInst *invoke = Builder.CreateGCStatepointInvoke(
-        CS.getCalledValue(), toReplace->getNormalDest(),
-        toReplace->getUnwindDest(), makeArrayRef(CS.arg_begin(), CS.arg_end()),
+    Builder.SetInsertPoint(ToReplace->getParent());
+    InvokeInst *Invoke = Builder.CreateGCStatepointInvoke(
+        CS.getCalledValue(), ToReplace->getNormalDest(),
+        ToReplace->getUnwindDest(), makeArrayRef(CS.arg_begin(), CS.arg_end()),
         Builder.getInt32(0), None, "safepoint_token");
 
     // Currently we will fail on parameter attributes and on certain
     // function attributes.
-    AttributeSet new_attrs = toReplace->getAttributes();
+    AttributeSet OriginalAttrs = ToReplace->getAttributes();
     // In case if we can handle this set of sttributes - set up function attrs
     // directly on statepoint and return attrs later for gc_result intrinsic.
-    invoke->setAttributes(new_attrs.getFnAttributes());
-    return_attributes = new_attrs.getRetAttributes();
+    Invoke->setAttributes(OriginalAttrs.getFnAttributes());
+    ReturnAttrs = OriginalAttrs.getRetAttributes();
 
-    token = invoke;
+    Token = Invoke;
 
     // We'll insert the gc.result into the normal block
-    BasicBlock *normalDest = normalizeBBForInvokeSafepoint(
-        toReplace->getNormalDest(), invoke->getParent());
-    Instruction *IP = &*(normalDest->getFirstInsertionPt());
+    BasicBlock *NormalDest = normalizeBBForInvokeSafepoint(
+        ToReplace->getNormalDest(), Invoke->getParent());
+    Instruction *IP = &*(NormalDest->getFirstInsertionPt());
     Builder.SetInsertPoint(IP);
   } else {
     llvm_unreachable("unexpect type of CallSite");
   }
-  assert(token);
+  assert(Token);
 
   // Handle the return value of the original call - update all uses to use a
   // gc_result hanging off the statepoint node we just inserted
 
   // Only add the gc_result iff there is actually a used result
   if (!CS.getType()->isVoidTy() && !CS.getInstruction()->use_empty()) {
-    std::string takenName =
-      CS.getInstruction()->hasName() ? CS.getInstruction()->getName() : "";
-    CallInst *gc_result =
-        Builder.CreateGCResult(token, CS.getType(), takenName);
-    gc_result->setAttributes(return_attributes);
-    return gc_result;
+    std::string TakenName =
+        CS.getInstruction()->hasName() ? CS.getInstruction()->getName() : "";
+    CallInst *GCResult = Builder.CreateGCResult(Token, CS.getType(), TakenName);
+    GCResult->setAttributes(ReturnAttrs);
+    return GCResult;
   } else {
     // No return value for the call.
     return nullptr;