[llvm] r179964 - [objc-arc] Refactored OptimizeReturns so that it uses continue instead of a large multi-level nested if statement.
Michael Gottesman
mgottesman at apple.com
Sat Apr 20 17:25:01 PDT 2013
Author: mgottesman
Date: Sat Apr 20 19:25:01 2013
New Revision: 179964
URL: http://llvm.org/viewvc/llvm-project?rev=179964&view=rev
Log:
[objc-arc] Refactored OptimizeReturns so that it uses continue instead of a large multi-level nested if statement.
Modified:
llvm/trunk/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
Modified: llvm/trunk/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/ObjCARC/ObjCARCOpts.cpp?rev=179964&r1=179963&r2=179964&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/ObjCARC/ObjCARCOpts.cpp (original)
+++ llvm/trunk/lib/Transforms/ObjCARC/ObjCARCOpts.cpp Sat Apr 20 19:25:01 2013
@@ -2965,34 +2965,39 @@ void ObjCARCOpt::OptimizeReturns(Functio
FindPredecessorAutoreleaseWithSafePath(Arg, BB, Ret,
DependingInstructions, Visited,
PA);
- if (Autorelease) {
- DependingInstructions.clear();
- Visited.clear();
-
- CallInst *Retain =
- FindPredecessorRetainWithSafePath(Arg, BB, Autorelease,
- DependingInstructions, Visited, PA);
- if (Retain) {
- DependingInstructions.clear();
- Visited.clear();
-
- // Check that there is nothing that can affect the reference count
- // between the retain and the call. Note that Retain need not be in BB.
- if (HasSafePathToPredecessorCall(Arg, Retain, DependingInstructions,
- Visited, PA)) {
- // If so, we can zap the retain and autorelease.
- Changed = true;
- ++NumRets;
- DEBUG(dbgs() << "Erasing: " << *Retain << "\nErasing: "
- << *Autorelease << "\n");
- EraseInstruction(Retain);
- EraseInstruction(Autorelease);
- }
- }
- }
+ DependingInstructions.clear();
+ Visited.clear();
+
+ if (!Autorelease)
+ continue;
+ CallInst *Retain =
+ FindPredecessorRetainWithSafePath(Arg, BB, Autorelease,
+ DependingInstructions, Visited, PA);
DependingInstructions.clear();
Visited.clear();
+
+ if (!Retain)
+ continue;
+
+ // Check that there is nothing that can affect the reference count
+ // between the retain and the call. Note that Retain need not be in BB.
+ bool HasSafePathToCall = HasSafePathToPredecessorCall(Arg, Retain,
+ DependingInstructions,
+ Visited, PA);
+ DependingInstructions.clear();
+ Visited.clear();
+
+ if (!HasSafePathToCall)
+ continue;
+
+ // If so, we can zap the retain and autorelease.
+ Changed = true;
+ ++NumRets;
+ DEBUG(dbgs() << "Erasing: " << *Retain << "\nErasing: "
+ << *Autorelease << "\n");
+ EraseInstruction(Retain);
+ EraseInstruction(Autorelease);
}
}
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