Update reverse_iterator use to match llvm r280032.

bob-wilson · bob-wilson · commit 872276e82171 · 2016-12-01T10:47:21.000-08:00
(cherry picked from commit 33530d8)
diff --git a/lib/SILOptimizer/Mandatory/GuaranteedARCOpts.cpp b/lib/SILOptimizer/Mandatory/GuaranteedARCOpts.cpp
@@ -32,8 +32,7 @@ struct GuaranteedARCOptsVisitor
 
 static SILBasicBlock::reverse_iterator
 getPrevReverseIterator(SILInstruction *I) {
-  auto Iter = std::next(I->getIterator());
-  return std::next(SILBasicBlock::reverse_iterator(Iter));
+  return std::next(I->getIterator().getReverse());
 }
 
 bool GuaranteedARCOptsVisitor::visitDestroyAddrInst(DestroyAddrInst *DAI) {

Original file line number	Diff line number	Diff line change
`@@ -32,8 +32,7 @@ struct GuaranteedARCOptsVisitor`
`32`	`32`
`33`	`33`	`static SILBasicBlock::reverse_iterator`
`34`	`34`	`getPrevReverseIterator(SILInstruction *I) {`
`35`		`- auto Iter = std::next(I->getIterator());`
`36`		`- return std::next(SILBasicBlock::reverse_iterator(Iter));`
	`35`	`+ return std::next(I->getIterator().getReverse());`
`37`	`36`	`}`
`38`	`37`
`39`	`38`	`bool GuaranteedARCOptsVisitor::visitDestroyAddrInst(DestroyAddrInst *DAI) {`