Revert "[SimpleLoopUnswitch] Preserve one PHI when removing a predecessor of a"

dianqk · dianqk · commit 5d2867be8624 · 2024-11-20T05:43:15.000+08:00
This reverts commit 6b80bdb.
diff --git a/llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp b/llvm/lib/Transforms/Scalar/SimpleLoopUnswitch.cpp
@@ -1678,7 +1678,7 @@ deleteDeadClonedBlocks(Loop &L, ArrayRef<BasicBlock *> ExitBlocks,
       if (BasicBlock *ClonedBB = cast_or_null<BasicBlock>(VMap->lookup(BB)))
         if (!DT.isReachableFromEntry(ClonedBB)) {
           for (BasicBlock *SuccBB : successors(ClonedBB))
-            SuccBB->removePredecessor(ClonedBB, /*KeepOneInputPHIs*/ true);
+            SuccBB->removePredecessor(ClonedBB);
           DeadBlocks.push_back(ClonedBB);
         }
 

Original file line number	Diff line number	Diff line change
`@@ -1678,7 +1678,7 @@ deleteDeadClonedBlocks(Loop &L, ArrayRef<BasicBlock *> ExitBlocks,`
`1678`	`1678`	`if (BasicBlock *ClonedBB = cast_or_null<BasicBlock>(VMap->lookup(BB)))`
`1679`	`1679`	`if (!DT.isReachableFromEntry(ClonedBB)) {`
`1680`	`1680`	`for (BasicBlock *SuccBB : successors(ClonedBB))`
`1681`		`- SuccBB->removePredecessor(ClonedBB, /KeepOneInputPHIs/ true);`
	`1681`	`+ SuccBB->removePredecessor(ClonedBB);`
`1682`	`1682`	`DeadBlocks.push_back(ClonedBB);`
`1683`	`1683`	`}`
`1684`	`1684`