[llvm] [Sink] Allow sinking of loads to distant blocks (PR #135986)

[via llvm-commits]

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@@ -27,43 +27,71 @@ using namespace llvm;
 STATISTIC(NumSunk, "Number of instructions sunk");
 STATISTIC(NumSinkIter, "Number of sinking iterations");
 
-static bool isSafeToMove(Instruction *Inst, AliasAnalysis &AA,
-                         SmallPtrSetImpl<Instruction *> &Stores) {
-
-  if (Inst->mayWriteToMemory()) {
-    Stores.insert(Inst);
-    return false;
-  }
-
+static bool hasStoreConflict(Instruction *Inst, AliasAnalysis &AA,
+                             SmallPtrSetImpl<Instruction *> &Stores) {
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LU-JOHN wrote:

Undid changes to isSafeToMove.  Save for later PR.

https://github.com/llvm/llvm-project/pull/135986