Revert "[InstCombine] Improve TryToSinkInstruction with multiple uses"

This reverts commit 4ac4e52189aa6d80c3d59dc2c8f7dcc0cb7f9d58.
There are couple of test failures, which needs update of the test cases.

Doing a clean revert and will recommit the change along with fixed
testcases.

1 files changed, 0 insertions, 12 deletions

diff --git a/llvm/lib/IR/Value.cpp b/llvm/lib/IR/Value.cpp
index 7d2d73a..da67da1 100644
--- a/llvm/lib/IR/Value.cpp
+++ b/llvm/lib/IR/Value.cpp
@@ -176,18 +176,6 @@ Use *Value::getSingleUndroppableUse() {
   return Result;
 }
 
-User *Value::getUniqueUndroppableUser() {
-  User *Result = nullptr;
-  for (auto *U : users()) {
-    if (!U->isDroppable()) {
-      if (Result && Result != U)
-        return nullptr;
-      Result = U;
-    }
-  }
-  return Result;
-}
-
 bool Value::hasNUndroppableUses(unsigned int N) const {
   return hasNItems(user_begin(), user_end(), N, isUnDroppableUser);
 }