[llvm] [SandboxVec][Scheduler][DAG] Fix the update of DGNode on setOperand (PR #214110)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.h llvm/include/llvm/Transforms/Vectorize/SandboxVectorizer/Scheduler.h llvm/lib/Transforms/Vectorize/SandboxVectorizer/DependencyGraph.cpp llvm/lib/Transforms/Vectorize/SandboxVectorizer/Scheduler.cpp llvm/unittests/Transforms/Vectorize/SandboxVectorizer/DependencyGraphTest.cpp llvm/unittests/Transforms/Vectorize/SandboxVectorizer/SchedulerTest.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/SchedulerTest.cpp b/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/SchedulerTest.cpp
index 308d3d3b4..b698707e6 100644
--- a/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/SchedulerTest.cpp
+++ b/llvm/unittests/Transforms/Vectorize/SandboxVectorizer/SchedulerTest.cpp
@@ -1110,7 +1110,6 @@ define void @foo(ptr %ptr, i8 %v0) {
 #endif
 }
 
-
 // Don't udpate the unscheduled preds if the operand is scheduled.
 TEST_F(SchedulerTest, MaintainUnscheduledPredsWhenOperandScheduled) {
   parseIR(C, R"IR(

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https://github.com/llvm/llvm-project/pull/214110