Fix segfault when running analysis passes after SCCP

SCCPLegacyPassWrapper runs new PM SCCPPass, which can change CFG and delete
basic blocks. The wrapper incorrectly declared DominatorTreeWrapperPass as
preserved without updating the legacy PM DomTree, leaving stale DomTree nodes
that could reference freed BBs and crash later loop analyses.

Fix by removing DomTree preservation in the SCCP wrapper so DT is invalidated
and recomputed when required.

Author: michalpaszkowski

IGC/WrapperLLVM/lib/llvmWrapper/Transforms/Scalar/SCCP.cpp

@@ -38,7 +38,6 @@ bool SCCPLegacyPassWrapper::runOnFunction(Function &F) {
 void SCCPLegacyPassWrapper::getAnalysisUsage(AnalysisUsage &AU) const {
   AU.addRequired<TargetLibraryInfoWrapperPass>();
   AU.addPreserved<GlobalsAAWrapperPass>();
-  AU.addPreserved<DominatorTreeWrapperPass>();
 }
 
 char SCCPLegacyPassWrapper::ID = 0;