diff --git a/interpreter/llvm-project/clang/lib/Format/TokenAnnotator.cpp b/interpreter/llvm-project/clang/lib/Format/TokenAnnotator.cpp
index c1f1662481922..628fe46cc348e 100644
--- a/interpreter/llvm-project/clang/lib/Format/TokenAnnotator.cpp
+++ b/interpreter/llvm-project/clang/lib/Format/TokenAnnotator.cpp
@@ -5159,9 +5159,11 @@ bool TokenAnnotator::mustBreakBefore(const AnnotatedLine &Line,
     return true;
   if (Left.IsUnterminatedLiteral)
     return true;
-  if (Right.is(tok::lessless) && Right.Next && Left.is(tok::string_literal) &&
-      Right.Next->is(tok::string_literal)) {
-    return true;
+  if (const auto *BeforeLeft = Left.Previous, *AfterRight = Right.Next;
+      BeforeLeft && BeforeLeft->is(tok::lessless) &&
+      Left.is(tok::string_literal) && Right.is(tok::lessless) && AfterRight &&
+      AfterRight->is(tok::string_literal)) {
+    return Right.NewlinesBefore > 0;
   }
   if (Right.is(TT_RequiresClause)) {
     switch (Style.RequiresClausePosition) {
diff --git a/interpreter/llvm-project/clang/lib/Format/UnwrappedLineParser.cpp b/interpreter/llvm-project/clang/lib/Format/UnwrappedLineParser.cpp
index f70affb732a0d..179d77bf00491 100644
--- a/interpreter/llvm-project/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/interpreter/llvm-project/clang/lib/Format/UnwrappedLineParser.cpp
@@ -1185,12 +1185,6 @@ void UnwrappedLineParser::parsePPDefine() {
     return;
   }
 
-  if (FormatTok->is(tok::identifier) &&
-      Tokens->peekNextToken()->is(tok::colon)) {
-    nextToken();
-    nextToken();
-  }
-
   // Errors during a preprocessor directive can only affect the layout of the
   // preprocessor directive, and thus we ignore them. An alternative approach
   // would be to use the same approach we use on the file level (no
@@ -1671,7 +1665,8 @@ void UnwrappedLineParser::parseStructuralElement(
     if (!Style.isJavaScript() && !Style.isVerilog() && !Style.isTableGen() &&
         Tokens->peekNextToken()->is(tok::colon) && !Line->MustBeDeclaration) {
       nextToken();
-      Line->Tokens.begin()->Tok->MustBreakBefore = true;
+      if (!Line->InMacroBody || CurrentLines->size() > 1)
+        Line->Tokens.begin()->Tok->MustBreakBefore = true;
       FormatTok->setFinalizedType(TT_GotoLabelColon);
       parseLabel(!Style.IndentGotoLabels);
       if (HasLabel)
diff --git a/interpreter/llvm-project/llvm-project.tag b/interpreter/llvm-project/llvm-project.tag
index 67e35cd34f6ce..79540edf8d75c 100644
--- a/interpreter/llvm-project/llvm-project.tag
+++ b/interpreter/llvm-project/llvm-project.tag
@@ -1 +1 @@
-ROOT-llvm18-20240821-01
+ROOT-llvm18-20250110-01
diff --git a/interpreter/llvm-project/llvm/CMakeLists.txt b/interpreter/llvm-project/llvm/CMakeLists.txt
index 99b252ae7abe2..b49f594908a8f 100644
--- a/interpreter/llvm-project/llvm/CMakeLists.txt
+++ b/interpreter/llvm-project/llvm/CMakeLists.txt
@@ -22,7 +22,7 @@ if(NOT DEFINED LLVM_VERSION_MINOR)
   set(LLVM_VERSION_MINOR 1)
 endif()
 if(NOT DEFINED LLVM_VERSION_PATCH)
-  set(LLVM_VERSION_PATCH 6)
+  set(LLVM_VERSION_PATCH 8)
 endif()
 if(NOT DEFINED LLVM_VERSION_SUFFIX)
   set(LLVM_VERSION_SUFFIX)
diff --git a/interpreter/llvm-project/llvm/lib/Target/PowerPC/PPCMergeStringPool.cpp b/interpreter/llvm-project/llvm/lib/Target/PowerPC/PPCMergeStringPool.cpp
index ebd876d50c44e..0830b02370cd0 100644
--- a/interpreter/llvm-project/llvm/lib/Target/PowerPC/PPCMergeStringPool.cpp
+++ b/interpreter/llvm-project/llvm/lib/Target/PowerPC/PPCMergeStringPool.cpp
@@ -290,13 +290,6 @@ bool PPCMergeStringPool::mergeModuleStringPool(Module &M) {
   return true;
 }
 
-static bool userHasOperand(User *TheUser, GlobalVariable *GVOperand) {
-  for (Value *Op : TheUser->operands())
-    if (Op == GVOperand)
-      return true;
-  return false;
-}
-
 // For pooled strings we need to add the offset into the pool for each string.
 // This is done by adding a Get Element Pointer (GEP) before each user. This
 // function adds the GEP.
@@ -307,29 +300,13 @@ void PPCMergeStringPool::replaceUsesWithGEP(GlobalVariable *GlobalToReplace,
   Indices.push_back(ConstantInt::get(Type::getInt32Ty(*Context), 0));
   Indices.push_back(ConstantInt::get(Type::getInt32Ty(*Context), ElementIndex));
 
-  // Need to save a temporary copy of each user list because we remove uses
-  // as we replace them.
-  SmallVector<User *> Users;
-  for (User *CurrentUser : GlobalToReplace->users())
-    Users.push_back(CurrentUser);
-
-  for (User *CurrentUser : Users) {
-    // The user was not found so it must have been replaced earlier.
-    if (!userHasOperand(CurrentUser, GlobalToReplace))
-      continue;
-
-    // We cannot replace operands in globals so we ignore those.
-    if (isa<GlobalValue>(CurrentUser))
-      continue;
-
-    Constant *ConstGEP = ConstantExpr::getInBoundsGetElementPtr(
-        PooledStructType, GPool, Indices);
-    LLVM_DEBUG(dbgs() << "Replacing this global:\n");
-    LLVM_DEBUG(GlobalToReplace->dump());
-    LLVM_DEBUG(dbgs() << "with this:\n");
-    LLVM_DEBUG(ConstGEP->dump());
-    GlobalToReplace->replaceAllUsesWith(ConstGEP);
-  }
+  Constant *ConstGEP =
+      ConstantExpr::getInBoundsGetElementPtr(PooledStructType, GPool, Indices);
+  LLVM_DEBUG(dbgs() << "Replacing this global:\n");
+  LLVM_DEBUG(GlobalToReplace->dump());
+  LLVM_DEBUG(dbgs() << "with this:\n");
+  LLVM_DEBUG(ConstGEP->dump());
+  GlobalToReplace->replaceAllUsesWith(ConstGEP);
 }
 
 } // namespace
diff --git a/interpreter/llvm-project/llvm/utils/lit/lit/__init__.py b/interpreter/llvm-project/llvm/utils/lit/lit/__init__.py
index d8b0e3bd1c69e..800d59492d8ff 100644
--- a/interpreter/llvm-project/llvm/utils/lit/lit/__init__.py
+++ b/interpreter/llvm-project/llvm/utils/lit/lit/__init__.py
@@ -2,7 +2,7 @@
 
 __author__ = "Daniel Dunbar"
 __email__ = "daniel@minormatter.com"
-__versioninfo__ = (18, 1, 6)
+__versioninfo__ = (18, 1, 8)
 __version__ = ".".join(str(v) for v in __versioninfo__) + "dev"
 
 __all__ = []