[llvm] [msan] Add debugging for handleUnknownIntrinsic (PR #123381)

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git-clang-format --diff b39c5cb6977f35ad727d86b2dd6232099734ffd3 f3a6f2f2e8306ce97d836a88e8981eb1c8b46c7c --extensions cpp -- llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 1564f4c9eb..5bea0bbd38 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -3027,13 +3027,15 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     bool success = false;
     if (NumArgOperands == 0) {
       // No-op
-    } else if (NumArgOperands == 2 && I.getArgOperand(0)->getType()->isPointerTy() &&
-        I.getArgOperand(1)->getType()->isVectorTy() &&
-        I.getType()->isVoidTy() && !I.onlyReadsMemory()) {
+    } else if (NumArgOperands == 2 &&
+               I.getArgOperand(0)->getType()->isPointerTy() &&
+               I.getArgOperand(1)->getType()->isVectorTy() &&
+               I.getType()->isVoidTy() && !I.onlyReadsMemory()) {
       // This looks like a vector store.
       success = handleVectorStoreIntrinsic(I);
-    } else if (NumArgOperands == 1 && I.getArgOperand(0)->getType()->isPointerTy() &&
-        I.getType()->isVectorTy() && I.onlyReadsMemory()) {
+    } else if (NumArgOperands == 1 &&
+               I.getArgOperand(0)->getType()->isPointerTy() &&
+               I.getType()->isVectorTy() && I.onlyReadsMemory()) {
       // This looks like a vector load.
       success = handleVectorLoadIntrinsic(I);
     } else if (I.doesNotAccessMemory())
@@ -3042,7 +3044,8 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     if (success && ClDumpStrictIntrinsics)
       dumpInst(I);
 
-    LLVM_DEBUG(dbgs() << "UNKNOWN INTRINSIC HANDLED HEURISTICALLY: " << I << "\n");
+    LLVM_DEBUG(dbgs() << "UNKNOWN INTRINSIC HANDLED HEURISTICALLY: " << I
+                      << "\n");
 
     // FIXME: detect and handle SSE maskstore/maskload
     return success;

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https://github.com/llvm/llvm-project/pull/123381