[llvm] [NVPTX] Cleanup NVPTXLowerArgs, simplifying logic and improving alignment propagation (PR #180286)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Target/NVPTX/NVPTXISelLowering.cpp llvm/lib/Target/NVPTX/NVPTXLowerArgs.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/NVPTX/NVPTXLowerArgs.cpp b/llvm/lib/Target/NVPTX/NVPTXLowerArgs.cpp
index 4773e293c..aa7f60a84 100644
--- a/llvm/lib/Target/NVPTX/NVPTXLowerArgs.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXLowerArgs.cpp
@@ -257,9 +257,8 @@ static void convertToParamAS(ArrayRef<Use *> OldUses, Value *Param) {
     llvm_unreachable("Unsupported instruction");
   };
 
-  auto ItemsToConvert = map_to_vector(OldUses, [=](Use *U) -> IP {
-    return {U, Param};
-  });
+  auto ItemsToConvert =
+      map_to_vector(OldUses, [=](Use *U) -> IP { return {U, Param}; });
   SmallVector<Instruction *> InstructionsToDelete;
 
   while (!ItemsToConvert.empty()) {

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https://github.com/llvm/llvm-project/pull/180286