[llvm] [Pass] Add variadic function templates for `PreservedAnalyses` (PR #130749)

[via llvm-commits]

https://github.com/paperchalice updated https://github.com/llvm/llvm-project/pull/130749

>From d61a7d161c90aff23cf0db2e6d4e77172ec2113e Mon Sep 17 00:00:00 2001
From: PaperChalice <liujunchang97 at outlook.com>
Date: Tue, 11 Mar 2025 18:48:45 +0800
Subject: [PATCH] [Pass] Add variadic function templates for
 `PreservedAnalyses`

So it is possible to use `PA.preserve<Analysis1, Analysis2>();`
---
 llvm/include/llvm/IR/Analysis.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/llvm/include/llvm/IR/Analysis.h b/llvm/include/llvm/IR/Analysis.h
index dd43f5ee5f706..ff4dc7fb6f6c4 100644
--- a/llvm/include/llvm/IR/Analysis.h
+++ b/llvm/include/llvm/IR/Analysis.h
@@ -133,6 +133,11 @@ class PreservedAnalyses {
     return *this;
   }
 
+  /// Mark multiple analyses as preserved.
+  template <typename... AnalysisTs> PreservedAnalyses &preserve() {
+    return preserve(AnalysisTs::ID()...);
+  }
+
   /// Given an analysis's ID, mark the analysis as preserved, adding it
   /// to the set.
   PreservedAnalyses &preserve(AnalysisKey *ID) {
@@ -146,12 +151,23 @@ class PreservedAnalyses {
     return *this;
   }
 
+  /// Mark analyses as preserved using IDs.
+  template <typename... AnalysisKeyPtrs>
+  PreservedAnalyses &preserve(AnalysisKeyPtrs... IDs) {
+    return (preserve(IDs), ..., *this);
+  }
+
   /// Mark an analysis set as preserved.
   template <typename AnalysisSetT> PreservedAnalyses &preserveSet() {
     preserveSet(AnalysisSetT::ID());
     return *this;
   }
 
+  /// Mark analysis sets as preserved.
+  template <typename... AnalysisSetTs> PreservedAnalyses &preserveSet() {
+    return preserveSet(AnalysisSetTs::ID()...);
+  }
+
   /// Mark an analysis set as preserved using its ID.
   PreservedAnalyses &preserveSet(AnalysisSetKey *ID) {
     // If we're not already in the saturated 'all' state, add this set.
@@ -160,6 +176,12 @@ class PreservedAnalyses {
     return *this;
   }
 
+  /// Mark analysis sets as preserved using IDs.
+  template <typename... AnalysisSetKeyPtrs>
+  PreservedAnalyses &preserveSet(AnalysisSetKeyPtrs... IDs) {
+    return (preserveSet(IDs), ..., *this);
+  }
+
   /// Mark an analysis as abandoned.
   ///
   /// An abandoned analysis is not preserved, even if it is nominally covered
@@ -172,6 +194,11 @@ class PreservedAnalyses {
     return *this;
   }
 
+  /// Mark analyses as abandoned.
+  template <typename... AnalysisTs> PreservedAnalyses &abandon() {
+    return abandon(AnalysisTs::ID()...);
+  }
+
   /// Mark an analysis as abandoned using its ID.
   ///
   /// An abandoned analysis is not preserved, even if it is nominally covered
@@ -185,6 +212,12 @@ class PreservedAnalyses {
     return *this;
   }
 
+  /// Mark analyses as abandoned using IDs.
+  template <typename... AnalysisKeyPtrs>
+  PreservedAnalyses &abandon(AnalysisKeyPtrs... IDs) {
+    return (abandon(IDs), ..., *this);
+  }
+
   /// Intersect this set with another in place.
   ///
   /// This is a mutating operation on this preserved set, removing all