[llvm-branch-commits] [llvm] [CodeGen][NPM] VirtRegRewriter: Set VirtReg flag (PR #138660)

[Akshat Oke via llvm-branch-commits]

https://github.com/optimisan updated 
https://github.com/llvm/llvm-project/pull/138660

>From 838e904009527297d38e79572745a810cfa34d60 Mon Sep 17 00:00:00 2001
From: Akshat Oke <akshat....@amd.com>
Date: Tue, 6 May 2025 09:05:52 +0000
Subject: [PATCH] [CodeGen][NPM] VirtRegRewriter: Set VirtReg flag

---
 llvm/include/llvm/CodeGen/VirtRegMap.h | 8 ++++++++
 llvm/lib/CodeGen/VirtRegMap.cpp        | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/llvm/include/llvm/CodeGen/VirtRegMap.h 
b/llvm/include/llvm/CodeGen/VirtRegMap.h
index f5fba0d65401e..37d382650ac1f 100644
--- a/llvm/include/llvm/CodeGen/VirtRegMap.h
+++ b/llvm/include/llvm/CodeGen/VirtRegMap.h
@@ -248,6 +248,14 @@ class VirtRegRewriterPass : public 
PassInfoMixin<VirtRegRewriterPass> {
   static bool isRequired() { return true; }
 
   void printPipeline(raw_ostream &OS, function_ref<StringRef(StringRef)>) 
const;
+
+  MachineFunctionProperties getSetProperties() const {
+    if (ClearVirtRegs) {
+      return MachineFunctionProperties().set(
+          MachineFunctionProperties::Property::NoVRegs);
+    }
+    return {};
+  }
 };
 
 } // end llvm namespace
diff --git a/llvm/lib/CodeGen/VirtRegMap.cpp b/llvm/lib/CodeGen/VirtRegMap.cpp
index 49e819e2d10f7..839905d5e3860 100644
--- a/llvm/lib/CodeGen/VirtRegMap.cpp
+++ b/llvm/lib/CodeGen/VirtRegMap.cpp
@@ -302,6 +302,8 @@ bool 
VirtRegRewriterLegacy::runOnMachineFunction(MachineFunction &MF) {
 PreservedAnalyses
 VirtRegRewriterPass::run(MachineFunction &MF,
                          MachineFunctionAnalysisManager &MFAM) {
+  MFPropsModifier _(*this, MF);
+
   VirtRegMap &VRM = MFAM.getResult<VirtRegMapAnalysis>(MF);
   LiveIntervals &LIS = MFAM.getResult<LiveIntervalsAnalysis>(MF);
   LiveRegMatrix &LRM = MFAM.getResult<LiveRegMatrixAnalysis>(MF);

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