[PATCH] D67922: [Alignment][NFC] MaybeAlign in GVNExpression

[Guillaume Chatelet via Phabricator via llvm-commits]

gchatelet created this revision.
gchatelet added a reviewer: courbet.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D67922

Files:
  llvm/include/llvm/Transforms/Scalar/GVNExpression.h
  llvm/lib/Transforms/Scalar/NewGVN.cpp


Index: llvm/lib/Transforms/Scalar/NewGVN.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/NewGVN.cpp
+++ llvm/lib/Transforms/Scalar/NewGVN.cpp
@@ -1332,7 +1332,7 @@
   E->setOpcode(0);
   E->op_push_back(PointerOp);
   if (LI)
-    E->setAlignment(LI->getAlignment());
+    E->setAlignment(llvm::MaybeAlign(LI->getAlignment()));
 
   // TODO: Value number heap versions. We may be able to discover
   // things alias analysis can't on it's own (IE that a store and a
Index: llvm/include/llvm/Transforms/Scalar/GVNExpression.h
===================================================================
--- llvm/include/llvm/Transforms/Scalar/GVNExpression.h
+++ llvm/include/llvm/Transforms/Scalar/GVNExpression.h
@@ -323,7 +323,7 @@
 class LoadExpression final : public MemoryExpression {
 private:
   LoadInst *Load;
-  unsigned Alignment;
+  llvm::MaybeAlign Alignment;
 
 public:
   LoadExpression(unsigned NumOperands, LoadInst *L,
@@ -333,7 +333,7 @@
   LoadExpression(enum ExpressionType EType, unsigned NumOperands, LoadInst *L,
                  const MemoryAccess *MemoryLeader)
       : MemoryExpression(NumOperands, EType, MemoryLeader), Load(L) {
-    Alignment = L ? L->getAlignment() : 0;
+    Alignment.emplace(L ? L->getAlignment() : 0);
   }
 
   LoadExpression() = delete;
@@ -348,8 +348,8 @@
   LoadInst *getLoadInst() const { return Load; }
   void setLoadInst(LoadInst *L) { Load = L; }
 
-  unsigned getAlignment() const { return Alignment; }
-  void setAlignment(unsigned Align) { Alignment = Align; }
+  llvm::MaybeAlign getAlignment() const { return Alignment; }
+  void setAlignment(llvm::MaybeAlign Align) { Alignment = Align; }
 
   bool equals(const Expression &Other) const override;
   bool exactlyEquals(const Expression &Other) const override {


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