[Alignment][NFC] TargetCallingConv::setByValAlign

[gchatelet]

Summary

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

llvm/include/llvm/CodeGen/TargetCallingConv.h

public:
 
     bool isPointer()  const { return IsPointer; }
     void setPointer() { IsPointer = 1; }
 
     unsigned getByValAlign() const {
       MaybeAlign A = decodeMaybeAlign(ByValAlign);
       return A ? A->value() : 0;
     }
-    void setByValAlign(unsigned A) {
-      ByValAlign = encode(Align(A));
-      assert(getByValAlign() == A && "bitfield overflow");
+    void setByValAlign(Align A) {
+      ByValAlign = encode(A);
+      assert(getByValAlign() == A.value() && "bitfield overflow");
     }
 
     unsigned getOrigAlign() const {
       MaybeAlign A = decodeMaybeAlign(OrigAlign);
       return A ? A->value() : 0;
     }
     void setOrigAlign(Align A) {
       OrigAlign = encode(A);

llvm/lib/CodeGen/GlobalISel/CallLowering.cpp

if (Flags.isByVal() || Flags.isInAlloca()) {
 
     // For ByVal, alignment should be passed from FE.  BE will guess if
     // this info is not there but there are cases it cannot get right.
     unsigned FrameAlign;
     if (FuncInfo.getParamAlignment(OpIdx - 2))
       FrameAlign = FuncInfo.getParamAlignment(OpIdx - 2);
     else
       FrameAlign = getTLI()->getByValTypeAlignment(ElementTy, DL);
-    Flags.setByValAlign(FrameAlign);
+    Flags.setByValAlign(Align(FrameAlign));
   }
   if (Attrs.hasAttribute(OpIdx, Attribute::Nest))
     Flags.setNest();
   Flags.setOrigAlign(Align(DL.getABITypeAlignment(Arg.Ty)));
 }
 
 template void
 CallLowering::setArgFlags<Function>(CallLowering::ArgInfo &Arg, unsigned OpIdx,

llvm/lib/CodeGen/SelectionDAG/FastISel.cpp

if (Arg.IsByVal || Arg.IsInAlloca) {
           DL.getTypeAllocSize(Arg.ByValType ? Arg.ByValType : ElementTy);
 
       // For ByVal, alignment should come from FE. BE will guess if this info
       // is not there, but there are cases it cannot get right.
       unsigned FrameAlign = Arg.Alignment;
       if (!FrameAlign)
         FrameAlign = TLI.getByValTypeAlignment(ElementTy, DL);
       Flags.setByValSize(FrameSize);
-      Flags.setByValAlign(FrameAlign);
+      Flags.setByValAlign(Align(FrameAlign));
     }
     if (Arg.IsNest)
       Flags.setNest();
     if (NeedsRegBlock)
       Flags.setInConsecutiveRegs();
     Flags.setOrigAlign(Align(DL.getABITypeAlignment(Arg.Ty)));
 
     CLI.OutVals.push_back(Arg.Val);

llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

for (unsigned Value = 0, NumValues = ValueVTs.size(); Value != NumValues;
         Flags.setByValSize(FrameSize);
 
         // info is not there but there are cases it cannot get right.
         unsigned FrameAlign;
         if (Args[i].Alignment)
           FrameAlign = Args[i].Alignment;
         else
           FrameAlign = getByValTypeAlignment(ElementTy, DL);
-        Flags.setByValAlign(FrameAlign);
+        Flags.setByValAlign(Align(FrameAlign));
       }
       if (Args[i].IsNest)
         Flags.setNest();
       if (NeedsRegBlock)
         Flags.setInConsecutiveRegs();
       Flags.setOrigAlign(OriginalAlignment);
 
       MVT PartVT = getRegisterTypeForCallingConv(CLI.RetTy->getContext(),
for (unsigned Value = 0, NumValues = ValueVTs.size();
         unsigned FrameSize = DL.getTypeAllocSize(Arg.getParamByValType());
         Flags.setByValSize(FrameSize);
 
         unsigned FrameAlign;
         if (Arg.getParamAlignment())
           FrameAlign = Arg.getParamAlignment();
         else
           FrameAlign = TLI->getByValTypeAlignment(ElementTy, DL);
-        Flags.setByValAlign(FrameAlign);
+        Flags.setByValAlign(Align(FrameAlign));
       }
       if (Arg.hasAttribute(Attribute::Nest))
         Flags.setNest();
       if (NeedsRegBlock)
         Flags.setInConsecutiveRegs();
       Flags.setOrigAlign(OriginalAlignment);
       if (ArgCopyElisionCandidates.count(&Arg))
         Flags.setCopyElisionCandidate();