Add a divided flag for the first piece of an argument divided into mulitple parts. Fixes PR1643

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49611 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index deded1a36a..07e593afb7 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -1734,6 +1734,8 @@ namespace ISD {
     static const uint64_t NestOffs       = 5;
     static const uint64_t ByValAlign     = 0xFULL << 6; //< Struct alignment
     static const uint64_t ByValAlignOffs = 6;
+    static const uint64_t Divided        = 1ULL << 10;
+    static const uint64_t DividedOffs    = 10;
     static const uint64_t OrigAlign      = 0x1FULL<<27;
     static const uint64_t OrigAlignOffs  = 27;
     static const uint64_t ByValSize      = 0xffffffffULL << 32; //< Struct size
@@ -1770,6 +1772,9 @@ namespace ISD {
       Flags = (Flags & ~ByValAlign) |
         (uint64_t(Log2_32(A) + 1) << ByValAlignOffs);
     }
+            
+    bool isDivided()   const { return Flags & Divided; }
+    void setDivided()  { Flags |= One << DividedOffs; }
 
     unsigned getOrigAlign() const {
       return (One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2;