propagate struct size and alignment of byval arguments to the DAG

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40986 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 12 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/CallingConvLower.h b/include/llvm/CodeGen/CallingConvLower.h
index 959d0528c6..9c776131b5 100644
--- a/include/llvm/CodeGen/CallingConvLower.h
+++ b/include/llvm/CodeGen/CallingConvLower.h
@@ -190,6 +190,10 @@ public:
     StackOffset += Size;
     return Result;
   }
+
+  void HandleStruct(unsigned ValNo, MVT::ValueType ValVT,
+                    MVT::ValueType LocVT, CCValAssign::LocInfo LocInfo,
+                    unsigned ArgFlags);
 private:
   /// MarkAllocated - Mark a register and all of its aliases as allocated.
   void MarkAllocated(unsigned Reg);
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 3502e89501..b0278cbc5b 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -68,6 +68,10 @@ namespace ISD {
     ByValOffs         = 4,
     Nest              = 1<<5,  ///< Parameter is nested function static chain
     NestOffs          = 5,
+    ByValAlign        = 0xF << 6, //< The alignment of the struct
+    ByValAlignOffs    = 6,
+    ByValSize         = 0x1ffff << 10, //< The size of the struct
+    ByValSizeOffs     = 10,
     OrigAlignment     = 0x1F<<27,
     OrigAlignmentOffs = 27
   };
@@ -200,6 +204,10 @@ namespace ISD {
     /// Bit 0 - signness
     /// Bit 1 - 'inreg' attribute
     /// Bit 2 - 'sret' attribute
+    /// Bit 4 - 'byval' attribute
+    /// Bit 5 - 'nest' attribute
+    /// Bit 6-9 - alignment of byval structures
+    /// Bit 10-26 - size of byval structures
     /// Bits 31:27 - argument ABI alignment in the first argument piece and
     /// alignment '1' in other argument pieces.
     CALL,