Pass sret arguments through the stack instead of through registers in Sparc backend. It makes the code generated more compliant with the sparc32 ABI.

llvm-svn: 124030

1 files changed, 9 insertions, 2 deletions

diff --git a/llvm/lib/Target/Sparc/SparcMachineFunctionInfo.h b/llvm/lib/Target/Sparc/SparcMachineFunctionInfo.h
index e34c1312810..0b74308eb0e 100644
--- a/llvm/lib/Target/Sparc/SparcMachineFunctionInfo.h
+++ b/llvm/lib/Target/Sparc/SparcMachineFunctionInfo.h
@@ -24,16 +24,23 @@ namespace llvm {
     /// VarArgsFrameOffset - Frame offset to start of varargs area.
     int VarArgsFrameOffset;
 
+    /// SRetReturnReg - Holds the virtual register into which the sret
+    /// argument is passed.
+    unsigned SRetReturnReg;
   public:
-    SparcMachineFunctionInfo() : GlobalBaseReg(0), VarArgsFrameOffset(0) {}
+    SparcMachineFunctionInfo()
+      : GlobalBaseReg(0), VarArgsFrameOffset(0), SRetReturnReg(0) {}
     explicit SparcMachineFunctionInfo(MachineFunction &MF)
-      : GlobalBaseReg(0), VarArgsFrameOffset(0) {}
+      : GlobalBaseReg(0), VarArgsFrameOffset(0), SRetReturnReg(0) {}
 
     unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
     void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
 
     int getVarArgsFrameOffset() const { return VarArgsFrameOffset; }
     void setVarArgsFrameOffset(int Offset) { VarArgsFrameOffset = Offset; }
+
+    unsigned getSRetReturnReg() const { return SRetReturnReg; }
+    void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
   };
 }