Add stuff for o32 ABI conformance.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132443 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 60 insertions, 1 deletions

diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index cfd9860195..043ead7e62 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -2858,10 +2858,21 @@ void MSP430TargetCodeGenInfo::SetTargetAttributes(const Decl *D,
 //===----------------------------------------------------------------------===//
 
 namespace {
+class MipsABIInfo : public ABIInfo {
+public:
+  MipsABIInfo(CodeGenTypes &CGT) : ABIInfo(CGT) {}
+
+  ABIArgInfo classifyReturnType(QualType RetTy) const;
+  ABIArgInfo classifyArgumentType(QualType RetTy) const;
+  virtual void computeInfo(CGFunctionInfo &FI) const;
+  virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
+                                 CodeGenFunction &CGF) const;
+};
+
 class MIPSTargetCodeGenInfo : public TargetCodeGenInfo {
 public:
   MIPSTargetCodeGenInfo(CodeGenTypes &CGT)
-    : TargetCodeGenInfo(new DefaultABIInfo(CGT)) {}
+    : TargetCodeGenInfo(new MipsABIInfo(CGT)) {}
 
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &CGM) const {
     return 29;
@@ -2872,6 +2883,54 @@ public:
 };
 }
 
+ABIArgInfo MipsABIInfo::classifyArgumentType(QualType Ty) const {
+  if (isAggregateTypeForABI(Ty)) {
+    // Ignore empty aggregates.
+    if (getContext().getTypeSize(Ty) == 0)
+      return ABIArgInfo::getIgnore();
+
+    return ABIArgInfo::getIndirect(0);
+  }
+
+  // Treat an enum type as its underlying type.
+  if (const EnumType *EnumTy = Ty->getAs<EnumType>())
+    Ty = EnumTy->getDecl()->getIntegerType();
+
+  return (Ty->isPromotableIntegerType() ?
+          ABIArgInfo::getExtend() : ABIArgInfo::getDirect());
+}
+
+ABIArgInfo MipsABIInfo::classifyReturnType(QualType RetTy) const {
+  if (RetTy->isVoidType())
+    return ABIArgInfo::getIgnore();
+
+  if (isAggregateTypeForABI(RetTy)) {
+    if (RetTy->isAnyComplexType())
+      return ABIArgInfo::getDirect();
+
+    return ABIArgInfo::getIndirect(0);
+  }
+
+  // Treat an enum type as its underlying type.
+  if (const EnumType *EnumTy = RetTy->getAs<EnumType>())
+    RetTy = EnumTy->getDecl()->getIntegerType();
+
+  return (RetTy->isPromotableIntegerType() ?
+          ABIArgInfo::getExtend() : ABIArgInfo::getDirect());
+}
+
+void MipsABIInfo::computeInfo(CGFunctionInfo &FI) const {
+  FI.getReturnInfo() = classifyReturnType(FI.getReturnType());
+  for (CGFunctionInfo::arg_iterator it = FI.arg_begin(), ie = FI.arg_end();
+       it != ie; ++it)
+    it->info = classifyArgumentType(it->type);
+}
+
+llvm::Value* MipsABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
+                                    CodeGenFunction &CGF) const {
+  return 0;
+}
+
 bool
 MIPSTargetCodeGenInfo::initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
                                                llvm::Value *Address) const {