Vendor import of clang trunk r132879:

http://llvm.org/svn/llvm-project/cfe/trunk@132879

1 files changed, 81 insertions, 9 deletions

diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index bc2472c..043ead7 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -648,7 +648,7 @@ ABIArgInfo X86_32ABIInfo::getIndirectResult(QualType Ty, bool ByVal) const {
   unsigned TypeAlign = getContext().getTypeAlign(Ty) / 8;
   unsigned StackAlign = getTypeStackAlignInBytes(Ty, TypeAlign);
   if (StackAlign == 0)
-    return ABIArgInfo::getIndirect(0);
+    return ABIArgInfo::getIndirect(4);
 
   // If the stack alignment is less than the type alignment, realign the
   // argument.
@@ -1315,13 +1315,10 @@ ABIArgInfo X86_64ABIInfo::getIndirectResult(QualType Ty) const {
   if (isRecordWithNonTrivialDestructorOrCopyConstructor(Ty))
     return ABIArgInfo::getIndirect(0, /*ByVal=*/false);
 
-  // Compute the byval alignment. We trust the back-end to honor the
-  // minimum ABI alignment for byval, to make cleaner IR.
-  const unsigned MinABIAlign = 8;
-  unsigned Align = getContext().getTypeAlign(Ty) / 8;
-  if (Align > MinABIAlign)
-    return ABIArgInfo::getIndirect(Align);
-  return ABIArgInfo::getIndirect(0);
+  // Compute the byval alignment. We specify the alignment of the byval in all
+  // cases so that the mid-level optimizer knows the alignment of the byval.
+  unsigned Align = std::max(getContext().getTypeAlign(Ty) / 8, 8U);
+  return ABIArgInfo::getIndirect(Align);
 }
 
 /// Get16ByteVectorType - The ABI specifies that a value should be passed in an
@@ -2279,6 +2276,22 @@ public:
   int getDwarfEHStackPointer(CodeGen::CodeGenModule &M) const {
     return 13;
   }
+
+  bool initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
+                               llvm::Value *Address) const {
+    CodeGen::CGBuilderTy &Builder = CGF.Builder;
+    llvm::LLVMContext &Context = CGF.getLLVMContext();
+
+    const llvm::IntegerType *i8 = llvm::Type::getInt8Ty(Context);
+    llvm::Value *Four8 = llvm::ConstantInt::get(i8, 4);
+
+    // 0-15 are the 16 integer registers.
+    AssignToArrayRange(Builder, Address, Four8, 0, 15);
+
+    return false;
+  }
+
+
 };
 
 }
@@ -2845,10 +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;
@@ -2859,6 +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 {