XCore target: Add target specific EmitVAArg
This is so aggregates can be passed as var args too.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188664 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index bab77e6..4b1c565 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -5370,13 +5370,53 @@
// Xcore ABI Implementation
//===----------------------------------------------------------------------===//
namespace {
+class XCoreABIInfo : public DefaultABIInfo {
+public:
+ XCoreABIInfo(CodeGen::CodeGenTypes &CGT) : DefaultABIInfo(CGT) {}
+ virtual llvm::Value *EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
+ CodeGenFunction &CGF) const;
+};
+
class XcoreTargetCodeGenInfo : public TargetCodeGenInfo {
public:
XcoreTargetCodeGenInfo(CodeGenTypes &CGT)
- :TargetCodeGenInfo(new DefaultABIInfo(CGT)) {}
+ :TargetCodeGenInfo(new XCoreABIInfo(CGT)) {}
};
} // end anonymous namespace
+llvm::Value *XCoreABIInfo::EmitVAArg(llvm::Value *VAListAddr, QualType Ty,
+ CodeGenFunction &CGF) const {
+ ABIArgInfo AI = classifyArgumentType(Ty);
+ CGBuilderTy &Builder = CGF.Builder;
+ llvm::Type *ArgTy = CGT.ConvertType(Ty);
+ if (AI.canHaveCoerceToType() && !AI.getCoerceToType())
+ AI.setCoerceToType(ArgTy);
+
+ // handle the VAList
+ llvm::Value *VAListAddrAsBPP = Builder.CreateBitCast(VAListAddr,
+ CGF.Int8PtrPtrTy);
+ llvm::Value *AP = Builder.CreateLoad(VAListAddrAsBPP);
+ llvm::Value *APN = Builder.CreateConstGEP1_32(AP, 4);
+ Builder.CreateStore(APN, VAListAddrAsBPP);
+
+ // handle the argument
+ llvm::Type *ArgPtrTy = llvm::PointerType::getUnqual(ArgTy);
+ switch (AI.getKind()) {
+ default:
+ case ABIArgInfo::Expand:
+ llvm_unreachable("Unsupported ABI kind for va_arg");
+ case ABIArgInfo::Ignore:
+ return llvm::UndefValue::get(ArgPtrTy);
+ case ABIArgInfo::Extend:
+ case ABIArgInfo::Direct:
+ return Builder.CreatePointerCast(AP, ArgPtrTy);
+ case ABIArgInfo::Indirect:
+ llvm::Value *ArgAddr;
+ ArgAddr = Builder.CreateBitCast(AP, llvm::PointerType::getUnqual(ArgPtrTy));
+ ArgAddr = Builder.CreateLoad(ArgAddr);
+ return Builder.CreatePointerCast(ArgAddr, ArgPtrTy);
+ }
+}
//===----------------------------------------------------------------------===//
// Driver code