r288394 - swiftcc: Add an api to query whether a target ABI stores swifterror in a register

[Arnold Schwaighofer via cfe-commits]

Author: arnolds
Date: Thu Dec  1 12:07:38 2016
New Revision: 288394

URL: http://llvm.org/viewvc/llvm-project?rev=288394&view=rev
Log:
swiftcc: Add an api to query whether a target ABI stores swifterror in a register

Modified:
    cfe/trunk/include/clang/CodeGen/SwiftCallingConv.h
    cfe/trunk/lib/CodeGen/ABIInfo.h
    cfe/trunk/lib/CodeGen/SwiftCallingConv.cpp
    cfe/trunk/lib/CodeGen/TargetInfo.cpp

Modified: cfe/trunk/include/clang/CodeGen/SwiftCallingConv.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/CodeGen/SwiftCallingConv.h?rev=288394&r1=288393&r2=288394&view=diff
==============================================================================
--- cfe/trunk/include/clang/CodeGen/SwiftCallingConv.h (original)
+++ cfe/trunk/include/clang/CodeGen/SwiftCallingConv.h Thu Dec  1 12:07:38 2016
@@ -160,6 +160,9 @@ ABIArgInfo classifyArgumentType(CodeGenM
 /// private interface for Clang.
 void computeABIInfo(CodeGenModule &CGM, CGFunctionInfo &FI);
 
+/// Is swifterror lowered to a register by the target ABI.
+bool isSwiftErrorLoweredInRegister(CodeGenModule &CGM);
+
 } // end namespace swiftcall
 } // end namespace CodeGen
 } // end namespace clang

Modified: cfe/trunk/lib/CodeGen/ABIInfo.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/ABIInfo.h?rev=288394&r1=288393&r2=288394&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/ABIInfo.h (original)
+++ cfe/trunk/lib/CodeGen/ABIInfo.h Thu Dec  1 12:07:38 2016
@@ -142,6 +142,8 @@ namespace swiftcall {
                                            llvm::Type *eltTy,
                                            unsigned elts) const;
 
+    virtual bool isSwiftErrorInRegister() const = 0;
+
     static bool classof(const ABIInfo *info) {
       return info->supportsSwift();
     }

Modified: cfe/trunk/lib/CodeGen/SwiftCallingConv.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/SwiftCallingConv.cpp?rev=288394&r1=288393&r2=288394&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/SwiftCallingConv.cpp (original)
+++ cfe/trunk/lib/CodeGen/SwiftCallingConv.cpp Thu Dec  1 12:07:38 2016
@@ -828,3 +828,8 @@ void swiftcall::computeABIInfo(CodeGenMo
     argInfo.info = classifyArgumentType(CGM, argInfo.type);
   }
 }
+
+// Is swifterror lowered to a register by the target ABI.
+bool swiftcall::isSwiftErrorLoweredInRegister(CodeGenModule &CGM) {
+  return getSwiftABIInfo(CGM).isSwiftErrorInRegister();
+}

Modified: cfe/trunk/lib/CodeGen/TargetInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/TargetInfo.cpp?rev=288394&r1=288393&r2=288394&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/TargetInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/TargetInfo.cpp Thu Dec  1 12:07:38 2016
@@ -958,6 +958,11 @@ public:
     // scalar registers.
     return occupiesMoreThan(CGT, scalars, /*total*/ 3);
   }  
+
+  bool isSwiftErrorInRegister() const override {
+    // x86-32 lowering does not support passing swifterror in a register.
+    return false;
+  }
 };
 
 class X86_32TargetCodeGenInfo : public TargetCodeGenInfo {
@@ -2012,6 +2017,9 @@ public:
                                     bool asReturnValue) const override {
     return occupiesMoreThan(CGT, scalars, /*total*/ 4);
   }  
+  bool isSwiftErrorInRegister() const override {
+    return true;
+  }
 };
 
 /// WinX86_64ABIInfo - The Windows X86_64 ABI information.
@@ -2043,6 +2051,10 @@ public:
     return occupiesMoreThan(CGT, scalars, /*total*/ 4);
   }
 
+  bool isSwiftErrorInRegister() const override {
+    return true;
+  }
+
 private:
   ABIArgInfo classify(QualType Ty, unsigned &FreeSSERegs,
                       bool IsReturnType) const;
@@ -4628,6 +4640,9 @@ private:
                                     bool asReturnValue) const override {
     return occupiesMoreThan(CGT, scalars, /*total*/ 4);
   }
+  bool isSwiftErrorInRegister() const override {
+    return true;
+  }
 };
 
 class AArch64TargetCodeGenInfo : public TargetCodeGenInfo {
@@ -5181,6 +5196,9 @@ private:
                                     bool asReturnValue) const override {
     return occupiesMoreThan(CGT, scalars, /*total*/ 4);
   }
+  bool isSwiftErrorInRegister() const override {
+    return true;
+  }
 };
 
 class ARMTargetCodeGenInfo : public TargetCodeGenInfo {
@@ -5949,6 +5967,9 @@ public:
                                     bool asReturnValue) const override {
     return occupiesMoreThan(CGT, scalars, /*total*/ 4);
   }
+  bool isSwiftErrorInRegister() const override {
+    return true;
+  }
 };
 
 class SystemZTargetCodeGenInfo : public TargetCodeGenInfo {