Add attributes for preserve_mostcc/preserve_allcc calling conventions to the C/C++ front-end
Till now, preserve_mostcc/preserve_allcc calling convention attributes were only
available at the LLVM IR level. This patch adds attributes for
preserve_mostcc/preserve_allcc calling conventions to the C/C++ front-end.
The code was mostly written by Juergen Ributzka.
I just added support for the AArch64 target and tests.
Differential Revision: http://reviews.llvm.org/D18025
llvm-svn: 263647
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 7fb301c..5e10f26 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -57,6 +57,8 @@
case CC_X86VectorCall: return llvm::CallingConv::X86_VectorCall;
case CC_SpirFunction: return llvm::CallingConv::SPIR_FUNC;
case CC_SpirKernel: return llvm::CallingConv::SPIR_KERNEL;
+ case CC_PreserveMost: return llvm::CallingConv::PreserveMost;
+ case CC_PreserveAll: return llvm::CallingConv::PreserveAll;
}
}
@@ -187,6 +189,12 @@
if (D->hasAttr<SysVABIAttr>())
return IsWindows ? CC_X86_64SysV : CC_C;
+ if (D->hasAttr<PreserveMostAttr>())
+ return CC_PreserveMost;
+
+ if (D->hasAttr<PreserveAllAttr>())
+ return CC_PreserveAll;
+
return CC_C;
}