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Subject: [PATCH] D17976: Add attributes for preserve_mostcc/preserve_allcc calling conventions to the C/C++ front-end
Date: March 8, 2016 at 5:17:02 PM PST
swiftix created this revision. swiftix added a reviewer: ributzka. Herald added a subscriber: aemerson. 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. http://reviews.llvm.org/D17976Files: include/clang-c/Index.h include/clang/AST/Type.h include/clang/Basic/Attr.td include/clang/Basic/Specifiers.h lib/AST/ItaniumMangle.cpp lib/AST/Type.cpp lib/AST/TypePrinter.cpp lib/Basic/Targets.cpp lib/CodeGen/CGCall.cpp lib/Sema/SemaDeclAttr.cpp lib/Sema/SemaType.cpp test/CodeGen/preserve_all.c test/CodeGen/preserve_most.c tools/libclang/CXType.cpp
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Index: tools/libclang/CXType.cpp
===================================================================
--- tools/libclang/CXType.cpp
+++ tools/libclang/CXType.cpp
@@ -534,6 +534,8 @@
TCALLINGCONV(AAPCS_VFP);
TCALLINGCONV(IntelOclBicc);
TCALLINGCONV(Swift);
+ TCALLINGCONV(PreserveMost);
+ TCALLINGCONV(PreserveAll);
case CC_SpirFunction: return CXCallingConv_Unexposed;
case CC_SpirKernel: return CXCallingConv_Unexposed;
break;
Index: test/CodeGen/preserve_most.c
===================================================================
--- test/CodeGen/preserve_most.c
+++ test/CodeGen/preserve_most.c
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm < %s | FileCheck %s
+// RUN: %clang_cc1 -triple arm64-unknown-unknown -emit-llvm < %s | FileCheck %s
+
+// Check that the preserve_most calling convention attribute at the source level
+// is lowered to the corresponding calling convention attrribute at the LLVM IR
+// level.
+void foo() __attribute__((preserve_most)) {
+ // CHECK-LABEL: define preserve_mostcc void @foo()
+}
+
Index: test/CodeGen/preserve_all.c
===================================================================
--- test/CodeGen/preserve_all.c
+++ test/CodeGen/preserve_all.c
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm < %s | FileCheck %s
+// RUN: %clang_cc1 -triple arm64-unknown-unknown -emit-llvm < %s | FileCheck %s
+
+// Check that the preserve_most calling convention attribute at the source level
+// is lowered to the corresponding calling convention attrribute at the LLVM IR
+// level.
+void foo() __attribute__((preserve_all)) {
+ // CHECK-LABEL: define preserve_allcc void @foo()
+}
+
Index: lib/Sema/SemaType.cpp
===================================================================
--- lib/Sema/SemaType.cpp
+++ lib/Sema/SemaType.cpp
@@ -112,7 +112,9 @@
case AttributeList::AT_MSABI: \
case AttributeList::AT_SysVABI: \
case AttributeList::AT_Pcs: \
- case AttributeList::AT_IntelOclBicc
+ case AttributeList::AT_IntelOclBicc: \
+ case AttributeList::AT_PreserveMost: \
+ case AttributeList::AT_PreserveAll
// Function type attributes.
#define FUNCTION_TYPE_ATTRS_CASELIST \
@@ -4639,6 +4641,10 @@
return AttributeList::AT_MSABI;
case AttributedType::attr_sysv_abi:
return AttributeList::AT_SysVABI;
+ case AttributedType::attr_preserve_most:
+ return AttributeList::AT_PreserveMost;
+ case AttributedType::attr_preserve_all:
+ return AttributeList::AT_PreserveAll;
case AttributedType::attr_ptr32:
return AttributeList::AT_Ptr32;
case AttributedType::attr_ptr64:
@@ -5974,6 +5980,10 @@
return AttributedType::attr_ms_abi;
case AttributeList::AT_SysVABI:
return AttributedType::attr_sysv_abi;
+ case AttributeList::AT_PreserveMost:
+ return AttributedType::attr_preserve_most;
+ case AttributeList::AT_PreserveAll:
+ return AttributedType::attr_preserve_all;
}
llvm_unreachable("unexpected attribute kind!");
}
Index: lib/Sema/SemaDeclAttr.cpp
===================================================================
--- lib/Sema/SemaDeclAttr.cpp
+++ lib/Sema/SemaDeclAttr.cpp
@@ -3777,7 +3777,14 @@
IntelOclBiccAttr(Attr.getRange(), S.Context,
Attr.getAttributeSpellingListIndex()));
return;
-
+ case AttributeList::AT_PreserveMost:
+ D->addAttr(::new (S.Context) PreserveMostAttr(
+ Attr.getRange(), S.Context, Attr.getAttributeSpellingListIndex()));
+ return;
+ case AttributeList::AT_PreserveAll:
+ D->addAttr(::new (S.Context) PreserveAllAttr(
+ Attr.getRange(), S.Context, Attr.getAttributeSpellingListIndex()));
+ return;
default:
llvm_unreachable("unexpected attribute kind");
}
@@ -3835,6 +3842,12 @@
return true;
}
case AttributeList::AT_IntelOclBicc: CC = CC_IntelOclBicc; break;
+ case AttributeList::AT_PreserveMost:
+ CC = CC_PreserveMost;
+ break;
+ case AttributeList::AT_PreserveAll:
+ CC = CC_PreserveAll;
+ break;
default: llvm_unreachable("unexpected attribute kind");
}
@@ -5597,6 +5610,8 @@
case AttributeList::AT_SysVABI:
case AttributeList::AT_Pcs:
case AttributeList::AT_IntelOclBicc:
+ case AttributeList::AT_PreserveMost:
+ case AttributeList::AT_PreserveAll:
handleCallConvAttr(S, D, Attr);
break;
case AttributeList::AT_OpenCLKernel:
Index: lib/CodeGen/CGCall.cpp
===================================================================
--- lib/CodeGen/CGCall.cpp
+++ lib/CodeGen/CGCall.cpp
@@ -57,6 +57,10 @@
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;
}
}
@@ -174,6 +178,12 @@
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;
}
Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -4095,6 +4095,8 @@
case CC_X86VectorCall:
case CC_IntelOclBicc:
case CC_X86_64Win64:
+ case CC_PreserveMost:
+ case CC_PreserveAll:
return CCCR_OK;
default:
return CCCR_Warning;
@@ -5545,6 +5547,8 @@
switch (CC) {
case CC_C:
case CC_Swift:
+ case CC_PreserveMost:
+ case CC_PreserveAll:
return CCCR_OK;
default:
return CCCR_Warning;
Index: lib/AST/TypePrinter.cpp
===================================================================
--- lib/AST/TypePrinter.cpp
+++ lib/AST/TypePrinter.cpp
@@ -726,6 +726,13 @@
break;
case CC_Swift:
OS << " __attribute__((swiftcall))";
+ break;
+ case CC_PreserveMost:
+ OS << " __attribute__((preserve_most))";
+ break;
+ case CC_PreserveAll:
+ OS << " __attribute__((preserve_all))";
+ break;
}
}
@@ -1345,6 +1352,12 @@
break;
}
case AttributedType::attr_inteloclbicc: OS << "inteloclbicc"; break;
+ case AttributedType::attr_preserve_most:
+ OS << "preserve_most";
+ break;
+ case AttributedType::attr_preserve_all:
+ OS << "preserve_all";
+ break;
}
OS << "))";
}
Index: lib/AST/Type.cpp
===================================================================
--- lib/AST/Type.cpp
+++ lib/AST/Type.cpp
@@ -2656,6 +2656,8 @@
case CC_SpirFunction: return "spir_function";
case CC_SpirKernel: return "spir_kernel";
case CC_Swift: return "swiftcall";
+ case CC_PreserveMost: return "preserve_most";
+ case CC_PreserveAll: return "preserve_all";
}
llvm_unreachable("Invalid calling convention.");
@@ -2999,6 +3001,8 @@
case AttributedType::attr_swiftcall:
case AttributedType::attr_vectorcall:
case AttributedType::attr_inteloclbicc:
+ case AttributedType::attr_preserve_most:
+ case AttributedType::attr_preserve_all:
case AttributedType::attr_ms_abi:
case AttributedType::attr_sysv_abi:
case AttributedType::attr_ptr32:
@@ -3056,6 +3060,8 @@
case attr_ms_abi:
case attr_sysv_abi:
case attr_inteloclbicc:
+ case attr_preserve_most:
+ case attr_preserve_all:
return true;
}
llvm_unreachable("invalid attr kind");
Index: lib/AST/ItaniumMangle.cpp
===================================================================
--- lib/AST/ItaniumMangle.cpp
+++ lib/AST/ItaniumMangle.cpp
@@ -2165,6 +2165,8 @@
case CC_IntelOclBicc:
case CC_SpirFunction:
case CC_SpirKernel:
+ case CC_PreserveMost:
+ case CC_PreserveAll:
// FIXME: we should be mangling all of the above.
return "";
Index: include/clang-c/Index.h
===================================================================
--- include/clang-c/Index.h
+++ include/clang-c/Index.h
@@ -2971,6 +2971,8 @@
CXCallingConv_X86_64SysV = 11,
CXCallingConv_X86VectorCall = 12,
CXCallingConv_Swift = 13,
+ CXCallingConv_PreserveMost = 14,
+ CXCallingConv_PreserveAll = 15,
CXCallingConv_Invalid = 100,
CXCallingConv_Unexposed = 200
Index: include/clang/Basic/Specifiers.h
===================================================================
--- include/clang/Basic/Specifiers.h
+++ include/clang/Basic/Specifiers.h
@@ -239,7 +239,9 @@
CC_IntelOclBicc, // __attribute__((intel_ocl_bicc))
CC_SpirFunction, // default for OpenCL functions on SPIR target
CC_SpirKernel, // inferred for OpenCL kernels on SPIR target
- CC_Swift // __attribute__((swiftcall))
+ CC_Swift, // __attribute__((swiftcall))
+ CC_PreserveMost, // __attribute__((preserve_most))
+ CC_PreserveAll, // __attribute__((preserve_all))
};
/// \brief Checks whether the given calling convention supports variadic
Index: include/clang/Basic/Attr.td
===================================================================
--- include/clang/Basic/Attr.td
+++ include/clang/Basic/Attr.td
@@ -1391,6 +1391,16 @@
let Documentation = [Undocumented];
}
+def PreserveMost : InheritableAttr {
+ let Spellings = [GNU<"preserve_most">];
+ let Documentation = [Undocumented];
+}
+
+def PreserveAll : InheritableAttr {
+ let Spellings = [GNU<"preserve_all">];
+ let Documentation = [Undocumented];
+}
+
def Target : InheritableAttr {
let Spellings = [GCC<"target">];
let Args = [StringArgument<"featuresStr">];
Index: include/clang/AST/Type.h
===================================================================
--- include/clang/AST/Type.h
+++ include/clang/AST/Type.h
@@ -3740,6 +3740,8 @@
attr_inteloclbicc,
attr_ms_abi,
attr_sysv_abi,
+ attr_preserve_most,
+ attr_preserve_all,
attr_ptr32,
attr_ptr64,
attr_sptr,
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