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Date: Fri, 31 Jul 2015 10:21:57 +0000
From: Wang Nan <wangnan0@...wei.com>
To: <ast@...mgrid.com>
CC: <hekuang@...wei.com>, <pi3orama@....com>,
<linux-kernel@...r.kernel.org>
Subject: [LLVM CLANG PATCH] BPF: add __builtin_bpf_typeid()
This patch introduces a new builtin function __builtin_bpf_typeid()
for BPF. This function emit a 'llvm.eh_typeid_for', and will be
converted to typeid of a global variable.
Signed-off-by: Wang Nan <wangnan0@...wei.com>
---
include/clang/Basic/BuiltinsBPF.def | 16 ++++++++++++++++
include/clang/Basic/TargetBuiltins.h | 9 +++++++++
lib/Basic/Targets.cpp | 14 +++++++++++++-
lib/CodeGen/CGBuiltin.cpp | 16 ++++++++++++++++
lib/CodeGen/CodeGenFunction.h | 1 +
5 files changed, 55 insertions(+), 1 deletion(-)
create mode 100644 include/clang/Basic/BuiltinsBPF.def
diff --git a/include/clang/Basic/BuiltinsBPF.def b/include/clang/Basic/BuiltinsBPF.def
new file mode 100644
index 0000000..9e53ee0
--- /dev/null
+++ b/include/clang/Basic/BuiltinsBPF.def
@@ -0,0 +1,16 @@
+//===--- BuiltinsBPF.def - BPF Builtin function database ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the BPF-specific builtin function database. Users of
+// this file must define the BUILTIN macro to make use of this information.
+//
+//===----------------------------------------------------------------------===//
+
+BUILTIN(__builtin_bpf_typeid, "Wiv*", "nc")
+
diff --git a/include/clang/Basic/TargetBuiltins.h b/include/clang/Basic/TargetBuiltins.h
index b4740c5..550f921 100644
--- a/include/clang/Basic/TargetBuiltins.h
+++ b/include/clang/Basic/TargetBuiltins.h
@@ -93,6 +93,15 @@ namespace clang {
};
}
+ namespace BPF {
+ enum {
+ LastTIBuiltin = clang::Builtin::FirstTSBuiltin-1,
+#define BUILTIN(ID, TYPE, ATTRS) BI##ID,
+#include "clang/Basic/BuiltinsBPF.def"
+ LastTSBuiltin
+ };
+ }
+
/// \brief Flags to identify the types for overloaded Neon builtins.
///
/// These must be kept in sync with the flags in utils/TableGen/NeonEmitter.h.
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index f229c99..aa7fffb 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -6111,6 +6111,7 @@ validateAsmConstraint(const char *&Name,
};
class BPFTargetInfo : public TargetInfo {
+ static const Builtin::Info BuiltinInfo[];
public:
BPFTargetInfo(const llvm::Triple &Triple) : TargetInfo(Triple) {
LongWidth = LongAlign = PointerWidth = PointerAlign = 64;
@@ -6141,7 +6142,10 @@ public:
}
void getTargetBuiltins(const Builtin::Info *&Records,
- unsigned &NumRecords) const override {}
+ unsigned &NumRecords) const override {
+ Records = BuiltinInfo;
+ NumRecords = clang::BPF::LastTSBuiltin - Builtin::FirstTSBuiltin;
+ }
const char *getClobbers() const override {
return "";
}
@@ -6164,6 +6168,14 @@ public:
}
};
+const Builtin::Info BPFTargetInfo::BuiltinInfo[] = {
+#define BUILTIN(ID, TYPE, ATTRS) { #ID, TYPE, ATTRS, 0, ALL_LANGUAGES },
+#define LIBBUILTIN(ID, TYPE, ATTRS, HEADER) { #ID, TYPE, ATTRS, HEADER,\
+ ALL_LANGUAGES },
+#include "clang/Basic/BuiltinsBPF.def"
+};
+
+
class MipsTargetInfoBase : public TargetInfo {
virtual void setDescriptionString() = 0;
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 1555d29..a46f638 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1882,6 +1882,9 @@ Value *CodeGenFunction::EmitTargetBuiltinExpr(unsigned BuiltinID,
case llvm::Triple::nvptx:
case llvm::Triple::nvptx64:
return EmitNVPTXBuiltinExpr(BuiltinID, E);
+ case llvm::Triple::bpfel:
+ case llvm::Triple::bpfeb:
+ return EmitBPFBuiltinExpr(BuiltinID, E);
default:
return nullptr;
}
@@ -7056,3 +7059,16 @@ Value *CodeGenFunction::EmitNVPTXBuiltinExpr(unsigned BuiltinID,
return nullptr;
}
}
+
+Value *CodeGenFunction::EmitBPFBuiltinExpr(unsigned BuiltinID,
+ const CallExpr *E) {
+ switch (BuiltinID) {
+ default:
+ return nullptr;
+ case BPF::BI__builtin_bpf_typeid:
+ assert(E->getArg(0)->getType()->isPointerType());
+ llvm::Value *llvm_eh_typeid_for =
+ CGM.getIntrinsic(llvm::Intrinsic::eh_typeid_for);
+ return Builder.CreateCall(llvm_eh_typeid_for, EmitScalarExpr(E->getArg(0)));
+ }
+}
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index b7d6bbd..863420d 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -2622,6 +2622,7 @@ public:
llvm::Value *EmitAMDGPUBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitSystemZBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitNVPTXBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
+ llvm::Value *EmitBPFBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E);
llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);
--
1.8.3.4
--
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