Adding a collector name attribute to Function in the IR. These

methods are new to Function:

  bool hasCollector() const;
  const std::string &getCollector() const;
  void setCollector(const std::string &);
  void clearCollector();

The assembly representation is as such:

  define void @f() gc "shadow-stack" { ...

The implementation uses an on-the-side table to map Functions to 
collector names, such that there is no overhead. A StringPool is 
further used to unique collector names, which are extremely
likely to be unique per process.

llvm-svn: 44769

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index a9228bcfc30..d3308eff638 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -339,6 +339,8 @@ LLVMValueRef LLVMGetParam(LLVMValueRef Fn, unsigned Index);
 unsigned LLVMGetIntrinsicID(LLVMValueRef Fn);
 unsigned LLVMGetFunctionCallConv(LLVMValueRef Fn);
 void LLVMSetFunctionCallConv(LLVMValueRef Fn, unsigned CC);
+const char *LLVMGetCollector(LLVMValueRef Fn);
+void LLVMSetCollector(LLVMValueRef Fn, const char *Coll);
 
 /* Operations on basic blocks */
 LLVMValueRef LLVMBasicBlockAsValue(LLVMBasicBlockRef Bb);