Use ELF function index to distinguish generated functions.

We replaced LLVMLongName and LLVMStubName with ElfFuncName,
and we are using the simple name: Art0, Art1, ..., ArtN,
as the function name of every generated functions.  This
gives us 3 benefits:

1. We can avoid the ambiguous function name returned by
   LLVMLongName() in some special situation.

2. We don't need to have the art::Method object during
   the executable linking procedure.  Besides, this will
   make bootstrapping easier.

3. Reduce the size of the ELF executable, since we don't
   have to save a long function name, which usually contains
   more than 30 characters.

Change-Id: Ib698062b272458e847ad5545d7acf33a4dc9eb85

1 files changed, 2 insertions, 0 deletions

diff --git a/src/compiler_llvm/method_compiler.h b/src/compiler_llvm/method_compiler.h
index 006f7634ef..1ff3a9f9df 100644
--- a/src/compiler_llvm/method_compiler.h
+++ b/src/compiler_llvm/method_compiler.h
@@ -460,6 +460,8 @@ class MethodCompiler {
   llvm::BasicBlock* basic_block_unreachable_;
 
   llvm::AllocaInst* shadow_frame_;
+
+  uint16_t elf_func_idx_;
 };