Lazy pushing shadow frame.

Function:
aget v0, v1, v2
return v0

Original:
push shadow frame;
if (null pointer)        { throw; pop shadow frame; unwind; }
if (index out of bounds) { throw; pop shadow frame; unwind; }
load from array;
pop shadow frame;
return;

New:
if (null pointer)        { push shadow frame; throw; pop shadow frame; unwind; }
if (index out of bounds) { push shadow frame; throw; pop shadow frame; unwind; }
load from array;
return;

Change-Id: I7fc0ff12b9a5454f8e1491b9ce1cdef3afcbed23

1 files changed, 5 insertions, 0 deletions

diff --git a/src/compiler_llvm/method_compiler.h b/src/compiler_llvm/method_compiler.h
index 9e4c81b5b8..44ab863c4a 100644
--- a/src/compiler_llvm/method_compiler.h
+++ b/src/compiler_llvm/method_compiler.h
@@ -264,6 +264,7 @@ class MethodCompiler {
   void EmitMarkGCCard(llvm::Value* value, llvm::Value* target_addr);
 
   // Shadow frame helper function
+  void EmitPushShadowFrame(bool is_inline);
   void EmitPopShadowFrame();
   void EmitUpdateDexPC(uint32_t dex_pc);
 
@@ -430,6 +431,7 @@ class MethodCompiler {
     bool has_invoke;
     bool need_shadow_frame_entry;
     bool need_shadow_frame;
+    bool lazy_push_shadow_frame;
   };
   MethodInfo method_info_;
 
@@ -474,6 +476,9 @@ class MethodCompiler {
   llvm::AllocaInst* jvalue_temp_;
   llvm::Value* old_shadow_frame_;
 
+  llvm::Value* already_pushed_shadow_frame_;
+  uint32_t shadow_frame_size_;
+
   uint16_t elf_func_idx_;
 };