Enable Load Store Elimination for ARM and ARM64
This patch refactors the implementation of the LoadStoreElimination
optimisation pass. Please note that this pass was disabled and not
functional for any of the backends.
The current implementation tracks aliases and handles DalvikRegs as well
as Heap memory regions. It has been tested and it is known to optimise
out the following:
* Load - Load
* Store - Load
* Store - Store
* Load Literals
Change-Id: Iefae9b696f87f833ef35c451ed4d49c5a1b6fde0
diff --git a/compiler/dex/quick/arm64/codegen_arm64.h b/compiler/dex/quick/arm64/codegen_arm64.h
index 8d15326..472b5a1 100644
--- a/compiler/dex/quick/arm64/codegen_arm64.h
+++ b/compiler/dex/quick/arm64/codegen_arm64.h
@@ -308,6 +308,7 @@
bool WideFPRsAreAliases() OVERRIDE {
return true; // 64b architecture.
}
+ size_t GetInstructionOffset(LIR* lir);
private:
/**
@@ -390,6 +391,7 @@
RegLocation GenDivRem(RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2,
bool is_div, bool check_zero);
RegLocation GenDivRemLit(RegLocation rl_dest, RegLocation rl_src1, int lit, bool is_div);
+ size_t GetLoadStoreSize(LIR* lir);
};
} // namespace art