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Introduce parser-time optimization that moves function's argument values to registers.

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For functions with the optimization applied:
 - vm puts arguments values immediately to registers without putting them to variables in lexical environment;
 - number of arguments is extracted from corresponding 'reg_var_decl' instruction's argument;
 - for functions that also don't have local variables, lexical environments are not created.

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
This commit is contained in:
Ruben Ayrapetyan
2015-10-26 16:23:06 +03:00
parent 46c65985e5
commit 1fe2817457
16 changed files with 604 additions and 194 deletions
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jerry-core/vm/vm-opcodes.inc.h
+3 -2
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@@ -292,9 +292,10 @@ VM_OP_3 (is_false_jmp_down, IS_FALSE_JMP_DOWN,
VM_OP_1 (var_decl, VAR_DECL,
variable_name, VM_OP_ARG_TYPE_STRING)
VM_OP_2 (reg_var_decl, REG_VAR_DECL,
VM_OP_3 (reg_var_decl, REG_VAR_DECL,
tmp_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST,
local_var_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST)
local_var_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST,
arg_regs_num, VM_OP_ARG_TYPE_INTEGER_CONST)
VM_OP_3 (meta, META,
type, VM_OP_ARG_TYPE_INTEGER_CONST,