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remove the premature optimization of compare & branch operations

cache-refactoring
Gopal V 15 years ago
parent
0a512831af
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c9c58ca88a
1 changed files with 0 additions and 162 deletions
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  1. 162
      jit/jit-insn.c

162
jit/jit-insn.c
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@ -3549,18 +3549,12 @@ int jit_insn_branch(jit_function_t func, jit_label_t *label)
* @deftypefun int jit_insn_branch_if (jit_function_t @var{func}, jit_value_t @var{value}, jit_label_t *@var{label})
* Terminate the current block by branching to a specific label if
* the specified value is non-zero. Returns zero if out of memory.
*
* If @var{value} refers to a conditional expression that was created
* by @code{jit_insn_eq}, @code{jit_insn_ne}, etc, then the conditional
* expression will be replaced by an appropriate conditional branch
* instruction.
* @end deftypefun
@*/
int jit_insn_branch_if
(jit_function_t func, jit_value_t value, jit_label_t *label)
{
jit_insn_t insn;
jit_block_t block;
jit_type_t type;
int opcode;
jit_value_t value2;
@ -3603,80 +3597,6 @@ int jit_insn_branch_if
}
}
/* Determine if we can replace a previous comparison instruction */
block = func->builder->current_block;
insn = _jit_block_get_last(block);
if(value->is_temporary && insn && insn->dest == value)
{
opcode = insn->opcode;
if(opcode >= JIT_OP_IEQ && opcode <= JIT_OP_NFGE_INV)
{
switch(opcode)
{
case JIT_OP_IEQ: opcode = JIT_OP_BR_IEQ; break;
case JIT_OP_INE: opcode = JIT_OP_BR_INE; break;
case JIT_OP_ILT: opcode = JIT_OP_BR_ILT; break;
case JIT_OP_ILT_UN: opcode = JIT_OP_BR_ILT_UN; break;
case JIT_OP_ILE: opcode = JIT_OP_BR_ILE; break;
case JIT_OP_ILE_UN: opcode = JIT_OP_BR_ILE_UN; break;
case JIT_OP_IGT: opcode = JIT_OP_BR_IGT; break;
case JIT_OP_IGT_UN: opcode = JIT_OP_BR_IGT_UN; break;
case JIT_OP_IGE: opcode = JIT_OP_BR_IGE; break;
case JIT_OP_IGE_UN: opcode = JIT_OP_BR_IGE_UN; break;
case JIT_OP_LEQ: opcode = JIT_OP_BR_LEQ; break;
case JIT_OP_LNE: opcode = JIT_OP_BR_LNE; break;
case JIT_OP_LLT: opcode = JIT_OP_BR_LLT; break;
case JIT_OP_LLT_UN: opcode = JIT_OP_BR_LLT_UN; break;
case JIT_OP_LLE: opcode = JIT_OP_BR_LLE; break;
case JIT_OP_LLE_UN: opcode = JIT_OP_BR_LLE_UN; break;
case JIT_OP_LGT: opcode = JIT_OP_BR_LGT; break;
case JIT_OP_LGT_UN: opcode = JIT_OP_BR_LGT_UN; break;
case JIT_OP_LGE: opcode = JIT_OP_BR_LGE; break;
case JIT_OP_LGE_UN: opcode = JIT_OP_BR_LGE_UN; break;
case JIT_OP_FEQ: opcode = JIT_OP_BR_FEQ; break;
case JIT_OP_FNE: opcode = JIT_OP_BR_FNE; break;
case JIT_OP_FLT: opcode = JIT_OP_BR_FLT; break;
case JIT_OP_FLE: opcode = JIT_OP_BR_FLE; break;
case JIT_OP_FGT: opcode = JIT_OP_BR_FGT; break;
case JIT_OP_FGE: opcode = JIT_OP_BR_FGE; break;
case JIT_OP_FEQ_INV: opcode = JIT_OP_BR_FEQ_INV; break;
case JIT_OP_FNE_INV: opcode = JIT_OP_BR_FNE_INV; break;
case JIT_OP_FLT_INV: opcode = JIT_OP_BR_FLT_INV; break;
case JIT_OP_FLE_INV: opcode = JIT_OP_BR_FLE_INV; break;
case JIT_OP_FGT_INV: opcode = JIT_OP_BR_FGT_INV; break;
case JIT_OP_FGE_INV: opcode = JIT_OP_BR_FGE_INV; break;
case JIT_OP_DEQ: opcode = JIT_OP_BR_DEQ; break;
case JIT_OP_DNE: opcode = JIT_OP_BR_DNE; break;
case JIT_OP_DLT: opcode = JIT_OP_BR_DLT; break;
case JIT_OP_DLE: opcode = JIT_OP_BR_DLE; break;
case JIT_OP_DGT: opcode = JIT_OP_BR_DGT; break;
case JIT_OP_DGE: opcode = JIT_OP_BR_DGE; break;
case JIT_OP_DEQ_INV: opcode = JIT_OP_BR_DEQ_INV; break;
case JIT_OP_DNE_INV: opcode = JIT_OP_BR_DNE_INV; break;
case JIT_OP_DLT_INV: opcode = JIT_OP_BR_DLT_INV; break;
case JIT_OP_DLE_INV: opcode = JIT_OP_BR_DLE_INV; break;
case JIT_OP_DGT_INV: opcode = JIT_OP_BR_DGT_INV; break;
case JIT_OP_DGE_INV: opcode = JIT_OP_BR_DGE_INV; break;
case JIT_OP_NFEQ: opcode = JIT_OP_BR_NFEQ; break;
case JIT_OP_NFNE: opcode = JIT_OP_BR_NFNE; break;
case JIT_OP_NFLT: opcode = JIT_OP_BR_NFLT; break;
case JIT_OP_NFLE: opcode = JIT_OP_BR_NFLE; break;
case JIT_OP_NFGT: opcode = JIT_OP_BR_NFGT; break;
case JIT_OP_NFGE: opcode = JIT_OP_BR_NFGE; break;
case JIT_OP_NFEQ_INV: opcode = JIT_OP_BR_NFEQ_INV; break;
case JIT_OP_NFNE_INV: opcode = JIT_OP_BR_NFNE_INV; break;
case JIT_OP_NFLT_INV: opcode = JIT_OP_BR_NFLT_INV; break;
case JIT_OP_NFLE_INV: opcode = JIT_OP_BR_NFLE_INV; break;
case JIT_OP_NFGT_INV: opcode = JIT_OP_BR_NFGT_INV; break;
case JIT_OP_NFGE_INV: opcode = JIT_OP_BR_NFGE_INV; break;
}
insn->opcode = (short)opcode;
insn->flags = JIT_INSN_DEST_IS_LABEL;
insn->dest = (jit_value_t)(*label);
goto add_block;
}
}
/* Coerce the result to something comparable and determine the opcode */
type = jit_type_promote_int(jit_type_normalize(value->type));
if(type == jit_type_int || type == jit_type_uint)
@ -3740,7 +3660,6 @@ int jit_insn_branch_if
insn->value1 = value;
insn->value2 = value2;
add_block:
/* Add a new block for the fall-through case */
return jit_insn_new_block(func);
}
@ -3749,18 +3668,12 @@ add_block:
* @deftypefun int jit_insn_branch_if_not (jit_function_t @var{func}, jit_value_t @var{value}, jit_label_t *@var{label})
* Terminate the current block by branching to a specific label if
* the specified value is zero. Returns zero if out of memory.
*
* If @var{value} refers to a conditional expression that was created
* by @code{jit_insn_eq}, @code{jit_insn_ne}, etc, then the conditional
* expression will be replaced by an appropriate conditional branch
* instruction.
* @end deftypefun
@*/
int jit_insn_branch_if_not
(jit_function_t func, jit_value_t value, jit_label_t *label)
{
jit_insn_t insn;
jit_block_t block;
jit_type_t type;
int opcode;
jit_value_t value2;
@ -3803,80 +3716,6 @@ int jit_insn_branch_if_not
}
}
/* Determine if we can replace a previous comparison instruction */
block = func->builder->current_block;
insn = _jit_block_get_last(block);
if(value->is_temporary && insn && insn->dest == value)
{
opcode = insn->opcode;
if(opcode >= JIT_OP_IEQ && opcode <= JIT_OP_NFGE_INV)
{
switch(opcode)
{
case JIT_OP_IEQ: opcode = JIT_OP_BR_INE; break;
case JIT_OP_INE: opcode = JIT_OP_BR_IEQ; break;
case JIT_OP_ILT: opcode = JIT_OP_BR_IGE; break;
case JIT_OP_ILT_UN: opcode = JIT_OP_BR_IGE_UN; break;
case JIT_OP_ILE: opcode = JIT_OP_BR_IGT; break;
case JIT_OP_ILE_UN: opcode = JIT_OP_BR_IGT_UN; break;
case JIT_OP_IGT: opcode = JIT_OP_BR_ILE; break;
case JIT_OP_IGT_UN: opcode = JIT_OP_BR_ILE_UN; break;
case JIT_OP_IGE: opcode = JIT_OP_BR_ILT; break;
case JIT_OP_IGE_UN: opcode = JIT_OP_BR_ILT_UN; break;
case JIT_OP_LEQ: opcode = JIT_OP_BR_LNE; break;
case JIT_OP_LNE: opcode = JIT_OP_BR_LEQ; break;
case JIT_OP_LLT: opcode = JIT_OP_BR_LGE; break;
case JIT_OP_LLT_UN: opcode = JIT_OP_BR_LGE_UN; break;
case JIT_OP_LLE: opcode = JIT_OP_BR_LGT; break;
case JIT_OP_LLE_UN: opcode = JIT_OP_BR_LGT_UN; break;
case JIT_OP_LGT: opcode = JIT_OP_BR_LLE; break;
case JIT_OP_LGT_UN: opcode = JIT_OP_BR_LLE_UN; break;
case JIT_OP_LGE: opcode = JIT_OP_BR_LLT; break;
case JIT_OP_LGE_UN: opcode = JIT_OP_BR_LLT_UN; break;
case JIT_OP_FEQ: opcode = JIT_OP_BR_FNE_INV; break;
case JIT_OP_FNE: opcode = JIT_OP_BR_FEQ_INV; break;
case JIT_OP_FLT: opcode = JIT_OP_BR_FGE_INV; break;
case JIT_OP_FLE: opcode = JIT_OP_BR_FGT_INV; break;
case JIT_OP_FGT: opcode = JIT_OP_BR_FLE_INV; break;
case JIT_OP_FGE: opcode = JIT_OP_BR_FLT_INV; break;
case JIT_OP_FEQ_INV: opcode = JIT_OP_BR_FNE; break;
case JIT_OP_FNE_INV: opcode = JIT_OP_BR_FEQ; break;
case JIT_OP_FLT_INV: opcode = JIT_OP_BR_FGE; break;
case JIT_OP_FLE_INV: opcode = JIT_OP_BR_FGT; break;
case JIT_OP_FGT_INV: opcode = JIT_OP_BR_FLE; break;
case JIT_OP_FGE_INV: opcode = JIT_OP_BR_FLT; break;
case JIT_OP_DEQ: opcode = JIT_OP_BR_DNE_INV; break;
case JIT_OP_DNE: opcode = JIT_OP_BR_DEQ_INV; break;
case JIT_OP_DLT: opcode = JIT_OP_BR_DGE_INV; break;
case JIT_OP_DLE: opcode = JIT_OP_BR_DGT_INV; break;
case JIT_OP_DGT: opcode = JIT_OP_BR_DLE_INV; break;
case JIT_OP_DGE: opcode = JIT_OP_BR_DLT_INV; break;
case JIT_OP_DEQ_INV: opcode = JIT_OP_BR_DNE; break;
case JIT_OP_DNE_INV: opcode = JIT_OP_BR_DEQ; break;
case JIT_OP_DLT_INV: opcode = JIT_OP_BR_DGE; break;
case JIT_OP_DLE_INV: opcode = JIT_OP_BR_DGT; break;
case JIT_OP_DGT_INV: opcode = JIT_OP_BR_DLE; break;
case JIT_OP_DGE_INV: opcode = JIT_OP_BR_DLT; break;
case JIT_OP_NFEQ: opcode = JIT_OP_BR_NFNE_INV; break;
case JIT_OP_NFNE: opcode = JIT_OP_BR_NFEQ_INV; break;
case JIT_OP_NFLT: opcode = JIT_OP_BR_NFGE_INV; break;
case JIT_OP_NFLE: opcode = JIT_OP_BR_NFGT_INV; break;
case JIT_OP_NFGT: opcode = JIT_OP_BR_NFLE_INV; break;
case JIT_OP_NFGE: opcode = JIT_OP_BR_NFLT_INV; break;
case JIT_OP_NFEQ_INV: opcode = JIT_OP_BR_NFNE; break;
case JIT_OP_NFNE_INV: opcode = JIT_OP_BR_NFEQ; break;
case JIT_OP_NFLT_INV: opcode = JIT_OP_BR_NFGE; break;
case JIT_OP_NFLE_INV: opcode = JIT_OP_BR_NFGT; break;
case JIT_OP_NFGT_INV: opcode = JIT_OP_BR_NFLE; break;
case JIT_OP_NFGE_INV: opcode = JIT_OP_BR_NFLT; break;
}
insn->opcode = (short)opcode;
insn->flags = JIT_INSN_DEST_IS_LABEL;
insn->dest = (jit_value_t)(*label);
goto add_block;
}
}
/* Coerce the result to something comparable and determine the opcode */
type = jit_type_promote_int(jit_type_normalize(value->type));
if(type == jit_type_int || type == jit_type_uint)
@ -3940,7 +3779,6 @@ int jit_insn_branch_if_not
insn->value1 = value;
insn->value2 = value2;
add_block:
/* Add a new block for the fall-through case */
return jit_insn_new_block(func);
}

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