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Avoid useless move

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This commit is contained in:
Dmitry Stogov 2022-09-20 00:26:56 +03:00
parent eacb9c1528
commit 63f21925b3
2 changed files with 28 additions and 18 deletions
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11
ir_aarch64.dasc
View File

@ -4319,9 +4319,14 @@ static int ir_emit_dessa_move(ir_ctx *ctx, uint8_t type, ir_ref from, ir_ref to)
ir_emit_load(ctx, type, from_reg, from);
}
if (to_reg != IR_REG_NONE && (to_reg & IR_REG_SPILL_STORE)) {
if (from_reg != IR_REG_NONE) {
/* store directly into spill slot (valid only when to_reg register is not reused) */
to_reg = IR_REG_NONE;
} else {
to_reg &= ~IR_REG_SPILL_STORE;
spill_store = 1;
}
}
if (from_reg != IR_REG_NONE && to_reg != IR_REG_NONE) {
if (from_reg != to_reg) {
ir_emit_mov(ctx, type, to_reg, from_reg);
@ -4347,13 +4352,13 @@ static int ir_emit_dessa_move(ir_ctx *ctx, uint8_t type, ir_ref from, ir_ref to)
ir_emit_load(ctx, type, from_reg, from);
}
if (to_reg != IR_REG_NONE && (to_reg & IR_REG_SPILL_STORE)) {
#if 1
if (from_reg != IR_REG_NONE) {
/* store directly into spill slot (valid only when to_reg register is not reused) */
to_reg = IR_REG_NONE;
#else
} else {
to_reg &= ~IR_REG_SPILL_STORE;
spill_store = 1;
#endif
}
}
if (from_reg != IR_REG_NONE && to_reg != IR_REG_NONE) {
if (from_reg != to_reg) {

11
ir_x86.dasc
View File

@ -6736,9 +6736,14 @@ static int ir_emit_dessa_move(ir_ctx *ctx, uint8_t type, ir_ref from, ir_ref to)
ir_emit_load(ctx, type, from_reg, from);
}
if (to_reg != IR_REG_NONE && (to_reg & IR_REG_SPILL_STORE)) {
if (from_reg != IR_REG_NONE) {
/* store directly into spill slot (valid only when to_reg register is not reused) */
to_reg = IR_REG_NONE;
} else {
to_reg &= ~IR_REG_SPILL_STORE;
spill_store = 1;
}
}
if (from_reg != IR_REG_NONE && to_reg != IR_REG_NONE) {
if (from_reg != to_reg) {
ir_emit_mov(ctx, type, to_reg, from_reg);
@ -6769,13 +6774,13 @@ static int ir_emit_dessa_move(ir_ctx *ctx, uint8_t type, ir_ref from, ir_ref to)
ir_emit_load(ctx, type, from_reg, from);
}
if (to_reg != IR_REG_NONE && (to_reg & IR_REG_SPILL_STORE)) {
#if 1
if (from_reg != IR_REG_NONE) {
/* store directly into spill slot (valid only when to_reg register is not reused) */
to_reg = IR_REG_NONE;
#else
} else {
to_reg &= ~IR_REG_SPILL_STORE;
spill_store = 1;
#endif
}
}
if (from_reg != IR_REG_NONE && to_reg != IR_REG_NONE) {
if (from_reg != to_reg) {