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Optimize call.

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This commit is contained in:
losfair
2019-04-02 11:11:45 +08:00
parent 84e5a0c8eb
commit 4d6bbed905
2 changed files with 88 additions and 19 deletions
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50
lib/dynasm-backend/src/machine.rs
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@ -220,7 +220,7 @@ impl Machine {
) {
let mut delta_stack_offset: usize = 0;
for loc in locs {
for loc in locs.iter().rev() {
match *loc {
Location::GPR(ref x) => {
assert_eq!(self.used_gprs.remove(x), true);
@ -248,6 +248,52 @@ impl Machine {
}
}
pub fn release_locations_only_regs(
&mut self,
locs: &[Location]
) {
for loc in locs.iter().rev() {
match *loc {
Location::GPR(ref x) => {
assert_eq!(self.used_gprs.remove(x), true);
},
Location::XMM(ref x) => {
assert_eq!(self.used_xmms.remove(x), true);
},
_ => {}
}
}
}
pub fn release_locations_only_stack<E: Emitter>(
&mut self,
assembler: &mut E,
locs: &[Location]
) {
let mut delta_stack_offset: usize = 0;
for loc in locs.iter().rev() {
match *loc {
Location::Memory(GPR::RBP, x) => {
if x >= 0 {
unreachable!();
}
let offset = (-x) as usize;
if offset != self.stack_offset.0 {
unreachable!();
}
self.stack_offset.0 -= 8;
delta_stack_offset += 8;
},
_ => {}
}
}
if delta_stack_offset != 0 {
assembler.emit_add(Size::S64, Location::Imm32(delta_stack_offset as u32), Location::GPR(GPR::RSP));
}
}
pub fn release_locations_keep_state<E: Emitter>(
&self,
assembler: &mut E,
@ -255,7 +301,7 @@ impl Machine {
) {
let mut delta_stack_offset: usize = 0;
for loc in locs {
for loc in locs.iter().rev() {
match *loc {
Location::Memory(GPR::RBP, x) => {
if x >= 0 {