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Cleanup.

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This commit is contained in:
losfair
2019-04-11 09:41:18 +08:00
parent 2d72bbf834
commit 799e1d8dec
7 changed files with 24 additions and 5510 deletions
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45
lib/dynasm-backend/src/machine.rs
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@ -1,6 +1,7 @@
use crate::emitter_x64::*;
use std::collections::HashSet;
use wasmparser::Type as WpType;
use smallvec::SmallVec;
struct MachineStackOffset(usize);
@ -142,36 +143,6 @@ impl Machine {
assert_eq!(self.used_xmms.remove(&xmm), true);
}
/// Acquires stack locations from the machine state.
pub fn acquire_stack_locations<E: Emitter>(
&mut self,
assembler: &mut E,
n: usize,
zeroed: bool,
) -> Vec<Location> {
let mut ret = vec![];
let mut delta_stack_offset: usize = 0;
for _ in 0..n {
let loc = {
self.stack_offset.0 += 8;
delta_stack_offset += 8;
Location::Memory(GPR::RBP, -(self.stack_offset.0 as i32))
};
ret.push(loc);
}
if delta_stack_offset != 0 {
assembler.emit_sub(Size::S64, Location::Imm32(delta_stack_offset as u32), Location::GPR(GPR::RSP));
}
if zeroed {
for i in 0..n {
assembler.emit_mov(Size::S64, Location::Imm32(0), ret[i]);
}
}
ret
}
/// Acquires locations from the machine state.
///
/// If the returned locations are used for stack value, `release_location` needs to be called on them;
@ -181,8 +152,8 @@ impl Machine {
assembler: &mut E,
tys: &[WpType],
zeroed: bool,
) -> Vec<Location> {
let mut ret = vec![];
) -> SmallVec<[Location; 1]> {
let mut ret = smallvec![];
let mut delta_stack_offset: usize = 0;
for ty in tys {
@ -351,7 +322,7 @@ impl Machine {
for i in 0..n_params {
let loc = Self::get_param_location(i + 1);
locations.push(match loc {
Location::GPR(x) => {
Location::GPR(_) => {
let old_idx = allocated;
allocated += 1;
get_local_location(old_idx)
@ -362,7 +333,7 @@ impl Machine {
}
// Determine locations for normal locals.
for i in n_params..n {
for _ in n_params..n {
locations.push(get_local_location(allocated));
allocated += 1;
}
@ -383,7 +354,7 @@ impl Machine {
// Save callee-saved registers.
for loc in locations.iter() {
if let Location::GPR(x) = *loc {
if let Location::GPR(_) = *loc {
a.emit_push(Size::S64, *loc);
self.stack_offset.0 += 8;
}
@ -400,7 +371,7 @@ impl Machine {
for i in 0..n_params {
let loc = Self::get_param_location(i + 1);
match loc {
Location::GPR(x) => {
Location::GPR(_) => {
a.emit_mov(Size::S64, loc, locations[i]);
},
_ => break
@ -427,7 +398,7 @@ impl Machine {
// Restore callee-saved registers.
for loc in locations.iter().rev() {
if let Location::GPR(x) = *loc {
if let Location::GPR(_) = *loc {
a.emit_pop(Size::S64, *loc);
}
}