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Lint fixes (#99)

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* Replace a single-character string literal with a character literal.

* Use is_some() instead of comparing with Some(_).

* Add code-quotes around type names in comments.

* Use !...is_empty() instead of len() != 0.

* Tidy up redundant returns.

* Remove redundant .clone() calls.

* Remove unnecessary explicit lifetime parameters.

* Tidy up unnecessary '&'s.

* Add parens to make operator precedence explicit.

* Use debug_assert_eq instead of debug_assert with ==.

* Replace a &Vec argument with a &[...].

* Replace `a = a op b` with `a op= b`.

* Avoid unnecessary closures.

* Avoid .iter() and .iter_mut() for iterating over containers.

* Remove unneeded qualification.
This commit is contained in:
Dan Gohman
2017-06-19 16:24:10 -07:00
committed by Jakob Stoklund Olesen
parent 1a480a2578
commit 61a0844b24
24 changed files with 132 additions and 137 deletions
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29
lib/cretonne/src/licm.rs
View File

@@ -21,18 +21,13 @@ pub fn do_licm(func: &mut Function,
let invariant_inst = remove_loop_invariant_instructions(lp, func, cfg, loop_analysis);
// Then we create the loop's pre-header and fill it with the invariant instructions
// Then we remove the invariant instructions from the loop body
if invariant_inst.len() > 0 {
if !invariant_inst.is_empty() {
// If the loop has a natural pre-header we use it, otherwise we create it.
let mut pos;
match has_pre_header(&func.layout,
cfg,
domtree,
loop_analysis.loop_header(lp).clone()) {
match has_pre_header(&func.layout, cfg, domtree, loop_analysis.loop_header(lp)) {
None => {
let pre_header = create_pre_header(loop_analysis.loop_header(lp).clone(),
func,
cfg,
domtree);
let pre_header =
create_pre_header(loop_analysis.loop_header(lp), func, cfg, domtree);
pos = Cursor::new(&mut func.layout);
pos.goto_bottom(pre_header);
pos.prev_inst();
@@ -47,7 +42,7 @@ pub fn do_licm(func: &mut Function,
// The last instruction of the pre-header is the termination instruction (usually
// a jump) so we need to insert just before this.
for inst in invariant_inst {
pos.insert_inst(inst.clone());
pos.insert_inst(inst);
}
}
}
@@ -146,7 +141,7 @@ fn remove_loop_invariant_instructions(lp: Loop,
for ebb in postorder_ebbs_loop(loop_analysis, cfg, lp).iter().rev() {
// Arguments of the EBB are loop values
for val in func.dfg.ebb_args(*ebb) {
loop_values.insert(val.clone());
loop_values.insert(*val);
}
pos.goto_top(*ebb);
while let Some(inst) = pos.next_inst() {
@@ -164,7 +159,7 @@ fn remove_loop_invariant_instructions(lp: Loop,
// If the instruction is not loop-invariant we push its results in the set of
// loop values
for out in func.dfg.inst_results(inst) {
loop_values.insert(out.clone());
loop_values.insert(*out);
}
}
}
@@ -176,7 +171,7 @@ fn remove_loop_invariant_instructions(lp: Loop,
fn postorder_ebbs_loop(loop_analysis: &LoopAnalysis, cfg: &ControlFlowGraph, lp: Loop) -> Vec<Ebb> {
let mut grey = HashSet::new();
let mut black = HashSet::new();
let mut stack = vec![loop_analysis.loop_header(lp).clone()];
let mut stack = vec![loop_analysis.loop_header(lp)];
let mut postorder = Vec::new();
while !stack.is_empty() {
@@ -187,13 +182,13 @@ fn postorder_ebbs_loop(loop_analysis: &LoopAnalysis, cfg: &ControlFlowGraph, lp:
stack.push(node);
// Get any children we've never seen before.
for child in cfg.get_successors(node) {
if loop_analysis.is_in_loop(child.clone(), lp) && !grey.contains(child) {
stack.push(child.clone());
if loop_analysis.is_in_loop(*child, lp) && !grey.contains(child) {
stack.push(*child);
}
}
} else if !black.contains(&node) {
postorder.push(node.clone());
black.insert(node.clone());
postorder.push(node);
black.insert(node);
}
}
postorder