user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Handle operand temps for function calls

Browse source 
This allows temporary destinations for function calls to have their
allocas omitted.
This commit is contained in:
James Miller 2016-04-04 19:21:27 +12:00
parent 9c2186d4d7
commit e4d4fa3295
5 changed files with 191 additions and 45 deletions
Download patch file Download diff file Expand all files Collapse all files

5
src/librustc/middle/region.rs
View file

@ -45,8 +45,9 @@ impl fmt::Debug for CodeExtent {
ty::tls::with_opt(|opt_tcx| {
if let Some(tcx) = opt_tcx {
let data = tcx.region_maps.code_extents.borrow()[self.0 as usize];
write!(f, "/{:?}", data)?;
if let Some(data) = tcx.region_maps.code_extents.borrow().get(self.0 as usize) {
write!(f, "/{:?}", data)?;
}
}
Ok(())
})?;

7
src/librustc/mir/visit.rs
View file

@ -407,7 +407,7 @@ macro_rules! make_mir_visitor {
self.visit_operand(arg);
}
if let Some((ref $($mutability)* destination, target)) = *destination {
self.visit_lvalue(destination, LvalueContext::Store);
self.visit_lvalue(destination, LvalueContext::Call);
self.visit_branch(block, target);
}
cleanup.map(|t| self.visit_branch(block, t));
@ -692,9 +692,12 @@ make_mir_visitor!(MutVisitor,mut);
#[derive(Copy, Clone, Debug)]
pub enum LvalueContext {
// Appears as LHS of an assignment or as dest of a call
// Appears as LHS of an assignment
Store,
// Dest of a call
Call,
// Being dropped
Drop,