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Attach encodings to regmove instructions generated during coloring.

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All emitted regmove instructions must be materialized as real move
instructions.
This commit is contained in:
Jakob Stoklund Olesen
2017-07-12 10:37:50 -07:00
parent 2ee37784ff
commit abc1743486
1 changed files with 13 additions and 4 deletions
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17
lib/cretonne/src/regalloc/coloring.rs
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@@ -43,7 +43,8 @@
//! The exception is the entry block whose arguments are colored from the ABI requirements.
use dominator_tree::DominatorTree;
use ir::{Ebb, Inst, Value, Function, Cursor, ValueLoc, DataFlowGraph, Layout, ValueLocations};
use ir::{Ebb, Inst, Value, Function, Cursor, ValueLoc, DataFlowGraph, Layout};
use ir::{InstEncodings, ValueLocations};
use ir::{InstBuilder, Signature, ArgumentType, ArgumentLoc};
use isa::{RegUnit, RegClass, RegInfo, regs_overlap};
use isa::{TargetIsa, EncInfo, RecipeConstraints, OperandConstraint, ConstraintKind};
@@ -156,6 +157,7 @@ impl<'a> Context<'a> {
tracker,
&mut regs,
&mut func.locations,
&mut func.encodings,
&func.signature);
} else {
let (_throughs, kills) = tracker.process_ghost(inst);
@@ -279,6 +281,7 @@ impl<'a> Context<'a> {
tracker: &mut LiveValueTracker,
regs: &mut AllocatableSet,
locations: &mut ValueLocations,
encodings: &mut InstEncodings,
func_signature: &Signature) {
dbg!("Coloring {}\n {}",
dfg.display_inst(inst, self.isa),
@@ -354,7 +357,7 @@ impl<'a> Context<'a> {
// The solution and/or fixed input constraints may require us to shuffle the set of live
// registers around.
self.shuffle_inputs(pos, dfg, regs);
self.shuffle_inputs(pos, dfg, regs, encodings);
// If this is the first time we branch to `dest`, color its arguments to match the current
// register state.
@@ -695,12 +698,18 @@ impl<'a> Context<'a> {
fn shuffle_inputs(&mut self,
pos: &mut Cursor,
dfg: &mut DataFlowGraph,
regs: &mut AllocatableSet) {
regs: &mut AllocatableSet,
encodings: &mut InstEncodings) {
self.solver.schedule_moves(regs);
for m in self.solver.moves() {
let ty = dfg.value_type(m.value);
self.divert.regmove(m.value, m.from, m.to);
dfg.ins(pos).regmove(m.value, m.from, m.to);
let inst = dfg.ins(pos).regmove(m.value, m.from, m.to);
match self.isa.encode(dfg, &dfg[inst], ty) {
Ok(encoding) => *encodings.ensure(inst) = encoding,
_ => panic!("Can't encode {} {}", m.rc, dfg.display_inst(inst, self.isa)),
}
}
}