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Assert if newly added instructions break the Basic Block invariant.

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This commit is contained in:
Nicolas B. Pierron
2019-07-25 14:33:25 +02:00
committed by GitHub
parent 42ebd2a5f4
commit feecd23967
1 changed files with 45 additions and 0 deletions
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45
cranelift/codegen/src/cursor.rs
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@@ -635,6 +635,28 @@ impl<'c, 'f> ir::InstInserterBase<'c> for &'c mut FuncCursor<'f> {
}
fn insert_built_inst(self, inst: ir::Inst, _: ir::Type) -> &'c mut ir::DataFlowGraph {
// TODO: Remove this assertion once #796 is fixed.
#[cfg(feature = "basic-blocks")]
#[cfg(debug_assertions)]
{
if let CursorPosition::At(_) = self.position() {
if let Some(curr) = self.current_inst() {
if let Some(prev) = self.layout().prev_inst(curr) {
let prev_op = self.data_flow_graph()[prev].opcode();
let inst_op = self.data_flow_graph()[inst].opcode();
let curr_op = self.data_flow_graph()[curr].opcode();
if prev_op.is_branch() && !prev_op.is_terminator() {
if !inst_op.is_terminator() {
panic!(
"Inserting instruction {} after {}, and before {}",
inst_op, prev_op, curr_op
)
};
}
};
};
};
}
self.insert_inst(inst);
if !self.srcloc.is_default() {
self.func.srclocs[inst] = self.srcloc;
@@ -742,6 +764,29 @@ impl<'c, 'f> ir::InstInserterBase<'c> for &'c mut EncCursor<'f> {
inst: ir::Inst,
ctrl_typevar: ir::Type,
) -> &'c mut ir::DataFlowGraph {
// TODO: Remove this assertion once #796 is fixed.
#[cfg(feature = "basic-blocks")]
#[cfg(debug_assertions)]
{
if let CursorPosition::At(_) = self.position() {
if let Some(curr) = self.current_inst() {
if let Some(prev) = self.layout().prev_inst(curr) {
let prev_op = self.data_flow_graph()[prev].opcode();
let inst_op = self.data_flow_graph()[inst].opcode();
if prev_op.is_branch() && !prev_op.is_terminator() {
if !inst_op.is_terminator() {
panic!(
"Inserting instruction {} after {} and before {}",
self.display_inst(inst),
self.display_inst(prev),
self.display_inst(curr)
)
};
}
};
};
};
}
// Insert the instruction and remember the reference.
self.insert_inst(inst);
self.built_inst = Some(inst);