d4197ca731
The Builder keeps track of a position in the layout and inserts new instructions there. Add insert_ebb() and ebb() methods to Builder. Use Builder in the cfg tests.
56 lines
2.0 KiB
Rust
56 lines
2.0 KiB
Rust
//! Cretonne instruction builder.
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//!
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//! A `Builder` provides a convenient interface for inserting instructions into a Cretonne
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//! function. Many of its methods are generated from the meta language instruction definitions.
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use ir::{types, instructions};
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use ir::{InstructionData, DataFlowGraph, Cursor};
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use ir::{Opcode, Type, Inst, Value, Ebb, JumpTable, VariableArgs, FuncRef};
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use ir::immediates::{Imm64, Uimm8, Ieee32, Ieee64, ImmVector};
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use ir::condcodes::{IntCC, FloatCC};
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/// Instruction builder.
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///
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/// A `Builder` holds mutable references to a data flow graph and a layout cursor. It provides
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/// convenience method for creating and inserting instructions at the current cursor position.
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pub struct Builder<'a> {
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pub dfg: &'a mut DataFlowGraph,
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pub pos: &'a mut Cursor<'a>,
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}
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impl<'a> Builder<'a> {
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/// Create a new builder which inserts instructions at `pos`.
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/// The `dfg` and `pos.layout` references should be from the same `Function`.
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pub fn new(dfg: &'a mut DataFlowGraph, pos: &'a mut Cursor<'a>) -> Builder<'a> {
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Builder {
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dfg: dfg,
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pos: pos,
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}
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}
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/// Create and insert an EBB. Further instructions will be inserted into the new EBB.
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pub fn ebb(&mut self) -> Ebb {
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let ebb = self.dfg.make_ebb();
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self.insert_ebb(ebb);
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ebb
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}
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/// Insert an existing EBB at the current position. Further instructions will be inserted into
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/// the new EBB.
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pub fn insert_ebb(&mut self, ebb: Ebb) {
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self.pos.insert_ebb(ebb);
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}
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// Create and insert an instruction.
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// This method is used by the generated format-specific methods.
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fn insert_inst(&mut self, data: InstructionData) -> Inst {
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let inst = self.dfg.make_inst(data);
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self.pos.insert_inst(inst);
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inst
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}
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}
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// Include code generated by `meta/gen_instr.py`. This file includes `Builder` methods per
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// instruction format and per opcode for inserting instructions.
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include!(concat!(env!("OUT_DIR"), "/builder.rs"));
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