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Add a Context::emit_to_memory function.

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This function will emit the binary machine code into contiguous raw
memory while sending relocations to a RelocSink.

Add a MemoryCodeSink for generating machine code directly into memory
efficiently. Allow the TargetIsa to provide emit_function
implementations that are specialized to the MemoryCodeSink type to avoid
needless small virtual callbacks to put1() et etc.
This commit is contained in:
Jakob Stoklund Olesen
2017-07-17 18:13:05 -07:00
parent 9dc92eb8b3
commit 2f7057b96f
9 changed files with 168 additions and 13 deletions
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9
lib/cretonne/src/isa/mod.rs
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@@ -44,7 +44,7 @@ pub use isa::constraints::{RecipeConstraints, OperandConstraint, ConstraintKind,
pub use isa::encoding::{Encoding, EncInfo};
pub use isa::registers::{RegInfo, RegUnit, RegClass, RegClassIndex, regs_overlap};
use binemit::CodeSink;
use binemit;
use settings;
use ir;
use regalloc;
@@ -215,7 +215,12 @@ pub trait TargetIsa {
///
/// Note that this will call `put*` methods on the trait object via its vtable which is not the
/// fastest way of emitting code.
fn emit_inst(&self, func: &ir::Function, inst: ir::Inst, sink: &mut CodeSink);
fn emit_inst(&self, func: &ir::Function, inst: ir::Inst, sink: &mut binemit::CodeSink);
/// Emit a whole function into memory.
///
/// This is more performant than calling `emit_inst` for each instruction.
fn emit_function(&self, func: &ir::Function, sink: &mut binemit::MemoryCodeSink);
/// Get a static array of names associated with relocations in this ISA.
///