Struct cranelift_codegen::Context

pub struct Context {
    pub func: Function,
    pub cfg: ControlFlowGraph,
    pub domtree: DominatorTree,
    pub regalloc: Context,
    pub loop_analysis: LoopAnalysis,
}

Persistent data structures and compilation pipeline.

Fields

func: Function

The function we're compiling.

cfg: ControlFlowGraph

The control flow graph of func.

domtree: DominatorTree

Dominator tree for func.

regalloc: Context

Register allocation context.

loop_analysis: LoopAnalysis

Loop analysis of func.

Methods

impl Context

pub fn new() -> Self

Allocate a new compilation context.

The returned instance should be reused for compiling multiple functions in order to avoid needless allocator thrashing.

pub fn for_function(func: Function) -> Self

Allocate a new compilation context with an existing Function.

The returned instance should be reused for compiling multiple functions in order to avoid needless allocator thrashing.

pub fn clear(&mut self)

Clear all data structures in this context.

pub fn compile_and_emit(
    &mut self,
    isa: &dyn TargetIsa,
    mem: &mut Vec<u8>,
    relocs: &mut dyn RelocSink,
    traps: &mut dyn TrapSink
) -> CodegenResult<()>

Compile the function, and emit machine code into a Vec<u8>.

Run the function through all the passes necessary to generate code for the target ISA represented by isa, as well as the final step of emitting machine code into a Vec<u8>. The machine code is not relocated. Instead, any relocations are emitted into relocs.

This function calls compile and emit_to_memory, taking care to resize mem as needed, so it provides a safe interface.

pub fn compile(&mut self, isa: &dyn TargetIsa) -> CodegenResult<CodeOffset>

Compile the function.

Run the function through all the passes necessary to generate code for the target ISA represented by isa. This does not include the final step of emitting machine code into a code sink.

Returns the size of the function's code.

pub unsafe fn emit_to_memory(
    &self,
    isa: &dyn TargetIsa,
    mem: *mut u8,
    relocs: &mut dyn RelocSink,
    traps: &mut dyn TrapSink
)

Emit machine code directly into raw memory.

Write all of the function's machine code to the memory at mem. The size of the machine code is returned by compile above.

The machine code is not relocated. Instead, any relocations are emitted into relocs.

This function is unsafe since it does not perform bounds checking on the memory buffer, and it can't guarantee that the mem pointer is valid.

pub fn verify<'a, FOI: Into<FlagsOrIsa<'a>>>(
    &self,
    fisa: FOI
) -> VerifierResult<()>

Run the verifier on the function.

Also check that the dominator tree and control flow graph are consistent with the function.

pub fn verify_if<'a, FOI: Into<FlagsOrIsa<'a>>>(
    &self,
    fisa: FOI
) -> CodegenResult<()>

Run the verifier only if the enable_verifier setting is true.

pub fn verify_locations(&self, isa: &dyn TargetIsa) -> VerifierResult<()>

Run the locations verifier on the function.

pub fn verify_locations_if(&self, isa: &dyn TargetIsa) -> CodegenResult<()>

Run the locations verifier only if the enable_verifier setting is true.

pub fn dce<'a, FOI: Into<FlagsOrIsa<'a>>>(
    &mut self,
    fisa: FOI
) -> CodegenResult<()>

Perform dead-code elimination on the function.

pub fn preopt(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Perform pre-legalization rewrites on the function.

pub fn canonicalize_nans(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Perform NaN canonicalizing rewrites on the function.

pub fn legalize(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Run the legalizer for isa on the function.

pub fn postopt(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Perform post-legalization rewrites on the function.

pub fn compute_cfg(&mut self)

Compute the control flow graph.

pub fn compute_domtree(&mut self)

Compute dominator tree.

pub fn compute_loop_analysis(&mut self)

Compute the loop analysis.

pub fn flowgraph(&mut self)

Compute the control flow graph and dominator tree.

pub fn simple_gvn<'a, FOI: Into<FlagsOrIsa<'a>>>(
    &mut self,
    fisa: FOI
) -> CodegenResult<()>

Perform simple GVN on the function.

pub fn licm(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Perform LICM on the function.

pub fn eliminate_unreachable_code<'a, FOI>(
    &mut self,
    fisa: FOI
) -> CodegenResult<()> where
    FOI: Into<FlagsOrIsa<'a>>, 

Perform unreachable code elimination.

pub fn regalloc(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Run the register allocator.

pub fn prologue_epilogue(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Insert prologue and epilogues after computing the stack frame layout.

pub fn shrink_instructions(&mut self, isa: &dyn TargetIsa) -> CodegenResult<()>

Run the instruction shrinking pass.

pub fn relax_branches(
    &mut self,
    isa: &dyn TargetIsa
) -> CodegenResult<CodeOffset>

Run the branch relaxation pass and return the final code size.