4e67e08efd
This switches from a custom list of architectures to use the target-lexicon crate. - "set is_64bit=1; isa x86" is replaced with "target x86_64", and similar for other architectures, and the `is_64bit` flag is removed entirely. - The `is_compressed` flag is removed too; it's no longer being used to control REX prefixes on x86-64, ARM and Thumb are separate architectures in target-lexicon, and we can figure out how to select RISC-V compressed encodings when we're ready.
54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
//! Legalization of calls.
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//!
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//! This module exports the `expand_call` function which transforms a `call`
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//! instruction into `func_addr` and `call_indirect` instructions.
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use cursor::{Cursor, FuncCursor};
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use flowgraph::ControlFlowGraph;
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use ir::{self, InstBuilder};
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use isa::TargetIsa;
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/// Expand a `call` instruction.
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pub fn expand_call(
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inst: ir::Inst,
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func: &mut ir::Function,
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_cfg: &mut ControlFlowGraph,
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isa: &TargetIsa,
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) {
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// Unpack the instruction.
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let (func_ref, old_args) = match func.dfg[inst] {
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ir::InstructionData::Call {
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opcode,
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ref args,
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func_ref,
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} => {
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debug_assert_eq!(opcode, ir::Opcode::Call);
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(func_ref, args.clone())
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}
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_ => panic!("Wanted call: {}", func.dfg.display_inst(inst, None)),
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};
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let ptr_ty = isa.pointer_type();
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let sig = func.dfg.ext_funcs[func_ref].signature;
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let callee = {
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let mut pos = FuncCursor::new(func).at_inst(inst);
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pos.use_srcloc(inst);
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pos.ins().func_addr(ptr_ty, func_ref)
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};
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let mut new_args = ir::ValueList::default();
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new_args.push(callee, &mut func.dfg.value_lists);
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for i in 0..old_args.len(&func.dfg.value_lists) {
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new_args.push(
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old_args.as_slice(&func.dfg.value_lists)[i],
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&mut func.dfg.value_lists,
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);
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}
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func.dfg
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.replace(inst)
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.CallIndirect(ir::Opcode::CallIndirect, ptr_ty, sig, new_args);
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}
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