6b88cd44a8
* Update to rustfmt-preview. * Run "cargo fmt --all" with rustfmt 0.4.1. rustfmt 0.4.1 is the latest release of rustfmt-preview available on the stable channel. * Fix a long line that rustfmt 0.4.1 can't handle. * Remove unneeded commas left behind by rustfmt.
28 lines
967 B
Rust
28 lines
967 B
Rust
//! Expanding instructions as runtime library calls.
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use ir;
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use ir::{get_libcall_funcref, InstBuilder};
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use isa::TargetIsa;
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use std::vec::Vec;
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/// Try to expand `inst` as a library call, returning true is successful.
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pub fn expand_as_libcall(inst: ir::Inst, func: &mut ir::Function, isa: &TargetIsa) -> bool {
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// Does the opcode/ctrl_type combo even have a well-known runtime library name.
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let libcall = match ir::LibCall::for_inst(func.dfg[inst].opcode(), func.dfg.ctrl_typevar(inst))
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{
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Some(lc) => lc,
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None => return false,
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};
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// Now we convert `inst` to a call. First save the arguments.
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let mut args = Vec::new();
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args.extend_from_slice(func.dfg.inst_args(inst));
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// The replace builder will preserve the instruction result values.
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let funcref = get_libcall_funcref(libcall, func, inst, isa);
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func.dfg.replace(inst).call(funcref, &args);
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// TODO: ask the ISA to legalize the signature.
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true
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}
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