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cranelift: refactor unwind logic to accommodate multiple backends (#2357)

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*    Make cranelift_codegen::isa::unwind::input public
*    Move UnwindCode's common offset field out of the structure
*    Make MachCompileResult::unwind_info more generic
*    Record initial stack pointer offset
This commit is contained in:
Yury Delendik
2020-11-05 16:57:40 -06:00
committed by GitHub
parent df59ffb1b6
commit f60c0f3ec3
15 changed files with 396 additions and 351 deletions
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4
cranelift/codegen/src/machinst/vcode.rs
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@@ -560,7 +560,7 @@ impl<I: VCodeInst> VCode<I> {
/// Generates unwind info.
pub fn unwind_info(
&self,
) -> crate::result::CodegenResult<Option<crate::isa::unwind::UnwindInfo>> {
) -> crate::result::CodegenResult<Option<crate::isa::unwind::input::UnwindInfo<Reg>>> {
let layout = &self.insts_layout.borrow();
let (prologue, epilogues) = self.prologue_epilogue_ranges.as_ref().unwrap();
let context = UnwindInfoContext {
@@ -570,7 +570,7 @@ impl<I: VCodeInst> VCode<I> {
prologue: prologue.clone(),
epilogues,
};
I::UnwindInfo::create_unwind_info(context, self.abi.unwind_info_kind())
I::UnwindInfo::create_unwind_info(context)
}
/// Get the IR block for a BlockIndex, if one exists.