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ISLE: emit traps as safepoints on x64

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This commit is contained in:
Nick Fitzgerald
2022-02-07 10:01:23 -08:00
parent 31e2d6b21c
commit bb7ae46ecd
4 changed files with 11 additions and 7 deletions
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4
cranelift/codegen/src/isa/x64/lower.isle
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@@ -1461,9 +1461,9 @@
;;;; Rules for `trap` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(rule (lower (trap code))
(value_regs_none (ud2 code)))
(safepoint (ud2 code)))
;;;; Rules for `resumable_trap` ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(rule (lower (resumable_trap code))
(value_regs_none (ud2 code)))
(safepoint (ud2 code)))

8
cranelift/codegen/src/isa/x64/lower/isle.rs
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@@ -233,8 +233,12 @@ where
}
}
fn emit_safepoint(&mut self, _inst: &MInst) -> Unit {
unimplemented!();
fn emit_safepoint(&mut self, inst: &MInst) -> Unit {
use crate::machinst::MachInst;
for inst in inst.clone().mov_mitosis() {
let is_safepoint = !inst.is_move().is_some();
self.emitted_insts.push((inst, is_safepoint));
}
}
#[inline]

2
cranelift/codegen/src/isa/x64/lower/isle/generated_code.manifest
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@@ -1,4 +1,4 @@
src/clif.isle 9ea75a6f790b5c03
src/prelude.isle 6aaf8ce0f5a5c2ec
src/isa/x64/inst.isle 7513533d16948249
src/isa/x64/lower.isle ccda13e9fe83c89a
src/isa/x64/lower.isle 976ac116c5fcfa16

4
cranelift/codegen/src/isa/x64/lower/isle/generated_code.rs generated
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@@ -2993,13 +2993,13 @@ pub fn constructor_lower<C: Context>(ctx: &mut C, arg0: Inst) -> Option<ValueReg
&Opcode::Trap => {
// Rule at src/isa/x64/lower.isle line 1463.
let expr0_0 = constructor_ud2(ctx, &pattern2_1)?;
let expr1_0 = constructor_value_regs_none(ctx, &expr0_0)?;
let expr1_0 = constructor_safepoint(ctx, &expr0_0)?;
return Some(expr1_0);
}
&Opcode::ResumableTrap => {
// Rule at src/isa/x64/lower.isle line 1468.
let expr0_0 = constructor_ud2(ctx, &pattern2_1)?;
let expr1_0 = constructor_value_regs_none(ctx, &expr0_0)?;
let expr1_0 = constructor_safepoint(ctx, &expr0_0)?;
return Some(expr1_0);
}
_ => {}