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Baldrdash: callee-saved are only JIT callee-saved, not "JIT or natives".

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And don't mark SP as callee-preserved (it's implicitly preserved);
This commit is contained in:
Benjamin Bouvier
2020-04-09 14:43:32 +02:00
parent 9364eb1d98
commit 359dc76ae4
1 changed files with 3 additions and 9 deletions
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12
cranelift/codegen/src/isa/aarch64/abi.rs
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@@ -58,7 +58,7 @@ static BALDRDASH_JIT_CALLEE_SAVED_GPR: &[bool] = &[
/* 24 = */ false, false, false, false,
// There should be 28, the pseudo stack pointer in this list, however the wasm stubs trash it
// gladly right now.
/* 28 = */ false, false, true /* x30 = FP */, true /* x31 = SP */
/* 28 = */ false, false, true /* x30 = FP */, false /* x31 = SP */
];
#[rustfmt::skip]
@@ -314,17 +314,11 @@ fn is_callee_save(call_conv: isa::CallConv, r: RealReg) -> bool {
match r.get_class() {
RegClass::I64 => {
let enc = r.get_hw_encoding();
if BALDRDASH_JIT_CALLEE_SAVED_GPR[enc] {
return true;
}
// Otherwise, fall through to preserve native ABI registers.
return BALDRDASH_JIT_CALLEE_SAVED_GPR[enc];
}
RegClass::V128 => {
let enc = r.get_hw_encoding();
if BALDRDASH_JIT_CALLEE_SAVED_FPU[enc] {
return true;
}
// Otherwise, fall through to preserve native ABI registers.
return BALDRDASH_JIT_CALLEE_SAVED_FPU[enc];
}
_ => unimplemented!("baldrdash callee saved on non-i64 reg classes"),
};