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Cranelift: Add instructions for getting the current stack/frame/return pointers (#4573)

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* Cranelift: Add instructions for getting the current stack/frame pointers and return address

This is the initial part of https://github.com/bytecodealliance/wasmtime/issues/4535

* x64: Remove `Amode::RbpOffset` and use `Amode::ImmReg` instead

We just special case getting operands from `Amode`s now.

* Fix s390x `get_return_address`; require `preserve_frame_pointers=true`

* Assert that `Amode::ImmRegRegShift` doesn't use rbp/rsp

* Handle non-allocatable registers in Amode::with_allocs

* Use "stack" instead of "r15" on s390x

* r14 is an allocatable register on s390x, so it shouldn't be used with `MovPReg`
This commit is contained in:
Nick Fitzgerald
2022-08-02 14:37:17 -07:00
committed by GitHub
parent 6b4e6523f7
commit 42bba452a6
28 changed files with 484 additions and 24 deletions
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12
cranelift/codegen/src/isa/aarch64/inst/mod.rs
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@@ -649,6 +649,13 @@ fn aarch64_get_operands<F: Fn(VReg) -> VReg>(inst: &Inst, collector: &mut Operan
collector.reg_def(rd);
collector.reg_use(rm);
}
&Inst::MovPReg { rd, rm } => {
debug_assert!(
[regs::fp_reg(), regs::stack_reg(), regs::link_reg()].contains(&rm.into())
);
debug_assert!(rd.to_reg().is_virtual());
collector.reg_def(rd);
}
&Inst::MovWide { op, rd, .. } => match op {
MoveWideOp::MovK => collector.reg_mod(rd),
_ => collector.reg_def(rd),
@@ -1474,6 +1481,11 @@ impl Inst {
let rm = pretty_print_ireg(rm, size, allocs);
format!("mov {}, {}", rd, rm)
}
&Inst::MovPReg { rd, rm } => {
let rd = pretty_print_ireg(rd.to_reg(), OperandSize::Size64, allocs);
let rm = show_ireg_sized(rm.into(), OperandSize::Size64);
format!("mov {}, {}", rd, rm)
}
&Inst::MovWide {
op,
rd,