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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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11
cranelift/codegen/src/isa/s390x/inst/mod.rs
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@@ -144,6 +144,7 @@ impl Inst {
| Inst::StoreMultiple64 { .. }
| Inst::Mov32 { .. }
| Inst::Mov64 { .. }
| Inst::MovPReg { .. }
| Inst::Mov32Imm { .. }
| Inst::Mov32SImm16 { .. }
| Inst::Mov64SImm16 { .. }
@@ -623,6 +624,11 @@ fn s390x_get_operands<F: Fn(VReg) -> VReg>(inst: &Inst, collector: &mut OperandC
collector.reg_def(rd);
collector.reg_use(rm);
}
&Inst::MovPReg { rd, rm } => {
debug_assert!([regs::gpr(14), regs::gpr(15)].contains(&rm.into()));
debug_assert!(rd.to_reg().is_virtual());
collector.reg_def(rd);
}
&Inst::Mov32 { rd, rm } => {
collector.reg_def(rd);
collector.reg_use(rm);
@@ -1778,6 +1784,11 @@ impl Inst {
let rm = pretty_print_reg(rm, allocs);
format!("lgr {}, {}", rd, rm)
}
&Inst::MovPReg { rd, rm } => {
let rd = pretty_print_reg(rd.to_reg(), allocs);
let rm = show_reg(rm.into());
format!("lgr {}, {}", rd, rm)
}
&Inst::Mov32 { rd, rm } => {
let rd = pretty_print_reg(rd.to_reg(), allocs);
let rm = pretty_print_reg(rm, allocs);