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Rollup merge of #94169 - Amanieu:asm_stuff, r=nagisa

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Fix several asm! related issues

This is a combination of several fixes, each split into a separate commit. Splitting these into PRs is not practical since they conflict with each other.

Fixes #92378
Fixes #85247

r? ``@nagisa``
This commit is contained in:
Matthias Krüger 2022-02-22 12:16:28 +01:00 committed by GitHub
commit a063e138b6
1 changed files with 11 additions and 9 deletions
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20
src/inline_asm.rs
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@ -106,6 +106,7 @@ pub(crate) fn codegen_inline_asm<'tcx>(
let mut asm_gen = InlineAssemblyGenerator {
tcx: fx.tcx,
arch: fx.tcx.sess.asm_arch.unwrap(),
enclosing_def_id: fx.instance.def_id(),
template,
operands,
options,
@ -169,6 +170,7 @@ pub(crate) fn codegen_inline_asm<'tcx>(
struct InlineAssemblyGenerator<'a, 'tcx> {
tcx: TyCtxt<'tcx>,
arch: InlineAsmArch,
enclosing_def_id: DefId,
template: &'a [InlineAsmTemplatePiece],
operands: &'a [InlineAsmOperand<'tcx>],
options: InlineAsmOptions,
@ -182,7 +184,12 @@ struct InlineAssemblyGenerator<'a, 'tcx> {
impl<'tcx> InlineAssemblyGenerator<'_, 'tcx> {
fn allocate_registers(&mut self) {
let sess = self.tcx.sess;
let map = allocatable_registers(self.arch, &sess.target_features, &sess.target);
let map = allocatable_registers(
self.arch,
sess.relocation_model(),
self.tcx.asm_target_features(self.enclosing_def_id),
&sess.target,
);
let mut allocated = FxHashMap::<_, (bool, bool)>::default();
let mut regs = vec![None; self.operands.len()];
@ -313,14 +320,9 @@ impl<'tcx> InlineAssemblyGenerator<'_, 'tcx> {
let mut new_slot = |x| new_slot_fn(&mut slot_size, x);
// Allocate stack slots for saving clobbered registers
let abi_clobber = InlineAsmClobberAbi::parse(
self.arch,
&self.tcx.sess.target_features,
&self.tcx.sess.target,
sym::C,
)
.unwrap()
.clobbered_regs();
let abi_clobber = InlineAsmClobberAbi::parse(self.arch, &self.tcx.sess.target, sym::C)
.unwrap()
.clobbered_regs();
for (i, reg) in self.registers.iter().enumerate().filter_map(|(i, r)| r.map(|r| (i, r))) {
let mut need_save = true;
// If the register overlaps with a register clobbered by function call, then