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Simplify FunctionCx::create_stack_slot a bit

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This commit is contained in:
bjorn3 2023-10-22 18:10:59 +00:00
parent 55380a5ffd
commit 56c6c86661
1 changed files with 1 additions and 7 deletions
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8
src/common.rs
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@ -395,13 +395,7 @@ impl<'tcx> FunctionCx<'_, '_, 'tcx> {
} else {
// Alignment is too big to handle using the above hack. Dynamically realign a stack slot
// instead. This wastes some space for the realignment.
let stack_slot = self.bcx.create_sized_stack_slot(StackSlotData {
kind: StackSlotKind::ExplicitSlot,
// FIXME is this calculation to ensure there is enough space to dyanmically realign
// as well as keep a 16 byte realignment for the other stack slots correct?
size: ((size + align - 1) + 16) / 16 * 16,
});
let base_ptr = self.bcx.ins().stack_addr(self.pointer_type, stack_slot, 0);
let base_ptr = self.create_stack_slot(size + align, 16).get_addr(self);
let misalign_offset = self.bcx.ins().urem_imm(base_ptr, i64::from(align));
let realign_offset = self.bcx.ins().irsub_imm(misalign_offset, i64::from(align));
Pointer::new(self.bcx.ins().iadd(base_ptr, realign_offset))