bjoernager/rust
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Merge commit '557ed8ebb7' into sync_cg_clif-2025-02-15

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bjorn3 2025-02-15 14:13:01 +00:00
commit 7a6206e9c4
9 changed files with 20 additions and 13 deletions
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7
compiler/rustc_codegen_cranelift/src/common.rs
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@ -382,6 +382,11 @@ impl<'tcx> FunctionCx<'_, '_, 'tcx> {
}
pub(crate) fn create_stack_slot(&mut self, size: u32, align: u32) -> Pointer {
assert!(
size % align == 0,
"size must be a multiple of alignment (size={size}, align={align})"
);
let abi_align = if self.tcx.sess.target.arch == "s390x" { 8 } else { 16 };
if align <= abi_align {
let stack_slot = self.bcx.create_sized_stack_slot(StackSlotData {
@ -403,7 +408,7 @@ impl<'tcx> FunctionCx<'_, '_, 'tcx> {
align_shift: 4,
});
let base_ptr = self.bcx.ins().stack_addr(self.pointer_type, stack_slot, 0);
let misalign_offset = self.bcx.ins().urem_imm(base_ptr, i64::from(align));
let misalign_offset = self.bcx.ins().band_imm(base_ptr, i64::from(align - 1));
let realign_offset = self.bcx.ins().irsub_imm(misalign_offset, i64::from(align));
Pointer::new(self.bcx.ins().iadd(base_ptr, realign_offset))
}