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round pointer to alignment without going via int

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Folkert de Vries 2025-07-27 23:05:22 +02:00
parent 1bc901e0ca
commit 002751155d
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GPG key ID: 1F17F6FFD112B97C
1 changed files with 6 additions and 3 deletions
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9
compiler/rustc_codegen_llvm/src/va_arg.rs
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@ -28,9 +28,12 @@ fn round_pointer_up_to_alignment<'ll>(
align: Align,
ptr_ty: &'ll Type,
) -> &'ll Value {
let mut ptr_as_int = bx.ptrtoint(addr, bx.cx().type_isize());
ptr_as_int = round_up_to_alignment(bx, ptr_as_int, align);
bx.inttoptr(ptr_as_int, ptr_ty)
let ptr = bx.inbounds_ptradd(addr, bx.const_i32(align.bytes() as i32 - 1));
bx.call_intrinsic(
"llvm.ptrmask",
&[ptr_ty, bx.type_i32()],
&[ptr, bx.const_int(bx.isize_ty, -(align.bytes() as isize) as i64)],
)
}
fn emit_direct_ptr_va_arg<'ll, 'tcx>(