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core: add llvm.lifetime.{start.end}

This commit is contained in:
lyken 2024-07-12 13:18:09 +08:00
parent 9ad7a78dbe
commit c4d54b198b
1 changed files with 48 additions and 0 deletions
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48
nac3core/src/codegen/llvm_intrinsics.rs
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@ -35,6 +35,54 @@ fn get_float_intrinsic_repr(ctx: &Context, ft: FloatType) -> &'static str {
unreachable!()
}
/// Invokes the [`llvm.lifetime.start`](https://releases.llvm.org/14.0.0/docs/LangRef.html#llvm-lifetime-start-intrinsic)
/// intrinsic.
pub fn call_lifetime_start<'ctx>(
ctx: &CodeGenContext<'ctx, '_>,
size: IntValue<'ctx>,
ptr: PointerValue<'ctx>,
) {
const FN_NAME: &str = "llvm.lifetime.start";
// NOTE: inkwell temporary workaround, see [`call_stackrestore`] for details
let intrinsic_fn = ctx.module.get_function(FN_NAME).unwrap_or_else(|| {
let llvm_void = ctx.ctx.void_type();
let llvm_i64 = ctx.ctx.i64_type();
let llvm_p0i8 = ctx.ctx.i8_type().ptr_type(AddressSpace::default());
let fn_type = llvm_void.fn_type(&[llvm_i64.into(), llvm_p0i8.into()], false);
ctx.module.add_function(FN_NAME, fn_type, None)
});
ctx.builder
.build_call(intrinsic_fn, &[size.into(), ptr.into()], "")
.map(CallSiteValue::try_as_basic_value)
.unwrap();
}
/// Invokes the [`llvm.lifetime.end`](https://releases.llvm.org/14.0.0/docs/LangRef.html#llvm-lifetime-end-intrinsic)
/// intrinsic.
pub fn call_lifetime_end<'ctx>(
ctx: &CodeGenContext<'ctx, '_>,
size: IntValue<'ctx>,
ptr: PointerValue<'ctx>,
) {
const FN_NAME: &str = "llvm.lifetime.end";
// NOTE: inkwell temporary workaround, see [`call_stackrestore`] for details
let intrinsic_fn = ctx.module.get_function(FN_NAME).unwrap_or_else(|| {
let llvm_void = ctx.ctx.void_type();
let llvm_i64 = ctx.ctx.i64_type();
let llvm_p0i8 = ctx.ctx.i8_type().ptr_type(AddressSpace::default());
let fn_type = llvm_void.fn_type(&[llvm_i64.into(), llvm_p0i8.into()], false);
ctx.module.add_function(FN_NAME, fn_type, None)
});
ctx.builder
.build_call(intrinsic_fn, &[size.into(), ptr.into()], "")
.map(CallSiteValue::try_as_basic_value)
.unwrap();
}
/// Invokes the [`llvm.stacksave`](https://llvm.org/docs/LangRef.html#llvm-stacksave-intrinsic)
/// intrinsic.
pub fn call_stacksave<'ctx>(