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</pre></div><pre class="rust"><code><span class="attr">#![allow(unused)]
</span><span class="kw">use </span>llvm_sys::{
analysis::{LLVMVerifierFailureAction, LLVMVerifyFunction},
core::{
LLVMAddIncoming, LLVMAppendExistingBasicBlock, LLVMCountBasicBlocks, LLVMCountParams,
LLVMDumpValue, LLVMGetParam, LLVMGetValueKind, LLVMGetValueName2, LLVMGlobalGetValueType,
LLVMIsAFunction, LLVMIsAPHINode, LLVMSetValueName2, LLVMTypeOf,
},
prelude::LLVMValueRef,
LLVMTypeKind, LLVMValueKind,
};
<span class="kw">use </span>std::ffi::CStr;
<span class="kw">use </span>std::marker::PhantomData;
<span class="kw">use </span>std::ops::Deref;
<span class="kw">use </span><span class="kw">super</span>::BasicBlock;
<span class="kw">use </span><span class="kw">super</span>::Type;
<span class="doccomment">/// Wrapper for a LLVM Value Reference.
</span><span class="attr">#[derive(Copy, Clone)]
#[repr(transparent)]
</span><span class="kw">pub struct </span>Value<<span class="lifetime">'llvm</span>>(LLVMValueRef, PhantomData<<span class="kw-2">&</span><span class="lifetime">'llvm </span>()>);
<span class="kw">impl</span><<span class="lifetime">'llvm</span>> Value<<span class="lifetime">'llvm</span>> {
<span class="doccomment">/// Create a new Value instance.
///
/// # Panics
///
/// Panics if `value_ref` is a null pointer.
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>new(value_ref: LLVMValueRef) -> <span class="self">Self </span>{
<span class="macro">assert!</span>(!value_ref.is_null());
Value(value_ref, PhantomData)
}
<span class="doccomment">/// Get the raw LLVM value reference.
</span><span class="attr">#[inline]
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>value_ref(<span class="kw-2">&</span><span class="self">self</span>) -> LLVMValueRef {
<span class="self">self</span>.<span class="number">0
</span>}
<span class="doccomment">/// Get the LLVM value kind for the given value reference.
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>kind(<span class="kw-2">&</span><span class="self">self</span>) -> LLVMValueKind {
<span class="kw">unsafe </span>{ LLVMGetValueKind(<span class="self">self</span>.value_ref()) }
}
<span class="doccomment">/// Check if value is `function` type.
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_function(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
<span class="kw">let </span>cast = <span class="kw">unsafe </span>{ LLVMIsAFunction(<span class="self">self</span>.value_ref()) };
!cast.is_null()
}
<span class="doccomment">/// Check if value is `phinode` type.
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>is_phinode(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
<span class="kw">let </span>cast = <span class="kw">unsafe </span>{ LLVMIsAPHINode(<span class="self">self</span>.value_ref()) };
!cast.is_null()
}
<span class="doccomment">/// Dump the LLVM Value to stdout.
</span><span class="kw">pub fn </span>dump(<span class="kw-2">&</span><span class="self">self</span>) {
<span class="kw">unsafe </span>{ LLVMDumpValue(<span class="self">self</span>.value_ref()) };
}
<span class="doccomment">/// Get a type reference representing for the given value reference.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>type_of(<span class="kw-2">&</span><span class="self">self</span>) -> Type<<span class="lifetime">'llvm</span>> {
<span class="kw">let </span>type_ref = <span class="kw">unsafe </span>{ LLVMTypeOf(<span class="self">self</span>.value_ref()) };
Type::new(type_ref)
}
<span class="doccomment">/// Set the name for the given value reference.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>set_name(<span class="kw-2">&</span><span class="self">self</span>, name: <span class="kw-2">&</span>str) {
<span class="kw">unsafe </span>{ LLVMSetValueName2(<span class="self">self</span>.value_ref(), name.as_ptr().cast(), name.len()) };
}
<span class="doccomment">/// Get the name for the given value reference.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>get_name(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'llvm </span>str {
<span class="kw">let </span>name = <span class="kw">unsafe </span>{
<span class="kw">let </span><span class="kw-2">mut </span>len: libc::size_t = <span class="number">0</span>;
<span class="kw">let </span>name = LLVMGetValueName2(<span class="self">self</span>.<span class="number">0</span>, <span class="kw-2">&mut </span>len <span class="kw">as _</span>);
<span class="macro">assert!</span>(!name.is_null());
CStr::from_ptr(name)
};
<span class="comment">// TODO: Does this string live for the time of the LLVM context?!
</span>name.to_str()
.expect(<span class="string">"Expected valid UTF8 string from LLVM API"</span>)
}
<span class="doccomment">/// Check if value is of `f64` type.
</span><span class="kw">pub fn </span>is_f64(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
<span class="self">self</span>.type_of().kind() == LLVMTypeKind::LLVMDoubleTypeKind
}
<span class="doccomment">/// Check if value is of integer type.
</span><span class="kw">pub fn </span>is_int(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
<span class="self">self</span>.type_of().kind() == LLVMTypeKind::LLVMIntegerTypeKind
}
}
<span class="doccomment">/// Wrapper for a LLVM Value Reference specialized for contexts where function values are needed.
</span><span class="attr">#[derive(Copy, Clone)]
#[repr(transparent)]
</span><span class="kw">pub struct </span>FnValue<<span class="lifetime">'llvm</span>>(Value<<span class="lifetime">'llvm</span>>);
<span class="kw">impl</span><<span class="lifetime">'llvm</span>> Deref <span class="kw">for </span>FnValue<<span class="lifetime">'llvm</span>> {
<span class="kw">type </span>Target = Value<<span class="lifetime">'llvm</span>>;
<span class="kw">fn </span>deref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="self">Self</span>::Target {
<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0
</span>}
}
<span class="kw">impl</span><<span class="lifetime">'llvm</span>> FnValue<<span class="lifetime">'llvm</span>> {
<span class="doccomment">/// Create a new FnValue instance.
///
/// # Panics
///
/// Panics if `value_ref` is a null pointer.
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>new(value_ref: LLVMValueRef) -> <span class="self">Self </span>{
<span class="kw">let </span>value = Value::new(value_ref);
<span class="macro">debug_assert!</span>(
value.is_function(),
<span class="string">"Expected a fn value when constructing FnValue!"
</span>);
FnValue(value)
}
<span class="doccomment">/// Get a type reference representing the function type (return + args) of the given function
/// value.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>fn_type(<span class="kw-2">&</span><span class="self">self</span>) -> Type<<span class="lifetime">'llvm</span>> {
<span class="comment">// https://github.com/llvm/llvm-project/issues/72798
</span><span class="kw">let </span>type_ref = <span class="kw">unsafe </span>{ LLVMGlobalGetValueType(<span class="self">self</span>.value_ref()) };
Type::new(type_ref)
}
<span class="doccomment">/// Get the number of function arguments for the given function value.
</span><span class="kw">pub fn </span>args(<span class="kw-2">&</span><span class="self">self</span>) -> usize {
<span class="kw">unsafe </span>{ LLVMCountParams(<span class="self">self</span>.value_ref()) <span class="kw">as </span>usize }
}
<span class="doccomment">/// Get a value reference for the function argument at index `idx`.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer or indexed out of bounds.
</span><span class="kw">pub fn </span>arg(<span class="kw-2">&</span><span class="self">self</span>, idx: usize) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">assert!</span>(idx < <span class="self">self</span>.args());
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{ LLVMGetParam(<span class="self">self</span>.value_ref(), idx <span class="kw">as </span>libc::c_uint) };
Value::new(value_ref)
}
<span class="doccomment">/// Get the number of Basic Blocks for the given function value.
</span><span class="kw">pub fn </span>basic_blocks(<span class="kw-2">&</span><span class="self">self</span>) -> usize {
<span class="kw">unsafe </span>{ LLVMCountBasicBlocks(<span class="self">self</span>.value_ref()) <span class="kw">as </span>usize }
}
<span class="doccomment">/// Append a Basic Block to the end of the function value.
</span><span class="kw">pub fn </span>append_basic_block(<span class="kw-2">&</span><span class="self">self</span>, bb: BasicBlock<<span class="lifetime">'llvm</span>>) {
<span class="kw">unsafe </span>{
LLVMAppendExistingBasicBlock(<span class="self">self</span>.value_ref(), bb.bb_ref());
}
}
<span class="doccomment">/// Verify that the given function is valid.
</span><span class="kw">pub fn </span>verify(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
<span class="kw">unsafe </span>{
LLVMVerifyFunction(
<span class="self">self</span>.value_ref(),
LLVMVerifierFailureAction::LLVMPrintMessageAction,
) == <span class="number">0
</span>}
}
}
<span class="doccomment">/// Wrapper for a LLVM Value Reference specialized for contexts where phi values are needed.
</span><span class="attr">#[derive(Copy, Clone)]
#[repr(transparent)]
</span><span class="kw">pub struct </span>PhiValue<<span class="lifetime">'llvm</span>>(Value<<span class="lifetime">'llvm</span>>);
<span class="kw">impl</span><<span class="lifetime">'llvm</span>> Deref <span class="kw">for </span>PhiValue<<span class="lifetime">'llvm</span>> {
<span class="kw">type </span>Target = Value<<span class="lifetime">'llvm</span>>;
<span class="kw">fn </span>deref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="self">Self</span>::Target {
<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0
</span>}
}
<span class="kw">impl</span><<span class="lifetime">'llvm</span>> PhiValue<<span class="lifetime">'llvm</span>> {
<span class="doccomment">/// Create a new PhiValue instance.
///
/// # Panics
///
/// Panics if `value_ref` is a null pointer.
</span><span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">fn </span>new(value_ref: LLVMValueRef) -> <span class="self">Self </span>{
<span class="kw">let </span>value = Value::new(value_ref);
<span class="macro">debug_assert!</span>(
value.is_phinode(),
<span class="string">"Expected a phinode value when constructing PhiValue!"
</span>);
PhiValue(value)
}
<span class="doccomment">/// Add an incoming value to the end of a PHI list.
</span><span class="kw">pub fn </span>add_incoming(<span class="kw-2">&</span><span class="self">self</span>, ival: Value<<span class="lifetime">'llvm</span>>, ibb: BasicBlock<<span class="lifetime">'llvm</span>>) {
<span class="macro">debug_assert_eq!</span>(
ival.type_of().kind(),
<span class="self">self</span>.type_of().kind(),
<span class="string">"Type of incoming phi value must be the same as the type used to build the phi node."
</span>);
<span class="kw">unsafe </span>{
LLVMAddIncoming(
<span class="self">self</span>.value_ref(),
<span class="kw-2">&mut </span>ival.value_ref() <span class="kw">as _</span>,
<span class="kw-2">&mut </span>ibb.bb_ref() <span class="kw">as _</span>,
<span class="number">1</span>,
);
}
}
}
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