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</pre></div><pre class="rust"><code><span class="kw">use </span>llvm_sys::{
core::{
LLVMAddIncoming, LLVMBuildBr, LLVMBuildCondBr, LLVMBuildFAdd, LLVMBuildFCmp, LLVMBuildFMul,
LLVMBuildFSub, LLVMBuildPhi, LLVMBuildRet, LLVMBuildUIToFP, LLVMCreateBuilderInContext,
LLVMDisposeBuilder, LLVMGetInsertBlock, LLVMPositionBuilderAtEnd,
},
prelude::{LLVMBuilderRef, LLVMValueRef},
LLVMRealPredicate,
};
<span class="kw">use </span>std::marker::PhantomData;
<span class="kw">use super</span>::{BasicBlock, FnValue, Module, PhiValue, Type, Value};
<span class="comment">// Definition of LLVM C API functions using our `repr(transparent)` types.
</span><span class="kw">extern </span><span class="string">"C" </span>{
<span class="kw">fn </span>LLVMBuildCall2(
arg1: LLVMBuilderRef,
arg2: Type<<span class="lifetime">'_</span>>,
Fn: FnValue<<span class="lifetime">'_</span>>,
Args: <span class="kw-2">*mut </span>Value<<span class="lifetime">'_</span>>,
NumArgs: ::libc::c_uint,
Name: <span class="kw-2">*const </span>::libc::c_char,
) -> LLVMValueRef;
}
<span class="doccomment">/// Wrapper for a LLVM IR Builder.
</span><span class="kw">pub struct </span>IRBuilder<<span class="lifetime">'llvm</span>> {
builder: LLVMBuilderRef,
_ctx: PhantomData<<span class="kw-2">&</span><span class="lifetime">'llvm </span>()>,
}
<span class="kw">impl</span><<span class="lifetime">'llvm</span>> IRBuilder<<span class="lifetime">'llvm</span>> {
<span class="doccomment">/// Create a new LLVM IR Builder with the `module`s context.
///
/// # Panics
///
/// Panics if creating the IR Builder fails.
</span><span class="kw">pub fn </span>with_ctx(module: <span class="kw-2">&</span><span class="lifetime">'llvm </span>Module) -> IRBuilder<<span class="lifetime">'llvm</span>> {
<span class="kw">let </span>builder = <span class="kw">unsafe </span>{ LLVMCreateBuilderInContext(module.ctx()) };
<span class="macro">assert!</span>(!builder.is_null());
IRBuilder {
builder,
_ctx: PhantomData,
}
}
<span class="doccomment">/// Position the IR Builder at the end of the given Basic Block.
</span><span class="kw">pub fn </span>pos_at_end(<span class="kw-2">&</span><span class="self">self</span>, bb: BasicBlock<<span class="lifetime">'llvm</span>>) {
<span class="kw">unsafe </span>{
LLVMPositionBuilderAtEnd(<span class="self">self</span>.builder, bb.bb_ref());
}
}
<span class="doccomment">/// Get the BasicBlock the IRBuilder currently inputs into.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>get_insert_block(<span class="kw-2">&</span><span class="self">self</span>) -> BasicBlock<<span class="lifetime">'llvm</span>> {
<span class="kw">let </span>bb_ref = <span class="kw">unsafe </span>{ LLVMGetInsertBlock(<span class="self">self</span>.builder) };
<span class="macro">assert!</span>(!bb_ref.is_null());
BasicBlock::new(bb_ref)
}
<span class="doccomment">/// Emit a [fadd](https://llvm.org/docs/LangRef.html#fadd-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>fadd(<span class="kw-2">&</span><span class="self">self</span>, lhs: Value<<span class="lifetime">'llvm</span>>, rhs: Value<<span class="lifetime">'llvm</span>>) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">debug_assert!</span>(lhs.is_f64(), <span class="string">"fadd: Expected f64 as lhs operand!"</span>);
<span class="macro">debug_assert!</span>(rhs.is_f64(), <span class="string">"fadd: Expected f64 as rhs operand!"</span>);
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildFAdd(
<span class="self">self</span>.builder,
lhs.value_ref(),
rhs.value_ref(),
<span class="string">b"fadd\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [fsub](https://llvm.org/docs/LangRef.html#fsub-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>fsub(<span class="kw-2">&</span><span class="self">self</span>, lhs: Value<<span class="lifetime">'llvm</span>>, rhs: Value<<span class="lifetime">'llvm</span>>) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">debug_assert!</span>(lhs.is_f64(), <span class="string">"fsub: Expected f64 as lhs operand!"</span>);
<span class="macro">debug_assert!</span>(rhs.is_f64(), <span class="string">"fsub: Expected f64 as rhs operand!"</span>);
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildFSub(
<span class="self">self</span>.builder,
lhs.value_ref(),
rhs.value_ref(),
<span class="string">b"fsub\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [fmul](https://llvm.org/docs/LangRef.html#fmul-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>fmul(<span class="kw-2">&</span><span class="self">self</span>, lhs: Value<<span class="lifetime">'llvm</span>>, rhs: Value<<span class="lifetime">'llvm</span>>) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">debug_assert!</span>(lhs.is_f64(), <span class="string">"fmul: Expected f64 as lhs operand!"</span>);
<span class="macro">debug_assert!</span>(rhs.is_f64(), <span class="string">"fmul: Expected f64 as rhs operand!"</span>);
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildFMul(
<span class="self">self</span>.builder,
lhs.value_ref(),
rhs.value_ref(),
<span class="string">b"fmul\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [fcmpult](https://llvm.org/docs/LangRef.html#fcmp-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>fcmpult(<span class="kw-2">&</span><span class="self">self</span>, lhs: Value<<span class="lifetime">'llvm</span>>, rhs: Value<<span class="lifetime">'llvm</span>>) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">debug_assert!</span>(lhs.is_f64(), <span class="string">"fcmpult: Expected f64 as lhs operand!"</span>);
<span class="macro">debug_assert!</span>(rhs.is_f64(), <span class="string">"fcmpult: Expected f64 as rhs operand!"</span>);
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildFCmp(
<span class="self">self</span>.builder,
LLVMRealPredicate::LLVMRealULT,
lhs.value_ref(),
rhs.value_ref(),
<span class="string">b"fcmpult\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [fcmpone](https://llvm.org/docs/LangRef.html#fcmp-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>fcmpone(<span class="kw-2">&</span><span class="self">self</span>, lhs: Value<<span class="lifetime">'llvm</span>>, rhs: Value<<span class="lifetime">'llvm</span>>) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">debug_assert!</span>(lhs.is_f64(), <span class="string">"fcmone: Expected f64 as lhs operand!"</span>);
<span class="macro">debug_assert!</span>(rhs.is_f64(), <span class="string">"fcmone: Expected f64 as rhs operand!"</span>);
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildFCmp(
<span class="self">self</span>.builder,
LLVMRealPredicate::LLVMRealONE,
lhs.value_ref(),
rhs.value_ref(),
<span class="string">b"fcmpone\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [uitofp](https://llvm.org/docs/LangRef.html#uitofp-to-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>uitofp(<span class="kw-2">&</span><span class="self">self</span>, val: Value<<span class="lifetime">'llvm</span>>, dest_type: Type<<span class="lifetime">'llvm</span>>) -> Value<<span class="lifetime">'llvm</span>> {
<span class="macro">debug_assert!</span>(val.is_int(), <span class="string">"uitofp: Expected integer operand!"</span>);
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildUIToFP(
<span class="self">self</span>.builder,
val.value_ref(),
dest_type.type_ref(),
<span class="string">b"uitofp\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [call](https://llvm.org/docs/LangRef.html#call-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>call(<span class="kw-2">&</span><span class="self">self</span>, fn_value: FnValue<<span class="lifetime">'llvm</span>>, args: <span class="kw-2">&mut </span>[Value<<span class="lifetime">'llvm</span>>]) -> Value<<span class="lifetime">'llvm</span>> {
<span class="kw">let </span>value_ref = <span class="kw">unsafe </span>{
LLVMBuildCall2(
<span class="self">self</span>.builder,
fn_value.fn_type(),
fn_value,
args.as_mut_ptr(),
args.len() <span class="kw">as </span>libc::c_uint,
<span class="string">b"call\0"</span>.as_ptr().cast(),
)
};
Value::new(value_ref)
}
<span class="doccomment">/// Emit a [ret](https://llvm.org/docs/LangRef.html#ret-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>ret(<span class="kw-2">&</span><span class="self">self</span>, ret: Value<<span class="lifetime">'llvm</span>>) {
<span class="kw">let </span>ret = <span class="kw">unsafe </span>{ LLVMBuildRet(<span class="self">self</span>.builder, ret.value_ref()) };
<span class="macro">assert!</span>(!ret.is_null());
}
<span class="doccomment">/// Emit an unconditional [br](https://llvm.org/docs/LangRef.html#br-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>br(<span class="kw-2">&</span><span class="self">self</span>, dest: BasicBlock<<span class="lifetime">'llvm</span>>) {
<span class="kw">let </span>br_ref = <span class="kw">unsafe </span>{ LLVMBuildBr(<span class="self">self</span>.builder, dest.bb_ref()) };
<span class="macro">assert!</span>(!br_ref.is_null());
}
<span class="doccomment">/// Emit a conditional [br](https://llvm.org/docs/LangRef.html#br-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>cond_br(<span class="kw-2">&</span><span class="self">self</span>, cond: Value<<span class="lifetime">'llvm</span>>, then: BasicBlock<<span class="lifetime">'llvm</span>>, else_: BasicBlock<<span class="lifetime">'llvm</span>>) {
<span class="kw">let </span>br_ref = <span class="kw">unsafe </span>{
LLVMBuildCondBr(
<span class="self">self</span>.builder,
cond.value_ref(),
then.bb_ref(),
else_.bb_ref(),
)
};
<span class="macro">assert!</span>(!br_ref.is_null());
}
<span class="doccomment">/// Emit a [phi](https://llvm.org/docs/LangRef.html#phi-instruction) instruction.
///
/// # Panics
///
/// Panics if LLVM API returns a `null` pointer.
</span><span class="kw">pub fn </span>phi(
<span class="kw-2">&</span><span class="self">self</span>,
phi_type: Type<<span class="lifetime">'llvm</span>>,
incoming: <span class="kw-2">&</span>[(Value<<span class="lifetime">'llvm</span>>, BasicBlock<<span class="lifetime">'llvm</span>>)],
) -> PhiValue<<span class="lifetime">'llvm</span>> {
<span class="kw">let </span>phi_ref =
<span class="kw">unsafe </span>{ LLVMBuildPhi(<span class="self">self</span>.builder, phi_type.type_ref(), <span class="string">b"phi\0"</span>.as_ptr().cast()) };
<span class="macro">assert!</span>(!phi_ref.is_null());
<span class="kw">for </span>(val, bb) <span class="kw">in </span>incoming {
<span class="macro">debug_assert_eq!</span>(
val.type_of().kind(),
phi_type.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(phi_ref, <span class="kw-2">&mut </span>val.value_ref() <span class="kw">as _</span>, <span class="kw-2">&mut </span>bb.bb_ref() <span class="kw">as _</span>, <span class="number">1</span>);
}
}
PhiValue::new(phi_ref)
}
}
<span class="kw">impl </span>Drop <span class="kw">for </span>IRBuilder<<span class="lifetime">'_</span>> {
<span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) {
<span class="kw">unsafe </span>{ LLVMDisposeBuilder(<span class="self">self</span>.builder) }
}
}
</code></pre></div></section></main></body></html>
