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A mish-mash of micro-optimizations #113116

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merged 9 commits into from
Jun 30, 2023
Merged

A mish-mash of micro-optimizations #113116

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a13be65
Avoid unnecessary line lookup.
nnethercote Jun 27, 2023
b4c6e19
Replace a `lookup_debug_loc` call.
nnethercote Jun 27, 2023
45fcd1d
Use `partition_point` in `SourceMap::lookup_source_file_idx`.
nnethercote Jun 28, 2023
de1914a
Avoid an unnecessary use of `SmallStr`.
nnethercote Jun 28, 2023
f2d863f
Remove `SmallStr`.
nnethercote Jun 29, 2023
d20b1a8
Set capacity of the string passed to `push_item_name`.
nnethercote Jun 28, 2023
81436eb
Use `SmallVec` for the `bundles` vectors.
nnethercote Jun 28, 2023
8d7084d
Simplify the `bundles` vectors.
nnethercote Jun 28, 2023
7e786e8
Avoid cloning `LocalDecls`.
nnethercote Jun 28, 2023
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21 changes: 15 additions & 6 deletions compiler/rustc_codegen_llvm/src/builder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ use rustc_span::Span;
use rustc_symbol_mangling::typeid::{kcfi_typeid_for_fnabi, typeid_for_fnabi, TypeIdOptions};
use rustc_target::abi::{self, call::FnAbi, Align, Size, WrappingRange};
use rustc_target::spec::{HasTargetSpec, SanitizerSet, Target};
use smallvec::SmallVec;
use std::borrow::Cow;
use std::iter;
use std::ops::Deref;
Expand Down Expand Up @@ -225,17 +226,21 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
let args = self.check_call("invoke", llty, llfn, args);
let funclet_bundle = funclet.map(|funclet| funclet.bundle());
let funclet_bundle = funclet_bundle.as_ref().map(|b| &*b.raw);
let mut bundles = vec![funclet_bundle];
let mut bundles: SmallVec<[_; 2]> = SmallVec::new();
if funclet_bundle.is_some() {
bundles.push(funclet_bundle);
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}

// Emit CFI pointer type membership test
self.cfi_type_test(fn_attrs, fn_abi, llfn);

// Emit KCFI operand bundle
let kcfi_bundle = self.kcfi_operand_bundle(fn_attrs, fn_abi, llfn);
let kcfi_bundle = kcfi_bundle.as_ref().map(|b| &*b.raw);
bundles.push(kcfi_bundle);
if kcfi_bundle.is_some() {
bundles.push(kcfi_bundle);
}

bundles.retain(|bundle| bundle.is_some());
let invoke = unsafe {
llvm::LLVMRustBuildInvoke(
self.llbuilder,
Expand Down Expand Up @@ -1189,17 +1194,21 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
let args = self.check_call("call", llty, llfn, args);
let funclet_bundle = funclet.map(|funclet| funclet.bundle());
let funclet_bundle = funclet_bundle.as_ref().map(|b| &*b.raw);
let mut bundles = vec![funclet_bundle];
let mut bundles: SmallVec<[_; 2]> = SmallVec::new();
if funclet_bundle.is_some() {
bundles.push(funclet_bundle);
}

// Emit CFI pointer type membership test
self.cfi_type_test(fn_attrs, fn_abi, llfn);

// Emit KCFI operand bundle
let kcfi_bundle = self.kcfi_operand_bundle(fn_attrs, fn_abi, llfn);
let kcfi_bundle = kcfi_bundle.as_ref().map(|b| &*b.raw);
bundles.push(kcfi_bundle);
if kcfi_bundle.is_some() {
bundles.push(kcfi_bundle);
}

bundles.retain(|bundle| bundle.is_some());
let call = unsafe {
llvm::LLVMRustBuildCall(
self.llbuilder,
Expand Down