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Use the equivalent of -O3 in Inkwell

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This commit is contained in:
Richard Feldman 2020-04-16 19:25:27 -04:00
parent 1c1fee7e31
commit 2a03a74135
1 changed files with 22 additions and 8 deletions
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30
compiler/gen/src/llvm/build.rs
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@ -4,11 +4,11 @@ use inkwell::builder::Builder;
use inkwell::context::Context;
use inkwell::memory_buffer::MemoryBuffer;
use inkwell::module::{Linkage, Module};
use inkwell::passes::PassManager;
use inkwell::passes::{PassManager, PassManagerBuilder};
use inkwell::types::{BasicTypeEnum, IntType, StructType};
use inkwell::values::BasicValueEnum::{self, *};
use inkwell::values::{FunctionValue, IntValue, PointerValue, StructValue};
use inkwell::{FloatPredicate, IntPredicate};
use inkwell::{FloatPredicate, IntPredicate, OptimizationLevel};
use crate::llvm::convert::{
basic_type_from_layout, collection_wrapper, empty_collection, get_fn_type, ptr_int,
@ -61,18 +61,32 @@ pub fn add_passes(fpm: &PassManager<FunctionValue<'_>>) {
fpm.add_instruction_combining_pass();
fpm.add_tail_call_elimination_pass();
let pmb = PassManagerBuilder::create();
// Enable more optimizations when running cargo test --release
if !cfg!(debug_assertions) {
fpm.add_reassociate_pass();
fpm.add_basic_alias_analysis_pass();
fpm.add_promote_memory_to_register_pass();
fpm.add_cfg_simplification_pass();
fpm.add_gvn_pass();
if cfg!(debug_assertions) {
pmb.set_optimization_level(OptimizationLevel::None);
} else {
// Default is O2, Aggressive is O3
//
// See https://llvm.org/doxygen/CodeGen_8h_source.html
pmb.set_optimization_level(OptimizationLevel::Aggressive);
// TODO figure out how enabling these individually differs from
// the broad "aggressive optimizations" setting.
// fpm.add_reassociate_pass();
// fpm.add_basic_alias_analysis_pass();
// fpm.add_promote_memory_to_register_pass();
// fpm.add_cfg_simplification_pass();
// fpm.add_gvn_pass();
// TODO figure out why enabling any of these (even alone) causes LLVM to segfault
// fpm.add_strip_dead_prototypes_pass();
// fpm.add_dead_arg_elimination_pass();
// fpm.add_function_inlining_pass();
// pmb.set_inliner_with_threshold(4);
}
pmb.populate_function_pass_manager(&fpm);
}
#[allow(clippy::cognitive_complexity)]