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Add explicit OptLevel to add_passes

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This commit is contained in:
Richard Feldman 2020-04-16 20:26:08 -04:00
parent b19386c1f6
commit ea713023e8
2 changed files with 48 additions and 24 deletions
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49
compiler/gen/src/llvm/build.rs
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@ -31,6 +31,11 @@ const PRINT_FN_VERIFICATION_OUTPUT: bool = false;
// TODO: experiment with different internal calling conventions, e.g. "fast"
const DEFAULT_CALLING_CONVENTION: u32 = 0;
pub enum OptLevel {
Normal,
Optimize,
}
type Scope<'a, 'ctx> = ImMap<Symbol, (Layout<'a>, PointerValue<'ctx>)>;
pub struct Env<'a, 'ctx, 'env> {
@ -56,7 +61,7 @@ pub fn module_from_builtins<'ctx>(ctx: &'ctx Context, module_name: &str) -> Modu
.unwrap_or_else(|err| panic!("Unable to import builtins bitcode. LLVM error: {:?}", err))
}
pub fn add_passes(fpm: &PassManager<FunctionValue<'_>>) {
pub fn add_passes(fpm: &PassManager<FunctionValue<'_>>, opt_level: OptLevel) {
// tail-call elimination is always on
fpm.add_instruction_combining_pass();
fpm.add_tail_call_elimination_pass();
@ -64,28 +69,32 @@ pub fn add_passes(fpm: &PassManager<FunctionValue<'_>>) {
let pmb = PassManagerBuilder::create();
// Enable more optimizations when running cargo test --release
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);
match opt_level {
OptLevel::Normal => {
pmb.set_optimization_level(OptimizationLevel::None);
}
OptLevel::Optimize => {
// 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.
// 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);
// 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);
}