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llvm new-pm: Build O0 pipeline in the correct way

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Use `PassBuilder::buildO0DefaultPipeline` to build pipeline for -O0
in replacement of `PassBuilder::buildPerModuleDefaultPipeline`. This
affects both normal and LTO settings.

Two redundant Passes - which were added by accident - were also removed
from LTO pipeline.
This commit is contained in:
Min-Yih Hsu 2021-04-09 13:00:46 -07:00
parent 6b3eaa62e8
commit 52d871844c
1 changed files with 5 additions and 12 deletions
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17
src/zig_llvm.cpp
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@ -277,15 +277,8 @@ bool ZigLLVMTargetMachineEmitToFile(LLVMTargetMachineRef targ_machine_ref, LLVMM
});
}
// Passes for either debug or release build
if (is_debug) {
// NOTE: Always inliner will go away (in debug build)
// when the self-hosted compiler becomes mature.
pass_builder.registerPipelineStartEPCallback(
[](ModulePassManager &module_pm, OptimizationLevel OL) {
module_pm.addPass(AlwaysInlinerPass());
});
} else {
// Passes specific for release build
if (!is_debug) {
pass_builder.registerPipelineStartEPCallback(
[](ModulePassManager &module_pm, OptimizationLevel OL) {
module_pm.addPass(
@ -312,10 +305,10 @@ bool ZigLLVMTargetMachineEmitToFile(LLVMTargetMachineRef targ_machine_ref, LLVMM
opt_level = OptimizationLevel::O3;
// Initialize the PassManager
if (lto) {
if (opt_level == OptimizationLevel::O0) {
module_pm = pass_builder.buildO0DefaultPipeline(opt_level, lto);
} else if (lto) {
module_pm = pass_builder.buildLTOPreLinkDefaultPipeline(opt_level);
module_pm.addPass(CanonicalizeAliasesPass());
module_pm.addPass(NameAnonGlobalPass());
} else {
module_pm = pass_builder.buildPerModuleDefaultPipeline(opt_level);
}