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Improve support for freestanding_wasm32

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This commit is contained in:
gingerBill
2021-11-07 16:19:27 +00:00
parent e9c903f1ea
commit dc2edd3e79
7 changed files with 123 additions and 37 deletions
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70
src/llvm_backend_opt.cpp
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@@ -373,6 +373,20 @@ void lb_run_function_pass_manager(LLVMPassManagerRef fpm, lbProcedure *p) {
lb_run_remove_dead_instruction_pass(p);
}
void llvm_delete_function(LLVMValueRef func) {
// for (LLVMBasicBlockRef block = LLVMGetFirstBasicBlock(func); block != nullptr; /**/) {
// LLVMBasicBlockRef curr_block = block;
// block = LLVMGetNextBasicBlock(block);
// for (LLVMValueRef instr = LLVMGetFirstInstruction(curr_block); instr != nullptr; /**/) {
// LLVMValueRef curr_instr = instr;
// instr = LLVMGetNextInstruction(instr);
// LLVMInstructionEraseFromParent(curr_instr);
// }
// LLVMRemoveBasicBlockFromParent(curr_block);
// }
LLVMDeleteFunction(func);
}
void lb_run_remove_unused_function_pass(lbModule *m) {
isize removal_count = 0;
@@ -380,7 +394,7 @@ void lb_run_remove_unused_function_pass(lbModule *m) {
isize const max_pass_count = 10;
// Custom remove dead function pass
for (; pass_count < max_pass_count; pass_count++) {
bool was_dead_function = false;
bool was_dead = false;
for (LLVMValueRef func = LLVMGetFirstFunction(m->mod);
func != nullptr;
/**/
@@ -412,12 +426,58 @@ void lb_run_remove_unused_function_pass(lbModule *m) {
continue;
}
}
LLVMDeleteFunction(curr_func);
was_dead_function = true;
llvm_delete_function(curr_func);
was_dead = true;
removal_count += 1;
}
if (!was_dead_function) {
if (!was_dead) {
break;
}
}
}
void lb_run_remove_unused_globals_pass(lbModule *m) {
isize removal_count = 0;
isize pass_count = 0;
isize const max_pass_count = 10;
// Custom remove dead function pass
for (; pass_count < max_pass_count; pass_count++) {
bool was_dead = false;
for (LLVMValueRef global = LLVMGetFirstGlobal(m->mod);
global != nullptr;
/**/
) {
LLVMValueRef curr_global = global;
global = LLVMGetNextGlobal(global);
LLVMUseRef first_use = LLVMGetFirstUse(curr_global);
if (first_use != nullptr) {
continue;
}
String name = {};
name.text = cast(u8 *)LLVMGetValueName2(curr_global, cast(size_t *)&name.len);
LLVMLinkage linkage = LLVMGetLinkage(curr_global);
if (linkage != LLVMInternalLinkage) {
continue;
}
Entity **found = map_get(&m->procedure_values, curr_global);
if (found && *found) {
Entity *e = *found;
bool is_required = (e->flags & EntityFlag_Require) == EntityFlag_Require;
if (is_required) {
continue;
}
}
LLVMDeleteGlobal(curr_global);
was_dead = true;
removal_count += 1;
}
if (!was_dead) {
break;
}
}