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Fix pseudo-constant local embedded slice generation

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This commit is contained in:
gingerBill
2021-03-25 22:27:52 +00:00
parent 23c68b4f7a
commit 50b439daa8
1 changed files with 39 additions and 3 deletions
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src/llvm_backend.cpp
+39 -3
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@@ -6063,12 +6063,48 @@ lbValue lb_const_value(lbModule *m, Type *type, ExactValue value, bool allow_loc
values[0] = LLVMConstNull(lb_alignment_prefix_type_hack(m, type->Struct.custom_align));
}
bool is_constant = true;
for (isize i = 0; i < value_count; i++) {
GB_ASSERT(LLVMIsConstant(values[i]) || LLVMIsGlobalConstant(values[i]));
LLVMValueRef val = values[i];
if (!LLVMIsConstant(val)) {
GB_ASSERT(is_local);
GB_ASSERT(LLVMGetInstructionOpcode(val) == LLVMLoad);
is_constant = false;
}
}
res.value = llvm_const_named_struct(lb_type(m, original_type), values, cast(unsigned)value_count);
return res;
if (is_constant) {
res.value = llvm_const_named_struct(lb_type(m, original_type), values, cast(unsigned)value_count);
return res;
} else {
// TODO(bill): THIS IS HACK BUT IT WORKS FOR WHAT I NEED
LLVMValueRef *new_values = gb_alloc_array(temporary_allocator(), LLVMValueRef, value_count);
for (isize i = 0; i < value_count; i++) {
LLVMValueRef val = values[i];
if (LLVMIsConstant(val)) {
new_values[i] = val;
} else {
values[i] = lb_const_nil(m, get_struct_field_type(type, i-offset)).value;
}
}
LLVMValueRef constant_value = llvm_const_named_struct(lb_type(m, original_type), values, cast(unsigned)value_count);
GB_ASSERT(is_local);
lbProcedure *p = m->curr_procedure;
lbAddr v = lb_add_local_generated(p, res.type, false);
LLVMBuildStore(p->builder, constant_value, v.addr.value);
for (isize i = 0; i < value_count; i++) {
LLVMValueRef val = values[i];
if (!LLVMIsConstant(val)) {
LLVMValueRef dst = LLVMBuildStructGEP(p->builder, v.addr.value, cast(unsigned)i, "");
LLVMBuildStore(p->builder, dst, val);
}
}
return lb_addr_load(p, v);
}
} else if (is_type_bit_set(type)) {
ast_node(cl, CompoundLit, value.value_compound);
if (cl->elems.count == 0) {