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Do not need an extra local copy for the slices

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gingerBill
2025-09-28 23:32:37 +01:00
parent 6db8943efa
commit dd15a5bc8e
1 changed files with 18 additions and 9 deletions
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src/llvm_backend_const.cpp
+18 -9
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@@ -785,7 +785,7 @@ gb_internal lbValue lb_const_value(lbModule *m, Type *type, ExactValue value, lb
GB_ASSERT(is_type_slice(type));
res.value = lb_find_or_add_entity_string16_slice_with_type(m, value.value_string16, original_type).value;
return res;
}else {
} else {
ast_node(cl, CompoundLit, value.value_compound);
isize count = cl->elems.count;
@@ -808,16 +808,25 @@ gb_internal lbValue lb_const_value(lbModule *m, Type *type, ExactValue value, lb
unsigned alignment = cast(unsigned)gb_max(type_align_of(t), 16);
LLVMValueRef local_copy = llvm_alloca(p, LLVMTypeOf(backing_array.value), alignment);
LLVMBuildStore(p->builder, backing_array.value, local_copy);
array_data = llvm_alloca(p, llvm_type, alignment);
bool do_local_copy = false;
if (do_local_copy) {
array_data = llvm_alloca(p, llvm_type, alignment);
LLVMBuildMemCpy(p->builder,
array_data, alignment,
local_copy, alignment,
LLVMConstInt(lb_type(m, t_int), type_size_of(t), false)
);
LLVMValueRef local_copy = llvm_alloca(p, LLVMTypeOf(backing_array.value), alignment);
LLVMBuildStore(p->builder, backing_array.value, local_copy);
LLVMBuildMemCpy(p->builder,
array_data, alignment,
local_copy, alignment,
LLVMConstInt(lb_type(m, t_int), type_size_of(t), false)
);
} else {
array_data = llvm_alloca(p, LLVMTypeOf(backing_array.value), alignment);
LLVMBuildStore(p->builder, backing_array.value, array_data);
array_data = LLVMBuildPointerCast(p->builder, array_data, LLVMPointerType(llvm_type, 0), "");
}
{