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Fix literal endianness (fix #6068)

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ske
2025-12-30 22:08:40 -03:00
parent 107104ab4b
commit e4bf5476c3
4 changed files with 112 additions and 5 deletions
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23
src/llvm_backend_const.cpp
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@@ -498,6 +498,13 @@ gb_internal LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, Bi
if (big_int_is_zero(a)) {
return LLVMConstNull(lb_type(m, original_type));
}
BigInt val = {};
big_int_init(&val, a);
if (big_int_is_neg(&val)) {
mp_incr(&val);
}
size_t sz = cast(size_t)type_size_of(original_type);
u64 rop64[4] = {}; // 2 u64 is the maximum we will ever need, so doubling it will be fine :P
@@ -509,7 +516,7 @@ gb_internal LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, Bi
size_t nails = 0;
mp_endian endian = MP_LITTLE_ENDIAN;
max_count = mp_pack_count(a, nails, size);
max_count = mp_pack_count(&val, nails, size);
if (sz < max_count) {
debug_print_big_int(a);
gb_printf_err("%s -> %tu\n", type_to_string(original_type), sz);
@@ -520,7 +527,7 @@ gb_internal LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, Bi
mp_err err = mp_pack(rop, sz, &written,
MP_LSB_FIRST,
size, endian, nails,
a);
&val);
GB_ASSERT(err == MP_OKAY);
if (!is_type_endian_little(original_type)) {
@@ -531,12 +538,18 @@ gb_internal LLVMValueRef lb_big_int_to_llvm(lbModule *m, Type *original_type, Bi
}
}
if (big_int_is_neg(a)) {
// sizeof intead of sz for sign extend to work properly
for (size_t i = 0; i < sizeof rop64; i++) {
rop[i] = ~rop[i];
}
}
big_int_dealloc(&val);
GB_ASSERT(!is_type_array(original_type));
LLVMValueRef value = LLVMConstIntOfArbitraryPrecision(lb_type(m, original_type), cast(unsigned)((sz+7)/8), cast(u64 *)rop);
if (big_int_is_neg(a)) {
value = LLVMConstNeg(value);
}
return value;
}