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Fix different endian integers for LLVM C API backend

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gingerBill
2020-06-05 13:12:57 +01:00
parent f992e36f9a
commit d8f9daac95
1 changed files with 22 additions and 3 deletions
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src/llvm_backend.cpp
+22 -3
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@@ -4771,9 +4771,28 @@ lbValue lb_const_value(lbModule *m, Type *type, ExactValue value) {
LLVMValueRef i = LLVMConstIntOfArbitraryPrecision(lb_type(m, t_uintptr), cast(unsigned)value.value_integer.len, big_int_ptr(&value.value_integer)); LLVMValueRef i = LLVMConstIntOfArbitraryPrecision(lb_type(m, t_uintptr), cast(unsigned)value.value_integer.len, big_int_ptr(&value.value_integer));
res.value = LLVMConstIntToPtr(i, lb_type(m, original_type)); res.value = LLVMConstIntToPtr(i, lb_type(m, original_type));
} else { } else {
res.value = LLVMConstIntOfArbitraryPrecision(lb_type(m, original_type), cast(unsigned)value.value_integer.len, big_int_ptr(&value.value_integer)); unsigned len = cast(unsigned)value.value_integer.len;
if (value.value_integer.neg) { if (len == 0) {
res.value = LLVMConstNeg(res.value); u64 word = 0;
res.value = LLVMConstNull(lb_type(m, original_type));
} else {
u64 *words = big_int_ptr(&value.value_integer);
if (is_type_different_to_arch_endianness(type)) {
// NOTE(bill): Swap byte order for different endianness
i64 sz = type_size_of(type);
isize byte_len = gb_size_of(u64)*len;
u8 *old_bytes = cast(u8 *)words;
// TODO(bill): Use a different allocator here for a temporary allocation
u8 *new_bytes = cast(u8 *)gb_alloc_align(heap_allocator(), byte_len, gb_align_of(u64));
for (i64 i = 0; i < sz; i++) {
new_bytes[i] = old_bytes[sz-1-i];
}
words = cast(u64 *)new_bytes;
}
res.value = LLVMConstIntOfArbitraryPrecision(lb_type(m, original_type), len, words);
if (value.value_integer.neg) {
res.value = LLVMConstNeg(res.value);
}
} }
} }
return res; return res;