diff options
Diffstat (limited to 'src/llvm_backend_const.cpp')
| -rw-r--r-- | src/llvm_backend_const.cpp | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/src/llvm_backend_const.cpp b/src/llvm_backend_const.cpp index 22e124792..8ce2137ab 100644 --- a/src/llvm_backend_const.cpp +++ b/src/llvm_backend_const.cpp @@ -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 instead 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; } |