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Make intrinsics.ptr_sub use explicit integer arithmetic internally

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This commit is contained in:
gingerBill
2022-11-11 15:52:49 +00:00
parent 035c75d6a9
commit fcd8860990
1 changed files with 9 additions and 9 deletions
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18
src/llvm_backend_proc.cpp
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@@ -2125,17 +2125,17 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
}
case BuiltinProc_ptr_sub:
{
lbValue ptr0 = lb_build_expr(p, ce->args[0]);
lbValue ptr1 = lb_build_expr(p, ce->args[1]);
Type *elem0 = type_deref(type_of_expr(ce->args[0]));
Type *elem1 = type_deref(type_of_expr(ce->args[1]));
GB_ASSERT(are_types_identical(elem0, elem1));
Type *elem = elem0;
LLVMTypeRef type_int = lb_type(p->module, t_int);
LLVMValueRef diff = LLVMBuildPtrDiff2(p->builder, lb_type(p->module, ptr0.type), ptr0.value, ptr1.value, "");
diff = LLVMBuildIntCast2(p->builder, diff, type_int, /*signed*/true, "");
lbValue ptr0 = lb_emit_conv(p, lb_build_expr(p, ce->args[0]), t_uintptr);
lbValue ptr1 = lb_emit_conv(p, lb_build_expr(p, ce->args[1]), t_uintptr);
lbValue res = {};
res.type = t_int;
res.value = diff;
return res;
lbValue diff = lb_emit_arith(p, Token_Sub, ptr0, ptr1, t_uintptr);
diff = lb_emit_conv(p, diff, t_int);
return lb_emit_arith(p, Token_Quo, diff, lb_const_int(p->module, t_int, type_size_of(elem)), t_int);
}