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Make intrinsics.ptr_sub use explicit integer arithmetic internally

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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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src/llvm_backend_proc.cpp
+9 -9
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@@ -2125,17 +2125,17 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
} }
case BuiltinProc_ptr_sub: case BuiltinProc_ptr_sub:
{ {
lbValue ptr0 = lb_build_expr(p, ce->args[0]); Type *elem0 = type_deref(type_of_expr(ce->args[0]));
lbValue ptr1 = lb_build_expr(p, ce->args[1]); 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); lbValue ptr0 = lb_emit_conv(p, lb_build_expr(p, ce->args[0]), t_uintptr);
LLVMValueRef diff = LLVMBuildPtrDiff2(p->builder, lb_type(p->module, ptr0.type), ptr0.value, ptr1.value, ""); lbValue ptr1 = lb_emit_conv(p, lb_build_expr(p, ce->args[1]), t_uintptr);
diff = LLVMBuildIntCast2(p->builder, diff, type_int, /*signed*/true, "");
lbValue res = {}; lbValue diff = lb_emit_arith(p, Token_Sub, ptr0, ptr1, t_uintptr);
res.type = t_int; diff = lb_emit_conv(p, diff, t_int);
res.value = diff; return lb_emit_arith(p, Token_Quo, diff, lb_const_int(p->module, t_int, type_size_of(elem)), t_int);
return res;
} }