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/*
* Copyright (C) 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// Note that the empty string is present in the BootImage but the other one is a BSS string. We are
// testing both AOT LoadString kinds.
public class Main {
public static void main(String[] args) {
$noinline$testLength();
$noinline$testIsEmpty();
}
private static void $noinline$testLength() {
assertEquals(0, $noinline$testLengthEmptyString());
assertEquals(0, $noinline$testLengthEmptyStringWithInline());
assertEquals(32, $noinline$testLengthBssString());
assertEquals(32, $noinline$testLengthBssStringWithInline());
}
/// CHECK-START: int Main.$noinline$testLengthEmptyString() constant_folding (before)
/// CHECK: LoadString load_kind:BootImageRelRo
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: Return [<<Length>>]
/// CHECK-START: int Main.$noinline$testLengthEmptyString() constant_folding (after)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: Return [<<Const0>>]
/// CHECK-START: int Main.$noinline$testLengthEmptyString() dead_code_elimination$initial (after)
/// CHECK-NOT: LoadString
/// CHECK-START: int Main.$noinline$testLengthEmptyString() dead_code_elimination$initial (after)
/// CHECK-NOT: ArrayLength
private static int $noinline$testLengthEmptyString() {
String str = "";
return str.length();
}
/// CHECK-START: int Main.$noinline$testLengthEmptyStringWithInline() constant_folding$after_inlining (before)
/// CHECK: LoadString load_kind:BootImageRelRo
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: Return [<<Length>>]
/// CHECK-START: int Main.$noinline$testLengthEmptyStringWithInline() constant_folding$after_inlining (after)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: Return [<<Const0>>]
/// CHECK-START: int Main.$noinline$testLengthEmptyStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK-NOT: LoadString
/// CHECK-START: int Main.$noinline$testLengthEmptyStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK-NOT: ArrayLength
private static int $noinline$testLengthEmptyStringWithInline() {
String str = "";
return $inline$returnLength(str);
}
/// CHECK-START: int Main.$noinline$testLengthBssString() constant_folding (before)
/// CHECK: LoadString load_kind:BssEntry
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: Return [<<Length>>]
/// CHECK-START: int Main.$noinline$testLengthBssString() constant_folding (after)
/// CHECK: <<Const32:i\d+>> IntConstant 32
/// CHECK: Return [<<Const32>>]
// We don't remove LoadString load_kind:BssEntry even if they have no uses, since IsRemovable()
// returns false for them.
/// CHECK-START: int Main.$noinline$testLengthBssString() dead_code_elimination$initial (after)
/// CHECK: LoadString load_kind:BssEntry
/// CHECK-START: int Main.$noinline$testLengthBssString() dead_code_elimination$initial (after)
/// CHECK-NOT: ArrayLength
private static int $noinline$testLengthBssString() {
String str = "2047-checker-const-string-length";
return str.length();
}
/// CHECK-START: int Main.$noinline$testLengthBssStringWithInline() constant_folding$after_inlining (before)
/// CHECK: LoadString load_kind:BssEntry
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: Return [<<Length>>]
/// CHECK-START: int Main.$noinline$testLengthBssStringWithInline() constant_folding$after_inlining (after)
/// CHECK: <<Const32:i\d+>> IntConstant 32
/// CHECK: Return [<<Const32>>]
// We don't remove LoadString load_kind:BssEntry even if they have no uses, since IsRemovable()
// returns false for them.
/// CHECK-START: int Main.$noinline$testLengthBssStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK: LoadString load_kind:BssEntry
/// CHECK-START: int Main.$noinline$testLengthBssStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK-NOT: ArrayLength
private static int $noinline$testLengthBssStringWithInline() {
String str = "2047-checker-const-string-length";
return $inline$returnLength(str);
}
private static int $inline$returnLength(String str) {
return str.length();
}
private static void $noinline$testIsEmpty() {
assertEquals(true, $noinline$testIsEmptyEmptyString());
assertEquals(true, $noinline$testIsEmptyEmptyStringWithInline());
assertEquals(false, $noinline$testIsEmptyBssString());
assertEquals(false, $noinline$testIsEmptyBssStringWithInline());
}
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyString() constant_folding (before)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: LoadString load_kind:BootImageRelRo
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: <<Eq:z\d+>> Equal [<<Length>>,<<Const0>>]
/// CHECK: Return [<<Eq>>]
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyString() constant_folding (after)
/// CHECK: <<Const1:i\d+>> IntConstant 1
/// CHECK: Return [<<Const1>>]
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyString() dead_code_elimination$initial (after)
/// CHECK-NOT: LoadString
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyString() dead_code_elimination$initial (after)
/// CHECK-NOT: ArrayLength
private static boolean $noinline$testIsEmptyEmptyString() {
String str = "";
return str.isEmpty();
}
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyStringWithInline() constant_folding$after_inlining (before)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: LoadString load_kind:BootImageRelRo
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: <<Eq:z\d+>> Equal [<<Length>>,<<Const0>>]
/// CHECK: Return [<<Eq>>]
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyStringWithInline() constant_folding$after_inlining (after)
/// CHECK: <<Const1:i\d+>> IntConstant 1
/// CHECK: Return [<<Const1>>]
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK-NOT: LoadString
/// CHECK-START: boolean Main.$noinline$testIsEmptyEmptyStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK-NOT: ArrayLength
private static boolean $noinline$testIsEmptyEmptyStringWithInline() {
String str = "";
return $inline$returnIsEmpty(str);
}
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssString() constant_folding (before)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: LoadString load_kind:BssEntry
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: <<Eq:z\d+>> Equal [<<Length>>,<<Const0>>]
/// CHECK: Return [<<Eq>>]
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssString() constant_folding (after)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: Return [<<Const0>>]
// We don't remove LoadString load_kind:BssEntry even if they have no uses, since IsRemovable()
// returns false for them.
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssString() dead_code_elimination$initial (after)
/// CHECK: LoadString load_kind:BssEntry
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssString() dead_code_elimination$initial (after)
/// CHECK-NOT: ArrayLength
private static boolean $noinline$testIsEmptyBssString() {
String str = "2047-checker-const-string-length";
return str.isEmpty();
}
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssStringWithInline() constant_folding$after_inlining (before)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: LoadString load_kind:BssEntry
/// CHECK: <<Length:i\d+>> ArrayLength
/// CHECK: <<Eq:z\d+>> Equal [<<Length>>,<<Const0>>]
/// CHECK: Return [<<Eq>>]
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssStringWithInline() constant_folding$after_inlining (after)
/// CHECK: <<Const0:i\d+>> IntConstant 0
/// CHECK: Return [<<Const0>>]
// We don't remove LoadString load_kind:BssEntry even if they have no uses, since IsRemovable()
// returns false for them.
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK: LoadString load_kind:BssEntry
/// CHECK-START: boolean Main.$noinline$testIsEmptyBssStringWithInline() dead_code_elimination$after_inlining (after)
/// CHECK-NOT: ArrayLength
private static boolean $noinline$testIsEmptyBssStringWithInline() {
String str = "2047-checker-const-string-length";
return $inline$returnIsEmpty(str);
}
private static boolean $inline$returnIsEmpty(String str) {
return str.isEmpty();
}
static void assertEquals(int expected, int actual) {
if (expected != actual) {
throw new AssertionError("Expected " + expected + " got " + actual);
}
}
static void assertEquals(boolean expected, boolean actual) {
if (expected != actual) {
throw new AssertionError("Expected " + expected + " got " + actual);
}
}
}
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