/*
* Copyright (C) 2015 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.
*/
public class Main {
public static boolean doThrow = false;
public static void assertIntEquals(int expected, int result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
public static void assertBooleanEquals(boolean expected, boolean result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
public static void assertCharEquals(char expected, char result) {
if (expected != result) {
throw new Error("Expected: " + expected + ", found: " + result);
}
}
public static void assertStringContains(String searchTerm, String result) {
if (result == null || !result.contains(searchTerm)) {
throw new Error("Search term: " + searchTerm + ", not found in: " + result);
}
}
public static void main(String[] args) {
stringEqualsSame();
stringArgumentNotNull("Foo");
assertIntEquals(0, $opt$noinline$getStringLength(""));
assertIntEquals(3, $opt$noinline$getStringLength("abc"));
assertIntEquals(10, $opt$noinline$getStringLength("0123456789"));
assertBooleanEquals(true, $opt$noinline$isStringEmpty(""));
assertBooleanEquals(false, $opt$noinline$isStringEmpty("abc"));
assertBooleanEquals(false, $opt$noinline$isStringEmpty("0123456789"));
assertCharEquals('a', $opt$noinline$stringCharAt("a", 0));
assertCharEquals('a', $opt$noinline$stringCharAt("abc", 0));
assertCharEquals('b', $opt$noinline$stringCharAt("abc", 1));
assertCharEquals('c', $opt$noinline$stringCharAt("abc", 2));
assertCharEquals('7', $opt$noinline$stringCharAt("0123456789", 7));
try {
$opt$noinline$stringCharAt("abc", -1);
throw new Error("Should throw SIOOB.");
} catch (StringIndexOutOfBoundsException sioob) {
assertStringContains("java.lang.String.charAt", sioob.getStackTrace()[0].toString());
assertStringContains("Main.$opt$noinline$stringCharAt", sioob.getStackTrace()[1].toString());
}
try {
$opt$noinline$stringCharAt("abc", 3);
throw new Error("Should throw SIOOB.");
} catch (StringIndexOutOfBoundsException sioob) {
assertStringContains("java.lang.String.charAt", sioob.getStackTrace()[0].toString());
assertStringContains("Main.$opt$noinline$stringCharAt", sioob.getStackTrace()[1].toString());
}
try {
$opt$noinline$stringCharAt("abc", Integer.MAX_VALUE);
throw new Error("Should throw SIOOB.");
} catch (StringIndexOutOfBoundsException sioob) {
assertStringContains("java.lang.String.charAt", sioob.getStackTrace()[0].toString());
assertStringContains("Main.$opt$noinline$stringCharAt", sioob.getStackTrace()[1].toString());
}
assertCharEquals('7', $opt$noinline$stringCharAtCatch("0123456789", 7));
assertCharEquals('\0', $opt$noinline$stringCharAtCatch("0123456789", 10));
assertIntEquals('a' + 'b' + 'c', $opt$noinline$stringSumChars("abc"));
assertIntEquals('a' + 'b' + 'c', $opt$noinline$stringSumLeadingChars("abcdef", 3));
try {
$opt$noinline$stringSumLeadingChars("abcdef", 7);
throw new Error("Should throw SIOOB.");
} catch (StringIndexOutOfBoundsException sioob) {
assertStringContains("java.lang.String.charAt", sioob.getStackTrace()[0].toString());
assertStringContains("Main.$opt$noinline$stringSumLeadingChars",
sioob.getStackTrace()[1].toString());
}
assertIntEquals('a' + 'b' + 'c' + 'd', $opt$noinline$stringSum4LeadingChars("abcdef"));
try {
$opt$noinline$stringSum4LeadingChars("abc");
throw new Error("Should throw SIOOB.");
} catch (StringIndexOutOfBoundsException sioob) {
assertStringContains("java.lang.String.charAt", sioob.getStackTrace()[0].toString());
assertStringContains("Main.$opt$noinline$stringSum4LeadingChars",
sioob.getStackTrace()[1].toString());
}
}
/// CHECK-START: int Main.$opt$noinline$getStringLength(java.lang.String) instruction_simplifier (before)
/// CHECK-DAG: <<Length:i\d+>> InvokeVirtual intrinsic:StringLength
/// CHECK-DAG: Return [<<Length>>]
/// CHECK-START: int Main.$opt$noinline$getStringLength(java.lang.String) instruction_simplifier (after)
/// CHECK-DAG: <<String:l\d+>> ParameterValue
/// CHECK-DAG: <<NullCk:l\d+>> NullCheck [<<String>>]
/// CHECK-DAG: <<Length:i\d+>> ArrayLength [<<NullCk>>] is_string_length:true
/// CHECK-DAG: Return [<<Length>>]
/// CHECK-START: int Main.$opt$noinline$getStringLength(java.lang.String) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringLength
static public int $opt$noinline$getStringLength(String s) {
if (doThrow) { throw new Error(); }
return s.length();
}
/// CHECK-START: boolean Main.$opt$noinline$isStringEmpty(java.lang.String) instruction_simplifier (before)
/// CHECK-DAG: <<IsEmpty:z\d+>> InvokeVirtual intrinsic:StringIsEmpty
/// CHECK-DAG: Return [<<IsEmpty>>]
/// CHECK-START: boolean Main.$opt$noinline$isStringEmpty(java.lang.String) instruction_simplifier (after)
/// CHECK-DAG: <<String:l\d+>> ParameterValue
/// CHECK-DAG: <<Const0:i\d+>> IntConstant 0
/// CHECK-DAG: <<NullCk:l\d+>> NullCheck [<<String>>]
/// CHECK-DAG: <<Length:i\d+>> ArrayLength [<<NullCk>>] is_string_length:true
/// CHECK-DAG: <<IsEmpty:z\d+>> Equal [<<Length>>,<<Const0>>]
/// CHECK-DAG: Return [<<IsEmpty>>]
/// CHECK-START: boolean Main.$opt$noinline$isStringEmpty(java.lang.String) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringIsEmpty
static public boolean $opt$noinline$isStringEmpty(String s) {
if (doThrow) { throw new Error(); }
return s.isEmpty();
}
/// CHECK-START: char Main.$opt$noinline$stringCharAt(java.lang.String, int) instruction_simplifier (before)
/// CHECK-DAG: <<Char:c\d+>> InvokeVirtual intrinsic:StringCharAt
/// CHECK-DAG: Return [<<Char>>]
/// CHECK-START: char Main.$opt$noinline$stringCharAt(java.lang.String, int) instruction_simplifier (after)
/// CHECK-DAG: <<String:l\d+>> ParameterValue
/// CHECK-DAG: <<Pos:i\d+>> ParameterValue
/// CHECK-DAG: <<NullCk:l\d+>> NullCheck [<<String>>]
/// CHECK-DAG: <<Length:i\d+>> ArrayLength [<<NullCk>>] is_string_length:true
/// CHECK-DAG: <<Bounds:i\d+>> BoundsCheck [<<Pos>>,<<Length>>] is_string_char_at:true
/// CHECK-DAG: <<Char:c\d+>> ArrayGet [<<NullCk>>,<<Bounds>>] is_string_char_at:true
/// CHECK-DAG: Return [<<Char>>]
/// CHECK-START: char Main.$opt$noinline$stringCharAt(java.lang.String, int) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringCharAt
static public char $opt$noinline$stringCharAt(String s, int pos) {
if (doThrow) { throw new Error(); }
return s.charAt(pos);
}
/// CHECK-START: char Main.$opt$noinline$stringCharAtCatch(java.lang.String, int) instruction_simplifier (before)
/// CHECK-DAG: <<Char:c\d+>> InvokeVirtual intrinsic:StringCharAt
/// CHECK-DAG: Return [<<Char>>]
/// CHECK-START: char Main.$opt$noinline$stringCharAtCatch(java.lang.String, int) instruction_simplifier (after)
/// CHECK-DAG: <<String:l\d+>> ParameterValue
/// CHECK-DAG: <<Pos:i\d+>> ParameterValue
/// CHECK-DAG: <<NullCk:l\d+>> NullCheck [<<String>>]
/// CHECK-DAG: <<Length:i\d+>> ArrayLength [<<NullCk>>] is_string_length:true
/// CHECK-DAG: <<Bounds:i\d+>> BoundsCheck [<<Pos>>,<<Length>>] is_string_char_at:true
/// CHECK-DAG: <<Char:c\d+>> ArrayGet [<<NullCk>>,<<Bounds>>] is_string_char_at:true
/// CHECK-DAG: Return [<<Char>>]
/// CHECK-START: char Main.$opt$noinline$stringCharAtCatch(java.lang.String, int) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringCharAt
static public char $opt$noinline$stringCharAtCatch(String s, int pos) {
if (doThrow) { throw new Error(); }
try {
return s.charAt(pos);
} catch (StringIndexOutOfBoundsException ignored) {
return '\0';
}
}
/// CHECK-START: int Main.$opt$noinline$stringSumChars(java.lang.String) instruction_simplifier (before)
/// CHECK-DAG: InvokeVirtual intrinsic:StringLength
/// CHECK-DAG: InvokeVirtual intrinsic:StringCharAt
/// CHECK-START: int Main.$opt$noinline$stringSumChars(java.lang.String) instruction_simplifier (after)
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: BoundsCheck is_string_char_at:true
/// CHECK-DAG: ArrayGet is_string_char_at:true
/// CHECK-START: int Main.$opt$noinline$stringSumChars(java.lang.String) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringLength
/// CHECK-NOT: InvokeVirtual intrinsic:StringCharAt
/// CHECK-START: int Main.$opt$noinline$stringSumChars(java.lang.String) GVN (after)
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-NOT: ArrayLength is_string_length:true
/// CHECK-START: int Main.$opt$noinline$stringSumChars(java.lang.String) BCE (after)
/// CHECK-NOT: BoundsCheck
static public int $opt$noinline$stringSumChars(String s) {
if (doThrow) { throw new Error(); }
int sum = 0;
int len = s.length();
for (int i = 0; i < len; ++i) {
sum += s.charAt(i);
}
return sum;
}
/// CHECK-START: int Main.$opt$noinline$stringSumLeadingChars(java.lang.String, int) instruction_simplifier (before)
/// CHECK-DAG: InvokeVirtual intrinsic:StringCharAt
/// CHECK-START: int Main.$opt$noinline$stringSumLeadingChars(java.lang.String, int) instruction_simplifier (after)
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: BoundsCheck is_string_char_at:true
/// CHECK-DAG: ArrayGet is_string_char_at:true
/// CHECK-START: int Main.$opt$noinline$stringSumLeadingChars(java.lang.String, int) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringCharAt
/// CHECK-START: int Main.$opt$noinline$stringSumLeadingChars(java.lang.String, int) BCE (after)
/// CHECK-DAG: Deoptimize env:[[{{[^\]]*}}]]
/// CHECK-START: int Main.$opt$noinline$stringSumLeadingChars(java.lang.String, int) BCE (after)
/// CHECK-NOT: BoundsCheck is_string_char_at:true
static public int $opt$noinline$stringSumLeadingChars(String s, int n) {
if (doThrow) { throw new Error(); }
int sum = 0;
for (int i = 0; i < n; ++i) {
sum += s.charAt(i);
}
return sum;
}
/// CHECK-START: int Main.$opt$noinline$stringSum4LeadingChars(java.lang.String) instruction_simplifier (before)
/// CHECK-DAG: InvokeVirtual intrinsic:StringCharAt
/// CHECK-DAG: InvokeVirtual intrinsic:StringCharAt
/// CHECK-DAG: InvokeVirtual intrinsic:StringCharAt
/// CHECK-DAG: InvokeVirtual intrinsic:StringCharAt
/// CHECK-START: int Main.$opt$noinline$stringSum4LeadingChars(java.lang.String) instruction_simplifier (after)
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: BoundsCheck is_string_char_at:true
/// CHECK-DAG: ArrayGet is_string_char_at:true
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: BoundsCheck is_string_char_at:true
/// CHECK-DAG: ArrayGet is_string_char_at:true
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: BoundsCheck is_string_char_at:true
/// CHECK-DAG: ArrayGet is_string_char_at:true
/// CHECK-DAG: ArrayLength is_string_length:true
/// CHECK-DAG: BoundsCheck is_string_char_at:true
/// CHECK-DAG: ArrayGet is_string_char_at:true
/// CHECK-START: int Main.$opt$noinline$stringSum4LeadingChars(java.lang.String) instruction_simplifier (after)
/// CHECK-NOT: InvokeVirtual intrinsic:StringCharAt
/// CHECK-START: int Main.$opt$noinline$stringSum4LeadingChars(java.lang.String) BCE (after)
/// CHECK-DAG: Deoptimize env:[[{{[^\]]*}}]]
/// CHECK-START: int Main.$opt$noinline$stringSum4LeadingChars(java.lang.String) BCE (after)
/// CHECK-NOT: BoundsCheck is_string_char_at:true
static public int $opt$noinline$stringSum4LeadingChars(String s) {
if (doThrow) { throw new Error(); }
int sum = s.charAt(0) + s.charAt(1) + s.charAt(2) + s.charAt(3);
return sum;
}
/// CHECK-START: boolean Main.stringEqualsSame() instruction_simplifier (before)
/// CHECK: InvokeStaticOrDirect
/// CHECK-START: boolean Main.stringEqualsSame() register (before)
/// CHECK: <<Const1:i\d+>> IntConstant 1
/// CHECK: Return [<<Const1>>]
/// CHECK-START: boolean Main.stringEqualsSame() register (before)
/// CHECK-NOT: InvokeStaticOrDirect
public static boolean stringEqualsSame() {
return $inline$callStringEquals("obj", "obj");
}
/// CHECK-START: boolean Main.stringEqualsNull() register (after)
/// CHECK: <<Invoke:z\d+>> InvokeVirtual
/// CHECK: Return [<<Invoke>>]
public static boolean stringEqualsNull() {
String o = (String)myObject;
return $inline$callStringEquals(o, o);
}
public static boolean $inline$callStringEquals(String a, String b) {
return a.equals(b);
}
/// CHECK-START-X86: boolean Main.stringArgumentNotNull(java.lang.Object) disassembly (after)
/// CHECK: InvokeVirtual {{.*\.equals.*}} intrinsic:StringEquals
/// CHECK-NOT: test
/// CHECK-START-X86_64: boolean Main.stringArgumentNotNull(java.lang.Object) disassembly (after)
/// CHECK: InvokeVirtual {{.*\.equals.*}} intrinsic:StringEquals
/// CHECK-NOT: test
/// CHECK-START-ARM: boolean Main.stringArgumentNotNull(java.lang.Object) disassembly (after)
/// CHECK: InvokeVirtual {{.*\.equals.*}} intrinsic:StringEquals
// CompareAndBranchIfZero() may emit either CBZ or CMP+BEQ.
/// CHECK-NOT: cbz
/// CHECK-NOT: cmp {{r\d+}}, #0
// Terminate the scope for the CHECK-NOT search at the reference or length comparison,
// whichever comes first.
/// CHECK: cmp {{r\d+}}, {{r\d+}}
/// CHECK-START-ARM64: boolean Main.stringArgumentNotNull(java.lang.Object) disassembly (after)
/// CHECK: InvokeVirtual {{.*\.equals.*}} intrinsic:StringEquals
/// CHECK-NOT: cbz
// Terminate the scope for the CHECK-NOT search at the reference or length comparison,
// whichever comes first.
/// CHECK: cmp {{w.*,}} {{w.*|#.*}}
/// CHECK-START-MIPS: boolean Main.stringArgumentNotNull(java.lang.Object) disassembly (after)
/// CHECK: InvokeVirtual {{.*\.equals.*}} intrinsic:StringEquals
/// CHECK-NOT: beq r0,
/// CHECK-NOT: beqz
/// CHECK-NOT: beqzc
// Terminate the scope for the CHECK-NOT search at the class field or length comparison,
// whichever comes first.
/// CHECK: lw
/// CHECK-START-MIPS64: boolean Main.stringArgumentNotNull(java.lang.Object) disassembly (after)
/// CHECK: InvokeVirtual {{.*\.equals.*}} intrinsic:StringEquals
/// CHECK-NOT: beqzc
// Terminate the scope for the CHECK-NOT search at the reference comparison.
/// CHECK: beqc
public static boolean stringArgumentNotNull(Object obj) {
obj.getClass();
return "foo".equals(obj);
}
// Test is very brittle as it depends on the order we emit instructions.
/// CHECK-START-X86: boolean Main.stringArgumentIsString() disassembly (after)
/// CHECK: InvokeVirtual intrinsic:StringEquals
/// CHECK: test
/// CHECK: jz/eq
// Check that we don't try to compare the classes.
/// CHECK-NOT: mov
/// CHECK: cmp
// Test is very brittle as it depends on the order we emit instructions.
/// CHECK-START-X86_64: boolean Main.stringArgumentIsString() disassembly (after)
/// CHECK: InvokeVirtual intrinsic:StringEquals
/// CHECK: test
/// CHECK: jz/eq
// Check that we don't try to compare the classes.
/// CHECK-NOT: mov
/// CHECK: cmp
// Test is brittle as it depends on the class offset being 0.
/// CHECK-START-ARM: boolean Main.stringArgumentIsString() disassembly (after)
/// CHECK: InvokeVirtual intrinsic:StringEquals
/// CHECK: {{cbz|cmp}}
// Check that we don't try to compare the classes.
// The dissassembler currently explicitly emits the offset 0 but don't rely on it.
// We want to terminate the CHECK-NOT search after two CMPs, one for reference
// equality and one for length comparison but these may be emitted in different order,
// so repeat the check twice.
/// CHECK-NOT: ldr{{(|.w)}} {{r\d+}}, [{{r\d+}}]
/// CHECK-NOT: ldr{{(|.w)}} {{r\d+}}, [{{r\d+}}, #0]
/// CHECK: cmp {{r\d+}}, {{r\d+}}
/// CHECK-NOT: ldr{{(|.w)}} {{r\d+}}, [{{r\d+}}]
/// CHECK-NOT: ldr{{(|.w)}} {{r\d+}}, [{{r\d+}}, #0]
/// CHECK: cmp {{r\d+}}, {{r\d+}}
// Test is brittle as it depends on the class offset being 0.
/// CHECK-START-ARM64: boolean Main.stringArgumentIsString() disassembly (after)
/// CHECK: InvokeVirtual intrinsic:StringEquals
/// CHECK: cbz
// Check that we don't try to compare the classes.
// The dissassembler currently does not explicitly emits the offset 0 but don't rely on it.
// We want to terminate the CHECK-NOT search after two CMPs, one for reference
// equality and one for length comparison but these may be emitted in different order,
// so repeat the check twice.
/// CHECK-NOT: ldr {{w\d+}}, [{{x\d+}}]
/// CHECK-NOT: ldr {{w\d+}}, [{{x\d+}}, #0]
/// CHECK: cmp {{w\d+}}, {{w\d+|#.*}}
/// CHECK-NOT: ldr {{w\d+}}, [{{x\d+}}]
/// CHECK-NOT: ldr {{w\d+}}, [{{x\d+}}, #0]
/// CHECK: cmp {{w\d+}}, {{w\d+|#.*}}
// Test is brittle as it depends on the class offset being 0.
/// CHECK-START-MIPS: boolean Main.stringArgumentIsString() disassembly (after)
/// CHECK: InvokeVirtual intrinsic:StringEquals
/// CHECK: beq{{(zc)?}}
// Check that we don't try to compare the classes.
/// CHECK-NOT: lw {{r\d+}}, +0({{r\d+}})
/// CHECK: bne{{c?}}
// Test is brittle as it depends on the class offset being 0.
/// CHECK-START-MIPS64: boolean Main.stringArgumentIsString() disassembly (after)
/// CHECK: InvokeVirtual intrinsic:StringEquals
/// CHECK: beqzc
// Check that we don't try to compare the classes.
/// CHECK-NOT: lw {{r\d+}}, +0({{r\d+}})
/// CHECK: bnec
public static boolean stringArgumentIsString() {
return "foo".equals(myString);
}
static String myString;
static Object myObject;
}