[webkit-changes] [142779] trunk

Wed, 13 Feb 2013 12:58:01 -0800

Title: [142779] trunk
Revision
142779
Author
[email protected]
Date
2013-02-13 13:00:01 -0800 (Wed, 13 Feb 2013)

Log Message

DFG LogicalNot/Branch peephole removal and inversion ignores the possibility of things exiting
https://bugs.webkit.org/show_bug.cgi?id=109489

Source/_javascript_Core: 

Reviewed by Mark Hahnenberg.
        
If things can exit between the LogicalNot and the Branch then don't peephole.

* dfg/DFGFixupPhase.cpp:
(JSC::DFG::FixupPhase::fixupNode):

LayoutTests: 

Reviewed by Mark Hahnenberg.

* fast/js/dfg-branch-logical-not-peephole-around-osr-exit-expected.txt: Added.
* fast/js/dfg-branch-logical-not-peephole-around-osr-exit.html: Added.
* fast/js/jsc-test-list:
* fast/js/script-tests/dfg-branch-logical-not-peephole-around-osr-exit.js: Added.
(foo):

Modified Paths

Added Paths

Diff

Modified: trunk/LayoutTests/ChangeLog (142778 => 142779)


--- trunk/LayoutTests/ChangeLog	2013-02-13 20:58:15 UTC (rev 142778)
+++ trunk/LayoutTests/ChangeLog	2013-02-13 21:00:01 UTC (rev 142779)
@@ -1,3 +1,16 @@
+2013-02-13  Filip Pizlo  <[email protected]>
+
+        DFG LogicalNot/Branch peephole removal and inversion ignores the possibility of things exiting
+        https://bugs.webkit.org/show_bug.cgi?id=109489
+
+        Reviewed by Mark Hahnenberg.
+
+        * fast/js/dfg-branch-logical-not-peephole-around-osr-exit-expected.txt: Added.
+        * fast/js/dfg-branch-logical-not-peephole-around-osr-exit.html: Added.
+        * fast/js/jsc-test-list:
+        * fast/js/script-tests/dfg-branch-logical-not-peephole-around-osr-exit.js: Added.
+        (foo):
+
 2013-02-12  Dean Jackson  <[email protected]>
 
         Clicking outside captions menu should dismiss it

Added: trunk/LayoutTests/fast/js/dfg-branch-logical-not-peephole-around-osr-exit-expected.txt (0 => 142779)


--- trunk/LayoutTests/fast/js/dfg-branch-logical-not-peephole-around-osr-exit-expected.txt	                        (rev 0)
+++ trunk/LayoutTests/fast/js/dfg-branch-logical-not-peephole-around-osr-exit-expected.txt	2013-02-13 21:00:01 UTC (rev 142779)
@@ -0,0 +1,209 @@
+Tests that our attempts to do peephole Branch(LogicalNot) optimization doesn't break OSR exit's ability to recover the value of LogicalNot.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 6
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 7
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 8
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 9
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 10
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 9
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 12
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 13
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 14
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 15
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 16
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 17
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 18
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 19
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 20
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 21
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 22
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 23
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 24
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 25
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 26
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 27
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 28
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 29
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 30
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 31
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 32
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 33
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 34
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 35
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 36
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 37
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 38
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 39
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 40
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 41
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 42
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 43
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 44
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 45
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 46
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 47
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 48
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 49
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 50
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 51
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 52
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 53
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 54
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 55
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 56
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 57
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 58
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 59
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 60
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 61
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 62
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 63
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 64
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 65
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 66
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 67
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 68
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 69
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 70
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 71
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 72
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 73
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 74
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 75
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 76
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 77
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 78
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 79
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 80
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 81
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 82
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 83
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 84
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 85
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 86
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 87
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 88
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 89
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 90
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 91
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 92
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 93
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 94
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 95
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 96
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 97
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 98
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 99
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 100
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 101
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 102
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 103
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 104
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 105
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 106
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 107
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 108
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 109
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 110
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 111
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 112
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 113
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 114
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 115
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 116
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 117
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 118
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 119
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 120
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 121
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 122
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 123
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 124
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 125
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 126
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 127
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 128
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 129
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 130
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 131
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 132
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 133
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 134
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 135
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 136
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 137
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 138
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 139
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 140
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 141
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 142
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 143
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 144
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 145
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 146
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 147
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 148
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 149
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 150
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 151
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 152
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 153
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 154
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 155
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 156
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 157
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 158
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 159
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 160
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 161
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 162
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 163
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 164
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 165
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 166
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 167
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 168
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 169
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 170
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 171
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 172
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 173
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 174
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 175
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 176
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 177
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 178
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 179
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 180
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 181
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 182
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 183
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 184
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 185
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 186
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 187
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 188
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 189
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 190
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 191
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 192
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 193
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 194
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 195
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 196
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 197
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 198
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 199
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 200
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 201
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 202
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 203
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 204
+PASS foo(i, 5, i == 199 ? 2147483647 : 5) is 2147483847
+PASS successfullyParsed is true
+
+TEST COMPLETE
+

Added: trunk/LayoutTests/fast/js/dfg-branch-logical-not-peephole-around-osr-exit.html (0 => 142779)


--- trunk/LayoutTests/fast/js/dfg-branch-logical-not-peephole-around-osr-exit.html	                        (rev 0)
+++ trunk/LayoutTests/fast/js/dfg-branch-logical-not-peephole-around-osr-exit.html	2013-02-13 21:00:01 UTC (rev 142779)
@@ -0,0 +1,10 @@
+<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
+<html>
+<head>
+<script src=""
+</head>
+<body>
+<script src=""
+<script src=""
+</body>
+</html>

Modified: trunk/LayoutTests/fast/js/jsc-test-list (142778 => 142779)


--- trunk/LayoutTests/fast/js/jsc-test-list	2013-02-13 20:58:15 UTC (rev 142778)
+++ trunk/LayoutTests/fast/js/jsc-test-list	2013-02-13 21:00:01 UTC (rev 142779)
@@ -89,6 +89,7 @@
 fast/js/dfg-array-push-bad-time
 fast/js/dfg-array-push-slow-put
 fast/js/dfg-bool-to-int32-reuse
+fast/js/dfg-branch-logical-not-peephole-around-osr-exit
 fast/js/dfg-branch-not-fail
 fast/js/dfg-cfa-merge-with-dead-use-at-tail
 fast/js/dfg-cfg-simplify-phantom-get-local-on-same-block-set-local

Added: trunk/LayoutTests/fast/js/script-tests/dfg-branch-logical-not-peephole-around-osr-exit.js (0 => 142779)


--- trunk/LayoutTests/fast/js/script-tests/dfg-branch-logical-not-peephole-around-osr-exit.js	                        (rev 0)
+++ trunk/LayoutTests/fast/js/script-tests/dfg-branch-logical-not-peephole-around-osr-exit.js	2013-02-13 21:00:01 UTC (rev 142779)
@@ -0,0 +1,19 @@
+description(
+"Tests that our attempts to do peephole Branch(LogicalNot) optimization doesn't break OSR exit's ability to recover the value of LogicalNot."
+);
+
+function foo(a, b, c) {
+    var x = a !== b;
+    var result = a + c;
+    if (x)
+        result++;
+    else
+        result--;
+    return result;
+}
+
+for (var i = 0; i < 200; ++i) {
+    var expected = i + (i == 199 ? 2147483647 : 5) + (i !== 5 ? 1 : -1)
+    shouldBe("foo(i, 5, i == 199 ? 2147483647 : 5)", "" + expected);
+}
+

Modified: trunk/Source/_javascript_Core/ChangeLog (142778 => 142779)


--- trunk/Source/_javascript_Core/ChangeLog	2013-02-13 20:58:15 UTC (rev 142778)
+++ trunk/Source/_javascript_Core/ChangeLog	2013-02-13 21:00:01 UTC (rev 142779)
@@ -1,3 +1,15 @@
+2013-02-12  Filip Pizlo  <[email protected]>
+
+        DFG LogicalNot/Branch peephole removal and inversion ignores the possibility of things exiting
+        https://bugs.webkit.org/show_bug.cgi?id=109489
+
+        Reviewed by Mark Hahnenberg.
+        
+        If things can exit between the LogicalNot and the Branch then don't peephole.
+
+        * dfg/DFGFixupPhase.cpp:
+        (JSC::DFG::FixupPhase::fixupNode):
+
 2013-02-13  Oliver Hunt  <[email protected]>
 
         Remove unnecessary indirection to non-local variable access operations

Modified: trunk/Source/_javascript_Core/dfg/DFGFixupPhase.cpp (142778 => 142779)


--- trunk/Source/_javascript_Core/dfg/DFGFixupPhase.cpp	2013-02-13 20:58:15 UTC (rev 142778)
+++ trunk/Source/_javascript_Core/dfg/DFGFixupPhase.cpp	2013-02-13 21:00:01 UTC (rev 142779)
@@ -232,17 +232,40 @@
             Node* logicalNot = node->child1().node();
             if (logicalNot->op() == LogicalNot
                 && logicalNot->adjustedRefCount() == 1) {
-                Edge newChildEdge = logicalNot->child1();
-                if (newChildEdge->hasBooleanResult()) {
-                    m_graph.ref(newChildEdge);
-                    m_graph.deref(logicalNot);
-                    node->children.setChild1(newChildEdge);
-                    
-                    BlockIndex toBeTaken = node->notTakenBlockIndex();
-                    BlockIndex toBeNotTaken = node->takenBlockIndex();
-                    node->setTakenBlockIndex(toBeTaken);
-                    node->setNotTakenBlockIndex(toBeNotTaken);
+                
+                // Make sure that OSR exit can't observe the LogicalNot. If it can,
+                // then we must compute it and cannot peephole around it.
+                bool found = false;
+                bool ok = true;
+                for (unsigned i = m_indexInBlock; i--;) {
+                    Node* candidate = m_block->at(i);
+                    if (!candidate->shouldGenerate())
+                        continue;
+                    if (candidate == logicalNot) {
+                        found = true;
+                        break;
+                    }
+                    if (candidate->canExit()) {
+                        ok = false;
+                        found = true;
+                        break;
+                    }
                 }
+                ASSERT_UNUSED(found, found);
+                
+                if (ok) {
+                    Edge newChildEdge = logicalNot->child1();
+                    if (newChildEdge->hasBooleanResult()) {
+                        m_graph.ref(newChildEdge);
+                        m_graph.deref(logicalNot);
+                        node->children.setChild1(newChildEdge);
+                        
+                        BlockIndex toBeTaken = node->notTakenBlockIndex();
+                        BlockIndex toBeNotTaken = node->takenBlockIndex();
+                        node->setTakenBlockIndex(toBeTaken);
+                        node->setNotTakenBlockIndex(toBeNotTaken);
+                    }
+                }
             }
             break;
         }

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