Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/compiler/ast-loop-assignment-analyzer.h" |
| 6 | #include "src/parser.h" |
| 7 | #include "src/rewriter.h" |
| 8 | #include "src/scopes.h" |
| 9 | #include "test/cctest/cctest.h" |
| 10 | |
| 11 | using namespace v8::internal; |
| 12 | using namespace v8::internal::compiler; |
| 13 | |
| 14 | namespace { |
| 15 | const int kBufferSize = 1024; |
| 16 | |
| 17 | struct TestHelper : public HandleAndZoneScope { |
| 18 | Handle<JSFunction> function; |
| 19 | LoopAssignmentAnalysis* result; |
| 20 | |
| 21 | explicit TestHelper(const char* body) |
| 22 | : function(Handle<JSFunction>::null()), result(NULL) { |
| 23 | ScopedVector<char> program(kBufferSize); |
| 24 | SNPrintF(program, "function f(a,b,c) { %s; } f;", body); |
| 25 | v8::Local<v8::Value> v = CompileRun(program.start()); |
| 26 | Handle<Object> obj = v8::Utils::OpenHandle(*v); |
| 27 | function = Handle<JSFunction>::cast(obj); |
| 28 | } |
| 29 | |
| 30 | void CheckLoopAssignedCount(int expected, const char* var_name) { |
| 31 | // TODO(titzer): don't scope analyze every single time. |
| 32 | CompilationInfo info(function, main_zone()); |
| 33 | |
| 34 | CHECK(Parser::Parse(&info)); |
| 35 | CHECK(Rewriter::Rewrite(&info)); |
| 36 | CHECK(Scope::Analyze(&info)); |
| 37 | |
| 38 | Scope* scope = info.function()->scope(); |
| 39 | AstValueFactory* factory = info.ast_value_factory(); |
| 40 | CHECK_NE(NULL, scope); |
| 41 | |
| 42 | if (result == NULL) { |
| 43 | AstLoopAssignmentAnalyzer analyzer(main_zone(), &info); |
| 44 | result = analyzer.Analyze(); |
| 45 | CHECK_NE(NULL, result); |
| 46 | } |
| 47 | |
| 48 | const i::AstRawString* name = factory->GetOneByteString(var_name); |
| 49 | |
| 50 | i::Variable* var = scope->Lookup(name); |
| 51 | CHECK_NE(NULL, var); |
| 52 | |
| 53 | if (var->location() == Variable::UNALLOCATED) { |
| 54 | CHECK_EQ(0, expected); |
| 55 | } else { |
| 56 | CHECK(var->IsStackAllocated()); |
| 57 | CHECK_EQ(expected, result->GetAssignmentCountForTesting(scope, var)); |
| 58 | } |
| 59 | } |
| 60 | }; |
| 61 | } |
| 62 | |
| 63 | |
| 64 | TEST(SimpleLoop1) { |
| 65 | TestHelper f("var x = 0; while (x) ;"); |
| 66 | |
| 67 | f.CheckLoopAssignedCount(0, "x"); |
| 68 | } |
| 69 | |
| 70 | |
| 71 | TEST(SimpleLoop2) { |
| 72 | const char* loops[] = { |
| 73 | "while (x) { var x = 0; }", "for(;;) { var x = 0; }", |
| 74 | "for(;x;) { var x = 0; }", "for(;x;x) { var x = 0; }", |
| 75 | "for(var i = x; x; x) { var x = 0; }", "for(y in 0) { var x = 0; }", |
| 76 | "for(y of 0) { var x = 0; }", "for(var x = 0; x; x++) { }", |
| 77 | "for(var x = 0; x++;) { }", "var x; for(;x;x++) { }", |
| 78 | "var x; do { x = 1; } while (0);", "do { var x = 1; } while (0);"}; |
| 79 | |
| 80 | for (size_t i = 0; i < arraysize(loops); i++) { |
| 81 | TestHelper f(loops[i]); |
| 82 | f.CheckLoopAssignedCount(1, "x"); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | |
| 87 | TEST(ForInOf1) { |
| 88 | const char* loops[] = { |
| 89 | "for(x in 0) { }", "for(x of 0) { }", |
| 90 | }; |
| 91 | |
| 92 | for (size_t i = 0; i < arraysize(loops); i++) { |
| 93 | TestHelper f(loops[i]); |
| 94 | f.CheckLoopAssignedCount(0, "x"); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | |
| 99 | TEST(Param1) { |
| 100 | TestHelper f("while (1) a = 0;"); |
| 101 | |
| 102 | f.CheckLoopAssignedCount(1, "a"); |
| 103 | f.CheckLoopAssignedCount(0, "b"); |
| 104 | f.CheckLoopAssignedCount(0, "c"); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | TEST(Param2) { |
| 109 | TestHelper f("for (;;) b = 0;"); |
| 110 | |
| 111 | f.CheckLoopAssignedCount(0, "a"); |
| 112 | f.CheckLoopAssignedCount(1, "b"); |
| 113 | f.CheckLoopAssignedCount(0, "c"); |
| 114 | } |
| 115 | |
| 116 | |
| 117 | TEST(Param2b) { |
| 118 | TestHelper f("a; b; c; for (;;) b = 0;"); |
| 119 | |
| 120 | f.CheckLoopAssignedCount(0, "a"); |
| 121 | f.CheckLoopAssignedCount(1, "b"); |
| 122 | f.CheckLoopAssignedCount(0, "c"); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | TEST(Param3) { |
| 127 | TestHelper f("for(x in 0) c = 0;"); |
| 128 | |
| 129 | f.CheckLoopAssignedCount(0, "a"); |
| 130 | f.CheckLoopAssignedCount(0, "b"); |
| 131 | f.CheckLoopAssignedCount(1, "c"); |
| 132 | } |
| 133 | |
| 134 | |
| 135 | TEST(Param3b) { |
| 136 | TestHelper f("a; b; c; for(x in 0) c = 0;"); |
| 137 | |
| 138 | f.CheckLoopAssignedCount(0, "a"); |
| 139 | f.CheckLoopAssignedCount(0, "b"); |
| 140 | f.CheckLoopAssignedCount(1, "c"); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | TEST(NestedLoop1) { |
| 145 | TestHelper f("while (x) { while (x) { var x = 0; } }"); |
| 146 | |
| 147 | f.CheckLoopAssignedCount(2, "x"); |
| 148 | } |
| 149 | |
| 150 | |
| 151 | TEST(NestedLoop2) { |
| 152 | TestHelper f("while (0) { while (0) { var x = 0; } }"); |
| 153 | |
| 154 | f.CheckLoopAssignedCount(2, "x"); |
| 155 | } |
| 156 | |
| 157 | |
| 158 | TEST(NestedLoop3) { |
| 159 | TestHelper f("while (0) { var y = 1; while (0) { var x = 0; } }"); |
| 160 | |
| 161 | f.CheckLoopAssignedCount(2, "x"); |
| 162 | f.CheckLoopAssignedCount(1, "y"); |
| 163 | } |
| 164 | |
| 165 | |
| 166 | TEST(NestedInc1) { |
| 167 | const char* loops[] = { |
| 168 | "while (1) a(b++);", |
| 169 | "while (1) a(0, b++);", |
| 170 | "while (1) a(0, 0, b++);", |
| 171 | "while (1) a(b++, 1, 1);", |
| 172 | "while (1) a(++b);", |
| 173 | "while (1) a + (b++);", |
| 174 | "while (1) (b++) + a;", |
| 175 | "while (1) a + c(b++);", |
| 176 | "while (1) throw b++;", |
| 177 | "while (1) switch (b++) {} ;", |
| 178 | "while (1) switch (a) {case (b++): 0; } ;", |
| 179 | "while (1) switch (a) {case b: b++; } ;", |
| 180 | "while (1) a == (b++);", |
| 181 | "while (1) a === (b++);", |
| 182 | "while (1) +(b++);", |
| 183 | "while (1) ~(b++);", |
| 184 | "while (1) new a(b++);", |
| 185 | "while (1) (b++).f;", |
| 186 | "while (1) a[b++];", |
| 187 | "while (1) (b++)();", |
| 188 | "while (1) [b++];", |
| 189 | "while (1) [0,b++];", |
| 190 | "while (1) var y = [11,b++,12];", |
| 191 | "while (1) var y = {f:11,g:(b++),h:12};", |
| 192 | "while (1) try {b++;} finally {};", |
| 193 | "while (1) try {} finally {b++};", |
| 194 | "while (1) try {b++;} catch (e) {};", |
| 195 | "while (1) try {} catch (e) {b++};", |
| 196 | "while (1) return b++;", |
| 197 | "while (1) (b++) ? b : b;", |
| 198 | "while (1) b ? (b++) : b;", |
| 199 | "while (1) b ? b : (b++);", |
| 200 | }; |
| 201 | |
| 202 | for (size_t i = 0; i < arraysize(loops); i++) { |
| 203 | TestHelper f(loops[i]); |
| 204 | f.CheckLoopAssignedCount(1, "b"); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | |
| 209 | TEST(NestedAssign1) { |
| 210 | const char* loops[] = { |
| 211 | "while (1) a(b=1);", |
| 212 | "while (1) a(0, b=1);", |
| 213 | "while (1) a(0, 0, b=1);", |
| 214 | "while (1) a(b=1, 1, 1);", |
| 215 | "while (1) a + (b=1);", |
| 216 | "while (1) (b=1) + a;", |
| 217 | "while (1) a + c(b=1);", |
| 218 | "while (1) throw b=1;", |
| 219 | "while (1) switch (b=1) {} ;", |
| 220 | "while (1) switch (a) {case b=1: 0; } ;", |
| 221 | "while (1) switch (a) {case b: b=1; } ;", |
| 222 | "while (1) a == (b=1);", |
| 223 | "while (1) a === (b=1);", |
| 224 | "while (1) +(b=1);", |
| 225 | "while (1) ~(b=1);", |
| 226 | "while (1) new a(b=1);", |
| 227 | "while (1) (b=1).f;", |
| 228 | "while (1) a[b=1];", |
| 229 | "while (1) (b=1)();", |
| 230 | "while (1) [b=1];", |
| 231 | "while (1) [0,b=1];", |
| 232 | "while (1) var z = [11,b=1,12];", |
| 233 | "while (1) var y = {f:11,g:(b=1),h:12};", |
| 234 | "while (1) try {b=1;} finally {};", |
| 235 | "while (1) try {} finally {b=1};", |
| 236 | "while (1) try {b=1;} catch (e) {};", |
| 237 | "while (1) try {} catch (e) {b=1};", |
| 238 | "while (1) return b=1;", |
| 239 | "while (1) (b=1) ? b : b;", |
| 240 | "while (1) b ? (b=1) : b;", |
| 241 | "while (1) b ? b : (b=1);", |
| 242 | }; |
| 243 | |
| 244 | for (size_t i = 0; i < arraysize(loops); i++) { |
| 245 | TestHelper f(loops[i]); |
| 246 | f.CheckLoopAssignedCount(1, "b"); |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | |
| 251 | TEST(NestedLoops3) { |
| 252 | TestHelper f("var x, y, z, w; while (x++) while (y++) while (z++) ; w;"); |
| 253 | |
| 254 | f.CheckLoopAssignedCount(1, "x"); |
| 255 | f.CheckLoopAssignedCount(2, "y"); |
| 256 | f.CheckLoopAssignedCount(3, "z"); |
| 257 | f.CheckLoopAssignedCount(0, "w"); |
| 258 | } |
| 259 | |
| 260 | |
| 261 | TEST(NestedLoops3b) { |
| 262 | TestHelper f( |
| 263 | "var x, y, z, w;" |
| 264 | "while (1) { x=1; while (1) { y=1; while (1) z=1; } }" |
| 265 | "w;"); |
| 266 | |
| 267 | f.CheckLoopAssignedCount(1, "x"); |
| 268 | f.CheckLoopAssignedCount(2, "y"); |
| 269 | f.CheckLoopAssignedCount(3, "z"); |
| 270 | f.CheckLoopAssignedCount(0, "w"); |
| 271 | } |
| 272 | |
| 273 | |
| 274 | TEST(NestedLoops3c) { |
| 275 | TestHelper f( |
| 276 | "var x, y, z, w;" |
| 277 | "while (1) {" |
| 278 | " x++;" |
| 279 | " while (1) {" |
| 280 | " y++;" |
| 281 | " while (1) z++;" |
| 282 | " }" |
| 283 | " while (1) {" |
| 284 | " y++;" |
| 285 | " while (1) z++;" |
| 286 | " }" |
| 287 | "}" |
| 288 | "w;"); |
| 289 | |
| 290 | f.CheckLoopAssignedCount(1, "x"); |
| 291 | f.CheckLoopAssignedCount(3, "y"); |
| 292 | f.CheckLoopAssignedCount(5, "z"); |
| 293 | f.CheckLoopAssignedCount(0, "w"); |
| 294 | } |