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Side by Side Diff: include/v8config.h

Issue 1398643002: Revert of Reland: Introduce a V8_NORETURN macro and use it to make GCC 4.9.2 happy again. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 2 months ago
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1 // Copyright 2013 the V8 project authors. All rights reserved. 1 // Copyright 2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef V8CONFIG_H_ 5 #ifndef V8CONFIG_H_
6 #define V8CONFIG_H_ 6 #define V8CONFIG_H_
7 7
8 // clang-format off 8 // clang-format off
9 9
10 // Platform headers for feature detection below. 10 // Platform headers for feature detection below.
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167 // 167 //
168 // Compiler-specific feature detection 168 // Compiler-specific feature detection
169 // 169 //
170 // V8_HAS___ALIGNOF - __alignof(type) operator supported 170 // V8_HAS___ALIGNOF - __alignof(type) operator supported
171 // V8_HAS___ALIGNOF__ - __alignof__(type) operator supported 171 // V8_HAS___ALIGNOF__ - __alignof__(type) operator supported
172 // V8_HAS_ATTRIBUTE_ALIGNED - __attribute__((aligned(n))) supported 172 // V8_HAS_ATTRIBUTE_ALIGNED - __attribute__((aligned(n))) supported
173 // V8_HAS_ATTRIBUTE_ALWAYS_INLINE - __attribute__((always_inline)) 173 // V8_HAS_ATTRIBUTE_ALWAYS_INLINE - __attribute__((always_inline))
174 // supported 174 // supported
175 // V8_HAS_ATTRIBUTE_DEPRECATED - __attribute__((deprecated)) supported 175 // V8_HAS_ATTRIBUTE_DEPRECATED - __attribute__((deprecated)) supported
176 // V8_HAS_ATTRIBUTE_NOINLINE - __attribute__((noinline)) supported 176 // V8_HAS_ATTRIBUTE_NOINLINE - __attribute__((noinline)) supported
177 // V8_HAS_ATTRIBUTE_NORETURN - __attribute__((noreturn)) supported
178 // V8_HAS_ATTRIBUTE_UNUSED - __attribute__((unused)) supported 177 // V8_HAS_ATTRIBUTE_UNUSED - __attribute__((unused)) supported
179 // V8_HAS_ATTRIBUTE_VISIBILITY - __attribute__((visibility)) supported 178 // V8_HAS_ATTRIBUTE_VISIBILITY - __attribute__((visibility)) supported
180 // V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT - __attribute__((warn_unused_result)) 179 // V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT - __attribute__((warn_unused_result))
181 // supported 180 // supported
182 // V8_HAS_BUILTIN_CLZ - __builtin_clz() supported 181 // V8_HAS_BUILTIN_CLZ - __builtin_clz() supported
183 // V8_HAS_BUILTIN_CTZ - __builtin_ctz() supported 182 // V8_HAS_BUILTIN_CTZ - __builtin_ctz() supported
184 // V8_HAS_BUILTIN_EXPECT - __builtin_expect() supported 183 // V8_HAS_BUILTIN_EXPECT - __builtin_expect() supported
185 // V8_HAS_BUILTIN_FRAME_ADDRESS - __builtin_frame_address() supported 184 // V8_HAS_BUILTIN_FRAME_ADDRESS - __builtin_frame_address() supported
186 // V8_HAS_BUILTIN_POPCOUNT - __builtin_popcount() supported 185 // V8_HAS_BUILTIN_POPCOUNT - __builtin_popcount() supported
187 // V8_HAS_BUILTIN_SADD_OVERFLOW - __builtin_sadd_overflow() supported 186 // V8_HAS_BUILTIN_SADD_OVERFLOW - __builtin_sadd_overflow() supported
188 // V8_HAS_BUILTIN_SSUB_OVERFLOW - __builtin_ssub_overflow() supported 187 // V8_HAS_BUILTIN_SSUB_OVERFLOW - __builtin_ssub_overflow() supported
189 // V8_HAS_BUILTIN_UADD_OVERFLOW - __builtin_uadd_overflow() supported 188 // V8_HAS_BUILTIN_UADD_OVERFLOW - __builtin_uadd_overflow() supported
190 // V8_HAS_DECLSPEC_ALIGN - __declspec(align(n)) supported 189 // V8_HAS_DECLSPEC_ALIGN - __declspec(align(n)) supported
191 // V8_HAS_DECLSPEC_DEPRECATED - __declspec(deprecated) supported 190 // V8_HAS_DECLSPEC_DEPRECATED - __declspec(deprecated) supported
192 // V8_HAS_DECLSPEC_NOINLINE - __declspec(noinline) supported 191 // V8_HAS_DECLSPEC_NOINLINE - __declspec(noinline) supported
193 // V8_HAS_DECLSPEC_SELECTANY - __declspec(selectany) supported 192 // V8_HAS_DECLSPEC_SELECTANY - __declspec(selectany) supported
194 // V8_HAS_DECLSPEC_NORETURN - __declspec(noreturn) supported
195 // V8_HAS___FORCEINLINE - __forceinline supported 193 // V8_HAS___FORCEINLINE - __forceinline supported
196 // 194 //
197 // Note that testing for compilers and/or features must be done using #if 195 // Note that testing for compilers and/or features must be done using #if
198 // not #ifdef. For example, to test for Intel C++ Compiler, use: 196 // not #ifdef. For example, to test for Intel C++ Compiler, use:
199 // #if V8_CC_INTEL 197 // #if V8_CC_INTEL
200 // ... 198 // ...
201 // #endif 199 // #endif
202 200
203 #if defined(__clang__) 201 #if defined(__clang__)
204 202
205 #if defined(__GNUC__) // Clang in gcc mode. 203 #if defined(__GNUC__) // Clang in gcc mode.
206 # define V8_CC_GNU 1 204 # define V8_CC_GNU 1
207 #endif 205 #endif
208 206
209 // Clang defines __alignof__ as alias for __alignof 207 // Clang defines __alignof__ as alias for __alignof
210 # define V8_HAS___ALIGNOF 1 208 # define V8_HAS___ALIGNOF 1
211 # define V8_HAS___ALIGNOF__ V8_HAS___ALIGNOF 209 # define V8_HAS___ALIGNOF__ V8_HAS___ALIGNOF
212 210
213 # define V8_HAS_ATTRIBUTE_ALIGNED (__has_attribute(aligned)) 211 # define V8_HAS_ATTRIBUTE_ALIGNED (__has_attribute(aligned))
214 # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline)) 212 # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (__has_attribute(always_inline))
215 # define V8_HAS_ATTRIBUTE_DEPRECATED (__has_attribute(deprecated)) 213 # define V8_HAS_ATTRIBUTE_DEPRECATED (__has_attribute(deprecated))
216 # define V8_HAS_ATTRIBUTE_NOINLINE (__has_attribute(noinline)) 214 # define V8_HAS_ATTRIBUTE_NOINLINE (__has_attribute(noinline))
217 # define V8_HAS_ATTRIBUTE_NORETURN (__has_attribute(noreturn))
218 # define V8_HAS_ATTRIBUTE_UNUSED (__has_attribute(unused)) 215 # define V8_HAS_ATTRIBUTE_UNUSED (__has_attribute(unused))
219 # define V8_HAS_ATTRIBUTE_VISIBILITY (__has_attribute(visibility)) 216 # define V8_HAS_ATTRIBUTE_VISIBILITY (__has_attribute(visibility))
220 # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \ 217 # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \
221 (__has_attribute(warn_unused_result)) 218 (__has_attribute(warn_unused_result))
222 219
223 # define V8_HAS_BUILTIN_CLZ (__has_builtin(__builtin_clz)) 220 # define V8_HAS_BUILTIN_CLZ (__has_builtin(__builtin_clz))
224 # define V8_HAS_BUILTIN_CTZ (__has_builtin(__builtin_ctz)) 221 # define V8_HAS_BUILTIN_CTZ (__has_builtin(__builtin_ctz))
225 # define V8_HAS_BUILTIN_EXPECT (__has_builtin(__builtin_expect)) 222 # define V8_HAS_BUILTIN_EXPECT (__has_builtin(__builtin_expect))
226 # define V8_HAS_BUILTIN_FRAME_ADDRESS (__has_builtin(__builtin_frame_address)) 223 # define V8_HAS_BUILTIN_FRAME_ADDRESS (__has_builtin(__builtin_frame_address))
227 # define V8_HAS_BUILTIN_POPCOUNT (__has_builtin(__builtin_popcount)) 224 # define V8_HAS_BUILTIN_POPCOUNT (__has_builtin(__builtin_popcount))
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249 # define V8_HAS___ALIGNOF__ (V8_GNUC_PREREQ(4, 3, 0)) 246 # define V8_HAS___ALIGNOF__ (V8_GNUC_PREREQ(4, 3, 0))
250 247
251 # define V8_HAS_ATTRIBUTE_ALIGNED (V8_GNUC_PREREQ(2, 95, 0)) 248 # define V8_HAS_ATTRIBUTE_ALIGNED (V8_GNUC_PREREQ(2, 95, 0))
252 // always_inline is available in gcc 4.0 but not very reliable until 4.4. 249 // always_inline is available in gcc 4.0 but not very reliable until 4.4.
253 // Works around "sorry, unimplemented: inlining failed" build errors with 250 // Works around "sorry, unimplemented: inlining failed" build errors with
254 // older compilers. 251 // older compilers.
255 # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (V8_GNUC_PREREQ(4, 4, 0)) 252 # define V8_HAS_ATTRIBUTE_ALWAYS_INLINE (V8_GNUC_PREREQ(4, 4, 0))
256 # define V8_HAS_ATTRIBUTE_DEPRECATED (V8_GNUC_PREREQ(3, 4, 0)) 253 # define V8_HAS_ATTRIBUTE_DEPRECATED (V8_GNUC_PREREQ(3, 4, 0))
257 # define V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE (V8_GNUC_PREREQ(4, 5, 0)) 254 # define V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE (V8_GNUC_PREREQ(4, 5, 0))
258 # define V8_HAS_ATTRIBUTE_NOINLINE (V8_GNUC_PREREQ(3, 4, 0)) 255 # define V8_HAS_ATTRIBUTE_NOINLINE (V8_GNUC_PREREQ(3, 4, 0))
259 # define V8_HAS_ATTRIBUTE_NORETURN (V8_GNUC_PREREQ(2, 5, 0))
260 # define V8_HAS_ATTRIBUTE_UNUSED (V8_GNUC_PREREQ(2, 95, 0)) 256 # define V8_HAS_ATTRIBUTE_UNUSED (V8_GNUC_PREREQ(2, 95, 0))
261 # define V8_HAS_ATTRIBUTE_VISIBILITY (V8_GNUC_PREREQ(4, 3, 0)) 257 # define V8_HAS_ATTRIBUTE_VISIBILITY (V8_GNUC_PREREQ(4, 3, 0))
262 # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \ 258 # define V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT \
263 (!V8_CC_INTEL && V8_GNUC_PREREQ(4, 1, 0)) 259 (!V8_CC_INTEL && V8_GNUC_PREREQ(4, 1, 0))
264 260
265 # define V8_HAS_BUILTIN_CLZ (V8_GNUC_PREREQ(3, 4, 0)) 261 # define V8_HAS_BUILTIN_CLZ (V8_GNUC_PREREQ(3, 4, 0))
266 # define V8_HAS_BUILTIN_CTZ (V8_GNUC_PREREQ(3, 4, 0)) 262 # define V8_HAS_BUILTIN_CTZ (V8_GNUC_PREREQ(3, 4, 0))
267 # define V8_HAS_BUILTIN_EXPECT (V8_GNUC_PREREQ(2, 96, 0)) 263 # define V8_HAS_BUILTIN_EXPECT (V8_GNUC_PREREQ(2, 96, 0))
268 # define V8_HAS_BUILTIN_FRAME_ADDRESS (V8_GNUC_PREREQ(2, 96, 0)) 264 # define V8_HAS_BUILTIN_FRAME_ADDRESS (V8_GNUC_PREREQ(2, 96, 0))
269 # define V8_HAS_BUILTIN_POPCOUNT (V8_GNUC_PREREQ(3, 4, 0)) 265 # define V8_HAS_BUILTIN_POPCOUNT (V8_GNUC_PREREQ(3, 4, 0))
(...skipping 12 matching lines...) Expand all
282 #endif 278 #endif
283 279
284 #if defined(_MSC_VER) 280 #if defined(_MSC_VER)
285 # define V8_CC_MSVC 1 281 # define V8_CC_MSVC 1
286 # define V8_HAS___ALIGNOF 1 282 # define V8_HAS___ALIGNOF 1
287 283
288 # define V8_HAS_DECLSPEC_ALIGN 1 284 # define V8_HAS_DECLSPEC_ALIGN 1
289 # define V8_HAS_DECLSPEC_DEPRECATED 1 285 # define V8_HAS_DECLSPEC_DEPRECATED 1
290 # define V8_HAS_DECLSPEC_NOINLINE 1 286 # define V8_HAS_DECLSPEC_NOINLINE 1
291 # define V8_HAS_DECLSPEC_SELECTANY 1 287 # define V8_HAS_DECLSPEC_SELECTANY 1
292 # define V8_HAS_DECLSPEC_NORETURN 1
293 288
294 # define V8_HAS___FORCEINLINE 1 289 # define V8_HAS___FORCEINLINE 1
295 290
296 #endif 291 #endif
297 292
298 293
299 // ----------------------------------------------------------------------------- 294 // -----------------------------------------------------------------------------
300 // Helper macros 295 // Helper macros
301 296
302 // A macro used to make better inlining. Don't bother for debug builds. 297 // A macro used to make better inlining. Don't bother for debug builds.
(...skipping 14 matching lines...) Expand all
317 // V8_NOINLINE int GetMinusOne() { return -1; } 312 // V8_NOINLINE int GetMinusOne() { return -1; }
318 #if !defined(DEBUG) && V8_HAS_ATTRIBUTE_NOINLINE 313 #if !defined(DEBUG) && V8_HAS_ATTRIBUTE_NOINLINE
319 # define V8_NOINLINE __attribute__((noinline)) 314 # define V8_NOINLINE __attribute__((noinline))
320 #elif !defined(DEBUG) && V8_HAS_DECLSPEC_NOINLINE 315 #elif !defined(DEBUG) && V8_HAS_DECLSPEC_NOINLINE
321 # define V8_NOINLINE __declspec(noinline) 316 # define V8_NOINLINE __declspec(noinline)
322 #else 317 #else
323 # define V8_NOINLINE /* NOT SUPPORTED */ 318 # define V8_NOINLINE /* NOT SUPPORTED */
324 #endif 319 #endif
325 320
326 321
327 // A macro used to tell the compiler that a particular function never returns.
328 // Use like:
329 // V8_NORETURN void MyAbort() { abort(); }
330 #if V8_HAS_ATTRIBUTE_NORETURN
331 # define V8_NORETURN __attribute__((noreturn))
332 #elif HAS_DECLSPEC_NORETURN
333 # define V8_NORETURN __declspec(noreturn)
334 #else
335 # define V8_NORETURN /* NOT SUPPORTED */
336 #endif
337
338
339 // A macro (V8_DEPRECATED) to mark classes or functions as deprecated. 322 // A macro (V8_DEPRECATED) to mark classes or functions as deprecated.
340 #if defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE 323 #if defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED_MESSAGE
341 #define V8_DEPRECATED(message, declarator) \ 324 #define V8_DEPRECATED(message, declarator) \
342 declarator __attribute__((deprecated(message))) 325 declarator __attribute__((deprecated(message)))
343 #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED 326 #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_ATTRIBUTE_DEPRECATED
344 #define V8_DEPRECATED(message, declarator) \ 327 #define V8_DEPRECATED(message, declarator) \
345 declarator __attribute__((deprecated)) 328 declarator __attribute__((deprecated))
346 #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_DECLSPEC_DEPRECATED 329 #elif defined(V8_DEPRECATION_WARNINGS) && V8_HAS_DECLSPEC_DEPRECATED
347 #define V8_DEPRECATED(message, declarator) __declspec(deprecated) declarator 330 #define V8_DEPRECATED(message, declarator) __declspec(deprecated) declarator
348 #else 331 #else
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432 // int foo() WARN_UNUSED_RESULT; 415 // int foo() WARN_UNUSED_RESULT;
433 #if V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT 416 #if V8_HAS_ATTRIBUTE_WARN_UNUSED_RESULT
434 #define V8_WARN_UNUSED_RESULT __attribute__((warn_unused_result)) 417 #define V8_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
435 #else 418 #else
436 #define V8_WARN_UNUSED_RESULT /* NOT SUPPORTED */ 419 #define V8_WARN_UNUSED_RESULT /* NOT SUPPORTED */
437 #endif 420 #endif
438 421
439 // clang-format on 422 // clang-format on
440 423
441 #endif // V8CONFIG_H_ 424 #endif // V8CONFIG_H_
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