ART: Remove vestiges of GCC

We no longer support GCC.

Change-Id: I869ac6e5dcb166747e45236a0d313c7672bbf2de
Test: m test-art-host

7 files changed, 30 insertions, 105 deletions

diff --git a/runtime/base/histogram-inl.h b/runtime/base/histogram-inl.h
index 4af47d170a..ca9a694144 100644
--- a/runtime/base/histogram-inl.h
+++ b/runtime/base/histogram-inl.h
@@ -228,10 +228,8 @@ inline void Histogram<Value>::CreateHistogram(CumulativeData* out_data) const {
   DCHECK_LE(std::abs(out_data->perc_.back() - 1.0), 0.001);
 }
 
-#if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wfloat-equal"
-#endif
 
 template <class Value>
 inline double Histogram<Value>::Percentile(double per, const CumulativeData& data) const {
@@ -273,9 +271,7 @@ inline double Histogram<Value>::Percentile(double per, const CumulativeData& dat
   return value;
 }
 
-#if defined(__clang__)
 #pragma clang diagnostic pop
-#endif
 
 }  // namespace art
 #endif  // ART_RUNTIME_BASE_HISTOGRAM_INL_H_
diff --git a/runtime/base/macros.h b/runtime/base/macros.h
index 5a50247f5a..0ec6e6de97 100644
--- a/runtime/base/macros.h
+++ b/runtime/base/macros.h
@@ -30,16 +30,8 @@
   _rc; })
 #endif
 
-#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
-
-// C++11 final and override keywords that were introduced in GCC version 4.7.
-#if defined(__clang__) || GCC_VERSION >= 40700
 #define OVERRIDE override
 #define FINAL final
-#else
-#define OVERRIDE
-#define FINAL
-#endif
 
 // Declare a friend relationship in a class with a test. Used rather that FRIEND_TEST to avoid
 // globally importing gtest/gtest.h into the main ART header files.
@@ -158,12 +150,9 @@ char (&ArraySizeHelper(T (&array)[N]))[N];
 #define ALWAYS_INLINE  __attribute__ ((always_inline))
 #endif
 
-#ifdef __clang__
-/* clang doesn't like attributes on lambda functions */
+// clang doesn't like attributes on lambda functions. It would be nice to say:
+//   #define ALWAYS_INLINE_LAMBDA ALWAYS_INLINE
 #define ALWAYS_INLINE_LAMBDA
-#else
-#define ALWAYS_INLINE_LAMBDA ALWAYS_INLINE
-#endif
 
 #define NO_INLINE __attribute__ ((noinline))
 
@@ -228,75 +217,46 @@ template<typename... T> void UNUSED(const T&...) {}
 //
 //  In either case this macro has no effect on runtime behavior and performance
 //  of code.
-#if defined(__clang__) && __cplusplus >= 201103L && defined(__has_warning)
 #if __has_feature(cxx_attributes) && __has_warning("-Wimplicit-fallthrough")
 #define FALLTHROUGH_INTENDED [[clang::fallthrough]]  // NOLINT
 #endif
-#endif
 
 #ifndef FALLTHROUGH_INTENDED
 #define FALLTHROUGH_INTENDED do { } while (0)
 #endif
 
 // Annotalysis thread-safety analysis support.
-#if defined(__SUPPORT_TS_ANNOTATION__) || defined(__clang__)
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)   __attribute__((x))
-#else
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)   // no-op
-#endif
 
-#define ACQUIRED_AFTER(...) THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
-#define ACQUIRED_BEFORE(...) THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
-#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
-#define GUARDED_VAR THREAD_ANNOTATION_ATTRIBUTE__(guarded)
-#define LOCK_RETURNED(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
-#define NO_THREAD_SAFETY_ANALYSIS THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
+#define ACQUIRED_AFTER(...) __attribute__((acquired_after(__VA_ARGS__)))
+#define ACQUIRED_BEFORE(...) __attribute__((acquired_before(__VA_ARGS__)))
+#define GUARDED_BY(x) __attribute__((guarded_by(x)))
+#define GUARDED_VAR __attribute__((guarded))
+#define LOCK_RETURNED(x) __attribute__((lock_returned(x)))
+#define NO_THREAD_SAFETY_ANALYSIS __attribute__((no_thread_safety_analysis))
 #define PT_GUARDED_BY(x)
 // THREAD_ANNOTATION_ATTRIBUTE__(point_to_guarded_by(x))
-#define PT_GUARDED_VAR THREAD_ANNOTATION_ATTRIBUTE__(point_to_guarded)
-#define SCOPED_LOCKABLE THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
-
-#if defined(__clang__)
-#define EXCLUSIVE_LOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(exclusive_lock_function(__VA_ARGS__))
-#define EXCLUSIVE_TRYLOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(exclusive_trylock_function(__VA_ARGS__))
-#define SHARED_LOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(shared_lock_function(__VA_ARGS__))
-#define SHARED_TRYLOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(shared_trylock_function(__VA_ARGS__))
-#define UNLOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(unlock_function(__VA_ARGS__))
-#define REQUIRES(...) THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
-#define SHARED_REQUIRES(...) THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
-#define CAPABILITY(...) THREAD_ANNOTATION_ATTRIBUTE__(capability(__VA_ARGS__))
-#define SHARED_CAPABILITY(...) THREAD_ANNOTATION_ATTRIBUTE__(shared_capability(__VA_ARGS__))
-#define ASSERT_CAPABILITY(...) THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(__VA_ARGS__))
-#define ASSERT_SHARED_CAPABILITY(...) THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(__VA_ARGS__))
-#define RETURN_CAPABILITY(...) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(__VA_ARGS__))
-#define TRY_ACQUIRE(...) THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
-#define TRY_ACQUIRE_SHARED(...) THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
-#define ACQUIRE(...) THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
-#define ACQUIRE_SHARED(...) THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
-#define RELEASE(...) THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
-#define RELEASE_SHARED(...) THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
-#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
-#else
-#define EXCLUSIVE_LOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(exclusive_lock(__VA_ARGS__))
-#define EXCLUSIVE_TRYLOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(exclusive_trylock(__VA_ARGS__))
-#define SHARED_LOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(shared_lock(__VA_ARGS__))
-#define SHARED_TRYLOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(shared_trylock(__VA_ARGS__))
-#define UNLOCK_FUNCTION(...) THREAD_ANNOTATION_ATTRIBUTE__(unlock(__VA_ARGS__))
-#define REQUIRES(...)
-#define SHARED_REQUIRES(...)
-#define CAPABILITY(...)
-#define SHARED_CAPABILITY(...)
-#define ASSERT_CAPABILITY(...)
-#define ASSERT_SHARED_CAPABILITY(...)
-#define RETURN_CAPABILITY(...)
-#define TRY_ACQUIRE(...)
-#define TRY_ACQUIRE_SHARED(...)
-#define ACQUIRE(...)
-#define ACQUIRE_SHARED(...)
-#define RELEASE(...)
-#define RELEASE_SHARED(...)
-#define SCOPED_CAPABILITY
-#endif
+#define PT_GUARDED_VAR __attribute__((point_to_guarded))
+#define SCOPED_LOCKABLE __attribute__((scoped_lockable))
+
+#define EXCLUSIVE_LOCK_FUNCTION(...) __attribute__((exclusive_lock_function(__VA_ARGS__)))
+#define EXCLUSIVE_TRYLOCK_FUNCTION(...) __attribute__((exclusive_trylock_function(__VA_ARGS__)))
+#define SHARED_LOCK_FUNCTION(...) __attribute__((shared_lock_function(__VA_ARGS__)))
+#define SHARED_TRYLOCK_FUNCTION(...) __attribute__((shared_trylock_function(__VA_ARGS__)))
+#define UNLOCK_FUNCTION(...) __attribute__((unlock_function(__VA_ARGS__)))
+#define REQUIRES(...) __attribute__((requires_capability(__VA_ARGS__)))
+#define SHARED_REQUIRES(...) __attribute__((requires_shared_capability(__VA_ARGS__)))
+#define CAPABILITY(...) __attribute__((capability(__VA_ARGS__)))
+#define SHARED_CAPABILITY(...) __attribute__((shared_capability(__VA_ARGS__)))
+#define ASSERT_CAPABILITY(...) __attribute__((assert_capability(__VA_ARGS__)))
+#define ASSERT_SHARED_CAPABILITY(...) __attribute__((assert_shared_capability(__VA_ARGS__)))
+#define RETURN_CAPABILITY(...) __attribute__((lock_returned(__VA_ARGS__)))
+#define TRY_ACQUIRE(...) __attribute__((try_acquire_capability(__VA_ARGS__)))
+#define TRY_ACQUIRE_SHARED(...) __attribute__((try_acquire_shared_capability(__VA_ARGS__)))
+#define ACQUIRE(...) __attribute__((acquire_capability(__VA_ARGS__)))
+#define ACQUIRE_SHARED(...) __attribute__((acquire_shared_capability(__VA_ARGS__)))
+#define RELEASE(...) __attribute__((release_capability(__VA_ARGS__)))
+#define RELEASE_SHARED(...) __attribute__((release_shared_capability(__VA_ARGS__)))
+#define SCOPED_CAPABILITY __attribute__((scoped_lockable))
 
 #define LOCKABLE CAPABILITY("mutex")
 #define SHARED_LOCKABLE SHARED_CAPABILITY("mutex")
diff --git a/runtime/base/mutex.cc b/runtime/base/mutex.cc
index 264a530a36..fec918b681 100644
--- a/runtime/base/mutex.cc
+++ b/runtime/base/mutex.cc
@@ -98,12 +98,7 @@ class ScopedAllMutexesLock FINAL {
   }
 
   ~ScopedAllMutexesLock() {
-#if !defined(__clang__)
-    // TODO: remove this workaround target GCC/libc++/bionic bug "invalid failure memory model".
-    while (!gAllMutexData->all_mutexes_guard.CompareExchangeWeakSequentiallyConsistent(mutex_, 0)) {
-#else
     while (!gAllMutexData->all_mutexes_guard.CompareExchangeWeakRelease(mutex_, 0)) {
-#endif
       NanoSleep(100);
     }
   }
diff --git a/runtime/entrypoints/quick/quick_math_entrypoints.cc b/runtime/entrypoints/quick/quick_math_entrypoints.cc
index 1c658b7057..51d2784fd8 100644
--- a/runtime/entrypoints/quick/quick_math_entrypoints.cc
+++ b/runtime/entrypoints/quick/quick_math_entrypoints.cc
@@ -18,10 +18,8 @@
 
 namespace art {
 
-#if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wfloat-equal"
-#endif
 
 int CmplFloat(float a, float b) {
   if (a == b) {
@@ -67,9 +65,7 @@ int CmplDouble(double a, double b) {
   return -1;
 }
 
-#if defined(__clang__)
 #pragma clang diagnostic pop
-#endif
 
 extern "C" int64_t artLmul(int64_t a, int64_t b) {
   return a * b;
diff --git a/runtime/interpreter/interpreter_switch_impl.cc b/runtime/interpreter/interpreter_switch_impl.cc
index dd10052ebd..136814f69e 100644
--- a/runtime/interpreter/interpreter_switch_impl.cc
+++ b/runtime/interpreter/interpreter_switch_impl.cc
@@ -624,10 +624,8 @@ JValue ExecuteSwitchImpl(Thread* self, const DexFile::CodeItem* code_item,
         break;
       }
 
-#if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wfloat-equal"
-#endif
 
       case Instruction::CMPL_FLOAT: {
         PREAMBLE();
@@ -695,9 +693,7 @@ JValue ExecuteSwitchImpl(Thread* self, const DexFile::CodeItem* code_item,
         break;
       }
 
-#if defined(__clang__)
 #pragma clang diagnostic pop
-#endif
 
       case Instruction::CMP_LONG: {
         PREAMBLE();
diff --git a/runtime/stack.h b/runtime/stack.h
index cf33ae1a6a..850d2a4fa8 100644
--- a/runtime/stack.h
+++ b/runtime/stack.h
@@ -224,7 +224,6 @@ class ShadowFrame {
   int64_t GetVRegLong(size_t i) const {
     DCHECK_LT(i, NumberOfVRegs());
     const uint32_t* vreg = &vregs_[i];
-    // Alignment attribute required for GCC 4.8
     typedef const int64_t unaligned_int64 __attribute__ ((aligned (4)));
     return *reinterpret_cast<unaligned_int64*>(vreg);
   }
@@ -232,7 +231,6 @@ class ShadowFrame {
   double GetVRegDouble(size_t i) const {
     DCHECK_LT(i, NumberOfVRegs());
     const uint32_t* vreg = &vregs_[i];
-    // Alignment attribute required for GCC 4.8
     typedef const double unaligned_double __attribute__ ((aligned (4)));
     return *reinterpret_cast<unaligned_double*>(vreg);
   }
@@ -289,7 +287,6 @@ class ShadowFrame {
   void SetVRegLong(size_t i, int64_t val) {
     DCHECK_LT(i, NumberOfVRegs());
     uint32_t* vreg = &vregs_[i];
-    // Alignment attribute required for GCC 4.8
     typedef int64_t unaligned_int64 __attribute__ ((aligned (4)));
     *reinterpret_cast<unaligned_int64*>(vreg) = val;
     // This is needed for moving collectors since these can update the vreg references if they
@@ -303,7 +300,6 @@ class ShadowFrame {
   void SetVRegDouble(size_t i, double val) {
     DCHECK_LT(i, NumberOfVRegs());
     uint32_t* vreg = &vregs_[i];
-    // Alignment attribute required for GCC 4.8
     typedef double unaligned_double __attribute__ ((aligned (4)));
     *reinterpret_cast<unaligned_double*>(vreg) = val;
     // This is needed for moving collectors since these can update the vreg references if they
diff --git a/runtime/utils.h b/runtime/utils.h
index 84079e2fb2..693e0b87ee 100644
--- a/runtime/utils.h
+++ b/runtime/utils.h
@@ -380,21 +380,7 @@ int64_t GetFileSizeBytes(const std::string& filename);
 NO_RETURN void SleepForever();
 
 inline void FlushInstructionCache(char* begin, char* end) {
-  // Only use __builtin___clear_cache with Clang or with GCC >= 4.3.0
-  // (__builtin___clear_cache was introduced in GCC 4.3.0).
-#if defined(__clang__) || GCC_VERSION >= 40300
   __builtin___clear_cache(begin, end);
-#else
-  // Only warn on non-Intel platforms, as x86 and x86-64 do not need
-  // cache flush instructions, as long as the "code uses the same
-  // linear address for modifying and fetching the instruction". See
-  // "Intel(R) 64 and IA-32 Architectures Software Developer's Manual
-  // Volume 3A: System Programming Guide, Part 1", section 11.6
-  // "Self-Modifying Code".
-#if !defined(__i386__) && !defined(__x86_64__)
-  UNIMPLEMENTED(WARNING) << "cache flush";
-#endif
-#endif
 }
 
 }  // namespace art