diff options
Diffstat (limited to 'lib/Basic/Targets.cpp')
| -rw-r--r-- | lib/Basic/Targets.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp index 648ed73f0f..889518bb2a 100644 --- a/lib/Basic/Targets.cpp +++ b/lib/Basic/Targets.cpp @@ -1984,6 +1984,11 @@ public: RealTypeUsesObjCFPRet = ((1 << TargetInfo::Float) | (1 << TargetInfo::Double) | (1 << TargetInfo::LongDouble)); + + // x86-32 has atomics up to 8 bytes + // FIXME: Check that we actually have cmpxchg8b before setting + // MaxAtomicInlineWidth. (cmpxchg8b is an i586 instruction.) + MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64; } virtual const char *getVAListDeclaration() const { return "typedef char* __builtin_va_list;"; @@ -2219,6 +2224,12 @@ public: // Use fpret only for long double. RealTypeUsesObjCFPRet = (1 << TargetInfo::LongDouble); + + // x86-64 has atomics up to 16 bytes. + // FIXME: Once the backend is fixed, increase MaxAtomicInlineWidth to 128 + // on CPUs with cmpxchg16b + MaxAtomicPromoteWidth = 128; + MaxAtomicInlineWidth = 64; } virtual const char *getVAListDeclaration() const { return "typedef struct __va_list_tag {" @@ -2391,6 +2402,10 @@ public: // ARM targets default to using the ARM C++ ABI. CXXABI = CXXABI_ARM; + + // ARM has atomics up to 8 bytes + // FIXME: Set MaxAtomicInlineWidth if we have the feature v6e + MaxAtomicPromoteWidth = 64; } virtual const char *getABI() const { return ABI.c_str(); } virtual bool setABI(const std::string &Name) { @@ -2708,6 +2723,9 @@ public: DarwinARMTargetInfo(const std::string& triple) : DarwinTargetInfo<ARMTargetInfo>(triple) { HasAlignMac68kSupport = true; + // iOS always has 64-bit atomic instructions. + // FIXME: This should be based off of the target features in ARMTargetInfo. + MaxAtomicInlineWidth = 64; } }; } // end anonymous namespace. |