AArch64: add atomic support parameters to TargetInfo
This allows Clang to detect and deal wih __atomic_* operations properly on
AArch64. Previously we produced an error when encountering them at high
optimisation levels.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175438 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 6f8dfe9..eaf2e7d 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3167,6 +3167,10 @@
WCharType = UnsignedInt;
LongDoubleFormat = &llvm::APFloat::IEEEquad;
+ // AArch64 backend supports 64-bit operations at the moment. In principle
+ // 128-bit is possible if register-pairs are used.
+ MaxAtomicPromoteWidth = MaxAtomicInlineWidth = 64;
+
TheCXXABI.set(TargetCXXABI::GenericAArch64);
}
virtual void getTargetDefines(const LangOptions &Opts,