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authorTim Northover <Tim.Northover@arm.com>2013-02-18 12:11:32 +0000
committerTim Northover <Tim.Northover@arm.com>2013-02-18 12:11:32 +0000
commit847d2d454944bc56fccb8fbd344e91b6ec678a22 (patch)
tree13f493ff98d01c4ff3e3bc11df2513831629d99f
parenteaf706bef3fba21f522e3c51f6e5f4ae224f1924 (diff)
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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. llvm-svn: 175438
-rw-r--r--clang/lib/Basic/Targets.cpp4
-rw-r--r--clang/test/Sema/atomic-ops.c5
2 files changed, 9 insertions, 0 deletions
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 6f8dfe9b..eaf2e7d0 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -3167,6 +3167,10 @@ public:
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,
diff --git a/clang/test/Sema/atomic-ops.c b/clang/test/Sema/atomic-ops.c
index 2a93591..a33ff2b 100644
--- a/clang/test/Sema/atomic-ops.c
+++ b/clang/test/Sema/atomic-ops.c
@@ -1,4 +1,5 @@
// RUN: %clang_cc1 %s -verify -fsyntax-only -triple=i686-linux-gnu -std=c11
+// RUN: %clang_cc1 %s -verify -fsyntax-only -triple=aarch64-linux-gnu -std=c11
// Basic parsing/Sema tests for __c11_atomic_*
@@ -17,7 +18,11 @@ _Static_assert(__GCC_ATOMIC_WCHAR_T_LOCK_FREE == 2, "");
_Static_assert(__GCC_ATOMIC_SHORT_LOCK_FREE == 2, "");
_Static_assert(__GCC_ATOMIC_INT_LOCK_FREE == 2, "");
_Static_assert(__GCC_ATOMIC_LONG_LOCK_FREE == 2, "");
+#ifdef __i386__
_Static_assert(__GCC_ATOMIC_LLONG_LOCK_FREE == 1, "");
+#else
+_Static_assert(__GCC_ATOMIC_LLONG_LOCK_FREE == 2, "");
+#endif
_Static_assert(__GCC_ATOMIC_POINTER_LOCK_FREE == 2, "");
_Static_assert(__c11_atomic_is_lock_free(1), "");