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-rw-r--r--include/llvm/Support/DataTypes.h.in3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/Support/DataTypes.h.in b/include/llvm/Support/DataTypes.h.in
index 512b349e73..b02eb03d05 100644
--- a/include/llvm/Support/DataTypes.h.in
+++ b/include/llvm/Support/DataTypes.h.in
@@ -105,6 +105,9 @@ typedef signed int ssize_t;
#define INT32_MAX 2147483647
#define INT32_MIN -2147483648
#define UINT32_MAX 4294967295U
+#if !defined(INT64_C)
+# define INT64_C(val) val##LL
+#endif
#endif /* _MSC_VER */
/* Set defaults for constants which we cannot find. */