Testing for Visual Studio 2010 SP1 or greater before calling the _xgetbv intrinsic. This also fixes a minor code formatting issue.

llvm-svn: 178666

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index f91fb37e1da..fef66e634f9 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -113,13 +113,13 @@ static bool GetX86CpuIDAndInfo(unsigned value, unsigned *rEAX,
 }
 
 static bool OSHasAVXSupport() {

-#if defined( __GNUC__ )

+#if defined(__GNUC__)

   // Check xgetbv; this uses a .byte sequence instead of the instruction 

   // directly because older assemblers do not include support for xgetbv and 

   // there is no easy way to conditionally compile based on the assembler used.

   int rEAX, rEDX;

   __asm__ (".byte 0x0f, 0x01, 0xd0" : "=a" (rEAX), "=d" (rEDX) : "c" (0));

-#elif defined(_MSC_VER)

+#elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 160040219

   unsigned long long rEAX = _xgetbv(_XCR_XFEATURE_ENABLED_MASK);

 #else

   int rEAX = 0; // Ensures we return false