SIISelLowering.cpp: Define _USE_MATH_DEFINES to let M_PI provided on MS <cmath>.

FIXME: Would it be better to move it into configure?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213477 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
index e6c1614eb2766a43050baf2f3140232ea74b1815..b3e3997a30516e74a2a8e90c0706690c372a1f2f 100644 (file)
--- a/lib/Target/R600/SIISelLowering.cpp
+++ b/lib/Target/R600/SIISelLowering.cpp
@@ -12,6 +12,12 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifdef _MSC_VER
+// Provide M_PI.
+#define _USE_MATH_DEFINES
+#include <cmath>
+#endif
+
 #include "SIISelLowering.h"
 #include "AMDGPU.h"
 #include "AMDGPUIntrinsicInfo.h"