test/CodeGen/X86/vec_cast.ll: [PR8311] Add explicit -mtriple=x86_64-linux and -mtriple=x86_64-win32. Thanks to Nadav, it might be fixed in r126424.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127060 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/vec_cast.ll b/test/CodeGen/X86/vec_cast.ll
index 95289c9..90d39d0 100644
--- a/test/CodeGen/X86/vec_cast.ll
+++ b/test/CodeGen/X86/vec_cast.ll
@@ -1,5 +1,5 @@
-; RUN: llc < %s -march=x86-64 -mcpu=core2
-
+; RUN: llc < %s -mtriple=x86_64-linux -mcpu=core2
+; RUN: llc < %s -mtriple=x86_64-win32 -mcpu=core2
 
 define <8 x i32> @a(<8 x i16> %a) nounwind {
   %c = sext <8 x i16> %a to <8 x i32>