test: Switch to new atomic instructions

This fixes the test with recent versions of LLVM that do not support
the old atomic instructions any more.

llvm-svn: 145402
diff --git a/polly/test/CodeGen/loop_with_condition_ineq.ll b/polly/test/CodeGen/loop_with_condition_ineq.ll
index 046eede..1bc936e 100644
--- a/polly/test/CodeGen/loop_with_condition_ineq.ll
+++ b/polly/test/CodeGen/loop_with_condition_ineq.ll
@@ -9,7 +9,7 @@
 
 define void @loop_with_condition_ineq() nounwind {
 ; <label>:0
-  call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
+  fence seq_cst
   br label %1
 
 ; <label>:1                                       ; preds = %7, %0
@@ -41,12 +41,10 @@
   br label %1
 
 ; <label>:8                                       ; preds = %1
-  call void @llvm.memory.barrier(i1 true, i1 true, i1 true, i1 true, i1 false)
+  fence seq_cst
   ret void
 }
 
-declare void @llvm.memory.barrier(i1, i1, i1, i1, i1) nounwind
-
 define i32 @main() nounwind {
 ; <label>:0
   call void @llvm.memset.p0i8.i64(i8* bitcast ([1024 x i32]* @A to i8*), i8 0, i64 4096, i32 1, i1 false)