Add checkevent intrinsic to check if any resources owned by the current thread

can event.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127741 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/XCore/events.ll

@@ -2,6 +2,7 @@
 
 declare void @llvm.xcore.setv.p1i8(i8 addrspace(1)* %r, i8* %p)
 declare i8* @llvm.xcore.waitevent()
+declare i8* @llvm.xcore.checkevent(i8*)
 declare void @llvm.xcore.clre()
 
 define i32 @f(i8 addrspace(1)* %r) nounwind {
@@ -22,3 +23,22 @@ ret:
   %retval = phi i32 [1, %L1], [2, %L2]
   ret i32 %retval
 }
+
+define i32 @g(i8 addrspace(1)* %r) nounwind {
+; CHECK: g:
+entry:
+; CHECK: clre
+  call void @llvm.xcore.clre()
+  call void @llvm.xcore.setv.p1i8(i8 addrspace(1)* %r, i8* blockaddress(@f, %L1))
+  %goto_addr = call i8* @llvm.xcore.checkevent(i8 *blockaddress(@f, %L2))
+; CHECK: setsr 1
+; CHECK: clrsr 1
+  indirectbr i8* %goto_addr, [label %L1, label %L2]
+L1:
+  br label %ret
+L2:
+  br label %ret
+ret:
+  %retval = phi i32 [1, %L1], [2, %L2]
+  ret i32 %retval
+}