NEw "feature" test that cee should eventually handle

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4053 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/CorrelatedExprs/looptest.ll b/test/Transforms/CorrelatedExprs/looptest.ll
new file mode 100644 (file)
index 0000000..3af0814
--- /dev/null
+++ b/test/Transforms/CorrelatedExprs/looptest.ll
@@ -0,0 +1,44 @@
+; This testcase tests to see if adds and PHI's are handled in their full 
+; generality.  This testcase comes from the following C code:
+;
+; void f() {
+;   int i;
+;   for (i = 1; i < 100; i++) {
+;     if (i)
+;       g();
+;   }
+; }
+;
+; Note that this is a "feature" test, not a correctness test.
+;
+; RUN: if as < %s | opt -cee -simplifycfg | dis | grep cond213
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+;
+implementation   ; Functions:
+
+declare void %g()
+
+void %f() {
+bb0:           ; No predecessors!
+       br label %bb2
+
+bb2:           ; preds = %bb4, %bb0
+       %cann-indvar = phi int [ 0, %bb0 ], [ %add1-indvar, %bb4 ]              ; <int> [#uses=2]
+       %add1-indvar = add int %cann-indvar, 1          ; <int> [#uses=2]
+       %cond213 = seteq int %add1-indvar, 0            ; <bool> [#uses=1]
+       br bool %cond213, label %bb4, label %bb3
+
+bb3:           ; preds = %bb2
+       call void %g( )
+       br label %bb4
+
+bb4:           ; preds = %bb3, %bb2
+       %reg109 = add int %cann-indvar, 2               ; <int> [#uses=1]
+       %cond217 = setle int %reg109, 99                ; <bool> [#uses=1]
+       br bool %cond217, label %bb2, label %bb5
+
+bb5:           ; preds = %bb4
+       ret void
+}