new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27981 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/IndVarsSimplify/complex-scev.ll b/test/Transforms/IndVarsSimplify/complex-scev.ll
new file mode 100644 (file)
index 0000000..2311f20
--- /dev/null
+++ b/test/Transforms/IndVarsSimplify/complex-scev.ll
@@ -0,0 +1,28 @@
+; The i induction variable looks like a wrap-around, but it really is just
+; a simple affine IV.  Make sure that indvars eliminates it.
+
+; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep phi | wc -l | grep 1
+
+void %foo() {
+entry:
+       br label %bb6
+
+bb6:           ; preds = %cond_true, %entry
+       %j.0 = phi int [ 1, %entry ], [ %tmp5, %cond_true ]             ; <int> [#uses=3]
+       %i.0 = phi int [ 0, %entry ], [ %j.0, %cond_true ]              ; <int> [#uses=1]
+       %tmp7 = call int (...)* %foo2( )                ; <int> [#uses=1]
+       %tmp = setne int %tmp7, 0               ; <bool> [#uses=1]
+       br bool %tmp, label %cond_true, label %return
+
+cond_true:             ; preds = %bb6
+       %tmp2 = call int (...)* %bar( int %i.0, int %j.0 )              ; <int> [#uses=0]
+       %tmp5 = add int %j.0, 1         ; <int> [#uses=1]
+       br label %bb6
+
+return:                ; preds = %bb6
+       ret void
+}
+
+declare int %bar(...)
+
+declare int %foo2(...)