1 files changed, 27 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/sle.ll b/test/Analysis/ScalarEvolution/sle.ll
new file mode 100644
index 0000000000000..f38f6b63dce4e
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/sle.ll
@@ -0,0 +1,27 @@
+; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
+
+; ScalarEvolution should be able to use nsw information to prove that
+; this loop has a finite trip count.
+
+; CHECK: @le
+; CHECK: Loop %for.body: backedge-taken count is %n
+; CHECK: Loop %for.body: max backedge-taken count is 9223372036854775807
+
+define void @le(i64 %n, double* nocapture %p) nounwind {
+entry:
+  %cmp6 = icmp slt i64 %n, 0                      ; <i1> [#uses=1]
+  br i1 %cmp6, label %for.end, label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %i = phi i64 [ %i.next, %for.body ], [ 0, %entry ] ; <i64> [#uses=2]
+  %arrayidx = getelementptr double* %p, i64 %i    ; <double*> [#uses=2]
+  %t4 = load double* %arrayidx                    ; <double> [#uses=1]
+  %mul = fmul double %t4, 2.200000e+00            ; <double> [#uses=1]
+  store double %mul, double* %arrayidx
+  %i.next = add nsw i64 %i, 1                     ; <i64> [#uses=2]
+  %cmp = icmp sgt i64 %i.next, %n                 ; <i1> [#uses=1]
+  br i1 %cmp, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void
+}