1 files changed, 48 insertions, 0 deletions
diff --git a/polly/test/ForwardOpTree/noforward_partial.ll b/polly/test/ForwardOpTree/noforward_partial.ll
new file mode 100644
index 00000000000..ac49266b825
--- /dev/null
+++ b/polly/test/ForwardOpTree/noforward_partial.ll
@@ -0,0 +1,48 @@
+; RUN: opt %loadPolly -polly-optree -analyze < %s | FileCheck %s -match-full-lines
+;
+; Not the entire operand tree can be forwarded,
+; some scalar dependencies would remain.
+;
+; for (int j = 0; j < n; j += 1) {
+; bodyA:
+;   double val = f() + 21.0;
+;
+; bodyB:
+;   A[0] = val;
+; }
+;
+declare double @f(...) #1
+
+define void @func(i32 %n, double* noalias nonnull %A) {
+entry:
+  br label %for
+
+for:
+  %j = phi i32 [0, %entry], [%j.inc, %inc]
+  %j.cmp = icmp slt i32 %j, %n
+  br i1 %j.cmp, label %bodyA, label %exit
+
+    bodyA:
+      %v = call double (...) @f()
+      %val = fadd double %v, 21.0
+      br label %bodyB
+
+    bodyB:
+      store double %val, double* %A
+      br label %inc
+
+inc:
+  %j.inc = add nuw nsw i32 %j, 1
+  br label %for
+
+exit:
+  br label %return
+
+return:
+  ret void
+}
+
+attributes #1 = { nounwind readnone }
+
+
+; CHECK: ForwardOpTree executed, but did not modify anything