Add another Strong-SIV testcase.

llvm-svn: 78446

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/Analysis/LoopDependenceAnalysis/siv-strong.ll b/llvm/test/Analysis/LoopDependenceAnalysis/siv-strong.ll
index 3b9bba5d8e2..7b9296edc6e 100644
--- a/llvm/test/Analysis/LoopDependenceAnalysis/siv-strong.ll
+++ b/llvm/test/Analysis/LoopDependenceAnalysis/siv-strong.ll
@@ -80,3 +80,31 @@ for.body:
 for.end:
   ret void
 }
+
+;; for (i = 0; i < 10; i++)
+;;   x[10*i+1] = x[10*i] + y[i]
+
+define void @f4(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %i.10 = mul i64 %i, 10
+  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i.10
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i.10
+  %i.10.1 = add i64 %i.10, 1
+  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i.10.1
+  %x = load i32* %x.ld.addr     ; 0
+  %y = load i32* %y.ld.addr     ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.st.addr ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 10
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}