[SCEV] [NFC] add testcase for constant range for addrecexpr with nsw flag

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/Analysis/ScalarEvolution/range_nw_flag.ll b/llvm/test/Analysis/ScalarEvolution/range_nw_flag.ll
index 65ecd312e0c..4a520056d76 100644
--- a/llvm/test/Analysis/ScalarEvolution/range_nw_flag.ll
+++ b/llvm/test/Analysis/ScalarEvolution/range_nw_flag.ll
@@ -39,3 +39,22 @@ exit:
   ret void
 }
 
+; CHECK-LABEL: @test-addrec-nsw
+; CHECK: -->  {(-1 + (-10 smin %offset))<nsw>,+,-1}<nsw><%loop> U: [-2147483648,1) S: [-2147483648,1)
+define void @test-addrec-nsw(float* %input, i32 %offset, i32 %numIterations) {
+entry:
+  %cmp = icmp slt i32 %offset, -10 
+  %max = select i1 %cmp, i32 %offset, i32 -10 
+  br label %loop
+loop:
+  %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
+  %nexti = add nsw i32 %i, -1
+  %index32 = add nsw i32 %nexti, %max
+  %ptr = getelementptr inbounds float, float* %input, i32 %index32
+  %f = load float, float* %ptr, align 4
+  %exitcond = icmp eq i32 %nexti, %numIterations
+  br i1 %exitcond, label %exit, label %loop
+
+exit:
+  ret void
+}