1 files changed, 49 insertions, 0 deletions
diff --git a/llvm/test/Analysis/ScalarEvolution/exact-exit-count-more-precise.ll b/llvm/test/Analysis/ScalarEvolution/exact-exit-count-more-precise.ll
new file mode 100644
index 00000000000..8b1f878b1c0
--- /dev/null
+++ b/llvm/test/Analysis/ScalarEvolution/exact-exit-count-more-precise.ll
@@ -0,0 +1,49 @@
+; RUN: opt -analyze -scalar-evolution %s | FileCheck %s
+
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @test_and(i16 %in) {
+  br label %bb2
+
+bb2:                                              ; preds = %bb1.i, %bb2, %0
+  %_tmp44.i = icmp slt i16 %in, 2
+  br i1 %_tmp44.i, label %bb1.i, label %bb2
+
+bb1.i:                                            ; preds = %bb1.i, %bb2
+  %_tmp25.i = phi i16 [ %in, %bb2 ], [ %_tmp6.i, %bb1.i ]
+  %_tmp6.i = add nsw i16 %_tmp25.i, 1
+  %_tmp10.i = icmp sge i16 %_tmp6.i, 2
+  %exitcond.i = icmp eq i16 %_tmp6.i, 2
+  %or.cond = and i1 %_tmp10.i, %exitcond.i
+  br i1 %or.cond, label %bb2, label %bb1.i
+}
+
+; CHECK-LABEL: Determining loop execution counts for: @test_and
+; CHECK-NEXT: Loop %bb1.i: backedge-taken count is (1 + (-1 * %in))
+; CHECK-NEXT: Loop %bb1.i: max backedge-taken count is -1
+; CHECK-NEXT: Loop %bb1.i: Predicated backedge-taken count is (1 + (-1 * %in))
+
+
+define void @test_or() {
+  %C10 = icmp slt i1 undef, undef
+  br i1 %C10, label %BB, label %exit
+
+BB:                                               ; preds = %BB, %0
+  %indvars.iv = phi i64 [ -1, %BB ], [ -1, %0 ]
+  %sum.01 = phi i32 [ %2, %BB ], [ undef, %0 ]
+  %1 = trunc i64 %indvars.iv to i32
+  %2 = add nsw i32 %1, %sum.01
+  %B3 = add i32 %1, %2
+  %C11 = icmp ult i32 %2, %1
+  %C5 = icmp sle i32 %1, %B3
+  %B = or i1 %C5, %C11
+  br i1 %B, label %BB, label %exit
+
+exit:                                      ; preds = %BB, %0
+  ret void
+}
+
+; CHECK-LABEL: Determining loop execution counts for: @test_or
+; CHECK-NEXT: Loop %BB: backedge-taken count is undef
+; CHECK-NEXT: Loop %BB: max backedge-taken count is -1
+; CHECK-NEXT: Loop %BB: Predicated backedge-taken count is undef