Add testcases for PR4538, PR4537, and PR4534.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75533 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/ScalarEvolution/avoid-infinite-recursion-0.ll b/test/Analysis/ScalarEvolution/avoid-infinite-recursion-0.ll
new file mode 100644
index 0000000..3fe0336
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/avoid-infinite-recursion-0.ll
@@ -0,0 +1,30 @@
+; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output
+; PR4537
+
+; ModuleID = 'b.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i32 @test() {
+entry:
+ %0 = load i32** undef, align 8 ; <i32*> [#uses=1]
+ %1 = ptrtoint i32* %0 to i64 ; <i64> [#uses=1]
+ %2 = sub i64 undef, %1 ; <i64> [#uses=1]
+ %3 = lshr i64 %2, 3 ; <i64> [#uses=1]
+ %4 = trunc i64 %3 to i32 ; <i32> [#uses=2]
+ br i1 undef, label %bb10, label %bb4.i
+
+bb4.i: ; preds = %bb4.i, %entry
+ %i.0.i6 = phi i32 [ %8, %bb4.i ], [ 0, %entry ] ; <i32> [#uses=2]
+ %5 = sub i32 %4, %i.0.i6 ; <i32> [#uses=1]
+ %6 = sext i32 %5 to i64 ; <i64> [#uses=1]
+ %7 = udiv i64 undef, %6 ; <i64> [#uses=1]
+ %8 = add i32 %i.0.i6, 1 ; <i32> [#uses=2]
+ %phitmp = icmp eq i64 %7, 0 ; <i1> [#uses=1]
+ %.not.i = icmp sge i32 %8, %4 ; <i1> [#uses=1]
+ %or.cond.i = or i1 %phitmp, %.not.i ; <i1> [#uses=1]
+ br i1 %or.cond.i, label %bb10, label %bb4.i
+
+bb10: ; preds = %bb4.i, %entry
+ unreachable
+}