--- /dev/null
+; RUN: opt -S -passes='loop(indvars)' -verify-scev < %s | FileCheck %s
+
+; REQUIRES: asserts
+; XFAIL: *
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @test_01(i1 %b) {
+; CHECK-LABEL: test_01
+entry:
+ %b.ext = zext i1 %b to i32
+ %zero = and i32 %b.ext, 2
+ %precond = icmp ne i32 %zero, 0
+ call void @llvm.assume(i1 %precond)
+ br label %loop
+
+loop:
+ %iv = phi i16 [ 0, %entry ], [ %iv.next, %loop ]
+ %iv.next = add i16 %iv, 1
+ %cond = icmp slt i16 %iv, 1
+ br i1 %cond, label %loop, label %exit
+
+exit:
+ ret void
+}
+
+define void @test_02() {
+; CHECK-LABEL: test_02
+entry:
+ %tmp = and i1 false, undef
+ br i1 %tmp, label %preheader, label %unreached
+
+preheader: ; preds = %entry
+ br label %loop
+
+loop: ; preds = %loop, %preheader
+ %tmp3 = phi i32 [ 2, %preheader ], [ %tmp4, %loop ]
+ %tmp4 = add nuw nsw i32 %tmp3, 1
+ %tmp5 = icmp ugt i32 %tmp3, 74
+ br i1 %tmp5, label %unreached, label %loop
+
+unreached: ; preds = %loop
+ unreachable
+}
+
+declare void @llvm.assume(i1)