1 files changed, 46 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/pr22222.ll b/test/Transforms/IndVarSimplify/pr22222.ll
new file mode 100644
index 0000000..ccdfe53
--- /dev/null
+++ b/test/Transforms/IndVarSimplify/pr22222.ll
@@ -0,0 +1,46 @@
+; RUN: opt -indvars -S < %s | FileCheck %s
+
+@b = common global i32 0, align 4
+@c = common global i32 0, align 4
+@a = common global i32 0, align 4
+
+declare void @abort() #1
+
+; Function Attrs: nounwind ssp uwtable
+define i32 @main() {
+entry:
+  %a.promoted13 = load i32* @a, align 4
+  br label %for.cond1.preheader
+
+for.cond1.preheader:                              ; preds = %entry, %for.end
+  %or.lcssa14 = phi i32 [ %a.promoted13, %entry ], [ %or.lcssa, %for.end ]
+  %d.010 = phi i32 [ 1, %entry ], [ 0, %for.end ]
+  br label %for.body3
+
+for.body3:                                        ; preds = %for.cond1.preheader, %for.body3
+  %inc12 = phi i32 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+  %or11 = phi i32 [ %or.lcssa14, %for.cond1.preheader ], [ %or, %for.body3 ]
+; CHECK-NOT: sub nuw i32 %inc12, %d.010
+; CHECK: sub i32 %inc12, %d.010
+  %add = sub i32 %inc12, %d.010
+  %or = or i32 %or11, %add
+  %inc = add i32 %inc12, 1
+  br i1 false, label %for.body3, label %for.end
+
+for.end:                                          ; preds = %for.body3
+  %or.lcssa = phi i32 [ %or, %for.body3 ]
+  br i1 false, label %for.cond1.preheader, label %for.end6
+
+for.end6:                                         ; preds = %for.end
+  %or.lcssa.lcssa = phi i32 [ %or.lcssa, %for.end ]
+  store i32 %or.lcssa.lcssa, i32* @a, align 4
+  %cmp7 = icmp eq i32 %or.lcssa.lcssa, -1
+  br i1 %cmp7, label %if.end, label %if.then
+
+if.then:                                          ; preds = %for.end6
+  tail call void @abort() #2
+  unreachable
+
+if.end:                                           ; preds = %for.end6
+  ret i32 0
+}