1 files changed, 62 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/lcssa-crash.ll b/llvm/test/Transforms/LoopVectorize/lcssa-crash.ll
new file mode 100644
index 00000000000..3d3ef9e0593
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/lcssa-crash.ll
@@ -0,0 +1,62 @@
+; RUN: opt < %s  -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 
+
+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-n8:16:32:64-S128"
+
+%type1 = type { %type2 }
+%type2 = type { [0 x i8*], i8**, i32, i32, i32 }
+
+define void @test() nounwind uwtable align 2 {
+  br label %for.body.lr.ph.i.i.i
+
+for.body.lr.ph.i.i.i:
+  br label %for.body.i.i.i
+
+for.body.i.i.i:
+  %indvars.iv = phi i64 [ %indvars.iv.next, %for.inc.i.i.i ], [ 0, %for.body.lr.ph.i.i.i ]
+  br label %for.inc.i.i.i
+
+for.inc.i.i.i:
+  %indvars.iv.next = add i64 %indvars.iv, 1
+  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+  %exitcond = icmp ne i32 %lftr.wideiv, undef
+  br i1 %exitcond, label %for.body.i.i.i, label %for.end.i.i.i
+
+for.end.i.i.i:
+  %lcssa = phi %type1* [ undef, %for.inc.i.i.i ]
+  unreachable
+}
+
+; PR16139
+define void @test2(i8* %x) {
+entry:
+  indirectbr i8* %x, [ label %L0, label %L1 ]
+
+L0:
+  br label %L0
+
+L1:
+  ret void
+}
+
+; This loop has different uniform instructions before and after LCSSA.
+define void @test3() {
+entry:
+  %add41 = add i32 undef, undef
+  %idxprom4736 = zext i32 %add41 to i64
+  br label %while.body
+
+while.body:
+  %idxprom4738 = phi i64 [ %idxprom47, %while.body ], [ %idxprom4736, %entry ]
+  %pos.337 = phi i32 [ %inc46, %while.body ], [ %add41, %entry ]
+  %inc46 = add i32 %pos.337, 1
+  %arrayidx48 = getelementptr inbounds [1024 x i8], [1024 x i8]* undef, i64 0, i64 %idxprom4738
+  store i8 0, i8* %arrayidx48, align 1
+  %and43 = and i32 %inc46, 3
+  %cmp44 = icmp eq i32 %and43, 0
+  %idxprom47 = zext i32 %inc46 to i64
+  br i1 %cmp44, label %while.end, label %while.body
+
+while.end:
+  %add58 = add i32 %inc46, 4
+  ret void
+}