Differential D27469 Diff 80442 test/Transforms/LoopVersioning/exit-block-dominates-rt-check-block.ll

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				; This test ensures loop versioning does not produce an invalid dominator tree
				; if the exit block of the loop (bb0) dominates the runtime check block
				; (bb1 will become the runtime check block).

				; RUN: opt -loop-versioning -verify-dom-info -S -o - %s > %t
				; RUN: FileCheck -input-file %t %s

				@c1 = external global i16

				define void @f(i16 %a) {
				br label %bb0

				bb0:
				br label %bb1

				bb1:
				%tmp1 = load i16, i16* @c1
				br label %bb2

				bb2:
				%tmp2 = phi i16 [ %tmp1, %bb1 ], [ %tmp3, %bb2 ]
				%tmp4 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 4
				store i32 1, i32* %tmp4
				%tmp5 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 9
				store i32 0, i32* %tmp5
				%tmp3 = add i16 %tmp2, 1
				store i16 %tmp2, i16* @c1
				%tmp6 = icmp sle i16 %tmp3, 0
				br i1 %tmp6, label %bb2, label %bb0
				}

				; Simple check to make sure loop versioning happened.
				; CHECK-LABEL: bb2.lver.check