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1; This test ensures loop versioning does not produce an invalid dominator tree2; if the exit block of the loop (bb0) dominates the runtime check block3; (bb1 will become the runtime check block).4 5; RUN: opt -passes=loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t6; RUN: opt -passes=loop-simplify,loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t7; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s8 9; RUN: opt -passes=loop-versioning -verify-dom-info -S -o - %s > %t10; RUN: opt -passes=loop-simplify,loop-versioning -verify-dom-info -S -o - %s > %t11; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s12 13@c1 = external global i1614 15define void @f(i16 %a) {16 br label %bb017 18bb0:19 br label %bb120 21bb1:22 %tmp1 = load i16, ptr @c123 br label %bb224 25bb2:26 %tmp2 = phi i16 [ %tmp1, %bb1 ], [ %tmp3, %bb2 ]27 %tmp4 = getelementptr inbounds [1 x i32], ptr undef, i32 0, i32 428 store i32 1, ptr %tmp429 %tmp5 = getelementptr inbounds [1 x i32], ptr undef, i32 0, i32 930 store i32 0, ptr %tmp531 %tmp3 = add i16 %tmp2, 132 store i16 %tmp2, ptr @c133 %tmp6 = icmp sle i16 %tmp3, 034 br i1 %tmp6, label %bb2, label %bb035}36 37; Simple check to make sure loop versioning happened.38; CHECK-VERSIONING: bb2.lver.check:39