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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -disable-output -passes=print-mustexecute %s 2>&1 | FileCheck %s3 4; In general the CFG below is easily simplified but this is useful for5; pass ordering issue elimination.6define i1 @const_cond(i32 %high) {7; CHECK-LABEL: @const_cond(8; CHECK-NEXT: entry:9; CHECK-NEXT: br label [[LOOP:%.*]]10; CHECK: loop:11; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ] ; (mustexec in: loop)12; CHECK-NEXT: br i1 true, label [[NEXT:%.*]], label [[NEVER1:%.*]] ; (mustexec in: loop)13; CHECK: next:14; CHECK-NEXT: br i1 false, label [[NEVER2:%.*]], label [[BACKEDGE]] ; (mustexec in: loop)15; CHECK: backedge:16; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1 ; (mustexec in: loop)17; CHECK-NEXT: [[EXIT_TEST:%.*]] = icmp slt i32 [[IV]], [[HIGH:%.*]] ; (mustexec in: loop)18; CHECK-NEXT: br i1 [[EXIT_TEST]], label [[LOOP]], label [[EXIT:%.*]] ; (mustexec in: loop)19; CHECK: exit:20; CHECK-NEXT: ret i1 false21; CHECK: never1:22; CHECK-NEXT: unreachable23; CHECK: never2:24; CHECK-NEXT: unreachable25;26entry:27 br label %loop28 29loop:30 %iv = phi i32 [0, %entry], [%iv.next, %backedge]31 br i1 true, label %next, label %never132next:33 br i1 false, label %never2, label %backedge34backedge:35 %iv.next = add nsw nuw i32 %iv, 136 %exit.test = icmp slt i32 %iv, %high37 br i1 %exit.test, label %loop, label %exit38 39exit:40 ret i1 false41never1:42 unreachable43never2:44 unreachable45}46 47