1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes='loop(indvars,loop-deletion),simplifycfg' -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s 3 4; Testcase distilled from 256.bzip2 5define i32 @test1() { 6; CHECK-LABEL: @test1( 7; CHECK-NEXT: entry: 8; CHECK-NEXT: ret i32 364 9; 10entry: 11 br label %loopentry 12 13loopentry: ; preds = %loopentry, %entry 14 %indvar1 = phi i32 [ 0, %entry ], [ %indvar.next2, %loopentry ] ; <i32> [#uses=1] 15 %h.0 = phi i32 [ %tmp.2, %loopentry ], [ 4, %entry ] ; <i32> [#uses=1] 16 %tmp.1 = mul i32 %h.0, 3 ; <i32> [#uses=1] 17 %tmp.2 = add i32 %tmp.1, 1 ; <i32> [#uses=2] 18 %indvar.next2 = add i32 %indvar1, 1 ; <i32> [#uses=2] 19 %exitcond3 = icmp ne i32 %indvar.next2, 4 ; <i1> [#uses=1] 20 br i1 %exitcond3, label %loopentry, label %loopexit 21 22loopexit: ; preds = %loopentry 23 ret i32 %tmp.2 24} 25 26; PR12377 27define i32 @test2(i32 %arg) { 28; CHECK-LABEL: @test2( 29; CHECK-NEXT: bb: 30; CHECK-NEXT: [[TMP:%.*]] = icmp ugt i32 [[ARG:%.*]], 10 31; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[ARG]], -11 32; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[TMP0]], 1 33; CHECK-NEXT: [[TMP2:%.*]] = add nuw i32 [[TMP1]], 1 34; CHECK-NEXT: [[TMP8:%.*]] = select i1 [[TMP]], i32 [[TMP2]], i32 0 35; CHECK-NEXT: ret i32 [[TMP8]] 36; 37bb: 38 %tmp = icmp ugt i32 %arg, 10 39 br i1 %tmp, label %bb1, label %bb7 40 41bb1: ; preds = %bb1, %bb 42 %tmp2 = phi i32 [ %tmp5, %bb1 ], [ 0, %bb ] 43 %tmp3 = phi i32 [ %tmp4, %bb1 ], [ %arg, %bb ] 44 %tmp4 = add i32 %tmp3, -2 45 %tmp5 = add i32 %tmp2, 1 46 %tmp6 = icmp ugt i32 %tmp4, 10 47 br i1 %tmp6, label %bb1, label %bb7 48 49bb7: ; preds = %bb1, %bb 50 %tmp8 = phi i32 [ 0, %bb ], [ %tmp5, %bb1 ] 51 ret i32 %tmp8 52} 53