1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -irce < %s -S | FileCheck %s 3 4; REQUIRES: asserts 5 6; IRCE creates the pre and post loop, and invokes the 7; canonicalizing these loops to LCSSA and loop-simplfy structure. Make sure that the update to the loopinfo does not 8; incorrectly change the header while canonicalizing these pre/post loops. We 9; were incorrectly updating LI when the split loop is a subloop as in the case below. 10source_filename = "correct-loop-info.ll" 11 12define void @baz() personality i32* ()* @ham { 13; CHECK-LABEL: @baz( 14; CHECK-NEXT: bb: 15; CHECK-NEXT: br label [[OUTERHEADER:%.*]] 16; CHECK: outerheader: 17; CHECK-NEXT: [[TMP:%.*]] = icmp slt i32 undef, 84 18; CHECK-NEXT: br i1 [[TMP]], label [[BB2:%.*]], label [[BB16:%.*]] 19; CHECK: bb2: 20; CHECK-NEXT: br i1 false, label [[INNERHEADER_PRELOOP_PREHEADER:%.*]], label [[PRELOOP_PSEUDO_EXIT:%.*]] 21; CHECK: innerheader.preloop.preheader: 22; CHECK-NEXT: br label [[INNERHEADER_PRELOOP:%.*]] 23; CHECK: mainloop: 24; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 [[INDVAR_END:%.*]], 0 25; CHECK-NEXT: br i1 [[TMP0]], label [[INNERHEADER_PREHEADER:%.*]], label [[MAIN_PSEUDO_EXIT:%.*]] 26; CHECK: innerheader.preheader: 27; CHECK-NEXT: br label [[INNERHEADER:%.*]] 28; CHECK: innerheader: 29; CHECK-NEXT: [[TMP4:%.*]] = phi i32 [ [[TMP6:%.*]], [[BB8:%.*]] ], [ [[TMP4_PRELOOP_COPY:%.*]], [[INNERHEADER_PREHEADER]] ] 30; CHECK-NEXT: invoke void @pluto() 31; CHECK-NEXT: to label [[BB5:%.*]] unwind label %outer_exiting.loopexit.split-lp.loopexit.split-lp 32; CHECK: bb5: 33; CHECK-NEXT: [[TMP6]] = add i32 [[TMP4]], 1 34; CHECK-NEXT: [[TMP7:%.*]] = icmp slt i32 [[TMP6]], 1 35; CHECK-NEXT: br i1 true, label [[BB8]], label [[EXIT3_LOOPEXIT5:%.*]] 36; CHECK: bb8: 37; CHECK-NEXT: [[TMP9:%.*]] = icmp slt i32 [[TMP6]], 84 38; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[TMP6]], 0 39; CHECK-NEXT: br i1 [[TMP1]], label [[INNERHEADER]], label [[MAIN_EXIT_SELECTOR:%.*]] 40; CHECK: main.exit.selector: 41; CHECK-NEXT: [[TMP6_LCSSA:%.*]] = phi i32 [ [[TMP6]], [[BB8]] ] 42; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP6_LCSSA]], 84 43; CHECK-NEXT: br i1 [[TMP2]], label [[MAIN_PSEUDO_EXIT]], label [[BB13:%.*]] 44; CHECK: main.pseudo.exit: 45; CHECK-NEXT: [[TMP4_COPY:%.*]] = phi i32 [ [[TMP4_PRELOOP_COPY]], [[MAINLOOP:%.*]] ], [ [[TMP6_LCSSA]], [[MAIN_EXIT_SELECTOR]] ] 46; CHECK-NEXT: [[INDVAR_END1:%.*]] = phi i32 [ [[INDVAR_END]], [[MAINLOOP]] ], [ [[TMP6_LCSSA]], [[MAIN_EXIT_SELECTOR]] ] 47; CHECK-NEXT: br label [[POSTLOOP:%.*]] 48; CHECK: outer_exiting.loopexit: 49; CHECK-NEXT: [[LPAD_LOOPEXIT:%.*]] = landingpad { i8*, i32 } 50; CHECK-NEXT: cleanup 51; CHECK-NEXT: br label [[OUTER_EXITING:%.*]] 52; CHECK: outer_exiting.loopexit.split-lp.loopexit: 53; CHECK-NEXT: [[LPAD_LOOPEXIT2:%.*]] = landingpad { i8*, i32 } 54; CHECK-NEXT: cleanup 55; CHECK-NEXT: br label %outer_exiting.loopexit.split-lp 56; CHECK: outer_exiting.loopexit.split-lp.loopexit.split-lp: 57; CHECK-NEXT: %lpad.loopexit.split-lp3 = landingpad { i8*, i32 } 58; CHECK-NEXT: cleanup 59; CHECK-NEXT: br label %outer_exiting.loopexit.split-lp 60; CHECK: outer_exiting.loopexit.split-lp: 61; CHECK-NEXT: br label [[OUTER_EXITING]] 62; CHECK: outer_exiting: 63; CHECK-NEXT: switch i32 undef, label [[EXIT2:%.*]] [ 64; CHECK-NEXT: i32 142, label [[BB14:%.*]] 65; CHECK-NEXT: i32 448, label [[EXIT:%.*]] 66; CHECK-NEXT: ] 67; CHECK: exit3.loopexit: 68; CHECK-NEXT: br label [[EXIT3:%.*]] 69; CHECK: exit3.loopexit4: 70; CHECK-NEXT: br label [[EXIT3]] 71; CHECK: exit3.loopexit5: 72; CHECK-NEXT: br label [[EXIT3]] 73; CHECK: exit3: 74; CHECK-NEXT: ret void 75; CHECK: bb13.loopexit: 76; CHECK-NEXT: br label [[BB13]] 77; CHECK: bb13: 78; CHECK-NEXT: unreachable 79; CHECK: bb14: 80; CHECK-NEXT: br label [[OUTERHEADER]] 81; CHECK: exit: 82; CHECK-NEXT: ret void 83; CHECK: bb16: 84; CHECK-NEXT: ret void 85; CHECK: exit2: 86; CHECK-NEXT: ret void 87; CHECK: innerheader.preloop: 88; CHECK-NEXT: [[TMP4_PRELOOP:%.*]] = phi i32 [ [[TMP6_PRELOOP:%.*]], [[BB8_PRELOOP:%.*]] ], [ undef, [[INNERHEADER_PRELOOP_PREHEADER]] ] 89; CHECK-NEXT: invoke void @pluto() 90; CHECK-NEXT: to label [[BB5_PRELOOP:%.*]] unwind label [[OUTER_EXITING_LOOPEXIT:%.*]] 91; CHECK: bb5.preloop: 92; CHECK-NEXT: [[TMP6_PRELOOP]] = add i32 [[TMP4_PRELOOP]], 1 93; CHECK-NEXT: [[TMP7_PRELOOP:%.*]] = icmp slt i32 [[TMP6_PRELOOP]], 1 94; CHECK-NEXT: br i1 [[TMP7_PRELOOP]], label [[BB8_PRELOOP]], label [[EXIT3_LOOPEXIT:%.*]] 95; CHECK: bb8.preloop: 96; CHECK-NEXT: [[TMP9_PRELOOP:%.*]] = icmp slt i32 [[TMP6_PRELOOP]], 84 97; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP6_PRELOOP]], -1 98; CHECK-NEXT: br i1 [[TMP3]], label [[INNERHEADER_PRELOOP]], label [[PRELOOP_EXIT_SELECTOR:%.*]], !llvm.loop !0, !irce.loop.clone !5 99; CHECK: preloop.exit.selector: 100; CHECK-NEXT: [[TMP6_PRELOOP_LCSSA:%.*]] = phi i32 [ [[TMP6_PRELOOP]], [[BB8_PRELOOP]] ] 101; CHECK-NEXT: [[TMP4:%.*]] = icmp slt i32 [[TMP6_PRELOOP_LCSSA]], 84 102; CHECK-NEXT: br i1 [[TMP4]], label [[PRELOOP_PSEUDO_EXIT]], label [[BB13]] 103; CHECK: preloop.pseudo.exit: 104; CHECK-NEXT: [[TMP4_PRELOOP_COPY]] = phi i32 [ undef, [[BB2]] ], [ [[TMP6_PRELOOP_LCSSA]], [[PRELOOP_EXIT_SELECTOR]] ] 105; CHECK-NEXT: [[INDVAR_END]] = phi i32 [ undef, [[BB2]] ], [ [[TMP6_PRELOOP_LCSSA]], [[PRELOOP_EXIT_SELECTOR]] ] 106; CHECK-NEXT: br label [[MAINLOOP]] 107; CHECK: postloop: 108; CHECK-NEXT: br label [[INNERHEADER_POSTLOOP:%.*]] 109; CHECK: innerheader.postloop: 110; CHECK-NEXT: [[TMP4_POSTLOOP:%.*]] = phi i32 [ [[TMP6_POSTLOOP:%.*]], [[BB8_POSTLOOP:%.*]] ], [ [[TMP4_COPY]], [[POSTLOOP]] ] 111; CHECK-NEXT: invoke void @pluto() 112; CHECK-NEXT: to label [[BB5_POSTLOOP:%.*]] unwind label %outer_exiting.loopexit.split-lp.loopexit 113; CHECK: bb5.postloop: 114; CHECK-NEXT: [[TMP6_POSTLOOP]] = add i32 [[TMP4_POSTLOOP]], 1 115; CHECK-NEXT: [[TMP7_POSTLOOP:%.*]] = icmp slt i32 [[TMP6_POSTLOOP]], 1 116; CHECK-NEXT: br i1 [[TMP7_POSTLOOP]], label [[BB8_POSTLOOP]], label [[EXIT3_LOOPEXIT4:%.*]] 117; CHECK: bb8.postloop: 118; CHECK-NEXT: [[TMP9_POSTLOOP:%.*]] = icmp slt i32 [[TMP6_POSTLOOP]], 84 119; CHECK-NEXT: br i1 [[TMP9_POSTLOOP]], label [[INNERHEADER_POSTLOOP]], label [[BB13_LOOPEXIT:%.*]], !llvm.loop !6, !irce.loop.clone !5 120; 121bb: 122 br label %outerheader 123 124outerheader: ; preds = %bb14, %bb 125 %tmp = icmp slt i32 undef, 84 126 br i1 %tmp, label %bb2, label %bb16 127 128bb2: ; preds = %outerheader 129 br label %innerheader 130 131innerheader: ; preds = %bb8, %bb2 132 %tmp4 = phi i32 [ %tmp6, %bb8 ], [ undef, %bb2 ] 133 invoke void @pluto() 134 to label %bb5 unwind label %outer_exiting 135 136bb5: ; preds = %innerheader 137 %tmp6 = add i32 %tmp4, 1 138 %tmp7 = icmp slt i32 %tmp6, 1 139 br i1 %tmp7, label %bb8, label %exit3 140 141bb8: ; preds = %bb5 142 %tmp9 = icmp slt i32 %tmp6, 84 143 br i1 %tmp9, label %innerheader, label %bb13 144 145outer_exiting: ; preds = %innerheader 146 %tmp11 = landingpad { i8*, i32 } 147 cleanup 148 switch i32 undef, label %exit2 [ 149 i32 142, label %bb14 150 i32 448, label %exit 151 ] 152 153exit3: ; preds = %bb5 154 ret void 155 156bb13: ; preds = %bb8 157 unreachable 158 159bb14: ; preds = %outer_exiting 160 br label %outerheader 161 162exit: ; preds = %outer_exiting 163 ret void 164 165bb16: ; preds = %outerheader 166 ret void 167 168exit2: ; preds = %outer_exiting 169 ret void 170} 171 172declare i32* @ham() 173 174declare void @pluto() 175 176!0 = distinct !{!0, !1, !2, !3, !4} 177!1 = !{!"llvm.loop.unroll.disable"} 178!2 = !{!"llvm.loop.vectorize.enable", i1 false} 179!3 = !{!"llvm.loop.licm_versioning.disable"} 180!4 = !{!"llvm.loop.distribute.enable", i1 false} 181!5 = !{} 182!6 = distinct !{!6, !1, !2, !3, !4} 183