1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=irce < %s -S | FileCheck %s 3; RUN: opt -passes='require<branch-prob>,irce' < %s -S | FileCheck %s 4 5; REQUIRES: asserts 6 7; IRCE creates the pre and post loop, and invokes the 8; canonicalizing these loops to LCSSA and loop-simplfy structure. Make sure that the update to the loopinfo does not 9; incorrectly change the header while canonicalizing these pre/post loops. We 10; were incorrectly updating LI when the split loop is a subloop as in the case below. 11source_filename = "correct-loop-info.ll" 12 13define void @baz() personality ptr @ham { 14; CHECK-LABEL: @baz( 15; CHECK-NEXT: bb: 16; CHECK-NEXT: [[EXIT_PRELOOP_AT:%.*]] = call i32 @llvm.smax.i32(i32 undef, i32 -1) 17; CHECK-NEXT: [[EXIT_MAINLOOP_AT:%.*]] = call i32 @llvm.smax.i32(i32 undef, i32 0) 18; CHECK-NEXT: br label [[OUTERHEADER:%.*]] 19; CHECK: outerheader: 20; CHECK-NEXT: [[TMP:%.*]] = icmp slt i32 undef, 84 21; CHECK-NEXT: br i1 [[TMP]], label [[BB2:%.*]], label [[BB16:%.*]] 22; CHECK: bb2: 23; CHECK-NEXT: [[TMP0:%.*]] = icmp slt i32 undef, [[EXIT_PRELOOP_AT]] 24; CHECK-NEXT: br i1 [[TMP0]], label [[INNERHEADER_PRELOOP_PREHEADER:%.*]], label [[PRELOOP_PSEUDO_EXIT:%.*]] 25; CHECK: innerheader.preloop.preheader: 26; CHECK-NEXT: br label [[INNERHEADER_PRELOOP:%.*]] 27; CHECK: mainloop: 28; CHECK-NEXT: [[TMP1:%.*]] = icmp slt i32 [[INDVAR_END:%.*]], [[EXIT_MAINLOOP_AT]] 29; CHECK-NEXT: br i1 [[TMP1]], label [[INNERHEADER_PREHEADER:%.*]], label [[MAIN_PSEUDO_EXIT:%.*]] 30; CHECK: innerheader.preheader: 31; CHECK-NEXT: br label [[INNERHEADER:%.*]] 32; CHECK: innerheader: 33; CHECK-NEXT: [[TMP4:%.*]] = phi i32 [ [[TMP6:%.*]], [[BB8:%.*]] ], [ [[TMP4_PRELOOP_COPY:%.*]], [[INNERHEADER_PREHEADER]] ] 34; CHECK-NEXT: invoke void @pluto() 35; CHECK-NEXT: to label [[BB5:%.*]] unwind label [[OUTER_EXITING_LOOPEXIT_SPLIT_LP_LOOPEXIT_SPLIT_LP:%.*]] 36; CHECK: bb5: 37; CHECK-NEXT: [[TMP6]] = add nsw i32 [[TMP4]], 1 38; CHECK-NEXT: [[TMP7:%.*]] = icmp slt i32 [[TMP6]], 1 39; CHECK-NEXT: br i1 true, label [[BB8]], label [[EXIT3_LOOPEXIT5:%.*]] 40; CHECK: bb8: 41; CHECK-NEXT: [[TMP9:%.*]] = icmp slt i32 [[TMP6]], 84 42; CHECK-NEXT: [[TMP2:%.*]] = icmp slt i32 [[TMP6]], [[EXIT_MAINLOOP_AT]] 43; CHECK-NEXT: br i1 [[TMP2]], label [[INNERHEADER]], label [[MAIN_EXIT_SELECTOR:%.*]] 44; CHECK: main.exit.selector: 45; CHECK-NEXT: [[TMP6_LCSSA:%.*]] = phi i32 [ [[TMP6]], [[BB8]] ] 46; CHECK-NEXT: [[TMP3:%.*]] = icmp slt i32 [[TMP6_LCSSA]], 84 47; CHECK-NEXT: br i1 [[TMP3]], label [[MAIN_PSEUDO_EXIT]], label [[BB13:%.*]] 48; CHECK: main.pseudo.exit: 49; CHECK-NEXT: [[TMP4_COPY:%.*]] = phi i32 [ [[TMP4_PRELOOP_COPY]], [[MAINLOOP:%.*]] ], [ [[TMP6_LCSSA]], [[MAIN_EXIT_SELECTOR]] ] 50; CHECK-NEXT: [[INDVAR_END1:%.*]] = phi i32 [ [[INDVAR_END]], [[MAINLOOP]] ], [ [[TMP6_LCSSA]], [[MAIN_EXIT_SELECTOR]] ] 51; CHECK-NEXT: br label [[POSTLOOP:%.*]] 52; CHECK: outer_exiting.loopexit: 53; CHECK-NEXT: [[LPAD_LOOPEXIT:%.*]] = landingpad { ptr, i32 } 54; CHECK-NEXT: cleanup 55; CHECK-NEXT: br label [[OUTER_EXITING:%.*]] 56; CHECK: outer_exiting.loopexit.split-lp.loopexit: 57; CHECK-NEXT: [[LPAD_LOOPEXIT2:%.*]] = landingpad { ptr, i32 } 58; CHECK-NEXT: cleanup 59; CHECK-NEXT: br label [[OUTER_EXITING_LOOPEXIT_SPLIT_LP:%.*]] 60; CHECK: outer_exiting.loopexit.split-lp.loopexit.split-lp: 61; CHECK-NEXT: [[LPAD_LOOPEXIT_SPLIT_LP3:%.*]] = landingpad { ptr, i32 } 62; CHECK-NEXT: cleanup 63; CHECK-NEXT: br label [[OUTER_EXITING_LOOPEXIT_SPLIT_LP]] 64; CHECK: outer_exiting.loopexit.split-lp: 65; CHECK-NEXT: br label [[OUTER_EXITING]] 66; CHECK: outer_exiting: 67; CHECK-NEXT: switch i32 undef, label [[EXIT2:%.*]] [ 68; CHECK-NEXT: i32 142, label [[BB14:%.*]] 69; CHECK-NEXT: i32 448, label [[EXIT:%.*]] 70; CHECK-NEXT: ] 71; CHECK: exit3.loopexit: 72; CHECK-NEXT: br label [[EXIT3:%.*]] 73; CHECK: exit3.loopexit4: 74; CHECK-NEXT: br label [[EXIT3]] 75; CHECK: exit3.loopexit5: 76; CHECK-NEXT: br label [[EXIT3]] 77; CHECK: exit3: 78; CHECK-NEXT: ret void 79; CHECK: bb13.loopexit: 80; CHECK-NEXT: br label [[BB13]] 81; CHECK: bb13: 82; CHECK-NEXT: unreachable 83; CHECK: bb14: 84; CHECK-NEXT: br label [[OUTERHEADER]] 85; CHECK: exit: 86; CHECK-NEXT: ret void 87; CHECK: bb16: 88; CHECK-NEXT: ret void 89; CHECK: exit2: 90; CHECK-NEXT: ret void 91; CHECK: innerheader.preloop: 92; CHECK-NEXT: [[TMP4_PRELOOP:%.*]] = phi i32 [ [[TMP6_PRELOOP:%.*]], [[BB8_PRELOOP:%.*]] ], [ undef, [[INNERHEADER_PRELOOP_PREHEADER]] ] 93; CHECK-NEXT: invoke void @pluto() 94; CHECK-NEXT: to label [[BB5_PRELOOP:%.*]] unwind label [[OUTER_EXITING_LOOPEXIT:%.*]] 95; CHECK: bb5.preloop: 96; CHECK-NEXT: [[TMP6_PRELOOP]] = add i32 [[TMP4_PRELOOP]], 1 97; CHECK-NEXT: [[TMP7_PRELOOP:%.*]] = icmp slt i32 [[TMP6_PRELOOP]], 1 98; CHECK-NEXT: br i1 [[TMP7_PRELOOP]], label [[BB8_PRELOOP]], label [[EXIT3_LOOPEXIT:%.*]] 99; CHECK: bb8.preloop: 100; CHECK-NEXT: [[TMP9_PRELOOP:%.*]] = icmp slt i32 [[TMP6_PRELOOP]], 84 101; CHECK-NEXT: [[TMP4:%.*]] = icmp slt i32 [[TMP6_PRELOOP]], [[EXIT_PRELOOP_AT]] 102; CHECK-NEXT: br i1 [[TMP4]], label [[INNERHEADER_PRELOOP]], label [[PRELOOP_EXIT_SELECTOR:%.*]], !llvm.loop [[LOOP0:![0-9]+]], !loop_constrainer.loop.clone [[META5:![0-9]+]] 103; CHECK: preloop.exit.selector: 104; CHECK-NEXT: [[TMP6_PRELOOP_LCSSA:%.*]] = phi i32 [ [[TMP6_PRELOOP]], [[BB8_PRELOOP]] ] 105; CHECK-NEXT: [[TMP5:%.*]] = icmp slt i32 [[TMP6_PRELOOP_LCSSA]], 84 106; CHECK-NEXT: br i1 [[TMP5]], label [[PRELOOP_PSEUDO_EXIT]], label [[BB13]] 107; CHECK: preloop.pseudo.exit: 108; CHECK-NEXT: [[TMP4_PRELOOP_COPY]] = phi i32 [ undef, [[BB2]] ], [ [[TMP6_PRELOOP_LCSSA]], [[PRELOOP_EXIT_SELECTOR]] ] 109; CHECK-NEXT: [[INDVAR_END]] = phi i32 [ undef, [[BB2]] ], [ [[TMP6_PRELOOP_LCSSA]], [[PRELOOP_EXIT_SELECTOR]] ] 110; CHECK-NEXT: br label [[MAINLOOP]] 111; CHECK: postloop: 112; CHECK-NEXT: br label [[INNERHEADER_POSTLOOP:%.*]] 113; CHECK: innerheader.postloop: 114; CHECK-NEXT: [[TMP4_POSTLOOP:%.*]] = phi i32 [ [[TMP6_POSTLOOP:%.*]], [[BB8_POSTLOOP:%.*]] ], [ [[TMP4_COPY]], [[POSTLOOP]] ] 115; CHECK-NEXT: invoke void @pluto() 116; CHECK-NEXT: to label [[BB5_POSTLOOP:%.*]] unwind label [[OUTER_EXITING_LOOPEXIT_SPLIT_LP_LOOPEXIT:%.*]] 117; CHECK: bb5.postloop: 118; CHECK-NEXT: [[TMP6_POSTLOOP]] = add i32 [[TMP4_POSTLOOP]], 1 119; CHECK-NEXT: [[TMP7_POSTLOOP:%.*]] = icmp slt i32 [[TMP6_POSTLOOP]], 1 120; CHECK-NEXT: br i1 [[TMP7_POSTLOOP]], label [[BB8_POSTLOOP]], label [[EXIT3_LOOPEXIT4:%.*]] 121; CHECK: bb8.postloop: 122; CHECK-NEXT: [[TMP9_POSTLOOP:%.*]] = icmp slt i32 [[TMP6_POSTLOOP]], 84 123; CHECK-NEXT: br i1 [[TMP9_POSTLOOP]], label [[INNERHEADER_POSTLOOP]], label [[BB13_LOOPEXIT:%.*]], !llvm.loop [[LOOP6:![0-9]+]], !loop_constrainer.loop.clone [[META5]] 124; 125bb: 126 br label %outerheader 127 128outerheader: ; preds = %bb14, %bb 129 %tmp = icmp slt i32 undef, 84 130 br i1 %tmp, label %bb2, label %bb16 131 132bb2: ; preds = %outerheader 133 br label %innerheader 134 135innerheader: ; preds = %bb8, %bb2 136 %tmp4 = phi i32 [ %tmp6, %bb8 ], [ undef, %bb2 ] 137 invoke void @pluto() 138 to label %bb5 unwind label %outer_exiting 139 140bb5: ; preds = %innerheader 141 %tmp6 = add i32 %tmp4, 1 142 %tmp7 = icmp slt i32 %tmp6, 1 143 br i1 %tmp7, label %bb8, label %exit3 144 145bb8: ; preds = %bb5 146 %tmp9 = icmp slt i32 %tmp6, 84 147 br i1 %tmp9, label %innerheader, label %bb13 148 149outer_exiting: ; preds = %innerheader 150 %tmp11 = landingpad { ptr, i32 } 151 cleanup 152 switch i32 undef, label %exit2 [ 153 i32 142, label %bb14 154 i32 448, label %exit 155 ] 156 157exit3: ; preds = %bb5 158 ret void 159 160bb13: ; preds = %bb8 161 unreachable 162 163bb14: ; preds = %outer_exiting 164 br label %outerheader 165 166exit: ; preds = %outer_exiting 167 ret void 168 169bb16: ; preds = %outerheader 170 ret void 171 172exit2: ; preds = %outer_exiting 173 ret void 174} 175 176declare ptr @ham() 177 178declare void @pluto() 179 180!0 = distinct !{!0, !1, !2, !3, !4} 181!1 = !{!"llvm.loop.unroll.disable"} 182!2 = !{!"llvm.loop.vectorize.enable", i1 false} 183!3 = !{!"llvm.loop.licm_versioning.disable"} 184!4 = !{!"llvm.loop.distribute.enable", i1 false} 185!5 = !{} 186!6 = distinct !{!6, !1, !2, !3, !4} 187