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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; PR235243; The test is to check redundency produced by loop unroll pass4; should be cleaned up by later pass.5; RUN: opt < %s -O2 -S | FileCheck %s6 7; After loop unroll:8; %dec18 = add nsw i32 %dec18.in, -19; ...10; %dec18.1 = add nsw i32 %dec18, -111; should be merged to:12; %dec18.1 = add nsw i32 %dec18.in, -213;14 15; ModuleID = '<stdin>'16target triple = "x86_64-unknown-linux-gnu"17 18@b = global i32 0, align 419@c = global i32 0, align 420 21; Function Attrs: nounwind uwtable22define void @_Z3fn1v(ptr %r, ptr %a) #0 {23; CHECK-LABEL: define void @_Z3fn1v(24; CHECK-SAME: ptr writeonly captures(none) [[R:%.*]], ptr readonly captures(none) [[A:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {25; CHECK-NEXT: [[ENTRY:.*]]:26; CHECK-NEXT: [[T:%.*]] = load i32, ptr @b, align 427; CHECK-NEXT: [[TOBOOL20:%.*]] = icmp eq i32 [[T]], 028; CHECK-NEXT: br i1 [[TOBOOL20]], label %[[FOR_END6:.*]], label %[[FOR_BODY:.*]]29; CHECK: [[FOR_COND_LOOPEXIT_LOOPEXIT:.*]]:30; CHECK-NEXT: [[ADD_PTR_LCSSA:%.*]] = phi ptr [ [[ADD_PTR_LCSSA_UNR:%.*]], %[[FOR_BODY3_PROL_LOOPEXIT:.*]] ], [ [[ADD_PTR_1:%.*]], %[[FOR_INC_1:.*]] ]31; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A_021:%.*]], i64 132; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[T2:%.*]], -133; CHECK-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i6434; CHECK-NEXT: [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[SCEVGEP:%.*]], i64 [[TMP1]]35; CHECK-NEXT: [[T1_PRE:%.*]] = load i32, ptr @b, align 436; CHECK-NEXT: br label %[[FOR_COND_LOOPEXIT:.*]]37; CHECK: [[FOR_COND_LOOPEXIT]]:38; CHECK-NEXT: [[T1:%.*]] = phi i32 [ [[T12:%.*]], %[[FOR_BODY]] ], [ [[T1_PRE]], %[[FOR_COND_LOOPEXIT_LOOPEXIT]] ]39; CHECK-NEXT: [[R_1_LCSSA:%.*]] = phi ptr [ [[R_022:%.*]], %[[FOR_BODY]] ], [ [[ADD_PTR_LCSSA]], %[[FOR_COND_LOOPEXIT_LOOPEXIT]] ]40; CHECK-NEXT: [[A_1_LCSSA:%.*]] = phi ptr [ [[A_021:%.*]], %[[FOR_BODY]] ], [ [[SCEVGEP1]], %[[FOR_COND_LOOPEXIT_LOOPEXIT]] ]41; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[T1]], 042; CHECK-NEXT: br i1 [[TOBOOL]], label %[[FOR_END6]], label %[[FOR_BODY]]43; CHECK: [[FOR_BODY]]:44; CHECK-NEXT: [[T12]] = phi i32 [ [[T1]], %[[FOR_COND_LOOPEXIT]] ], [ [[T]], %[[ENTRY]] ]45; CHECK-NEXT: [[R_022]] = phi ptr [ [[R_1_LCSSA]], %[[FOR_COND_LOOPEXIT]] ], [ [[R]], %[[ENTRY]] ]46; CHECK-NEXT: [[A_021]] = phi ptr [ [[A_1_LCSSA]], %[[FOR_COND_LOOPEXIT]] ], [ [[A]], %[[ENTRY]] ]47; CHECK-NEXT: [[T2]] = load i32, ptr @c, align 448; CHECK-NEXT: [[TOBOOL215:%.*]] = icmp eq i32 [[T2]], 049; CHECK-NEXT: br i1 [[TOBOOL215]], label %[[FOR_COND_LOOPEXIT]], label %[[FOR_BODY3_PREHEADER:.*]]50; CHECK: [[FOR_BODY3_PREHEADER]]:51; CHECK-NEXT: [[XTRAITER:%.*]] = and i32 [[T2]], 152; CHECK-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i32 [[XTRAITER]], 053; CHECK-NEXT: br i1 [[LCMP_MOD_NOT]], label %[[FOR_BODY3_PROL_LOOPEXIT]], label %[[FOR_BODY3_PROL:.*]]54; CHECK: [[FOR_BODY3_PROL]]:55; CHECK-NEXT: [[DEC18_PROL:%.*]] = add nsw i32 [[T2]], -156; CHECK-NEXT: [[T3_PROL:%.*]] = load i8, ptr [[A_021]], align 157; CHECK-NEXT: [[CMP_PROL:%.*]] = icmp eq i8 [[T3_PROL]], 058; CHECK-NEXT: br i1 [[CMP_PROL]], label %[[IF_THEN_PROL:.*]], label %[[FOR_INC_PROL:.*]]59; CHECK: [[IF_THEN_PROL]]:60; CHECK-NEXT: [[ARRAYIDX_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[R_022]], i64 261; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX_PROL]], align 262; CHECK-NEXT: store i16 0, ptr [[R_022]], align 263; CHECK-NEXT: [[ARRAYIDX5_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[R_022]], i64 464; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX5_PROL]], align 265; CHECK-NEXT: br label %[[FOR_INC_PROL]]66; CHECK: [[FOR_INC_PROL]]:67; CHECK-NEXT: [[INCDEC_PTR_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[A_021]], i64 168; CHECK-NEXT: [[ADD_PTR_PROL:%.*]] = getelementptr inbounds nuw i8, ptr [[R_022]], i64 669; CHECK-NEXT: br label %[[FOR_BODY3_PROL_LOOPEXIT]]70; CHECK: [[FOR_BODY3_PROL_LOOPEXIT]]:71; CHECK-NEXT: [[ADD_PTR_LCSSA_UNR]] = phi ptr [ poison, %[[FOR_BODY3_PREHEADER]] ], [ [[ADD_PTR_PROL]], %[[FOR_INC_PROL]] ]72; CHECK-NEXT: [[DEC18_IN_UNR:%.*]] = phi i32 [ [[T2]], %[[FOR_BODY3_PREHEADER]] ], [ [[DEC18_PROL]], %[[FOR_INC_PROL]] ]73; CHECK-NEXT: [[R_117_UNR:%.*]] = phi ptr [ [[R_022]], %[[FOR_BODY3_PREHEADER]] ], [ [[ADD_PTR_PROL]], %[[FOR_INC_PROL]] ]74; CHECK-NEXT: [[A_116_UNR:%.*]] = phi ptr [ [[A_021]], %[[FOR_BODY3_PREHEADER]] ], [ [[INCDEC_PTR_PROL]], %[[FOR_INC_PROL]] ]75; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32 [[T2]], 176; CHECK-NEXT: br i1 [[TMP2]], label %[[FOR_COND_LOOPEXIT_LOOPEXIT]], label %[[FOR_BODY3:.*]]77; CHECK: [[FOR_BODY3]]:78; CHECK-NEXT: [[DEC18_IN:%.*]] = phi i32 [ [[DEC18_1:%.*]], %[[FOR_INC_1]] ], [ [[DEC18_IN_UNR]], %[[FOR_BODY3_PROL_LOOPEXIT]] ]79; CHECK-NEXT: [[R_117:%.*]] = phi ptr [ [[ADD_PTR_1]], %[[FOR_INC_1]] ], [ [[R_117_UNR]], %[[FOR_BODY3_PROL_LOOPEXIT]] ]80; CHECK-NEXT: [[A_116:%.*]] = phi ptr [ [[INCDEC_PTR_1:%.*]], %[[FOR_INC_1]] ], [ [[A_116_UNR]], %[[FOR_BODY3_PROL_LOOPEXIT]] ]81; CHECK-NEXT: [[T3:%.*]] = load i8, ptr [[A_116]], align 182; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[T3]], 083; CHECK-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[FOR_INC:.*]]84; CHECK: [[IF_THEN]]:85; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 286; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX]], align 287; CHECK-NEXT: store i16 0, ptr [[R_117]], align 288; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 489; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX5]], align 290; CHECK-NEXT: br label %[[FOR_INC]]91; CHECK: [[FOR_INC]]:92; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw i8, ptr [[A_116]], i64 193; CHECK-NEXT: [[DEC18_1]] = add nsw i32 [[DEC18_IN]], -294; CHECK-NEXT: [[T3_1:%.*]] = load i8, ptr [[INCDEC_PTR]], align 195; CHECK-NEXT: [[CMP_1:%.*]] = icmp eq i8 [[T3_1]], 096; CHECK-NEXT: br i1 [[CMP_1]], label %[[IF_THEN_1:.*]], label %[[FOR_INC_1]]97; CHECK: [[IF_THEN_1]]:98; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 699; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 8100; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX_1]], align 2101; CHECK-NEXT: store i16 0, ptr [[ADD_PTR]], align 2102; CHECK-NEXT: [[ARRAYIDX5_1:%.*]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 10103; CHECK-NEXT: store i16 0, ptr [[ARRAYIDX5_1]], align 2104; CHECK-NEXT: br label %[[FOR_INC_1]]105; CHECK: [[FOR_INC_1]]:106; CHECK-NEXT: [[INCDEC_PTR_1]] = getelementptr inbounds nuw i8, ptr [[A_116]], i64 2107; CHECK-NEXT: [[ADD_PTR_1]] = getelementptr inbounds nuw i8, ptr [[R_117]], i64 12108; CHECK-NEXT: [[TOBOOL2_1:%.*]] = icmp eq i32 [[DEC18_1]], 0109; CHECK-NEXT: br i1 [[TOBOOL2_1]], label %[[FOR_COND_LOOPEXIT_LOOPEXIT]], label %[[FOR_BODY3]], !llvm.loop [[LOOP0:![0-9]+]]110; CHECK: [[FOR_END6]]:111; CHECK-NEXT: ret void112;113entry:114 %t = load i32, ptr @b, align 4115 %tobool20 = icmp eq i32 %t, 0116 br i1 %tobool20, label %for.end6, label %for.body.lr.ph117 118for.body.lr.ph: ; preds = %entry119 br label %for.body120 121for.cond1.for.cond.loopexit_crit_edge: ; preds = %for.inc122 %add.ptr.lcssa = phi ptr [ %add.ptr, %for.inc ]123 %incdec.ptr.lcssa = phi ptr [ %incdec.ptr, %for.inc ]124 br label %for.cond.loopexit125 126for.cond.loopexit: ; preds = %for.body, %for.cond1.for.cond.loopexit_crit_edge127 %r.1.lcssa = phi ptr [ %add.ptr.lcssa, %for.cond1.for.cond.loopexit_crit_edge ], [ %r.022, %for.body ]128 %a.1.lcssa = phi ptr [ %incdec.ptr.lcssa, %for.cond1.for.cond.loopexit_crit_edge ], [ %a.021, %for.body ]129 %t1 = load i32, ptr @b, align 4130 %tobool = icmp eq i32 %t1, 0131 br i1 %tobool, label %for.cond.for.end6_crit_edge, label %for.body132 133for.body: ; preds = %for.cond.loopexit, %for.body.lr.ph134 %r.022 = phi ptr [ %r, %for.body.lr.ph ], [ %r.1.lcssa, %for.cond.loopexit ]135 %a.021 = phi ptr [ %a, %for.body.lr.ph ], [ %a.1.lcssa, %for.cond.loopexit ]136 %t2 = load i32, ptr @c, align 4137 %tobool215 = icmp eq i32 %t2, 0138 br i1 %tobool215, label %for.cond.loopexit, label %for.body3.lr.ph139 140for.body3.lr.ph: ; preds = %for.body141 br label %for.body3142 143for.body3: ; preds = %for.inc, %for.body3.lr.ph144 %dec18.in = phi i32 [ %t2, %for.body3.lr.ph ], [ %dec18, %for.inc ]145 %r.117 = phi ptr [ %r.022, %for.body3.lr.ph ], [ %add.ptr, %for.inc ]146 %a.116 = phi ptr [ %a.021, %for.body3.lr.ph ], [ %incdec.ptr, %for.inc ]147 %dec18 = add nsw i32 %dec18.in, -1148 %t3 = load i8, ptr %a.116, align 1149 %cmp = icmp eq i8 %t3, 0150 br i1 %cmp, label %if.then, label %for.inc151 152if.then: ; preds = %for.body3153 %arrayidx = getelementptr inbounds i16, ptr %r.117, i64 1154 store i16 0, ptr %arrayidx, align 2155 store i16 0, ptr %r.117, align 2156 %arrayidx5 = getelementptr inbounds i16, ptr %r.117, i64 2157 store i16 0, ptr %arrayidx5, align 2158 br label %for.inc159 160for.inc: ; preds = %if.then, %for.body3161 %incdec.ptr = getelementptr inbounds i8, ptr %a.116, i64 1162 %add.ptr = getelementptr inbounds i16, ptr %r.117, i64 3163 %tobool2 = icmp eq i32 %dec18, 0164 br i1 %tobool2, label %for.cond1.for.cond.loopexit_crit_edge, label %for.body3, !llvm.loop !0165 166for.cond.for.end6_crit_edge: ; preds = %for.cond.loopexit167 br label %for.end6168 169for.end6: ; preds = %for.cond.for.end6_crit_edge, %entry170 ret void171}172 173!0 = !{!0, !1}174!1 = !{!"llvm.loop.unroll.count", i32 2}175;.176; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]]}177; CHECK: [[META1]] = !{!"llvm.loop.unroll.disable"}178;.179