1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=indvars -S | FileCheck %s 3; RUN: opt < %s -S -passes='lcssa,loop-simplify,require<target-ir>,require<scalar-evolution>,require<domtree>,loop(indvars)' | FileCheck %s 4 5; Provide legal integer types. 6target datalayout = "n8:16:32:64" 7 8 9target triple = "x86_64-apple-darwin" 10 11declare void @use(i64 %x) 12 13; Only one phi now. 14; One trunc for the gep. 15; One trunc for the dummy() call. 16define void @loop_0(ptr %a, i1 %arg) { 17; CHECK-LABEL: @loop_0( 18; CHECK-NEXT: Prologue: 19; CHECK-NEXT: br i1 %arg, label [[B18_PREHEADER:%.*]], label [[B6:%.*]] 20; CHECK: B18.preheader: 21; CHECK-NEXT: br label [[B18:%.*]] 22; CHECK: B18: 23; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[B18_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[B24:%.*]] ] 24; CHECK-NEXT: call void @use(i64 [[INDVARS_IV]]) 25; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 26; CHECK-NEXT: [[TMP0:%.*]] = trunc nuw nsw i64 [[INDVARS_IV]] to i32 27; CHECK-NEXT: [[O:%.*]] = getelementptr i32, ptr [[A:%.*]], i32 [[TMP0]] 28; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[O]], align 4 29; CHECK-NEXT: [[T:%.*]] = icmp eq i32 [[V]], 0 30; CHECK-NEXT: br i1 [[T]], label [[EXIT24:%.*]], label [[B24]] 31; CHECK: B24: 32; CHECK-NEXT: [[T2:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 20 33; CHECK-NEXT: br i1 [[T2]], label [[B6_LOOPEXIT:%.*]], label [[B18]] 34; CHECK: B6.loopexit: 35; CHECK-NEXT: br label [[B6]] 36; CHECK: B6: 37; CHECK-NEXT: ret void 38; CHECK: exit24: 39; CHECK-NEXT: [[DOT02_LCSSA_WIDE:%.*]] = phi i64 [ [[INDVARS_IV]], [[B18]] ] 40; CHECK-NEXT: [[TMP1:%.*]] = trunc nuw nsw i64 [[DOT02_LCSSA_WIDE]] to i32 41; CHECK-NEXT: call void @dummy(i32 [[TMP1]]) 42; CHECK-NEXT: unreachable 43; 44Prologue: 45 br i1 %arg, label %B18, label %B6 46 47B18: ; preds = %B24, %Prologue 48 %.02 = phi i32 [ 0, %Prologue ], [ %tmp33, %B24 ] 49 %tmp23 = zext i32 %.02 to i64 50 call void @use(i64 %tmp23) 51 %tmp33 = add i32 %.02, 1 52 %o = getelementptr i32, ptr %a, i32 %.02 53 %v = load i32, ptr %o 54 %t = icmp eq i32 %v, 0 55 br i1 %t, label %exit24, label %B24 56 57B24: ; preds = %B18 58 %t2 = icmp eq i32 %tmp33, 20 59 br i1 %t2, label %B6, label %B18 60 61B6: ; preds = %Prologue 62 ret void 63 64exit24: ; preds = %B18 65 call void @dummy(i32 %.02) 66 unreachable 67} 68 69; Make sure that dead zext is removed and no widening happens. 70define void @loop_0_dead(ptr %a, i1 %arg) { 71; CHECK-LABEL: @loop_0_dead( 72; CHECK-NEXT: Prologue: 73; CHECK-NEXT: br i1 %arg, label [[B18_PREHEADER:%.*]], label [[B6:%.*]] 74; CHECK: B18.preheader: 75; CHECK-NEXT: br label [[B18:%.*]] 76; CHECK: B18: 77; CHECK-NEXT: [[DOT02:%.*]] = phi i32 [ [[TMP33:%.*]], [[B24:%.*]] ], [ 0, [[B18_PREHEADER]] ] 78; CHECK-NEXT: [[TMP33]] = add nuw nsw i32 [[DOT02]], 1 79; CHECK-NEXT: [[O:%.*]] = getelementptr i32, ptr [[A:%.*]], i32 [[DOT02]] 80; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[O]], align 4 81; CHECK-NEXT: [[T:%.*]] = icmp eq i32 [[V]], 0 82; CHECK-NEXT: br i1 [[T]], label [[EXIT24:%.*]], label [[B24]] 83; CHECK: B24: 84; CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[TMP33]], 20 85; CHECK-NEXT: br i1 [[T2]], label [[B6_LOOPEXIT:%.*]], label [[B18]] 86; CHECK: B6.loopexit: 87; CHECK-NEXT: br label [[B6]] 88; CHECK: B6: 89; CHECK-NEXT: ret void 90; CHECK: exit24: 91; CHECK-NEXT: [[DOT02_LCSSA:%.*]] = phi i32 [ [[DOT02]], [[B18]] ] 92; CHECK-NEXT: call void @dummy(i32 [[DOT02_LCSSA]]) 93; CHECK-NEXT: unreachable 94; 95Prologue: 96 br i1 %arg, label %B18, label %B6 97 98B18: ; preds = %B24, %Prologue 99 %.02 = phi i32 [ 0, %Prologue ], [ %tmp33, %B24 ] 100 %tmp23 = zext i32 %.02 to i64 101 %tmp33 = add i32 %.02, 1 102 %o = getelementptr i32, ptr %a, i32 %.02 103 %v = load i32, ptr %o 104 %t = icmp eq i32 %v, 0 105 br i1 %t, label %exit24, label %B24 106 107B24: ; preds = %B18 108 %t2 = icmp eq i32 %tmp33, 20 109 br i1 %t2, label %B6, label %B18 110 111B6: ; preds = %Prologue 112 ret void 113 114exit24: ; preds = %B18 115 call void @dummy(i32 %.02) 116 unreachable 117} 118 119define void @loop_1(i32 %lim) { 120; CHECK-LABEL: @loop_1( 121; CHECK-NEXT: entry: 122; CHECK-NEXT: [[ENTRY_COND:%.*]] = icmp ne i32 [[LIM:%.*]], 0 123; CHECK-NEXT: br i1 [[ENTRY_COND]], label [[LOOP_PREHEADER:%.*]], label [[LEAVE:%.*]] 124; CHECK: loop.preheader: 125; CHECK-NEXT: [[UMAX:%.*]] = call i32 @llvm.umax.i32(i32 [[LIM]], i32 2) 126; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[UMAX]] to i64 127; CHECK-NEXT: br label [[LOOP:%.*]] 128; CHECK: loop: 129; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 1, [[LOOP_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[LOOP]] ] 130; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 131; CHECK-NEXT: [[TMP0:%.*]] = add nsw i64 [[INDVARS_IV]], -1 132; CHECK-NEXT: call void @dummy.i64(i64 [[TMP0]]) 133; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]] 134; CHECK-NEXT: br i1 [[EXITCOND]], label [[LOOP]], label [[LEAVE_LOOPEXIT:%.*]] 135; CHECK: leave.loopexit: 136; CHECK-NEXT: br label [[LEAVE]] 137; CHECK: leave: 138; CHECK-NEXT: ret void 139; 140 entry: 141 %entry.cond = icmp ne i32 %lim, 0 142 br i1 %entry.cond, label %loop, label %leave 143 144 loop: 145 146 %iv = phi i32 [ 1, %entry ], [ %iv.inc, %loop ] 147 %iv.inc = add i32 %iv, 1 148 %iv.inc.sub = add i32 %iv, -1 149 %iv.inc.sub.zext = zext i32 %iv.inc.sub to i64 150 call void @dummy.i64(i64 %iv.inc.sub.zext) 151 %be.cond = icmp ult i32 %iv.inc, %lim 152 br i1 %be.cond, label %loop, label %leave 153 154 leave: 155 ret void 156} 157 158declare void @dummy(i32) 159declare void @dummy.i64(i64) 160 161 162define void @loop_2(i32 %size, i32 %nsteps, i32 %hsize, ptr %lined, i8 %arg) { 163; CHECK-LABEL: @loop_2( 164; CHECK-NEXT: entry: 165; CHECK-NEXT: [[CMP215:%.*]] = icmp sgt i32 [[SIZE:%.*]], 1 166; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[SIZE]] to i64 167; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[HSIZE:%.*]] to i64 168; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[NSTEPS:%.*]], i32 1) 169; CHECK-NEXT: [[WIDE_TRIP_COUNT14:%.*]] = zext i32 [[SMAX]] to i64 170; CHECK-NEXT: br label [[FOR_BODY:%.*]] 171; CHECK: for.body: 172; CHECK-NEXT: [[INDVARS_IV9:%.*]] = phi i64 [ [[INDVARS_IV_NEXT10:%.*]], [[FOR_INC:%.*]] ], [ 0, [[ENTRY:%.*]] ] 173; CHECK-NEXT: [[TMP2:%.*]] = mul nsw i64 [[INDVARS_IV9]], [[TMP0]] 174; CHECK-NEXT: [[TMP3:%.*]] = add nsw i64 [[TMP2]], [[TMP1]] 175; CHECK-NEXT: br i1 [[CMP215]], label [[FOR_BODY2_PREHEADER:%.*]], label [[FOR_INC]] 176; CHECK: for.body2.preheader: 177; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[SIZE]] to i64 178; CHECK-NEXT: br label [[FOR_BODY2:%.*]] 179; CHECK: for.body2: 180; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 1, [[FOR_BODY2_PREHEADER]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY2]] ] 181; CHECK-NEXT: [[TMP4:%.*]] = add nsw i64 [[TMP3]], [[INDVARS_IV]] 182; CHECK-NEXT: [[ADD_PTR:%.*]] = getelementptr inbounds i8, ptr [[LINED:%.*]], i64 [[TMP4]] 183; CHECK-NEXT: store i8 [[ARG:%.*]], ptr [[ADD_PTR]], align 1 184; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1 185; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]] 186; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY2]], label [[FOR_BODY3_PREHEADER:%.*]] 187; CHECK: for.body3.preheader: 188; CHECK-NEXT: [[TMP5:%.*]] = trunc nsw i64 [[TMP3]] to i32 189; CHECK-NEXT: [[TMP6:%.*]] = zext i32 [[TMP5]] to i64 190; CHECK-NEXT: [[WIDE_TRIP_COUNT7:%.*]] = zext i32 [[SIZE]] to i64 191; CHECK-NEXT: br label [[FOR_BODY3:%.*]] 192; CHECK: for.body3: 193; CHECK-NEXT: [[INDVARS_IV3:%.*]] = phi i64 [ 1, [[FOR_BODY3_PREHEADER]] ], [ [[INDVARS_IV_NEXT4:%.*]], [[FOR_BODY3]] ] 194; CHECK-NEXT: [[TMP7:%.*]] = add nuw nsw i64 [[TMP6]], [[INDVARS_IV3]] 195; CHECK-NEXT: [[ADD_PTR2:%.*]] = getelementptr inbounds i8, ptr [[LINED]], i64 [[TMP7]] 196; CHECK-NEXT: store i8 [[ARG]], ptr [[ADD_PTR2]], align 1 197; CHECK-NEXT: [[INDVARS_IV_NEXT4]] = add nuw nsw i64 [[INDVARS_IV3]], 1 198; CHECK-NEXT: [[EXITCOND8:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT4]], [[WIDE_TRIP_COUNT7]] 199; CHECK-NEXT: br i1 [[EXITCOND8]], label [[FOR_BODY3]], label [[FOR_INC_LOOPEXIT:%.*]] 200; CHECK: for.inc.loopexit: 201; CHECK-NEXT: br label [[FOR_INC]] 202; CHECK: for.inc: 203; CHECK-NEXT: [[INDVARS_IV_NEXT10]] = add nuw nsw i64 [[INDVARS_IV9]], 1 204; CHECK-NEXT: [[EXITCOND15:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT10]], [[WIDE_TRIP_COUNT14]] 205; CHECK-NEXT: br i1 [[EXITCOND15]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT:%.*]] 206; CHECK: for.end.loopexit: 207; CHECK-NEXT: ret void 208; 209entry: 210 %cmp215 = icmp sgt i32 %size, 1 211 br label %for.body 212 213for.body: 214 %j = phi i32 [ 0, %entry ], [ %inc6, %for.inc ] 215 %mul = mul nsw i32 %j, %size 216 %add = add nsw i32 %mul, %hsize 217 br i1 %cmp215, label %for.body2, label %for.inc 218 219; check that the induction variable of the inner loop has been widened after indvars. 220for.body2: 221 %k = phi i32 [ %inc, %for.body2 ], [ 1, %for.body ] 222 %add4 = add nsw i32 %add, %k 223 %idx.ext = sext i32 %add4 to i64 224 %add.ptr = getelementptr inbounds i8, ptr %lined, i64 %idx.ext 225 store i8 %arg, ptr %add.ptr, align 1 226 %inc = add nsw i32 %k, 1 227 %cmp2 = icmp slt i32 %inc, %size 228 br i1 %cmp2, label %for.body2, label %for.body3 229 230; check that the induction variable of the inner loop has been widened after indvars. 231for.body3: 232 %l = phi i32 [ %inc2, %for.body3 ], [ 1, %for.body2 ] 233 %add5 = add nuw i32 %add, %l 234 %idx.ext2 = zext i32 %add5 to i64 235 %add.ptr2 = getelementptr inbounds i8, ptr %lined, i64 %idx.ext2 236 store i8 %arg, ptr %add.ptr2, align 1 237 %inc2 = add nsw i32 %l, 1 238 %cmp3 = icmp slt i32 %inc2, %size 239 br i1 %cmp3, label %for.body3, label %for.inc 240 241for.inc: 242 %inc6 = add nsw i32 %j, 1 243 %cmp = icmp slt i32 %inc6, %nsteps 244 br i1 %cmp, label %for.body, label %for.end.loopexit 245 246for.end.loopexit: 247 ret void 248} 249