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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; RUN: opt -p loop-unroll -unroll-full-max-count=0 -S %s | FileCheck %s3 4declare void @foo(i32)5 6define i32 @peel_last_with_trip_count_check_lcssa_phi(i32 %n) {7; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi(8; CHECK-SAME: i32 [[N:%.*]]) {9; CHECK-NEXT: [[ENTRY:.*]]:10; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -111; CHECK-NEXT: [[TMP0:%.*]] = icmp ne i32 [[SUB]], 012; CHECK-NEXT: br i1 [[TMP0]], label %[[ENTRY_SPLIT:.*]], label %[[EXIT_PEEL_BEGIN:.*]]13; CHECK: [[ENTRY_SPLIT]]:14; CHECK-NEXT: br label %[[LOOP:.*]]15; CHECK: [[LOOP]]:16; CHECK-NEXT: [[IV1:%.*]] = phi i32 [ 0, %[[ENTRY_SPLIT]] ], [ [[IV_NEXT1:%.*]], %[[LOOP]] ]17; CHECK-NEXT: call void @foo(i32 2)18; CHECK-NEXT: [[IV_NEXT1]] = add nuw i32 [[IV1]], 119; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[N]], 120; CHECK-NEXT: [[EC1:%.*]] = icmp ne i32 [[IV_NEXT1]], [[TMP1]]21; CHECK-NEXT: br i1 [[EC1]], label %[[LOOP]], label %[[EXIT_PEEL_BEGIN_LOOPEXIT:.*]], !llvm.loop [[LOOP0:![0-9]+]]22; CHECK: [[EXIT_PEEL_BEGIN_LOOPEXIT]]:23; CHECK-NEXT: [[DOTPH:%.*]] = phi i32 [ [[IV_NEXT1]], %[[LOOP]] ]24; CHECK-NEXT: br label %[[EXIT_PEEL_BEGIN]]25; CHECK: [[EXIT_PEEL_BEGIN]]:26; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[DOTPH]], %[[EXIT_PEEL_BEGIN_LOOPEXIT]] ]27; CHECK-NEXT: br label %[[LOOP_PEEL:.*]]28; CHECK: [[LOOP_PEEL]]:29; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]30; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 231; CHECK-NEXT: call void @foo(i32 [[SEL]])32; CHECK-NEXT: [[IV_NEXT:%.*]] = add i32 [[IV]], 133; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]34; CHECK-NEXT: br i1 [[EC]], label %[[EXIT_PEEL_NEXT:.*]], label %[[EXIT_PEEL_NEXT]]35; CHECK: [[EXIT_PEEL_NEXT]]:36; CHECK-NEXT: br label %[[LOOP_PEEL_NEXT:.*]]37; CHECK: [[LOOP_PEEL_NEXT]]:38; CHECK-NEXT: br label %[[EXIT:.*]]39; CHECK: [[EXIT]]:40; CHECK-NEXT: ret i32 [[SEL]]41;42entry:43 %sub = add i32 %n, -144 br label %loop45 46loop:47 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]48 %c = icmp eq i32 %iv, %sub49 %sel = select i1 %c, i32 1, i32 250 call void @foo(i32 %sel)51 %iv.next = add i32 %iv, 152 %ec = icmp ne i32 %iv.next, %n53 br i1 %ec, label %loop, label %exit54 55exit:56 %sel.lcssa = phi i32 [ %sel, %loop ]57 ret i32 %sel.lcssa58}59 60define i32 @peel_last_with_trip_count_check_lcssa_phi_step_2(i32 %n) {61; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_step_2(62; CHECK-SAME: i32 [[N:%.*]]) {63; CHECK-NEXT: [[ENTRY:.*]]:64; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -265; CHECK-NEXT: br label %[[LOOP:.*]]66; CHECK: [[LOOP]]:67; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]68; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]69; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 270; CHECK-NEXT: call void @foo(i32 [[SEL]])71; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 272; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]73; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]74; CHECK: [[EXIT]]:75; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP]] ]76; CHECK-NEXT: ret i32 [[SEL_LCSSA]]77;78entry:79 %sub = add i32 %n, -280 br label %loop81 82loop:83 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]84 %c = icmp eq i32 %iv, %sub85 %sel = select i1 %c, i32 1, i32 286 call void @foo(i32 %sel)87 %iv.next = add i32 %iv, 288 %ec = icmp ne i32 %iv.next, %n89 br i1 %ec, label %loop, label %exit90 91exit:92 %sel.lcssa = phi i32 [ %sel, %loop ]93 ret i32 %sel.lcssa94}95 96define i64 @peel_single_block_loop_iv_step_1_may_execute_only_once(i64 %n) {97; CHECK-LABEL: define i64 @peel_single_block_loop_iv_step_1_may_execute_only_once(98; CHECK-SAME: i64 [[N:%.*]]) {99; CHECK-NEXT: [[ENTRY:.*]]:100; CHECK-NEXT: [[N_NOT_0:%.*]] = icmp ne i64 [[N]], 0101; CHECK-NEXT: call void @llvm.assume(i1 [[N_NOT_0]])102; CHECK-NEXT: [[SUB:%.*]] = add nsw i64 [[N]], 1103; CHECK-NEXT: br label %[[LOOP:.*]]104; CHECK: [[LOOP]]:105; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]106; CHECK-NEXT: [[CMP18_NOT:%.*]] = icmp eq i64 [[IV]], [[N]]107; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP18_NOT]], i32 10, i32 20108; CHECK-NEXT: call void @foo(i32 [[COND]])109; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 1110; CHECK-NEXT: [[EC:%.*]] = icmp ne i64 [[IV_NEXT]], [[N]]111; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]112; CHECK: [[EXIT]]:113; CHECK-NEXT: [[IV_LCSSA:%.*]] = phi i64 [ [[IV]], %[[LOOP]] ]114; CHECK-NEXT: ret i64 [[IV_LCSSA]]115;116entry:117 %n.not.0 = icmp ne i64 %n, 0118 call void @llvm.assume(i1 %n.not.0)119 %sub = add nsw i64 %n, 1120 br label %loop121 122loop:123 %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]124 %cmp = icmp eq i64 %iv, %n125 %cond = select i1 %cmp, i32 10, i32 20126 call void @foo(i32 %cond)127 %iv.next = add i64 %iv, 1128 %ec = icmp ne i64 %iv.next, %n129 br i1 %ec, label %loop, label %exit130 131exit:132 ret i64 %iv133}134 135 136 137define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar(i32 %n) {138; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar(139; CHECK-SAME: i32 [[N:%.*]]) {140; CHECK-NEXT: [[ENTRY:.*]]:141; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -2142; CHECK-NEXT: br label %[[LOOP:.*]]143; CHECK: [[LOOP]]:144; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]145; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]146; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 2147; CHECK-NEXT: call void @foo(i32 [[SEL]])148; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1149; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]150; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]151; CHECK: [[EXIT]]:152; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP]] ]153; CHECK-NEXT: ret i32 [[SEL_LCSSA]]154;155entry:156 %sub = add i32 %n, -2157 br label %loop158 159loop:160 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]161 %c = icmp eq i32 %iv, %sub162 %sel = select i1 %c, i32 1, i32 2163 call void @foo(i32 %sel)164 %iv.next = add i32 %iv, 1165 %ec = icmp ne i32 %iv.next, %n166 br i1 %ec, label %loop, label %exit167 168exit:169 %sel.lcssa = phi i32 [ %sel, %loop ]170 ret i32 %sel.lcssa171}172 173 174define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar2(i32 %n) {175; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar2(176; CHECK-SAME: i32 [[N:%.*]]) {177; CHECK-NEXT: [[ENTRY:.*]]:178; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -2179; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1180; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i32 [[TMP0]], 0181; CHECK-NEXT: br i1 [[TMP1]], label %[[ENTRY_SPLIT:.*]], label %[[EXIT_PEEL_BEGIN:.*]]182; CHECK: [[ENTRY_SPLIT]]:183; CHECK-NEXT: br label %[[LOOP:.*]]184; CHECK: [[LOOP]]:185; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY_SPLIT]] ], [ [[IV_NEXT1:%.*]], %[[LOOP]] ]186; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[IV]], [[SUB]]187; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 2188; CHECK-NEXT: call void @foo(i32 [[SEL]])189; CHECK-NEXT: [[IV_NEXT1]] = add nuw i32 [[IV]], 1190; CHECK-NEXT: [[TMP2:%.*]] = sub i32 [[N]], 1191; CHECK-NEXT: [[EC1:%.*]] = icmp ne i32 [[IV_NEXT1]], [[TMP2]]192; CHECK-NEXT: br i1 [[EC1]], label %[[LOOP]], label %[[EXIT_PEEL_BEGIN_LOOPEXIT:.*]], !llvm.loop [[LOOP2:![0-9]+]]193; CHECK: [[EXIT_PEEL_BEGIN_LOOPEXIT]]:194; CHECK-NEXT: [[DOTPH:%.*]] = phi i32 [ [[IV_NEXT1]], %[[LOOP]] ]195; CHECK-NEXT: br label %[[EXIT_PEEL_BEGIN]]196; CHECK: [[EXIT_PEEL_BEGIN]]:197; CHECK-NEXT: [[TMP3:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[DOTPH]], %[[EXIT_PEEL_BEGIN_LOOPEXIT]] ]198; CHECK-NEXT: br label %[[LOOP_PEEL:.*]]199; CHECK: [[LOOP_PEEL]]:200; CHECK-NEXT: [[C_PEEL:%.*]] = icmp ne i32 [[TMP3]], [[SUB]]201; CHECK-NEXT: [[SEL_LCSSA:%.*]] = select i1 [[C_PEEL]], i32 1, i32 2202; CHECK-NEXT: call void @foo(i32 [[SEL_LCSSA]])203; CHECK-NEXT: [[IV_NEXT:%.*]] = add i32 [[TMP3]], 1204; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]205; CHECK-NEXT: br i1 [[EC]], label %[[EXIT_PEEL_NEXT:.*]], label %[[EXIT_PEEL_NEXT]]206; CHECK: [[EXIT_PEEL_NEXT]]:207; CHECK-NEXT: br label %[[LOOP_PEEL_NEXT:.*]]208; CHECK: [[LOOP_PEEL_NEXT]]:209; CHECK-NEXT: br label %[[EXIT:.*]]210; CHECK: [[EXIT]]:211; CHECK-NEXT: ret i32 [[SEL_LCSSA]]212;213entry:214 %sub = add i32 %n, -2215 br label %loop216 217loop:218 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]219 %c = icmp ne i32 %iv, %sub220 %sel = select i1 %c, i32 1, i32 2221 call void @foo(i32 %sel)222 %iv.next = add i32 %iv, 1223 %ec = icmp ne i32 %iv.next, %n224 br i1 %ec, label %loop, label %exit225 226exit:227 %sel.lcssa = phi i32 [ %sel, %loop ]228 ret i32 %sel.lcssa229}230 231 232 233define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar3(i32 %n) {234; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar3(235; CHECK-SAME: i32 [[N:%.*]]) {236; CHECK-NEXT: [[ENTRY:.*]]:237; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -1238; CHECK-NEXT: [[TMP0:%.*]] = icmp ne i32 [[SUB]], 0239; CHECK-NEXT: br i1 [[TMP0]], label %[[ENTRY_SPLIT:.*]], label %[[EXIT_PEEL_BEGIN:.*]]240; CHECK: [[ENTRY_SPLIT]]:241; CHECK-NEXT: br label %[[LOOP:.*]]242; CHECK: [[LOOP]]:243; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY_SPLIT]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]244; CHECK-NEXT: call void @foo(i32 2)245; CHECK-NEXT: [[IV_NEXT]] = add nuw i32 [[IV]], 1246; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[N]], 1247; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[TMP1]]248; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT_PEEL_BEGIN_LOOPEXIT:.*]], !llvm.loop [[LOOP3:![0-9]+]]249; CHECK: [[EXIT_PEEL_BEGIN_LOOPEXIT]]:250; CHECK-NEXT: [[DOTPH:%.*]] = phi i32 [ [[IV_NEXT]], %[[LOOP]] ]251; CHECK-NEXT: br label %[[EXIT_PEEL_BEGIN]]252; CHECK: [[EXIT_PEEL_BEGIN]]:253; CHECK-NEXT: [[TMP2:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[DOTPH]], %[[EXIT_PEEL_BEGIN_LOOPEXIT]] ]254; CHECK-NEXT: br label %[[LOOP_PEEL:.*]]255; CHECK: [[LOOP_PEEL]]:256; CHECK-NEXT: [[C_PEEL:%.*]] = icmp eq i32 [[TMP2]], [[SUB]]257; CHECK-NEXT: [[SEL_PEEL:%.*]] = select i1 [[C_PEEL]], i32 1, i32 2258; CHECK-NEXT: call void @foo(i32 [[SEL_PEEL]])259; CHECK-NEXT: [[IV_NEXT_PEEL:%.*]] = add i32 [[TMP2]], 1260; CHECK-NEXT: [[EC_PEEL:%.*]] = icmp ne i32 [[IV_NEXT_PEEL]], [[N]]261; CHECK-NEXT: br i1 [[EC_PEEL]], label %[[EXIT_PEEL_NEXT:.*]], label %[[EXIT_PEEL_NEXT]]262; CHECK: [[EXIT_PEEL_NEXT]]:263; CHECK-NEXT: br label %[[LOOP_PEEL_NEXT:.*]]264; CHECK: [[LOOP_PEEL_NEXT]]:265; CHECK-NEXT: br label %[[EXIT:.*]]266; CHECK: [[EXIT]]:267; CHECK-NEXT: ret i32 [[SEL_PEEL]]268;269entry:270 %sub = add i32 %n, -1271 br label %loop272 273loop:274 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]275 %c = icmp eq i32 %iv, %sub276 %sel = select i1 %c, i32 1, i32 2277 call void @foo(i32 %sel)278 %iv.next = add i32 %iv, 1279 %ec = icmp ne i32 %iv.next, %n280 br i1 %ec, label %loop, label %exit281 282exit:283 %sel.lcssa = phi i32 [ %sel, %loop ]284 ret i32 %sel.lcssa285}286 287define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar4(i32 %n) {288; CHECK-LABEL: define i32 @peel_last_with_trip_count_check_lcssa_phi_cmp_not_invar4(289; CHECK-SAME: i32 [[N:%.*]]) {290; CHECK-NEXT: [[ENTRY:.*]]:291; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -1292; CHECK-NEXT: br label %[[LOOP:.*]]293; CHECK: [[LOOP]]:294; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]295; CHECK-NEXT: [[C:%.*]] = icmp ne i32 [[IV]], [[SUB]]296; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C]], i32 1, i32 2297; CHECK-NEXT: call void @foo(i32 [[SEL]])298; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1299; CHECK-NEXT: [[EC:%.*]] = icmp ne i32 [[IV_NEXT]], [[N]]300; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]301; CHECK: [[EXIT]]:302; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP]] ]303; CHECK-NEXT: ret i32 [[SEL_LCSSA]]304;305entry:306 %sub = add i32 %n, -1307 br label %loop308 309loop:310 %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]311 %c = icmp ne i32 %iv, %sub312 %sel = select i1 %c, i32 1, i32 2313 call void @foo(i32 %sel)314 %iv.next = add i32 %iv, 1315 %ec = icmp ne i32 %iv.next, %n316 br i1 %ec, label %loop, label %exit317 318exit:319 %sel.lcssa = phi i32 [ %sel, %loop ]320 ret i32 %sel.lcssa321}322 323define void @peel_last_with_trip_count_check_nested_loop(i32 %n) {324; CHECK-LABEL: define void @peel_last_with_trip_count_check_nested_loop(325; CHECK-SAME: i32 [[N:%.*]]) {326; CHECK-NEXT: [[ENTRY:.*:]]327; CHECK-NEXT: [[SUB:%.*]] = add i32 [[N]], -1328; CHECK-NEXT: br label %[[OUTER_HEADER:.*]]329; CHECK: [[OUTER_HEADER_LOOPEXIT_PEEL_BEGIN_LOOPEXIT:.*]]:330; CHECK-NEXT: [[DOTPH:%.*]] = phi i32 [ [[IV_NEXT1:%.*]], %[[INNER_LATCH:.*]] ]331; CHECK-NEXT: br label %[[OUTER_HEADER_LOOPEXIT_PEEL_BEGIN:.*]]332; CHECK: [[OUTER_HEADER_LOOPEXIT_PEEL_BEGIN]]:333; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, %[[OUTER_HEADER]] ], [ [[DOTPH]], %[[OUTER_HEADER_LOOPEXIT_PEEL_BEGIN_LOOPEXIT]] ]334; CHECK-NEXT: br label %[[INNER_HEADER_PEEL:.*]]335; CHECK: [[INNER_HEADER_PEEL]]:336; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[IV]], [[SUB]]337; CHECK-NEXT: br i1 [[C]], label %[[INNER_LATCH_PEEL:.*]], label %[[THEN_PEEL:.*]]338; CHECK: [[THEN_PEEL]]:339; CHECK-NEXT: call void @foo(i32 1)340; CHECK-NEXT: br label %[[INNER_LATCH_PEEL]]341; CHECK: [[INNER_LATCH_PEEL]]:342; CHECK-NEXT: [[IV_NEXT:%.*]] = add i32 [[IV]], 1343; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i32 [[IV_NEXT]], [[N]]344; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label %[[OUTER_HEADER_LOOPEXIT_PEEL_NEXT:.*]], label %[[OUTER_HEADER_LOOPEXIT_PEEL_NEXT]]345; CHECK: [[OUTER_HEADER_LOOPEXIT_PEEL_NEXT]]:346; CHECK-NEXT: br label %[[INNER_HEADER_PEEL_NEXT:.*]]347; CHECK: [[INNER_HEADER_PEEL_NEXT]]:348; CHECK-NEXT: br label %[[OUTER_HEADER_LOOPEXIT:.*]]349; CHECK: [[OUTER_HEADER_LOOPEXIT]]:350; CHECK-NEXT: br label %[[OUTER_HEADER]]351; CHECK: [[OUTER_HEADER]]:352; CHECK-NEXT: [[TMP1:%.*]] = icmp ne i32 [[SUB]], 0353; CHECK-NEXT: br i1 [[TMP1]], label %[[OUTER_HEADER_SPLIT:.*]], label %[[OUTER_HEADER_LOOPEXIT_PEEL_BEGIN]]354; CHECK: [[OUTER_HEADER_SPLIT]]:355; CHECK-NEXT: br label %[[INNER_HEADER:.*]]356; CHECK: [[INNER_HEADER]]:357; CHECK-NEXT: [[IV1:%.*]] = phi i32 [ 0, %[[OUTER_HEADER_SPLIT]] ], [ [[IV_NEXT1]], %[[INNER_LATCH]] ]358; CHECK-NEXT: br i1 false, label %[[INNER_LATCH]], label %[[THEN:.*]]359; CHECK: [[THEN]]:360; CHECK-NEXT: call void @foo(i32 1)361; CHECK-NEXT: br label %[[INNER_LATCH]]362; CHECK: [[INNER_LATCH]]:363; CHECK-NEXT: [[IV_NEXT1]] = add nuw i32 [[IV1]], 1364; CHECK-NEXT: [[TMP2:%.*]] = sub i32 [[N]], 1365; CHECK-NEXT: [[EXITCOND_NOT1:%.*]] = icmp eq i32 [[IV_NEXT1]], [[TMP2]]366; CHECK-NEXT: br i1 [[EXITCOND_NOT1]], label %[[OUTER_HEADER_LOOPEXIT_PEEL_BEGIN_LOOPEXIT]], label %[[INNER_HEADER]], !llvm.loop [[LOOP4:![0-9]+]]367;368entry:369 %sub = add i32 %n, -1370 br label %outer.header371 372outer.header:373 br label %inner.header374 375inner.header:376 %iv = phi i32 [ 0, %outer.header ], [ %iv.next, %inner.latch ]377 %c = icmp eq i32 %iv, %sub378 br i1 %c, label %inner.latch, label %then379 380then:381 call void @foo(i32 1)382 br label %inner.latch383 384inner.latch:385 %iv.next = add i32 %iv, 1386 %ec = icmp eq i32 %iv.next, %n387 br i1 %ec, label %outer.header, label %inner.header388}389 390;.391; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]]}392; CHECK: [[META1]] = !{!"llvm.loop.peeled.count", i32 1}393; CHECK: [[LOOP2]] = distinct !{[[LOOP2]], [[META1]]}394; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]]}395; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META1]]}396;.397