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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 52; RUN: opt -p loop-unroll -mcpu=apple-m1 -S %s | FileCheck --check-prefix=APPLE %s3; RUN: opt -p loop-unroll -mcpu=apple-m2 -S %s | FileCheck --check-prefix=APPLE %s4; RUN: opt -p loop-unroll -mcpu=apple-m3 -S %s | FileCheck --check-prefix=APPLE %s5; RUN: opt -p loop-unroll -mcpu=apple-m4 -S %s | FileCheck --check-prefix=APPLE %s6; RUN: opt -p loop-unroll -mcpu=apple-m1 -unroll-runtime-multi-exit=false -S %s | FileCheck --check-prefix=NOUNROLL %s7 8target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-n32:64-S128-Fn32"9target triple = "arm64-apple-macosx15.0.0"10 11define i1 @multi_2_exit_find_i8_loop(ptr %vec, i8 %tgt) {12; APPLE-LABEL: define i1 @multi_2_exit_find_i8_loop(13; APPLE-SAME: ptr [[VEC:%.*]], i8 [[TGT:%.*]]) #[[ATTR0:[0-9]+]] {14; APPLE-NEXT: [[ENTRY:.*]]:15; APPLE-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 816; APPLE-NEXT: [[START2:%.*]] = ptrtoint ptr [[START]] to i6417; APPLE-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 118; APPLE-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 819; APPLE-NEXT: [[END1:%.*]] = ptrtoint ptr [[END]] to i6420; APPLE-NEXT: [[TMP0:%.*]] = sub i64 [[END1]], [[START2]]21; APPLE-NEXT: [[TMP1:%.*]] = freeze i64 [[TMP0]]22; APPLE-NEXT: [[TMP2:%.*]] = add i64 [[TMP1]], -123; APPLE-NEXT: [[XTRAITER:%.*]] = and i64 [[TMP1]], 324; APPLE-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 025; APPLE-NEXT: br i1 [[LCMP_MOD]], label %[[LOOP_HEADER_PROL_PREHEADER:.*]], label %[[LOOP_HEADER_PROL_LOOPEXIT:.*]]26; APPLE: [[LOOP_HEADER_PROL_PREHEADER]]:27; APPLE-NEXT: br label %[[LOOP_HEADER_PROL:.*]]28; APPLE: [[LOOP_HEADER_PROL]]:29; APPLE-NEXT: [[PTR_IV_PROL:%.*]] = phi ptr [ [[PTR_IV_NEXT_PROL:%.*]], %[[LOOP_LATCH_PROL:.*]] ], [ [[START]], %[[LOOP_HEADER_PROL_PREHEADER]] ]30; APPLE-NEXT: [[PROL_ITER:%.*]] = phi i64 [ 0, %[[LOOP_HEADER_PROL_PREHEADER]] ], [ [[PROL_ITER_NEXT:%.*]], %[[LOOP_LATCH_PROL]] ]31; APPLE-NEXT: [[L_PROL:%.*]] = load i8, ptr [[PTR_IV_PROL]], align 832; APPLE-NEXT: [[C_1_PROL:%.*]] = icmp eq i8 [[L_PROL]], [[TGT]]33; APPLE-NEXT: br i1 [[C_1_PROL]], label %[[EXIT_UNR_LCSSA_LOOPEXIT3:.*]], label %[[LOOP_LATCH_PROL]]34; APPLE: [[LOOP_LATCH_PROL]]:35; APPLE-NEXT: [[PTR_IV_NEXT_PROL]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_PROL]], i64 136; APPLE-NEXT: [[C_2_PROL:%.*]] = icmp eq ptr [[PTR_IV_NEXT_PROL]], [[END]]37; APPLE-NEXT: [[PROL_ITER_NEXT]] = add i64 [[PROL_ITER]], 138; APPLE-NEXT: [[PROL_ITER_CMP:%.*]] = icmp ne i64 [[PROL_ITER_NEXT]], [[XTRAITER]]39; APPLE-NEXT: br i1 [[PROL_ITER_CMP]], label %[[LOOP_HEADER_PROL]], label %[[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA:.*]], !llvm.loop [[LOOP0:![0-9]+]]40; APPLE: [[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA]]:41; APPLE-NEXT: [[RES_UNR_PH:%.*]] = phi ptr [ [[END]], %[[LOOP_LATCH_PROL]] ]42; APPLE-NEXT: [[PTR_IV_UNR_PH:%.*]] = phi ptr [ [[PTR_IV_NEXT_PROL]], %[[LOOP_LATCH_PROL]] ]43; APPLE-NEXT: br label %[[LOOP_HEADER_PROL_LOOPEXIT]]44; APPLE: [[LOOP_HEADER_PROL_LOOPEXIT]]:45; APPLE-NEXT: [[RES_UNR:%.*]] = phi ptr [ poison, %[[ENTRY]] ], [ [[RES_UNR_PH]], %[[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA]] ]46; APPLE-NEXT: [[PTR_IV_UNR:%.*]] = phi ptr [ [[START]], %[[ENTRY]] ], [ [[PTR_IV_UNR_PH]], %[[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA]] ]47; APPLE-NEXT: [[TMP3:%.*]] = icmp ult i64 [[TMP2]], 348; APPLE-NEXT: br i1 [[TMP3]], label %[[EXIT:.*]], label %[[ENTRY_NEW:.*]]49; APPLE: [[ENTRY_NEW]]:50; APPLE-NEXT: br label %[[LOOP_HEADER:.*]]51; APPLE: [[LOOP_HEADER]]:52; APPLE-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_UNR]], %[[ENTRY_NEW]] ], [ [[PTR_IV_NEXT_3:%.*]], %[[LOOP_LATCH_3:.*]] ]53; APPLE-NEXT: [[L:%.*]] = load i8, ptr [[PTR_IV]], align 854; APPLE-NEXT: [[C_1:%.*]] = icmp eq i8 [[L]], [[TGT]]55; APPLE-NEXT: br i1 [[C_1]], label %[[EXIT_UNR_LCSSA_LOOPEXIT:.*]], label %[[LOOP_LATCH:.*]]56; APPLE: [[LOOP_LATCH]]:57; APPLE-NEXT: [[PTR_IV_NEXT:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 158; APPLE-NEXT: [[L_1:%.*]] = load i8, ptr [[PTR_IV_NEXT]], align 859; APPLE-NEXT: [[C_1_1:%.*]] = icmp eq i8 [[L_1]], [[TGT]]60; APPLE-NEXT: br i1 [[C_1_1]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_LATCH_1:.*]]61; APPLE: [[LOOP_LATCH_1]]:62; APPLE-NEXT: [[PTR_IV_NEXT_1:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_NEXT]], i64 163; APPLE-NEXT: [[L_2:%.*]] = load i8, ptr [[PTR_IV_NEXT_1]], align 864; APPLE-NEXT: [[C_1_2:%.*]] = icmp eq i8 [[L_2]], [[TGT]]65; APPLE-NEXT: br i1 [[C_1_2]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_LATCH_2:.*]]66; APPLE: [[LOOP_LATCH_2]]:67; APPLE-NEXT: [[PTR_IV_NEXT_2:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_NEXT_1]], i64 168; APPLE-NEXT: [[L_3:%.*]] = load i8, ptr [[PTR_IV_NEXT_2]], align 869; APPLE-NEXT: [[C_1_3:%.*]] = icmp eq i8 [[L_3]], [[TGT]]70; APPLE-NEXT: br i1 [[C_1_3]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_LATCH_3]]71; APPLE: [[LOOP_LATCH_3]]:72; APPLE-NEXT: [[PTR_IV_NEXT_3]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_NEXT_2]], i64 173; APPLE-NEXT: [[C_2_3:%.*]] = icmp eq ptr [[PTR_IV_NEXT_3]], [[END]]74; APPLE-NEXT: br i1 [[C_2_3]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_HEADER]]75; APPLE: [[EXIT_UNR_LCSSA_LOOPEXIT]]:76; APPLE-NEXT: [[RES_PH_PH:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[PTR_IV_NEXT]], %[[LOOP_LATCH]] ], [ [[PTR_IV_NEXT_1]], %[[LOOP_LATCH_1]] ], [ [[PTR_IV_NEXT_2]], %[[LOOP_LATCH_2]] ], [ [[END]], %[[LOOP_LATCH_3]] ]77; APPLE-NEXT: br label %[[EXIT_UNR_LCSSA:.*]]78; APPLE: [[EXIT_UNR_LCSSA_LOOPEXIT3]]:79; APPLE-NEXT: [[RES_PH_PH4:%.*]] = phi ptr [ [[PTR_IV_PROL]], %[[LOOP_HEADER_PROL]] ]80; APPLE-NEXT: br label %[[EXIT_UNR_LCSSA]]81; APPLE: [[EXIT_UNR_LCSSA]]:82; APPLE-NEXT: [[RES_PH:%.*]] = phi ptr [ [[RES_PH_PH]], %[[EXIT_UNR_LCSSA_LOOPEXIT]] ], [ [[RES_PH_PH4]], %[[EXIT_UNR_LCSSA_LOOPEXIT3]] ]83; APPLE-NEXT: br label %[[EXIT]]84; APPLE: [[EXIT]]:85; APPLE-NEXT: [[RES:%.*]] = phi ptr [ [[RES_UNR]], %[[LOOP_HEADER_PROL_LOOPEXIT]] ], [ [[RES_PH]], %[[EXIT_UNR_LCSSA]] ]86; APPLE-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]87; APPLE-NEXT: ret i1 [[C_3]]88;89; NOUNROLL-LABEL: define i1 @multi_2_exit_find_i8_loop(90; NOUNROLL-SAME: ptr [[VEC:%.*]], i8 [[TGT:%.*]]) #[[ATTR0:[0-9]+]] {91; NOUNROLL-NEXT: [[ENTRY:.*]]:92; NOUNROLL-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 893; NOUNROLL-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 194; NOUNROLL-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 895; NOUNROLL-NEXT: br label %[[LOOP_HEADER:.*]]96; NOUNROLL: [[LOOP_HEADER]]:97; NOUNROLL-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]98; NOUNROLL-NEXT: [[L:%.*]] = load i8, ptr [[PTR_IV]], align 899; NOUNROLL-NEXT: [[C_1:%.*]] = icmp eq i8 [[L]], [[TGT]]100; NOUNROLL-NEXT: br i1 [[C_1]], label %[[EXIT:.*]], label %[[LOOP_LATCH]]101; NOUNROLL: [[LOOP_LATCH]]:102; NOUNROLL-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 1103; NOUNROLL-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]104; NOUNROLL-NEXT: br i1 [[C_2]], label %[[EXIT]], label %[[LOOP_HEADER]]105; NOUNROLL: [[EXIT]]:106; NOUNROLL-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]107; NOUNROLL-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]108; NOUNROLL-NEXT: ret i1 [[C_3]]109;110entry:111 %start = load ptr, ptr %vec, align 8112 %gep.end = getelementptr inbounds nuw i8, ptr %vec, i64 1113 %end = load ptr, ptr %gep.end, align 8114 br label %loop.header115 116loop.header:117 %ptr.iv = phi ptr [ %ptr.iv.next, %loop.latch ], [ %start, %entry ]118 %l = load i8, ptr %ptr.iv, align 8119 %c.1 = icmp eq i8 %l, %tgt120 br i1 %c.1, label %exit, label %loop.latch121 122loop.latch:123 %ptr.iv.next = getelementptr inbounds nuw i8, ptr %ptr.iv, i64 1124 %c.2 = icmp eq ptr %ptr.iv.next, %end125 br i1 %c.2, label %exit, label %loop.header126 127exit:128 %res = phi ptr [ %ptr.iv, %loop.header ], [ %end, %loop.latch ]129 %c.3 = icmp eq ptr %res, %end130 ret i1 %c.3131}132 133 134define i1 @multi_2_exit_find_ptr_loop(ptr %vec, ptr %tgt) {135; APPLE-LABEL: define i1 @multi_2_exit_find_ptr_loop(136; APPLE-SAME: ptr [[VEC:%.*]], ptr [[TGT:%.*]]) #[[ATTR0]] {137; APPLE-NEXT: [[ENTRY:.*]]:138; APPLE-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8139; APPLE-NEXT: [[START2:%.*]] = ptrtoint ptr [[START]] to i64140; APPLE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[START]], i64 8) ]141; APPLE-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 8142; APPLE-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8143; APPLE-NEXT: [[END1:%.*]] = ptrtoint ptr [[END]] to i64144; APPLE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]145; APPLE-NEXT: [[TMP0:%.*]] = add i64 [[END1]], -8146; APPLE-NEXT: [[TMP1:%.*]] = sub i64 [[TMP0]], [[START2]]147; APPLE-NEXT: [[TMP2:%.*]] = lshr i64 [[TMP1]], 3148; APPLE-NEXT: [[TMP3:%.*]] = add nuw nsw i64 [[TMP2]], 1149; APPLE-NEXT: [[TMP4:%.*]] = freeze i64 [[TMP3]]150; APPLE-NEXT: [[TMP5:%.*]] = add i64 [[TMP4]], -1151; APPLE-NEXT: [[XTRAITER:%.*]] = and i64 [[TMP4]], 3152; APPLE-NEXT: [[LCMP_MOD:%.*]] = icmp ne i64 [[XTRAITER]], 0153; APPLE-NEXT: br i1 [[LCMP_MOD]], label %[[LOOP_HEADER_PROL_PREHEADER:.*]], label %[[LOOP_HEADER_PROL_LOOPEXIT:.*]]154; APPLE: [[LOOP_HEADER_PROL_PREHEADER]]:155; APPLE-NEXT: br label %[[LOOP_HEADER_PROL:.*]]156; APPLE: [[LOOP_HEADER_PROL]]:157; APPLE-NEXT: [[PTR_IV_PROL:%.*]] = phi ptr [ [[PTR_IV_NEXT_PROL:%.*]], %[[LOOP_LATCH_PROL:.*]] ], [ [[START]], %[[LOOP_HEADER_PROL_PREHEADER]] ]158; APPLE-NEXT: [[PROL_ITER:%.*]] = phi i64 [ 0, %[[LOOP_HEADER_PROL_PREHEADER]] ], [ [[PROL_ITER_NEXT:%.*]], %[[LOOP_LATCH_PROL]] ]159; APPLE-NEXT: [[L_PROL:%.*]] = load ptr, ptr [[PTR_IV_PROL]], align 8160; APPLE-NEXT: [[C_1_PROL:%.*]] = icmp eq ptr [[L_PROL]], [[TGT]]161; APPLE-NEXT: br i1 [[C_1_PROL]], label %[[EXIT_UNR_LCSSA_LOOPEXIT3:.*]], label %[[LOOP_LATCH_PROL]]162; APPLE: [[LOOP_LATCH_PROL]]:163; APPLE-NEXT: [[PTR_IV_NEXT_PROL]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_PROL]], i64 8164; APPLE-NEXT: [[C_2_PROL:%.*]] = icmp eq ptr [[PTR_IV_NEXT_PROL]], [[END]]165; APPLE-NEXT: [[PROL_ITER_NEXT]] = add i64 [[PROL_ITER]], 1166; APPLE-NEXT: [[PROL_ITER_CMP:%.*]] = icmp ne i64 [[PROL_ITER_NEXT]], [[XTRAITER]]167; APPLE-NEXT: br i1 [[PROL_ITER_CMP]], label %[[LOOP_HEADER_PROL]], label %[[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA:.*]], !llvm.loop [[LOOP2:![0-9]+]]168; APPLE: [[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA]]:169; APPLE-NEXT: [[RES_UNR_PH:%.*]] = phi ptr [ [[END]], %[[LOOP_LATCH_PROL]] ]170; APPLE-NEXT: [[PTR_IV_UNR_PH:%.*]] = phi ptr [ [[PTR_IV_NEXT_PROL]], %[[LOOP_LATCH_PROL]] ]171; APPLE-NEXT: br label %[[LOOP_HEADER_PROL_LOOPEXIT]]172; APPLE: [[LOOP_HEADER_PROL_LOOPEXIT]]:173; APPLE-NEXT: [[RES_UNR:%.*]] = phi ptr [ poison, %[[ENTRY]] ], [ [[RES_UNR_PH]], %[[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA]] ]174; APPLE-NEXT: [[PTR_IV_UNR:%.*]] = phi ptr [ [[START]], %[[ENTRY]] ], [ [[PTR_IV_UNR_PH]], %[[LOOP_HEADER_PROL_LOOPEXIT_UNR_LCSSA]] ]175; APPLE-NEXT: [[TMP6:%.*]] = icmp ult i64 [[TMP5]], 3176; APPLE-NEXT: br i1 [[TMP6]], label %[[EXIT:.*]], label %[[ENTRY_NEW:.*]]177; APPLE: [[ENTRY_NEW]]:178; APPLE-NEXT: br label %[[LOOP_HEADER:.*]]179; APPLE: [[LOOP_HEADER]]:180; APPLE-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_UNR]], %[[ENTRY_NEW]] ], [ [[PTR_IV_NEXT_3:%.*]], %[[LOOP_LATCH_3:.*]] ]181; APPLE-NEXT: [[L:%.*]] = load ptr, ptr [[PTR_IV]], align 8182; APPLE-NEXT: [[C_1:%.*]] = icmp eq ptr [[L]], [[TGT]]183; APPLE-NEXT: br i1 [[C_1]], label %[[EXIT_UNR_LCSSA_LOOPEXIT:.*]], label %[[LOOP_LATCH:.*]]184; APPLE: [[LOOP_LATCH]]:185; APPLE-NEXT: [[PTR_IV_NEXT:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 8186; APPLE-NEXT: [[L_1:%.*]] = load ptr, ptr [[PTR_IV_NEXT]], align 8187; APPLE-NEXT: [[C_1_1:%.*]] = icmp eq ptr [[L_1]], [[TGT]]188; APPLE-NEXT: br i1 [[C_1_1]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_LATCH_1:.*]]189; APPLE: [[LOOP_LATCH_1]]:190; APPLE-NEXT: [[PTR_IV_NEXT_1:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_NEXT]], i64 8191; APPLE-NEXT: [[L_2:%.*]] = load ptr, ptr [[PTR_IV_NEXT_1]], align 8192; APPLE-NEXT: [[C_1_2:%.*]] = icmp eq ptr [[L_2]], [[TGT]]193; APPLE-NEXT: br i1 [[C_1_2]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_LATCH_2:.*]]194; APPLE: [[LOOP_LATCH_2]]:195; APPLE-NEXT: [[PTR_IV_NEXT_2:%.*]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_NEXT_1]], i64 8196; APPLE-NEXT: [[L_3:%.*]] = load ptr, ptr [[PTR_IV_NEXT_2]], align 8197; APPLE-NEXT: [[C_1_3:%.*]] = icmp eq ptr [[L_3]], [[TGT]]198; APPLE-NEXT: br i1 [[C_1_3]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_LATCH_3]]199; APPLE: [[LOOP_LATCH_3]]:200; APPLE-NEXT: [[PTR_IV_NEXT_3]] = getelementptr inbounds nuw i8, ptr [[PTR_IV_NEXT_2]], i64 8201; APPLE-NEXT: [[C_2_3:%.*]] = icmp eq ptr [[PTR_IV_NEXT_3]], [[END]]202; APPLE-NEXT: br i1 [[C_2_3]], label %[[EXIT_UNR_LCSSA_LOOPEXIT]], label %[[LOOP_HEADER]]203; APPLE: [[EXIT_UNR_LCSSA_LOOPEXIT]]:204; APPLE-NEXT: [[RES_PH_PH:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[PTR_IV_NEXT]], %[[LOOP_LATCH]] ], [ [[PTR_IV_NEXT_1]], %[[LOOP_LATCH_1]] ], [ [[PTR_IV_NEXT_2]], %[[LOOP_LATCH_2]] ], [ [[END]], %[[LOOP_LATCH_3]] ]205; APPLE-NEXT: br label %[[EXIT_UNR_LCSSA:.*]]206; APPLE: [[EXIT_UNR_LCSSA_LOOPEXIT3]]:207; APPLE-NEXT: [[RES_PH_PH4:%.*]] = phi ptr [ [[PTR_IV_PROL]], %[[LOOP_HEADER_PROL]] ]208; APPLE-NEXT: br label %[[EXIT_UNR_LCSSA]]209; APPLE: [[EXIT_UNR_LCSSA]]:210; APPLE-NEXT: [[RES_PH:%.*]] = phi ptr [ [[RES_PH_PH]], %[[EXIT_UNR_LCSSA_LOOPEXIT]] ], [ [[RES_PH_PH4]], %[[EXIT_UNR_LCSSA_LOOPEXIT3]] ]211; APPLE-NEXT: br label %[[EXIT]]212; APPLE: [[EXIT]]:213; APPLE-NEXT: [[RES:%.*]] = phi ptr [ [[RES_UNR]], %[[LOOP_HEADER_PROL_LOOPEXIT]] ], [ [[RES_PH]], %[[EXIT_UNR_LCSSA]] ]214; APPLE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]215; APPLE-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]216; APPLE-NEXT: ret i1 [[C_3]]217;218; NOUNROLL-LABEL: define i1 @multi_2_exit_find_ptr_loop(219; NOUNROLL-SAME: ptr [[VEC:%.*]], ptr [[TGT:%.*]]) #[[ATTR0]] {220; NOUNROLL-NEXT: [[ENTRY:.*]]:221; NOUNROLL-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8222; NOUNROLL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[START]], i64 8) ]223; NOUNROLL-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 8224; NOUNROLL-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8225; NOUNROLL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]226; NOUNROLL-NEXT: br label %[[LOOP_HEADER:.*]]227; NOUNROLL: [[LOOP_HEADER]]:228; NOUNROLL-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]229; NOUNROLL-NEXT: [[L:%.*]] = load ptr, ptr [[PTR_IV]], align 8230; NOUNROLL-NEXT: [[C_1:%.*]] = icmp eq ptr [[L]], [[TGT]]231; NOUNROLL-NEXT: br i1 [[C_1]], label %[[EXIT:.*]], label %[[LOOP_LATCH]]232; NOUNROLL: [[LOOP_LATCH]]:233; NOUNROLL-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 8234; NOUNROLL-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]235; NOUNROLL-NEXT: br i1 [[C_2]], label %[[EXIT]], label %[[LOOP_HEADER]]236; NOUNROLL: [[EXIT]]:237; NOUNROLL-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]238; NOUNROLL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]239; NOUNROLL-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]240; NOUNROLL-NEXT: ret i1 [[C_3]]241;242entry:243 %start = load ptr, ptr %vec, align 8244 call void @llvm.assume(i1 true) [ "align"(ptr %start, i64 8) ]245 %gep.end = getelementptr inbounds nuw i8, ptr %vec, i64 8246 %end = load ptr, ptr %gep.end, align 8247 call void @llvm.assume(i1 true) [ "align"(ptr %end, i64 8) ]248 br label %loop.header249 250loop.header:251 %ptr.iv = phi ptr [ %ptr.iv.next, %loop.latch ], [ %start, %entry ]252 %l = load ptr, ptr %ptr.iv, align 8253 %c.1 = icmp eq ptr %l, %tgt254 br i1 %c.1, label %exit, label %loop.latch255 256loop.latch:257 %ptr.iv.next = getelementptr inbounds nuw i8, ptr %ptr.iv, i64 8258 %c.2 = icmp eq ptr %ptr.iv.next, %end259 br i1 %c.2, label %exit, label %loop.header260 261exit:262 %res = phi ptr [ %ptr.iv, %loop.header ], [ %end, %loop.latch ]263 call void @llvm.assume(i1 true) [ "align"(ptr %end, i64 8) ]264 %c.3 = icmp eq ptr %res, %end265 ret i1 %c.3266}267 268define i1 @multi_2_exit_find_i8_loop_too_large(ptr %vec, i8 %tgt) {269; APPLE-LABEL: define i1 @multi_2_exit_find_i8_loop_too_large(270; APPLE-SAME: ptr [[VEC:%.*]], i8 [[TGT:%.*]]) #[[ATTR0]] {271; APPLE-NEXT: [[ENTRY:.*]]:272; APPLE-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8273; APPLE-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 1274; APPLE-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8275; APPLE-NEXT: br label %[[LOOP_HEADER:.*]]276; APPLE: [[LOOP_HEADER]]:277; APPLE-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]278; APPLE-NEXT: [[L:%.*]] = load i8, ptr [[PTR_IV]], align 8279; APPLE-NEXT: [[UDIV:%.*]] = udiv i8 [[L]], [[TGT]]280; APPLE-NEXT: [[UDIV_2:%.*]] = udiv i8 [[UDIV]], 10281; APPLE-NEXT: [[C_1:%.*]] = icmp eq i8 [[UDIV_2]], 2282; APPLE-NEXT: br i1 [[C_1]], label %[[EXIT:.*]], label %[[LOOP_LATCH]]283; APPLE: [[LOOP_LATCH]]:284; APPLE-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 1285; APPLE-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]286; APPLE-NEXT: br i1 [[C_2]], label %[[EXIT]], label %[[LOOP_HEADER]]287; APPLE: [[EXIT]]:288; APPLE-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]289; APPLE-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]290; APPLE-NEXT: ret i1 [[C_3]]291;292; NOUNROLL-LABEL: define i1 @multi_2_exit_find_i8_loop_too_large(293; NOUNROLL-SAME: ptr [[VEC:%.*]], i8 [[TGT:%.*]]) #[[ATTR0]] {294; NOUNROLL-NEXT: [[ENTRY:.*]]:295; NOUNROLL-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8296; NOUNROLL-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 1297; NOUNROLL-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8298; NOUNROLL-NEXT: br label %[[LOOP_HEADER:.*]]299; NOUNROLL: [[LOOP_HEADER]]:300; NOUNROLL-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]301; NOUNROLL-NEXT: [[L:%.*]] = load i8, ptr [[PTR_IV]], align 8302; NOUNROLL-NEXT: [[UDIV:%.*]] = udiv i8 [[L]], [[TGT]]303; NOUNROLL-NEXT: [[UDIV_2:%.*]] = udiv i8 [[UDIV]], 10304; NOUNROLL-NEXT: [[C_1:%.*]] = icmp eq i8 [[UDIV_2]], 2305; NOUNROLL-NEXT: br i1 [[C_1]], label %[[EXIT:.*]], label %[[LOOP_LATCH]]306; NOUNROLL: [[LOOP_LATCH]]:307; NOUNROLL-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 1308; NOUNROLL-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]309; NOUNROLL-NEXT: br i1 [[C_2]], label %[[EXIT]], label %[[LOOP_HEADER]]310; NOUNROLL: [[EXIT]]:311; NOUNROLL-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]312; NOUNROLL-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]313; NOUNROLL-NEXT: ret i1 [[C_3]]314;315entry:316 %start = load ptr, ptr %vec, align 8317 %gep.end = getelementptr inbounds nuw i8, ptr %vec, i64 1318 %end = load ptr, ptr %gep.end, align 8319 br label %loop.header320 321loop.header:322 %ptr.iv = phi ptr [ %ptr.iv.next, %loop.latch ], [ %start, %entry ]323 %l = load i8, ptr %ptr.iv, align 8324 %udiv = udiv i8 %l, %tgt325 %udiv.2 = udiv i8 %udiv, 10326 %c.1 = icmp eq i8 %udiv.2, 2327 br i1 %c.1, label %exit, label %loop.latch328 329loop.latch:330 %ptr.iv.next = getelementptr inbounds nuw i8, ptr %ptr.iv, i64 1331 %c.2 = icmp eq ptr %ptr.iv.next, %end332 br i1 %c.2, label %exit, label %loop.header333 334exit:335 %res = phi ptr [ %ptr.iv, %loop.header ], [ %end, %loop.latch ]336 %c.3 = icmp eq ptr %res, %end337 ret i1 %c.3338}339 340define i1 @multi_3_exit_find_ptr_loop(ptr %vec, ptr %tgt, ptr %tgt2) {341; APPLE-LABEL: define i1 @multi_3_exit_find_ptr_loop(342; APPLE-SAME: ptr [[VEC:%.*]], ptr [[TGT:%.*]], ptr [[TGT2:%.*]]) #[[ATTR0]] {343; APPLE-NEXT: [[ENTRY:.*]]:344; APPLE-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8345; APPLE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[START]], i64 8) ]346; APPLE-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 8347; APPLE-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8348; APPLE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]349; APPLE-NEXT: br label %[[LOOP_HEADER:.*]]350; APPLE: [[LOOP_HEADER]]:351; APPLE-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]352; APPLE-NEXT: [[L:%.*]] = load ptr, ptr [[PTR_IV]], align 8353; APPLE-NEXT: [[C_1:%.*]] = icmp eq ptr [[L]], [[TGT]]354; APPLE-NEXT: [[C_2:%.*]] = icmp eq ptr [[L]], [[TGT2]]355; APPLE-NEXT: [[OR_COND:%.*]] = select i1 [[C_1]], i1 true, i1 [[C_2]]356; APPLE-NEXT: br i1 [[OR_COND]], label %[[EXIT:.*]], label %[[LOOP_LATCH]]357; APPLE: [[LOOP_LATCH]]:358; APPLE-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 8359; APPLE-NEXT: [[C_3:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]360; APPLE-NEXT: br i1 [[C_3]], label %[[EXIT]], label %[[LOOP_HEADER]]361; APPLE: [[EXIT]]:362; APPLE-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]363; APPLE-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]364; APPLE-NEXT: [[C_4:%.*]] = icmp eq ptr [[RES]], [[END]]365; APPLE-NEXT: ret i1 [[C_4]]366;367; NOUNROLL-LABEL: define i1 @multi_3_exit_find_ptr_loop(368; NOUNROLL-SAME: ptr [[VEC:%.*]], ptr [[TGT:%.*]], ptr [[TGT2:%.*]]) #[[ATTR0]] {369; NOUNROLL-NEXT: [[ENTRY:.*]]:370; NOUNROLL-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8371; NOUNROLL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[START]], i64 8) ]372; NOUNROLL-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 8373; NOUNROLL-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8374; NOUNROLL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]375; NOUNROLL-NEXT: br label %[[LOOP_HEADER:.*]]376; NOUNROLL: [[LOOP_HEADER]]:377; NOUNROLL-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]378; NOUNROLL-NEXT: [[L:%.*]] = load ptr, ptr [[PTR_IV]], align 8379; NOUNROLL-NEXT: [[C_1:%.*]] = icmp eq ptr [[L]], [[TGT]]380; NOUNROLL-NEXT: [[C_2:%.*]] = icmp eq ptr [[L]], [[TGT2]]381; NOUNROLL-NEXT: [[OR_COND:%.*]] = select i1 [[C_1]], i1 true, i1 [[C_2]]382; NOUNROLL-NEXT: br i1 [[OR_COND]], label %[[EXIT:.*]], label %[[LOOP_LATCH]]383; NOUNROLL: [[LOOP_LATCH]]:384; NOUNROLL-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 8385; NOUNROLL-NEXT: [[C_3:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]386; NOUNROLL-NEXT: br i1 [[C_3]], label %[[EXIT]], label %[[LOOP_HEADER]]387; NOUNROLL: [[EXIT]]:388; NOUNROLL-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]389; NOUNROLL-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[END]], i64 8) ]390; NOUNROLL-NEXT: [[C_4:%.*]] = icmp eq ptr [[RES]], [[END]]391; NOUNROLL-NEXT: ret i1 [[C_4]]392;393entry:394 %start = load ptr, ptr %vec, align 8395 call void @llvm.assume(i1 true) [ "align"(ptr %start, i64 8) ]396 %gep.end = getelementptr inbounds nuw i8, ptr %vec, i64 8397 %end = load ptr, ptr %gep.end, align 8398 call void @llvm.assume(i1 true) [ "align"(ptr %end, i64 8) ]399 br label %loop.header400 401loop.header:402 %ptr.iv = phi ptr [ %ptr.iv.next, %loop.latch ], [ %start, %entry ]403 %l = load ptr, ptr %ptr.iv, align 8404 %c.1 = icmp eq ptr %l, %tgt405 br i1 %c.1, label %exit, label %then406 407then:408 %c.2 = icmp eq ptr %l, %tgt2409 br i1 %c.2, label %exit, label %loop.latch410 411loop.latch:412 %ptr.iv.next = getelementptr inbounds nuw i8, ptr %ptr.iv, i64 8413 %c.3 = icmp eq ptr %ptr.iv.next, %end414 br i1 %c.3, label %exit, label %loop.header415 416exit:417 %res = phi ptr [ %ptr.iv, %loop.header ], [ %ptr.iv, %then], [ %end, %loop.latch ]418 call void @llvm.assume(i1 true) [ "align"(ptr %end, i64 8) ]419 %c.4 = icmp eq ptr %res, %end420 ret i1 %c.4421}422 423define i1 @multi_3_exit_find_i8_loop_switch(ptr %vec, i8 %tgt) {424; APPLE-LABEL: define i1 @multi_3_exit_find_i8_loop_switch(425; APPLE-SAME: ptr [[VEC:%.*]], i8 [[TGT:%.*]]) #[[ATTR0]] {426; APPLE-NEXT: [[ENTRY:.*]]:427; APPLE-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8428; APPLE-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 1429; APPLE-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8430; APPLE-NEXT: br label %[[LOOP_HEADER:.*]]431; APPLE: [[LOOP_HEADER]]:432; APPLE-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]433; APPLE-NEXT: [[L:%.*]] = load i8, ptr [[PTR_IV]], align 8434; APPLE-NEXT: switch i8 [[L]], label %[[LOOP_LATCH]] [435; APPLE-NEXT: i8 0, label %[[EXIT_1:.*]]436; APPLE-NEXT: i8 1, label %[[EXIT_2:.*]]437; APPLE-NEXT: i8 2, label %[[EXIT:.*]]438; APPLE-NEXT: ]439; APPLE: [[LOOP_LATCH]]:440; APPLE-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 1441; APPLE-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]442; APPLE-NEXT: br i1 [[C_2]], label %[[EXIT]], label %[[LOOP_HEADER]]443; APPLE: [[EXIT]]:444; APPLE-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]445; APPLE-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]446; APPLE-NEXT: ret i1 [[C_3]]447; APPLE: [[EXIT_1]]:448; APPLE-NEXT: ret i1 false449; APPLE: [[EXIT_2]]:450; APPLE-NEXT: ret i1 true451;452; NOUNROLL-LABEL: define i1 @multi_3_exit_find_i8_loop_switch(453; NOUNROLL-SAME: ptr [[VEC:%.*]], i8 [[TGT:%.*]]) #[[ATTR0]] {454; NOUNROLL-NEXT: [[ENTRY:.*]]:455; NOUNROLL-NEXT: [[START:%.*]] = load ptr, ptr [[VEC]], align 8456; NOUNROLL-NEXT: [[GEP_END:%.*]] = getelementptr inbounds nuw i8, ptr [[VEC]], i64 1457; NOUNROLL-NEXT: [[END:%.*]] = load ptr, ptr [[GEP_END]], align 8458; NOUNROLL-NEXT: br label %[[LOOP_HEADER:.*]]459; NOUNROLL: [[LOOP_HEADER]]:460; NOUNROLL-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ], [ [[START]], %[[ENTRY]] ]461; NOUNROLL-NEXT: [[L:%.*]] = load i8, ptr [[PTR_IV]], align 8462; NOUNROLL-NEXT: switch i8 [[L]], label %[[LOOP_LATCH]] [463; NOUNROLL-NEXT: i8 0, label %[[EXIT_1:.*]]464; NOUNROLL-NEXT: i8 1, label %[[EXIT_2:.*]]465; NOUNROLL-NEXT: i8 2, label %[[EXIT:.*]]466; NOUNROLL-NEXT: ]467; NOUNROLL: [[LOOP_LATCH]]:468; NOUNROLL-NEXT: [[PTR_IV_NEXT]] = getelementptr inbounds nuw i8, ptr [[PTR_IV]], i64 1469; NOUNROLL-NEXT: [[C_2:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]470; NOUNROLL-NEXT: br i1 [[C_2]], label %[[EXIT]], label %[[LOOP_HEADER]]471; NOUNROLL: [[EXIT]]:472; NOUNROLL-NEXT: [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP_HEADER]] ], [ [[END]], %[[LOOP_LATCH]] ]473; NOUNROLL-NEXT: [[C_3:%.*]] = icmp eq ptr [[RES]], [[END]]474; NOUNROLL-NEXT: ret i1 [[C_3]]475; NOUNROLL: [[EXIT_1]]:476; NOUNROLL-NEXT: ret i1 false477; NOUNROLL: [[EXIT_2]]:478; NOUNROLL-NEXT: ret i1 true479;480entry:481 %start = load ptr, ptr %vec, align 8482 %gep.end = getelementptr inbounds nuw i8, ptr %vec, i64 1483 %end = load ptr, ptr %gep.end, align 8484 br label %loop.header485 486loop.header:487 %ptr.iv = phi ptr [ %ptr.iv.next, %loop.latch ], [ %start, %entry ]488 %l = load i8, ptr %ptr.iv, align 8489 switch i8 %l, label %loop.latch [490 i8 0, label %exit.1491 i8 1, label %exit.2492 i8 2, label %exit ]493 494loop.latch:495 %ptr.iv.next = getelementptr inbounds nuw i8, ptr %ptr.iv, i64 1496 %c.2 = icmp eq ptr %ptr.iv.next, %end497 br i1 %c.2, label %exit, label %loop.header498 499exit:500 %res = phi ptr [ %ptr.iv, %loop.header ], [ %end, %loop.latch ]501 %c.3 = icmp eq ptr %res, %end502 ret i1 %c.3503 504exit.1:505 ret i1 0506 507exit.2:508 ret i1 1509}510 511declare void @llvm.assume(i1 noundef)512