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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 52; RUN: opt -p loop-vectorize -S %s | FileCheck %s3 4target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"5target triple = "x86_64-unknown-linux-gnu"6 7; Test case for https://github.com/llvm/llvm-project/issues/109581.8define i32 @unused_blend_after_unrolling(ptr %p, i32 %a, i1 %c.1, i16 %x, i16 %y) {9; CHECK-LABEL: define i32 @unused_blend_after_unrolling(10; CHECK-SAME: ptr [[P:%.*]], i32 [[A:%.*]], i1 [[C_1:%.*]], i16 [[X:%.*]], i16 [[Y:%.*]]) {11; CHECK-NEXT: [[ENTRY:.*:]]12; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[A]], 013; CHECK-NEXT: br label %[[VECTOR_PH:.*]]14; CHECK: [[VECTOR_PH]]:15; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C_1]], i64 016; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer17; CHECK-NEXT: [[BROADCAST_SPLATINSERT16:%.*]] = insertelement <4 x i1> poison, i1 [[C]], i64 018; CHECK-NEXT: [[BROADCAST_SPLAT17:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT16]], <4 x i1> poison, <4 x i32> zeroinitializer19; CHECK-NEXT: [[TMP0:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT]], splat (i1 true)20; CHECK-NEXT: [[TMP22:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT17]], splat (i1 true)21; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]22; CHECK: [[VECTOR_BODY]]:23; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_SDIV_CONTINUE17:.*]] ]24; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP24:%.*]], %[[PRED_SDIV_CONTINUE17]] ]25; CHECK-NEXT: [[VEC_PHI3:%.*]] = phi <4 x i1> [ zeroinitializer, %[[VECTOR_PH]] ], [ [[TMP25:%.*]], %[[PRED_SDIV_CONTINUE17]] ]26; CHECK-NEXT: [[TMP2:%.*]] = extractelement <4 x i1> [[TMP0]], i32 027; CHECK-NEXT: br i1 [[TMP2]], label %[[PRED_SDIV_IF:.*]], label %[[PRED_SDIV_CONTINUE:.*]]28; CHECK: [[PRED_SDIV_IF]]:29; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE]]30; CHECK: [[PRED_SDIV_CONTINUE]]:31; CHECK-NEXT: [[TMP3:%.*]] = extractelement <4 x i1> [[TMP0]], i32 132; CHECK-NEXT: br i1 [[TMP3]], label %[[PRED_SDIV_IF4:.*]], label %[[PRED_SDIV_CONTINUE5:.*]]33; CHECK: [[PRED_SDIV_IF4]]:34; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE5]]35; CHECK: [[PRED_SDIV_CONTINUE5]]:36; CHECK-NEXT: [[TMP4:%.*]] = extractelement <4 x i1> [[TMP0]], i32 237; CHECK-NEXT: br i1 [[TMP4]], label %[[PRED_SDIV_IF6:.*]], label %[[PRED_SDIV_CONTINUE7:.*]]38; CHECK: [[PRED_SDIV_IF6]]:39; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE7]]40; CHECK: [[PRED_SDIV_CONTINUE7]]:41; CHECK-NEXT: [[TMP5:%.*]] = extractelement <4 x i1> [[TMP0]], i32 342; CHECK-NEXT: br i1 [[TMP5]], label %[[PRED_SDIV_IF8:.*]], label %[[PRED_SDIV_CONTINUE9:.*]]43; CHECK: [[PRED_SDIV_IF8]]:44; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE9]]45; CHECK: [[PRED_SDIV_CONTINUE9]]:46; CHECK-NEXT: [[TMP6:%.*]] = extractelement <4 x i1> [[TMP0]], i32 047; CHECK-NEXT: br i1 [[TMP6]], label %[[PRED_SDIV_IF10:.*]], label %[[PRED_SDIV_CONTINUE11:.*]]48; CHECK: [[PRED_SDIV_IF10]]:49; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE11]]50; CHECK: [[PRED_SDIV_CONTINUE11]]:51; CHECK-NEXT: [[TMP10:%.*]] = extractelement <4 x i1> [[TMP0]], i32 152; CHECK-NEXT: br i1 [[TMP10]], label %[[PRED_SDIV_IF12:.*]], label %[[PRED_SDIV_CONTINUE13:.*]]53; CHECK: [[PRED_SDIV_IF12]]:54; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE13]]55; CHECK: [[PRED_SDIV_CONTINUE13]]:56; CHECK-NEXT: [[TMP14:%.*]] = extractelement <4 x i1> [[TMP0]], i32 257; CHECK-NEXT: br i1 [[TMP14]], label %[[PRED_SDIV_IF14:.*]], label %[[PRED_SDIV_CONTINUE15:.*]]58; CHECK: [[PRED_SDIV_IF14]]:59; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE15]]60; CHECK: [[PRED_SDIV_CONTINUE15]]:61; CHECK-NEXT: [[TMP18:%.*]] = extractelement <4 x i1> [[TMP0]], i32 362; CHECK-NEXT: br i1 [[TMP18]], label %[[PRED_SDIV_IF16:.*]], label %[[PRED_SDIV_CONTINUE17]]63; CHECK: [[PRED_SDIV_IF16]]:64; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE17]]65; CHECK: [[PRED_SDIV_CONTINUE17]]:66; CHECK-NEXT: [[TMP24]] = or <4 x i1> [[VEC_PHI]], [[TMP22]]67; CHECK-NEXT: [[TMP25]] = or <4 x i1> [[VEC_PHI3]], [[TMP22]]68; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 869; CHECK-NEXT: [[TMP26:%.*]] = icmp eq i32 [[INDEX_NEXT]], 9670; CHECK-NEXT: br i1 [[TMP26]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]71; CHECK: [[MIDDLE_BLOCK]]:72; CHECK-NEXT: [[BIN_RDX:%.*]] = or <4 x i1> [[TMP25]], [[TMP24]]73; CHECK-NEXT: [[TMP27:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[BIN_RDX]])74; CHECK-NEXT: [[TMP28:%.*]] = freeze i1 [[TMP27]]75; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP28]], i32 0, i32 076; CHECK-NEXT: br label %[[SCALAR_PH:.*]]77; CHECK: [[SCALAR_PH]]:78; CHECK-NEXT: br label %[[LOOP_HEADER:.*]]79; CHECK: [[LOOP_HEADER]]:80; CHECK-NEXT: [[B:%.*]] = phi i32 [ [[RDX_SELECT]], %[[SCALAR_PH]] ], [ [[SEL:%.*]], %[[LOOP_LATCH:.*]] ]81; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 97, %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH]] ]82; CHECK-NEXT: br i1 [[C_1]], label %[[LOOP_LATCH]], label %[[THEN:.*]]83; CHECK: [[THEN]]:84; CHECK-NEXT: [[DIV:%.*]] = sdiv i16 [[X]], [[Y]]85; CHECK-NEXT: br label %[[LOOP_LATCH]]86; CHECK: [[LOOP_LATCH]]:87; CHECK-NEXT: [[BLEND:%.*]] = phi i16 [ [[DIV]], %[[THEN]] ], [ 0, %[[LOOP_HEADER]] ]88; CHECK-NEXT: [[SEL]] = select i1 [[C]], i32 [[B]], i32 089; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 190; CHECK-NEXT: [[EC:%.*]] = icmp eq i32 [[IV]], 10091; CHECK-NEXT: br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP_HEADER]], !llvm.loop [[LOOP3:![0-9]+]]92; CHECK: [[EXIT]]:93; CHECK-NEXT: [[BLEND_LCSSA:%.*]] = phi i16 [ [[BLEND]], %[[LOOP_LATCH]] ]94; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP_LATCH]] ]95; CHECK-NEXT: store i16 [[BLEND_LCSSA]], ptr [[P]], align 296; CHECK-NEXT: ret i32 [[SEL_LCSSA]]97;98entry:99 %c = icmp eq i32 %a, 0100 br label %loop.header101 102loop.header:103 %b = phi i32 [ 0, %entry ], [ %sel, %loop.latch ]104 %iv = phi i32 [ 1, %entry ], [ %iv.next, %loop.latch ]105 br i1 %c.1, label %loop.latch, label %then106 107then:108 %div = sdiv i16 %x, %y109 br label %loop.latch110 111loop.latch:112 %blend = phi i16 [ %div, %then ], [ 0, %loop.header ]113 %sel = select i1 %c, i32 %b, i32 0114 %iv.next = add i32 %iv, 1115 %ec = icmp eq i32 %iv, 100116 br i1 %ec, label %exit, label %loop.header117 118exit:119 store i16 %blend, ptr %p, align 2120 ret i32 %sel121}122;.123; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}124; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}125; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}126; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}127;.128