1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 2; RUN: opt -p loop-vectorize -S %s | FileCheck %s 3 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]], 0 13; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]] 14; CHECK: [[VECTOR_PH]]: 15; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C_1]], i64 0 16; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer 17; CHECK-NEXT: [[TMP0:%.*]] = xor <4 x i1> [[BROADCAST_SPLAT]], splat (i1 true) 18; CHECK-NEXT: [[BROADCAST_SPLATINSERT16:%.*]] = insertelement <4 x i1> poison, i1 [[C]], i64 0 19; CHECK-NEXT: [[BROADCAST_SPLAT17:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT16]], <4 x i1> poison, <4 x i32> zeroinitializer 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 0 27; 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 1 32; 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 2 37; 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 3 42; 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 0 47; CHECK-NEXT: br i1 [[TMP6]], label %[[PRED_SDIV_IF10:.*]], label %[[PRED_SDIV_CONTINUE11:.*]] 48; CHECK: [[PRED_SDIV_IF10]]: 49; CHECK-NEXT: [[TMP7:%.*]] = sdiv i16 [[X]], [[Y]] 50; CHECK-NEXT: [[TMP8:%.*]] = insertelement <4 x i16> poison, i16 [[TMP7]], i32 0 51; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE11]] 52; CHECK: [[PRED_SDIV_CONTINUE11]]: 53; CHECK-NEXT: [[TMP9:%.*]] = phi <4 x i16> [ poison, %[[PRED_SDIV_CONTINUE9]] ], [ [[TMP8]], %[[PRED_SDIV_IF10]] ] 54; CHECK-NEXT: [[TMP10:%.*]] = extractelement <4 x i1> [[TMP0]], i32 1 55; CHECK-NEXT: br i1 [[TMP10]], label %[[PRED_SDIV_IF12:.*]], label %[[PRED_SDIV_CONTINUE13:.*]] 56; CHECK: [[PRED_SDIV_IF12]]: 57; CHECK-NEXT: [[TMP11:%.*]] = sdiv i16 [[X]], [[Y]] 58; CHECK-NEXT: [[TMP12:%.*]] = insertelement <4 x i16> [[TMP9]], i16 [[TMP11]], i32 1 59; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE13]] 60; CHECK: [[PRED_SDIV_CONTINUE13]]: 61; CHECK-NEXT: [[TMP13:%.*]] = phi <4 x i16> [ [[TMP9]], %[[PRED_SDIV_CONTINUE11]] ], [ [[TMP12]], %[[PRED_SDIV_IF12]] ] 62; CHECK-NEXT: [[TMP14:%.*]] = extractelement <4 x i1> [[TMP0]], i32 2 63; CHECK-NEXT: br i1 [[TMP14]], label %[[PRED_SDIV_IF14:.*]], label %[[PRED_SDIV_CONTINUE15:.*]] 64; CHECK: [[PRED_SDIV_IF14]]: 65; CHECK-NEXT: [[TMP15:%.*]] = sdiv i16 [[X]], [[Y]] 66; CHECK-NEXT: [[TMP16:%.*]] = insertelement <4 x i16> [[TMP13]], i16 [[TMP15]], i32 2 67; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE15]] 68; CHECK: [[PRED_SDIV_CONTINUE15]]: 69; CHECK-NEXT: [[TMP17:%.*]] = phi <4 x i16> [ [[TMP13]], %[[PRED_SDIV_CONTINUE13]] ], [ [[TMP16]], %[[PRED_SDIV_IF14]] ] 70; CHECK-NEXT: [[TMP18:%.*]] = extractelement <4 x i1> [[TMP0]], i32 3 71; CHECK-NEXT: br i1 [[TMP18]], label %[[PRED_SDIV_IF16:.*]], label %[[PRED_SDIV_CONTINUE17]] 72; CHECK: [[PRED_SDIV_IF16]]: 73; CHECK-NEXT: [[TMP19:%.*]] = sdiv i16 [[X]], [[Y]] 74; CHECK-NEXT: [[TMP20:%.*]] = insertelement <4 x i16> [[TMP17]], i16 [[TMP19]], i32 3 75; CHECK-NEXT: br label %[[PRED_SDIV_CONTINUE17]] 76; CHECK: [[PRED_SDIV_CONTINUE17]]: 77; CHECK-NEXT: [[TMP21:%.*]] = phi <4 x i16> [ [[TMP17]], %[[PRED_SDIV_CONTINUE15]] ], [ [[TMP20]], %[[PRED_SDIV_IF16]] ] 78; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[BROADCAST_SPLAT]], <4 x i16> zeroinitializer, <4 x i16> [[TMP21]] 79; CHECK-NEXT: [[TMP24]] = or <4 x i1> [[VEC_PHI]], [[TMP22]] 80; CHECK-NEXT: [[TMP25]] = or <4 x i1> [[VEC_PHI3]], [[TMP22]] 81; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 8 82; CHECK-NEXT: [[TMP26:%.*]] = icmp eq i32 [[INDEX_NEXT]], 96 83; CHECK-NEXT: br i1 [[TMP26]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] 84; CHECK: [[MIDDLE_BLOCK]]: 85; CHECK-NEXT: [[BIN_RDX:%.*]] = or <4 x i1> [[TMP25]], [[TMP24]] 86; CHECK-NEXT: [[TMP27:%.*]] = call i1 @llvm.vector.reduce.or.v4i1(<4 x i1> [[BIN_RDX]]) 87; CHECK-NEXT: [[TMP28:%.*]] = freeze i1 [[TMP27]] 88; CHECK-NEXT: [[RDX_SELECT:%.*]] = select i1 [[TMP28]], i32 0, i32 0 89; CHECK-NEXT: [[TMP29:%.*]] = extractelement <4 x i16> [[PREDPHI]], i32 3 90; CHECK-NEXT: br i1 false, label %[[EXIT:.*]], label %[[SCALAR_PH]] 91; CHECK: [[SCALAR_PH]]: 92; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = phi i32 [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ] 93; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ 97, %[[MIDDLE_BLOCK]] ], [ 1, %[[ENTRY]] ] 94; CHECK-NEXT: br label %[[LOOP_HEADER:.*]] 95; CHECK: [[LOOP_HEADER]]: 96; CHECK-NEXT: [[B:%.*]] = phi i32 [ [[BC_MERGE_RDX]], %[[SCALAR_PH]] ], [ [[SEL:%.*]], %[[LOOP_LATCH:.*]] ] 97; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH]] ] 98; CHECK-NEXT: br i1 [[C_1]], label %[[LOOP_LATCH]], label %[[THEN:.*]] 99; CHECK: [[THEN]]: 100; CHECK-NEXT: [[DIV:%.*]] = sdiv i16 [[X]], [[Y]] 101; CHECK-NEXT: br label %[[LOOP_LATCH]] 102; CHECK: [[LOOP_LATCH]]: 103; CHECK-NEXT: [[BLEND:%.*]] = phi i16 [ [[DIV]], %[[THEN]] ], [ 0, %[[LOOP_HEADER]] ] 104; CHECK-NEXT: [[SEL]] = select i1 [[C]], i32 [[B]], i32 0 105; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1 106; CHECK-NEXT: [[EC:%.*]] = icmp eq i32 [[IV]], 100 107; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP_HEADER]], !llvm.loop [[LOOP3:![0-9]+]] 108; CHECK: [[EXIT]]: 109; CHECK-NEXT: [[BLEND_LCSSA:%.*]] = phi i16 [ [[BLEND]], %[[LOOP_LATCH]] ], [ [[TMP29]], %[[MIDDLE_BLOCK]] ] 110; CHECK-NEXT: [[SEL_LCSSA:%.*]] = phi i32 [ [[SEL]], %[[LOOP_LATCH]] ], [ [[RDX_SELECT]], %[[MIDDLE_BLOCK]] ] 111; CHECK-NEXT: store i16 [[BLEND_LCSSA]], ptr [[P]], align 2 112; CHECK-NEXT: ret i32 [[SEL_LCSSA]] 113; 114entry: 115 %c = icmp eq i32 %a, 0 116 br label %loop.header 117 118loop.header: 119 %b = phi i32 [ 0, %entry ], [ %sel, %loop.latch ] 120 %iv = phi i32 [ 1, %entry ], [ %iv.next, %loop.latch ] 121 br i1 %c.1, label %loop.latch, label %then 122 123then: 124 %div = sdiv i16 %x, %y 125 br label %loop.latch 126 127loop.latch: 128 %blend = phi i16 [ %div, %then ], [ 0, %loop.header ] 129 %sel = select i1 %c, i32 %b, i32 0 130 %iv.next = add i32 %iv, 1 131 %ec = icmp eq i32 %iv, 100 132 br i1 %ec, label %exit, label %loop.header 133 134exit: 135 store i16 %blend, ptr %p, align 2 136 ret i32 %sel 137} 138;. 139; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]} 140; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1} 141; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"} 142; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]} 143;. 144