32c4493d5f
Follow-up as discussed when using VPInstruction::ResumePhi for all resume values (#112147). This patch explicitly adds incoming values for each predecessor in VPlan. This simplifies codegen and allows transformations adjusting the predecessors of blocks with NFC modulo incoming block order in phis.
119 lines
8.1 KiB
LLVM
119 lines
8.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; To test epilogue-vectorization we need to make sure that the vectorizer actually vectorizes the loop.
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; Without a target triple this becomes difficult, unless we force vectorization through user hints.
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; Currently user provided vectorization hints prevent epilogue vectorization unless the forced
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; VF is the same as the epilogue vectorization VF. To make these tests target independent we'll use a
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; trick where both VFs are forced to be the same value.
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; RUN: opt < %s -passes='loop-vectorize' -enable-epilogue-vectorization -force-vector-width=2 -epilogue-vectorization-force-VF=2 -S | FileCheck %s --check-prefix VF-TWO-CHECK
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target datalayout = "e-m:e-i64:64-n32:64"
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; Some limited forms of live-outs (non-reduction, non-recurrences) are supported.
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define signext i32 @f1(ptr noalias %A, ptr noalias %B, i32 signext %n) {
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; VF-TWO-CHECK-LABEL: @f1(
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; VF-TWO-CHECK-NEXT: entry:
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; VF-TWO-CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[N:%.*]], 0
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; VF-TWO-CHECK-NEXT: br i1 [[CMP1]], label [[ITER_CHECK:%.*]], label [[FOR_END:%.*]]
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; VF-TWO-CHECK: iter.check:
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; VF-TWO-CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext i32 [[N]] to i64
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; VF-TWO-CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[WIDE_TRIP_COUNT]], 2
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; VF-TWO-CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
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; VF-TWO-CHECK: vector.main.loop.iter.check:
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; VF-TWO-CHECK-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[WIDE_TRIP_COUNT]], 2
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; VF-TWO-CHECK-NEXT: br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
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; VF-TWO-CHECK: vector.ph:
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; VF-TWO-CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[WIDE_TRIP_COUNT]], 2
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; VF-TWO-CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[WIDE_TRIP_COUNT]], [[N_MOD_VF]]
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; VF-TWO-CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; VF-TWO-CHECK: vector.body:
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; VF-TWO-CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; VF-TWO-CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
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; VF-TWO-CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[TMP0]]
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; VF-TWO-CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[TMP1]], i32 0
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; VF-TWO-CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP2]], align 4
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; VF-TWO-CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[TMP0]]
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; VF-TWO-CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[TMP3]], i32 0
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; VF-TWO-CHECK-NEXT: [[WIDE_LOAD2:%.*]] = load <2 x i32>, ptr [[TMP4]], align 4
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; VF-TWO-CHECK-NEXT: [[TMP5:%.*]] = add nsw <2 x i32> [[WIDE_LOAD]], [[WIDE_LOAD2]]
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; VF-TWO-CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; VF-TWO-CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
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; VF-TWO-CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; VF-TWO-CHECK: middle.block:
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; VF-TWO-CHECK-NEXT: [[TMP7:%.*]] = extractelement <2 x i32> [[TMP5]], i32 1
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; VF-TWO-CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[WIDE_TRIP_COUNT]], [[N_VEC]]
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; VF-TWO-CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_END_LOOPEXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
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; VF-TWO-CHECK: vec.epilog.iter.check:
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; VF-TWO-CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i64 [[WIDE_TRIP_COUNT]], [[N_VEC]]
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; VF-TWO-CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 2
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; VF-TWO-CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
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; VF-TWO-CHECK: vec.epilog.ph:
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; VF-TWO-CHECK-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
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; VF-TWO-CHECK-NEXT: [[N_MOD_VF3:%.*]] = urem i64 [[WIDE_TRIP_COUNT]], 2
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; VF-TWO-CHECK-NEXT: [[N_VEC4:%.*]] = sub i64 [[WIDE_TRIP_COUNT]], [[N_MOD_VF3]]
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; VF-TWO-CHECK-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
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; VF-TWO-CHECK: vec.epilog.vector.body:
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; VF-TWO-CHECK-NEXT: [[INDEX6:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT9:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
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; VF-TWO-CHECK-NEXT: [[TMP8:%.*]] = add i64 [[INDEX6]], 0
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; VF-TWO-CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP8]]
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; VF-TWO-CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[TMP9]], i32 0
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; VF-TWO-CHECK-NEXT: [[WIDE_LOAD7:%.*]] = load <2 x i32>, ptr [[TMP10]], align 4
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; VF-TWO-CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[TMP8]]
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; VF-TWO-CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds i32, ptr [[TMP11]], i32 0
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; VF-TWO-CHECK-NEXT: [[WIDE_LOAD8:%.*]] = load <2 x i32>, ptr [[TMP12]], align 4
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; VF-TWO-CHECK-NEXT: [[TMP13:%.*]] = add nsw <2 x i32> [[WIDE_LOAD7]], [[WIDE_LOAD8]]
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; VF-TWO-CHECK-NEXT: [[INDEX_NEXT9]] = add nuw i64 [[INDEX6]], 2
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; VF-TWO-CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[INDEX_NEXT9]], [[N_VEC4]]
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; VF-TWO-CHECK-NEXT: br i1 [[TMP14]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
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; VF-TWO-CHECK: vec.epilog.middle.block:
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; VF-TWO-CHECK-NEXT: [[TMP15:%.*]] = extractelement <2 x i32> [[TMP13]], i32 1
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; VF-TWO-CHECK-NEXT: [[CMP_N5:%.*]] = icmp eq i64 [[WIDE_TRIP_COUNT]], [[N_VEC4]]
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; VF-TWO-CHECK-NEXT: br i1 [[CMP_N5]], label [[FOR_END_LOOPEXIT]], label [[VEC_EPILOG_SCALAR_PH]]
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; VF-TWO-CHECK: vec.epilog.scalar.ph:
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; VF-TWO-CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC4]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK]] ]
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; VF-TWO-CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; VF-TWO-CHECK: for.body:
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; VF-TWO-CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
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; VF-TWO-CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
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; VF-TWO-CHECK-NEXT: [[TMP16:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
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; VF-TWO-CHECK-NEXT: [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDVARS_IV]]
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; VF-TWO-CHECK-NEXT: [[TMP17:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
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; VF-TWO-CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP16]], [[TMP17]]
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; VF-TWO-CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
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; VF-TWO-CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[INDVARS_IV_NEXT]], [[WIDE_TRIP_COUNT]]
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; VF-TWO-CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT]], !llvm.loop [[LOOP4:![0-9]+]]
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; VF-TWO-CHECK: for.end.loopexit:
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; VF-TWO-CHECK-NEXT: [[ADD_LCSSA:%.*]] = phi i32 [ [[ADD]], [[FOR_BODY]] ], [ [[TMP7]], [[MIDDLE_BLOCK]] ], [ [[TMP15]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
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; VF-TWO-CHECK-NEXT: br label [[FOR_END]]
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; VF-TWO-CHECK: for.end:
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; VF-TWO-CHECK-NEXT: [[RES_0_LCSSA:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[ADD_LCSSA]], [[FOR_END_LOOPEXIT]] ]
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; VF-TWO-CHECK-NEXT: ret i32 [[RES_0_LCSSA]]
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;
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entry:
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%cmp1 = icmp sgt i32 %n, 0
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br i1 %cmp1, label %for.body.preheader, label %for.end
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for.body.preheader: ; preds = %entry
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%wide.trip.count = zext i32 %n to i64
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
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%0 = load i32, ptr %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, ptr %B, i64 %indvars.iv
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%1 = load i32, ptr %arrayidx2, align 4
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%add = add nsw i32 %0, %1
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp ne i64 %indvars.iv.next, %wide.trip.count
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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%add.lcssa = phi i32 [ %add, %for.body ]
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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%res.0.lcssa = phi i32 [ 0, %entry ], [ %add.lcssa, %for.end.loopexit ]
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ret i32 %res.0.lcssa
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}
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