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llvm-project/llvm/test/Transforms/LoopVectorize/X86/epilog-vectorization-inductions.ll
Florian Hahn eee9755881
[LV] Refine check to find epilogue IV resume value. 
Make sure to check that the vector trip count is containedin the list of
incoming values to serve as tie-breaker with phis with all-zero incoming
values.

Fixes https://github.com/llvm/llvm-project/issues/151686.
2025-08-01 20:54:39 +01:00

328 lines
21 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-vectorize -mcpu=znver2 -S %s | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
define void @test_pr59459(i64 %iv.start, ptr %arr) {
; CHECK-LABEL: @test_pr59459(
; CHECK-NEXT: iter.check:
; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[IV_START:%.*]] to i32
; CHECK-NEXT: [[SMAX1:%.*]] = call i32 @llvm.smax.i32(i32 [[TMP0]], i32 92)
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[SMAX1]], [[TMP0]]
; CHECK-NEXT: [[TMP2:%.*]] = zext i32 [[TMP1]] to i64
; CHECK-NEXT: [[TMP3:%.*]] = add nuw nsw i64 [[TMP2]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP3]], 4
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_SCEVCHECK:%.*]]
; CHECK: vector.scevcheck:
; CHECK-NEXT: [[TMP4:%.*]] = trunc i64 [[IV_START]] to i32
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[TMP4]], i32 92)
; CHECK-NEXT: [[TMP5:%.*]] = sub i32 [[SMAX]], [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = add i32 [[TMP4]], -1
; CHECK-NEXT: [[TMP7:%.*]] = add i32 [[TMP6]], [[TMP5]]
; CHECK-NEXT: [[TMP8:%.*]] = icmp ult i32 [[TMP7]], [[TMP6]]
; CHECK-NEXT: br i1 [[TMP8]], label [[VEC_EPILOG_SCALAR_PH]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
; CHECK: vector.main.loop.iter.check:
; CHECK-NEXT: [[MIN_ITERS_CHECK2:%.*]] = icmp ult i64 [[TMP3]], 16
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK2]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[TMP3]], 16
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[TMP3]], [[N_MOD_VF]]
; CHECK-NEXT: [[IND_END:%.*]] = add i64 [[IV_START]], [[N_VEC]]
; CHECK-NEXT: [[TMP9:%.*]] = trunc i64 [[IV_START]] to i32
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <16 x i32> poison, i32 [[TMP9]], i64 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <16 x i32> [[DOTSPLATINSERT]], <16 x i32> poison, <16 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION:%.*]] = add <16 x i32> [[DOTSPLAT]], <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <16 x i32> [ [[INDUCTION]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[OFFSET_IDX:%.*]] = add i64 [[IV_START]], [[INDEX]]
; CHECK-NEXT: [[TMP10:%.*]] = trunc i64 [[OFFSET_IDX]] to i32
; CHECK-NEXT: [[TMP12:%.*]] = add i32 [[TMP10]], -1
; CHECK-NEXT: [[TMP13:%.*]] = mul <16 x i32> [[VEC_IND]], splat (i32 196608)
; CHECK-NEXT: [[TMP14:%.*]] = lshr exact <16 x i32> [[TMP13]], splat (i32 16)
; CHECK-NEXT: [[TMP15:%.*]] = trunc <16 x i32> [[TMP14]] to <16 x i16>
; CHECK-NEXT: [[TMP16:%.*]] = zext i32 [[TMP12]] to i64
; CHECK-NEXT: [[TMP17:%.*]] = getelementptr i16, ptr [[ARR:%.*]], i64 [[TMP16]]
; CHECK-NEXT: store <16 x i16> [[TMP15]], ptr [[TMP17]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 16
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <16 x i32> [[VEC_IND]], splat (i32 16)
; CHECK-NEXT: [[TMP19:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP19]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[TMP3]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK: vec.epilog.iter.check:
; CHECK-NEXT: [[IND_END6:%.*]] = add i64 [[IV_START]], [[N_VEC]]
; CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i64 [[TMP3]], [[N_VEC]]
; CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 4
; CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK: vec.epilog.ph:
; CHECK-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ [[IND_END]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[IV_START]], [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[N_MOD_VF3:%.*]] = urem i64 [[TMP3]], 4
; CHECK-NEXT: [[N_VEC4:%.*]] = sub i64 [[TMP3]], [[N_MOD_VF3]]
; CHECK-NEXT: [[IND_END5:%.*]] = add i64 [[IV_START]], [[N_VEC4]]
; CHECK-NEXT: [[TMP20:%.*]] = trunc i64 [[BC_RESUME_VAL]] to i32
; CHECK-NEXT: [[DOTSPLATINSERT9:%.*]] = insertelement <4 x i32> poison, i32 [[TMP20]], i64 0
; CHECK-NEXT: [[DOTSPLAT10:%.*]] = shufflevector <4 x i32> [[DOTSPLATINSERT9]], <4 x i32> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION11:%.*]] = add <4 x i32> [[DOTSPLAT10]], <i32 0, i32 1, i32 2, i32 3>
; CHECK-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK: vec.epilog.vector.body:
; CHECK-NEXT: [[INDEX8:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT15:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND12:%.*]] = phi <4 x i32> [ [[INDUCTION11]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT13:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[OFFSET_IDX14:%.*]] = add i64 [[IV_START]], [[INDEX8]]
; CHECK-NEXT: [[TMP21:%.*]] = trunc i64 [[OFFSET_IDX14]] to i32
; CHECK-NEXT: [[TMP23:%.*]] = add i32 [[TMP21]], -1
; CHECK-NEXT: [[TMP24:%.*]] = mul <4 x i32> [[VEC_IND12]], splat (i32 196608)
; CHECK-NEXT: [[TMP25:%.*]] = lshr exact <4 x i32> [[TMP24]], splat (i32 16)
; CHECK-NEXT: [[TMP26:%.*]] = trunc <4 x i32> [[TMP25]] to <4 x i16>
; CHECK-NEXT: [[TMP27:%.*]] = zext i32 [[TMP23]] to i64
; CHECK-NEXT: [[TMP28:%.*]] = getelementptr i16, ptr [[ARR]], i64 [[TMP27]]
; CHECK-NEXT: store <4 x i16> [[TMP26]], ptr [[TMP28]], align 2
; CHECK-NEXT: [[INDEX_NEXT15]] = add nuw i64 [[INDEX8]], 4
; CHECK-NEXT: [[VEC_IND_NEXT13]] = add <4 x i32> [[VEC_IND12]], splat (i32 4)
; CHECK-NEXT: [[TMP30:%.*]] = icmp eq i64 [[INDEX_NEXT15]], [[N_VEC4]]
; CHECK-NEXT: br i1 [[TMP30]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK: vec.epilog.middle.block:
; CHECK-NEXT: [[CMP_N16:%.*]] = icmp eq i64 [[TMP3]], [[N_VEC4]]
; CHECK-NEXT: br i1 [[CMP_N16]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK: vec.epilog.scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL7:%.*]] = phi i64 [ [[IND_END5]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END6]], [[VEC_EPILOG_ITER_CHECK]] ], [ [[IV_START]], [[VECTOR_SCEVCHECK]] ], [ [[IV_START]], [[ITER_CHECK:%.*]] ]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL7]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[IV_TRUNC:%.*]] = trunc i64 [[IV]] to i32
; CHECK-NEXT: [[STORE_IDX:%.*]] = add i32 [[IV_TRUNC]], -1
; CHECK-NEXT: [[X:%.*]] = mul i32 [[IV_TRUNC]], 196608
; CHECK-NEXT: [[Y:%.*]] = lshr exact i32 [[X]], 16
; CHECK-NEXT: [[STORE_VAL:%.*]] = trunc i32 [[Y]] to i16
; CHECK-NEXT: [[STORE_IDX_WIDE:%.*]] = zext i32 [[STORE_IDX]] to i64
; CHECK-NEXT: [[ADDR:%.*]] = getelementptr i16, ptr [[ARR]], i64 [[STORE_IDX_WIDE]]
; CHECK-NEXT: store i16 [[STORE_VAL]], ptr [[ADDR]], align 2
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp sgt i32 [[IV_TRUNC]], 91
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv = phi i64 [ %iv.start, %entry ], [ %iv.next, %loop ]
%iv.trunc = trunc i64 %iv to i32
%store.idx = add i32 %iv.trunc, -1
%x = mul i32 %iv.trunc, 196608
%y = lshr exact i32 %x, 16
%store.val = trunc i32 %y to i16
%store.idx.wide = zext i32 %store.idx to i64
%addr = getelementptr i16, ptr %arr, i64 %store.idx.wide
store i16 %store.val, ptr %addr
%iv.next = add nuw nsw i64 %iv, 1
%loop.cond = icmp sgt i32 %iv.trunc, 91
br i1 %loop.cond, label %exit, label %loop
exit:
ret void
}
define void @test_induction_step_needs_expansion(ptr noalias %j, ptr %k, i64 %l, i16 %off) {
; CHECK-LABEL: @test_induction_step_needs_expansion(
; CHECK-NEXT: iter.check:
; CHECK-NEXT: [[TMP0:%.*]] = sub i16 0, [[OFF:%.*]]
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[L:%.*]], 8
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
; CHECK: vector.main.loop.iter.check:
; CHECK-NEXT: [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[L]], 64
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK1]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[L]], 64
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[L]], [[N_MOD_VF]]
; CHECK-NEXT: [[DOTSPLATINSERT2:%.*]] = insertelement <16 x i16> poison, i16 [[TMP0]], i64 0
; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <16 x i16> [[DOTSPLATINSERT2]], <16 x i16> poison, <16 x i32> zeroinitializer
; CHECK-NEXT: [[DOTCAST:%.*]] = trunc i64 [[N_VEC]] to i16
; CHECK-NEXT: [[IND_END:%.*]] = mul i16 [[DOTCAST]], [[TMP0]]
; CHECK-NEXT: [[TMP1:%.*]] = mul <16 x i16> splat (i16 16), [[TMP2]]
; CHECK-NEXT: [[BROADCAST_SPLATINSERT2:%.*]] = insertelement <16 x i16> poison, i16 [[OFF]], i64 0
; CHECK-NEXT: [[BROADCAST_SPLAT3:%.*]] = shufflevector <16 x i16> [[BROADCAST_SPLATINSERT2]], <16 x i16> poison, <16 x i32> zeroinitializer
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <16 x i16> poison, i16 [[TMP0]], i64 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <16 x i16> [[DOTSPLATINSERT]], <16 x i16> poison, <16 x i32> zeroinitializer
; CHECK-NEXT: [[TMP11:%.*]] = mul <16 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7, i16 8, i16 9, i16 10, i16 11, i16 12, i16 13, i16 14, i16 15>, [[DOTSPLAT]]
; CHECK-NEXT: [[INDUCTION:%.*]] = add <16 x i16> zeroinitializer, [[TMP11]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <16 x i16> [ [[INDUCTION]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[STEP_ADD:%.*]] = add <16 x i16> [[VEC_IND]], [[TMP1]]
; CHECK-NEXT: [[STEP_ADD_2:%.*]] = add <16 x i16> [[STEP_ADD]], [[TMP1]]
; CHECK-NEXT: [[STEP_ADD_3:%.*]] = add <16 x i16> [[STEP_ADD_2]], [[TMP1]]
; CHECK-NEXT: [[TMP4:%.*]] = sub <16 x i16> [[VEC_IND]], [[BROADCAST_SPLAT3]]
; CHECK-NEXT: [[TMP5:%.*]] = sub <16 x i16> [[STEP_ADD]], [[BROADCAST_SPLAT3]]
; CHECK-NEXT: [[TMP6:%.*]] = sub <16 x i16> [[STEP_ADD_2]], [[BROADCAST_SPLAT3]]
; CHECK-NEXT: [[TMP7:%.*]] = sub <16 x i16> [[STEP_ADD_3]], [[BROADCAST_SPLAT3]]
; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i16, ptr [[K:%.*]], i64 [[INDEX]]
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds i16, ptr [[TMP8]], i32 16
; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds i16, ptr [[TMP8]], i32 32
; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds i16, ptr [[TMP8]], i32 48
; CHECK-NEXT: store <16 x i16> [[TMP4]], ptr [[TMP8]], align 2
; CHECK-NEXT: store <16 x i16> [[TMP5]], ptr [[TMP10]], align 2
; CHECK-NEXT: store <16 x i16> [[TMP6]], ptr [[TMP21]], align 2
; CHECK-NEXT: store <16 x i16> [[TMP7]], ptr [[TMP12]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 64
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <16 x i16> [[STEP_ADD_3]], [[TMP1]]
; CHECK-NEXT: [[TMP13:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP13]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[L]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK: vec.epilog.iter.check:
; CHECK-NEXT: [[DOTCAST9:%.*]] = trunc i64 [[N_VEC]] to i16
; CHECK-NEXT: [[IND_END10:%.*]] = mul i16 [[DOTCAST9]], [[TMP0]]
; CHECK-NEXT: [[N_VEC_REMAINING:%.*]] = sub i64 [[L]], [[N_VEC]]
; CHECK-NEXT: [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_VEC_REMAINING]], 8
; CHECK-NEXT: br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK: vec.epilog.ph:
; CHECK-NEXT: [[BC_RESUME_VAL1:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ [[IND_END]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[N_MOD_VF4:%.*]] = urem i64 [[L]], 8
; CHECK-NEXT: [[N_VEC5:%.*]] = sub i64 [[L]], [[N_MOD_VF4]]
; CHECK-NEXT: [[DOTCAST7:%.*]] = trunc i64 [[N_VEC5]] to i16
; CHECK-NEXT: [[IND_END8:%.*]] = mul i16 [[DOTCAST7]], [[TMP0]]
; CHECK-NEXT: [[DOTSPLATINSERT13:%.*]] = insertelement <8 x i16> poison, i16 [[OFF]], i64 0
; CHECK-NEXT: [[DOTSPLAT14:%.*]] = shufflevector <8 x i16> [[DOTSPLATINSERT13]], <8 x i16> poison, <8 x i32> zeroinitializer
; CHECK-NEXT: [[DOTSPLATINSERT15:%.*]] = insertelement <8 x i16> poison, i16 [[BC_RESUME_VAL]], i64 0
; CHECK-NEXT: [[DOTSPLAT16:%.*]] = shufflevector <8 x i16> [[DOTSPLATINSERT15]], <8 x i16> poison, <8 x i32> zeroinitializer
; CHECK-NEXT: [[DOTSPLATINSERT14:%.*]] = insertelement <8 x i16> poison, i16 [[TMP0]], i64 0
; CHECK-NEXT: [[DOTSPLAT15:%.*]] = shufflevector <8 x i16> [[DOTSPLATINSERT14]], <8 x i16> poison, <8 x i32> zeroinitializer
; CHECK-NEXT: [[TMP22:%.*]] = mul <8 x i16> <i16 0, i16 1, i16 2, i16 3, i16 4, i16 5, i16 6, i16 7>, [[DOTSPLAT15]]
; CHECK-NEXT: [[INDUCTION17:%.*]] = add <8 x i16> [[DOTSPLAT16]], [[TMP22]]
; CHECK-NEXT: [[TMP15:%.*]] = mul i16 [[TMP0]], 8
; CHECK-NEXT: [[BROADCAST_SPLATINSERT22:%.*]] = insertelement <8 x i16> poison, i16 [[TMP15]], i64 0
; CHECK-NEXT: [[BROADCAST_SPLAT23:%.*]] = shufflevector <8 x i16> [[BROADCAST_SPLATINSERT22]], <8 x i16> poison, <8 x i32> zeroinitializer
; CHECK-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK: vec.epilog.vector.body:
; CHECK-NEXT: [[INDEX12:%.*]] = phi i64 [ [[BC_RESUME_VAL1]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT24:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND20:%.*]] = phi <8 x i16> [ [[INDUCTION17]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT21:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP17:%.*]] = sub <8 x i16> [[VEC_IND20]], [[DOTSPLAT14]]
; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds i16, ptr [[K]], i64 [[INDEX12]]
; CHECK-NEXT: store <8 x i16> [[TMP17]], ptr [[TMP18]], align 2
; CHECK-NEXT: [[INDEX_NEXT24]] = add nuw i64 [[INDEX12]], 8
; CHECK-NEXT: [[VEC_IND_NEXT21]] = add <8 x i16> [[VEC_IND20]], [[BROADCAST_SPLAT23]]
; CHECK-NEXT: [[TMP20:%.*]] = icmp eq i64 [[INDEX_NEXT24]], [[N_VEC5]]
; CHECK-NEXT: br i1 [[TMP20]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK: vec.epilog.middle.block:
; CHECK-NEXT: [[CMP_N25:%.*]] = icmp eq i64 [[L]], [[N_VEC5]]
; CHECK-NEXT: br i1 [[CMP_N25]], label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK: vec.epilog.scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL6:%.*]] = phi i64 [ [[N_VEC5]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT: [[BC_RESUME_VAL11:%.*]] = phi i16 [ [[IND_END8]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END10]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK]] ]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL6]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[P_09:%.*]] = phi i16 [ [[BC_RESUME_VAL11]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[ADD:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[ADD]] = sub i16 [[P_09]], [[OFF]]
; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds i16, ptr [[K]], i64 [[IV]]
; CHECK-NEXT: store i16 [[ADD]], ptr [[ARRAYIDX3]], align 2
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], [[L]]
; CHECK-NEXT: br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
%p.09 = phi i16 [ 0, %entry ], [ %add, %loop ]
%add = sub i16 %p.09, %off
%arrayidx3 = getelementptr inbounds i16, ptr %k, i64 %iv
store i16 %add, ptr %arrayidx3, align 2
%iv.next = add nuw nsw i64 %iv, 1
%ec = icmp eq i64 %iv.next, %l
br i1 %ec , label %exit, label %loop
exit:
ret void
}
; Test case for https://github.com/llvm/llvm-project/issues/151686.
define i8 @multiple_inductions_start_at_0() {
; CHECK-LABEL: @multiple_inductions_start_at_0(
; CHECK-NEXT: iter.check:
; CHECK-NEXT: br i1 false, label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
; CHECK: vector.main.loop.iter.check:
; CHECK-NEXT: br i1 false, label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <32 x i8> [ zeroinitializer, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[STEP_ADD:%.*]] = add <32 x i8> [[VEC_IND]], zeroinitializer
; CHECK-NEXT: [[STEP_ADD_2:%.*]] = add <32 x i8> [[STEP_ADD]], zeroinitializer
; CHECK-NEXT: [[STEP_ADD_3:%.*]] = add <32 x i8> [[STEP_ADD_2]], zeroinitializer
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 128
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <32 x i8> [[STEP_ADD_3]], zeroinitializer
; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1024
; CHECK-NEXT: br i1 [[TMP0]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[TMP1:%.*]] = extractelement <32 x i8> [[STEP_ADD_3]], i32 31
; CHECK-NEXT: br i1 false, label [[EXIT:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK: vec.epilog.iter.check:
; CHECK-NEXT: br i1 false, label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]]
; CHECK: vec.epilog.ph:
; CHECK-NEXT: [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i32 [ 1024, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ 0, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT: [[TMP2:%.*]] = trunc i32 [[BC_RESUME_VAL]] to i8
; CHECK-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i8> poison, i8 [[TMP2]], i64 0
; CHECK-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i8> [[BROADCAST_SPLATINSERT]], <4 x i8> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[INDUCTION:%.*]] = add <4 x i8> [[BROADCAST_SPLAT]], zeroinitializer
; CHECK-NEXT: br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK: vec.epilog.vector.body:
; CHECK-NEXT: [[INDEX1:%.*]] = phi i32 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT3:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND2:%.*]] = phi <4 x i8> [ [[INDUCTION]], [[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT4:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT: [[INDEX_NEXT3]] = add nuw i32 [[INDEX1]], 4
; CHECK-NEXT: [[VEC_IND_NEXT4]] = add <4 x i8> [[VEC_IND2]], zeroinitializer
; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i32 [[INDEX_NEXT3]], 1052
; CHECK-NEXT: br i1 [[TMP3]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK: vec.epilog.middle.block:
; CHECK-NEXT: [[TMP4:%.*]] = extractelement <4 x i8> [[VEC_IND2]], i32 3
; CHECK-NEXT: br i1 true, label [[EXIT]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK: vec.epilog.scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL5:%.*]] = phi i32 [ 1052, [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 1024, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT: [[BC_RESUME_VAL6:%.*]] = phi i32 [ -469762048, [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ 0, [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[ITER_CHECK]] ]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i32 [ [[BC_RESUME_VAL5]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[IV_2:%.*]] = phi i32 [ [[BC_RESUME_VAL6]], [[VEC_EPILOG_SCALAR_PH]] ], [ [[ADD:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[ADD]] = add i32 [[IV_2]], -16777216
; CHECK-NEXT: [[TRUNC:%.*]] = trunc i32 [[IV_2]] to i8
; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT: [[EC:%.*]] = icmp ugt i32 [[IV]], 1050
; CHECK-NEXT: br i1 [[EC]], label [[EXIT]], label [[LOOP]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: [[RES:%.*]] = phi i8 [ [[TRUNC]], [[LOOP]] ], [ [[TMP1]], [[MIDDLE_BLOCK]] ], [ [[TMP4]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT: ret i8 [[RES]]
;
entry:
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%iv.2 = phi i32 [ 0, %entry ], [ %add, %loop ]
%add = add i32 %iv.2, -16777216
%trunc = trunc i32 %iv.2 to i8
%iv.next = add i32 %iv, 1
%ec = icmp ugt i32 %iv, 1050
br i1 %ec, label %exit, label %loop
exit:
%res = phi i8 [ %trunc, %loop ]
ret i8 %res
}
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