Skip to content

Commit

Permalink
[VPlan] Mark recurrence recipes as not having side-effects.
Browse files Browse the repository at this point in the history 
Add support for FirstOrderRecurrenceSplice and VPFirstOrderRecurrencePHI
recipes to mayHaveSideEffects. They both don't have side-effects.
  • Loading branch information
@fhahn
fhahn committed Apr 17, 2023
1 parent fa1ab9e commit 02369b7
Show file tree
Hide file tree
Showing 2 changed files with 70 additions and 59 deletions.
9 changes: 9 additions & 0 deletions llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -109,13 +109,22 @@ bool VPRecipeBase::mayReadFromMemory() const {

bool VPRecipeBase::mayHaveSideEffects() const {
switch (getVPDefID()) {
case VPInstructionSC:
switch (cast<VPInstruction>(this)->getOpcode()) {
default:
return true;
case VPInstruction::FirstOrderRecurrenceSplice:
return false;
}
llvm_unreachable("unhandled opcode above");
case VPDerivedIVSC:
case VPPredInstPHISC:
return false;
case VPWidenCallSC:
return cast<Instruction>(getVPSingleValue()->getUnderlyingValue())
->mayHaveSideEffects();
case VPWidenIntOrFpInductionSC:
case VPFirstOrderRecurrencePHISC:
case VPWidenPointerInductionSC:
case VPWidenCanonicalIVSC:
case VPWidenPHISC:
Expand Down
120 changes: 61 additions & 59 deletions llvm/test/Transforms/LoopVectorize/first-order-recurrence.ll
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2618,18 +2618,20 @@ define void @sink_dead_inst(ptr %a) {
; UNROLL-NO-IC-NEXT: [[TMP9]] = add <4 x i16> [[TMP3]], <i16 5, i16 5, i16 5, i16 5>
; UNROLL-NO-IC-NEXT: [[TMP10:%.*]] = shufflevector <4 x i16> [[VECTOR_RECUR]], <4 x i16> [[TMP8]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; UNROLL-NO-IC-NEXT: [[TMP11:%.*]] = shufflevector <4 x i16> [[TMP8]], <4 x i16> [[TMP9]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; UNROLL-NO-IC-NEXT: [[TMP12:%.*]] = sub <4 x i16> [[TMP10]], <i16 10, i16 10, i16 10, i16 10>
; UNROLL-NO-IC-NEXT: [[TMP13:%.*]] = sub <4 x i16> [[TMP11]], <i16 10, i16 10, i16 10, i16 10>
; UNROLL-NO-IC-NEXT: [[TMP14:%.*]] = getelementptr i16, ptr [[A:%.*]], i16 [[TMP0]]
; UNROLL-NO-IC-NEXT: [[TMP15:%.*]] = getelementptr i16, ptr [[A]], i16 [[TMP1]]
; UNROLL-NO-IC-NEXT: [[TMP16:%.*]] = getelementptr i16, ptr [[TMP14]], i32 0
; UNROLL-NO-IC-NEXT: store <4 x i16> [[TMP12]], ptr [[TMP16]], align 2
; UNROLL-NO-IC-NEXT: [[TMP17:%.*]] = getelementptr i16, ptr [[TMP14]], i32 4
; UNROLL-NO-IC-NEXT: store <4 x i16> [[TMP13]], ptr [[TMP17]], align 2
; UNROLL-NO-IC-NEXT: [[TMP12:%.*]] = zext <4 x i16> [[TMP10]] to <4 x i32>
; UNROLL-NO-IC-NEXT: [[TMP13:%.*]] = zext <4 x i16> [[TMP11]] to <4 x i32>
; UNROLL-NO-IC-NEXT: [[TMP14:%.*]] = add <4 x i32> [[TMP12]], [[TMP6]]
; UNROLL-NO-IC-NEXT: [[TMP15:%.*]] = add <4 x i32> [[TMP13]], [[TMP7]]
; UNROLL-NO-IC-NEXT: [[TMP16:%.*]] = getelementptr i32, ptr [[A:%.*]], i16 [[TMP0]]
; UNROLL-NO-IC-NEXT: [[TMP17:%.*]] = getelementptr i32, ptr [[A]], i16 [[TMP1]]
; UNROLL-NO-IC-NEXT: [[TMP18:%.*]] = getelementptr i32, ptr [[TMP16]], i32 0
; UNROLL-NO-IC-NEXT: store <4 x i32> [[TMP14]], ptr [[TMP18]], align 4
; UNROLL-NO-IC-NEXT: [[TMP19:%.*]] = getelementptr i32, ptr [[TMP16]], i32 4
; UNROLL-NO-IC-NEXT: store <4 x i32> [[TMP15]], ptr [[TMP19]], align 4
; UNROLL-NO-IC-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 8
; UNROLL-NO-IC-NEXT: [[VEC_IND_NEXT]] = add <4 x i16> [[STEP_ADD]], <i16 4, i16 4, i16 4, i16 4>
; UNROLL-NO-IC-NEXT: [[TMP18:%.*]] = icmp eq i32 [[INDEX_NEXT]], 40
; UNROLL-NO-IC-NEXT: br i1 [[TMP18]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; UNROLL-NO-IC-NEXT: [[TMP20:%.*]] = icmp eq i32 [[INDEX_NEXT]], 40
; UNROLL-NO-IC-NEXT: br i1 [[TMP20]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; UNROLL-NO-IC: middle.block:
; UNROLL-NO-IC-NEXT: [[CMP_N:%.*]] = icmp eq i32 43, 40
; UNROLL-NO-IC-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i16> [[TMP9]], i32 3
Expand All @@ -2649,8 +2651,10 @@ define void @sink_dead_inst(ptr %a) {
; UNROLL-NO-IC-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
; UNROLL-NO-IC-NEXT: [[REC_2_PREV]] = zext i16 [[IV_NEXT]] to i32
; UNROLL-NO-IC-NEXT: [[REC_1_PREV]] = add i16 [[IV_NEXT]], 5
; UNROLL-NO-IC-NEXT: [[GEP:%.*]] = getelementptr i16, ptr [[A]], i16 [[IV]]
; UNROLL-NO-IC-NEXT: store i16 [[USE_REC_1]], ptr [[GEP]], align 2
; UNROLL-NO-IC-NEXT: [[REC_1_EXT:%.*]] = zext i16 [[SCALAR_RECUR]] to i32
; UNROLL-NO-IC-NEXT: [[USE_ADD:%.*]] = add i32 [[REC_1_EXT]], [[SCALAR_RECUR5]]
; UNROLL-NO-IC-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[A]], i16 [[IV]]
; UNROLL-NO-IC-NEXT: store i32 [[USE_ADD]], ptr [[GEP]], align 4
; UNROLL-NO-IC-NEXT: br i1 [[CMP]], label [[FOR_END]], label [[FOR_COND]], !llvm.loop [[LOOP25:![0-9]+]]
; UNROLL-NO-IC: for.end:
; UNROLL-NO-IC-NEXT: ret void
Expand All @@ -2674,15 +2678,17 @@ define void @sink_dead_inst(ptr %a) {
; UNROLL-NO-VF-NEXT: [[TMP5]] = zext i16 [[TMP3]] to i32
; UNROLL-NO-VF-NEXT: [[TMP6:%.*]] = add i16 [[TMP2]], 5
; UNROLL-NO-VF-NEXT: [[TMP7]] = add i16 [[TMP3]], 5
; UNROLL-NO-VF-NEXT: [[TMP8:%.*]] = sub i16 [[VECTOR_RECUR]], 10
; UNROLL-NO-VF-NEXT: [[TMP9:%.*]] = sub i16 [[TMP6]], 10
; UNROLL-NO-VF-NEXT: [[TMP10:%.*]] = getelementptr i16, ptr [[A:%.*]], i16 [[TMP0]]
; UNROLL-NO-VF-NEXT: [[TMP11:%.*]] = getelementptr i16, ptr [[A]], i16 [[TMP1]]
; UNROLL-NO-VF-NEXT: store i16 [[TMP8]], ptr [[TMP10]], align 2
; UNROLL-NO-VF-NEXT: store i16 [[TMP9]], ptr [[TMP11]], align 2
; UNROLL-NO-VF-NEXT: [[TMP8:%.*]] = zext i16 [[VECTOR_RECUR]] to i32
; UNROLL-NO-VF-NEXT: [[TMP9:%.*]] = zext i16 [[TMP6]] to i32
; UNROLL-NO-VF-NEXT: [[TMP10:%.*]] = add i32 [[TMP8]], [[VECTOR_RECUR1]]
; UNROLL-NO-VF-NEXT: [[TMP11:%.*]] = add i32 [[TMP9]], [[TMP4]]
; UNROLL-NO-VF-NEXT: [[TMP12:%.*]] = getelementptr i32, ptr [[A:%.*]], i16 [[TMP0]]
; UNROLL-NO-VF-NEXT: [[TMP13:%.*]] = getelementptr i32, ptr [[A]], i16 [[TMP1]]
; UNROLL-NO-VF-NEXT: store i32 [[TMP10]], ptr [[TMP12]], align 4
; UNROLL-NO-VF-NEXT: store i32 [[TMP11]], ptr [[TMP13]], align 4
; UNROLL-NO-VF-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; UNROLL-NO-VF-NEXT: [[TMP12:%.*]] = icmp eq i32 [[INDEX_NEXT]], 42
; UNROLL-NO-VF-NEXT: br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; UNROLL-NO-VF-NEXT: [[TMP14:%.*]] = icmp eq i32 [[INDEX_NEXT]], 42
; UNROLL-NO-VF-NEXT: br i1 [[TMP14]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; UNROLL-NO-VF: middle.block:
; UNROLL-NO-VF-NEXT: [[CMP_N:%.*]] = icmp eq i32 43, 42
; UNROLL-NO-VF-NEXT: br i1 [[CMP_N]], label [[FOR_END:%.*]], label [[SCALAR_PH]]
Expand All @@ -2700,8 +2706,10 @@ define void @sink_dead_inst(ptr %a) {
; UNROLL-NO-VF-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
; UNROLL-NO-VF-NEXT: [[REC_2_PREV]] = zext i16 [[IV_NEXT]] to i32
; UNROLL-NO-VF-NEXT: [[REC_1_PREV]] = add i16 [[IV_NEXT]], 5
; UNROLL-NO-VF-NEXT: [[GEP:%.*]] = getelementptr i16, ptr [[A]], i16 [[IV]]
; UNROLL-NO-VF-NEXT: store i16 [[USE_REC_1]], ptr [[GEP]], align 2
; UNROLL-NO-VF-NEXT: [[REC_1_EXT:%.*]] = zext i16 [[SCALAR_RECUR]] to i32
; UNROLL-NO-VF-NEXT: [[USE_ADD:%.*]] = add i32 [[REC_1_EXT]], [[SCALAR_RECUR3]]
; UNROLL-NO-VF-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[A]], i16 [[IV]]
; UNROLL-NO-VF-NEXT: store i32 [[USE_ADD]], ptr [[GEP]], align 4
; UNROLL-NO-VF-NEXT: br i1 [[CMP]], label [[FOR_END]], label [[FOR_COND]], !llvm.loop [[LOOP25:![0-9]+]]
; UNROLL-NO-VF: for.end:
; UNROLL-NO-VF-NEXT: ret void
Expand All @@ -2724,14 +2732,15 @@ define void @sink_dead_inst(ptr %a) {
; SINK-AFTER-NEXT: [[TMP3:%.*]] = shufflevector <4 x i32> [[VECTOR_RECUR1]], <4 x i32> [[TMP2]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; SINK-AFTER-NEXT: [[TMP4]] = add <4 x i16> [[TMP1]], <i16 5, i16 5, i16 5, i16 5>
; SINK-AFTER-NEXT: [[TMP5:%.*]] = shufflevector <4 x i16> [[VECTOR_RECUR]], <4 x i16> [[TMP4]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; SINK-AFTER-NEXT: [[TMP6:%.*]] = sub <4 x i16> [[TMP5]], <i16 10, i16 10, i16 10, i16 10>
; SINK-AFTER-NEXT: [[TMP7:%.*]] = getelementptr i16, ptr [[A:%.*]], i16 [[TMP0]]
; SINK-AFTER-NEXT: [[TMP8:%.*]] = getelementptr i16, ptr [[TMP7]], i32 0
; SINK-AFTER-NEXT: store <4 x i16> [[TMP6]], ptr [[TMP8]], align 2
; SINK-AFTER-NEXT: [[TMP6:%.*]] = zext <4 x i16> [[TMP5]] to <4 x i32>
; SINK-AFTER-NEXT: [[TMP7:%.*]] = add <4 x i32> [[TMP6]], [[TMP3]]
; SINK-AFTER-NEXT: [[TMP8:%.*]] = getelementptr i32, ptr [[A:%.*]], i16 [[TMP0]]
; SINK-AFTER-NEXT: [[TMP9:%.*]] = getelementptr i32, ptr [[TMP8]], i32 0
; SINK-AFTER-NEXT: store <4 x i32> [[TMP7]], ptr [[TMP9]], align 4
; SINK-AFTER-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; SINK-AFTER-NEXT: [[VEC_IND_NEXT]] = add <4 x i16> [[VEC_IND]], <i16 4, i16 4, i16 4, i16 4>
; SINK-AFTER-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], 40
; SINK-AFTER-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; SINK-AFTER-NEXT: [[TMP10:%.*]] = icmp eq i32 [[INDEX_NEXT]], 40
; SINK-AFTER-NEXT: br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP24:![0-9]+]]
; SINK-AFTER: middle.block:
; SINK-AFTER-NEXT: [[CMP_N:%.*]] = icmp eq i32 43, 40
; SINK-AFTER-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i16> [[TMP4]], i32 3
Expand All @@ -2751,8 +2760,10 @@ define void @sink_dead_inst(ptr %a) {
; SINK-AFTER-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
; SINK-AFTER-NEXT: [[REC_2_PREV]] = zext i16 [[IV_NEXT]] to i32
; SINK-AFTER-NEXT: [[REC_1_PREV]] = add i16 [[IV_NEXT]], 5
; SINK-AFTER-NEXT: [[GEP:%.*]] = getelementptr i16, ptr [[A]], i16 [[IV]]
; SINK-AFTER-NEXT: store i16 [[USE_REC_1]], ptr [[GEP]], align 2
; SINK-AFTER-NEXT: [[REC_1_EXT:%.*]] = zext i16 [[SCALAR_RECUR]] to i32
; SINK-AFTER-NEXT: [[USE_ADD:%.*]] = add i32 [[REC_1_EXT]], [[SCALAR_RECUR4]]
; SINK-AFTER-NEXT: [[GEP:%.*]] = getelementptr i32, ptr [[A]], i16 [[IV]]
; SINK-AFTER-NEXT: store i32 [[USE_ADD]], ptr [[GEP]], align 4
; SINK-AFTER-NEXT: br i1 [[CMP]], label [[FOR_END]], label [[FOR_COND]], !llvm.loop [[LOOP25:![0-9]+]]
; SINK-AFTER: for.end:
; SINK-AFTER-NEXT: ret void
Expand All @@ -2769,8 +2780,10 @@ for.cond:
%iv.next = add i16 %iv, 1
%rec.2.prev = zext i16 %iv.next to i32
%rec.1.prev = add i16 %iv.next, 5
%gep = getelementptr i16, ptr %a, i16 %iv
store i16 %use.rec.1, ptr %gep
%rec.1.ext = zext i16 %rec.1 to i32
%use.add = add i32 %rec.1.ext, %rec.2
%gep = getelementptr i32 , ptr %a, i16 %iv
store i32 %use.add, ptr %gep
br i1 %cmp, label %for.end, label %for.cond

for.end:
Expand Down Expand Up @@ -3705,30 +3718,25 @@ define void @unused_recurrence(ptr %a) {
; UNROLL-NO-IC: vector.body:
; UNROLL-NO-IC-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; UNROLL-NO-IC-NEXT: [[VEC_IND:%.*]] = phi <4 x i16> [ <i16 -27, i16 -26, i16 -25, i16 -24>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; UNROLL-NO-IC-NEXT: [[VECTOR_RECUR:%.*]] = phi <4 x i16> [ <i16 poison, i16 poison, i16 poison, i16 0>, [[VECTOR_PH]] ], [ [[TMP3:%.*]], [[VECTOR_BODY]] ]
; UNROLL-NO-IC-NEXT: [[STEP_ADD:%.*]] = add <4 x i16> [[VEC_IND]], <i16 4, i16 4, i16 4, i16 4>
; UNROLL-NO-IC-NEXT: [[TMP0:%.*]] = add <4 x i16> [[VEC_IND]], <i16 1, i16 1, i16 1, i16 1>
; UNROLL-NO-IC-NEXT: [[TMP1:%.*]] = add <4 x i16> [[STEP_ADD]], <i16 1, i16 1, i16 1, i16 1>
; UNROLL-NO-IC-NEXT: [[TMP2:%.*]] = add <4 x i16> [[TMP0]], <i16 5, i16 5, i16 5, i16 5>
; UNROLL-NO-IC-NEXT: [[TMP3]] = add <4 x i16> [[TMP1]], <i16 5, i16 5, i16 5, i16 5>
; UNROLL-NO-IC-NEXT: [[TMP4:%.*]] = shufflevector <4 x i16> [[VECTOR_RECUR]], <4 x i16> [[TMP2]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; UNROLL-NO-IC-NEXT: [[TMP5:%.*]] = shufflevector <4 x i16> [[TMP2]], <4 x i16> [[TMP3]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; UNROLL-NO-IC-NEXT: [[TMP3:%.*]] = add <4 x i16> [[TMP1]], <i16 5, i16 5, i16 5, i16 5>
; UNROLL-NO-IC-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 8
; UNROLL-NO-IC-NEXT: [[VEC_IND_NEXT]] = add <4 x i16> [[STEP_ADD]], <i16 4, i16 4, i16 4, i16 4>
; UNROLL-NO-IC-NEXT: [[TMP6:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1024
; UNROLL-NO-IC-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP34:![0-9]+]]
; UNROLL-NO-IC-NEXT: [[TMP4:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1024
; UNROLL-NO-IC-NEXT: br i1 [[TMP4]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP34:![0-9]+]]
; UNROLL-NO-IC: middle.block:
; UNROLL-NO-IC-NEXT: [[CMP_N:%.*]] = icmp eq i32 1028, 1024
; UNROLL-NO-IC-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i16> [[TMP3]], i32 3
; UNROLL-NO-IC-NEXT: br i1 [[CMP_N]], label [[FOR_END:%.*]], label [[SCALAR_PH]]
; UNROLL-NO-IC: scalar.ph:
; UNROLL-NO-IC-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ]
; UNROLL-NO-IC-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ 997, [[MIDDLE_BLOCK]] ], [ -27, [[ENTRY]] ]
; UNROLL-NO-IC-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ 997, [[MIDDLE_BLOCK]] ], [ -27, [[ENTRY:%.*]] ]
; UNROLL-NO-IC-NEXT: br label [[FOR_COND:%.*]]
; UNROLL-NO-IC: for.cond:
; UNROLL-NO-IC-NEXT: [[IV:%.*]] = phi i16 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR_COND]] ]
; UNROLL-NO-IC-NEXT: [[SCALAR_RECUR:%.*]] = phi i16 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[REC_1_PREV:%.*]], [[FOR_COND]] ]
; UNROLL-NO-IC-NEXT: [[USE_REC_1:%.*]] = sub i16 [[SCALAR_RECUR]], 10
; UNROLL-NO-IC-NEXT: [[REC_1:%.*]] = phi i16 [ 0, [[SCALAR_PH]] ], [ [[REC_1_PREV:%.*]], [[FOR_COND]] ]
; UNROLL-NO-IC-NEXT: [[USE_REC_1:%.*]] = sub i16 [[REC_1]], 10
; UNROLL-NO-IC-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
; UNROLL-NO-IC-NEXT: [[REC_1_PREV]] = add i16 [[IV_NEXT]], 5
; UNROLL-NO-IC-NEXT: [[CMP:%.*]] = icmp eq i16 [[IV]], 1000
Expand All @@ -3743,29 +3751,27 @@ define void @unused_recurrence(ptr %a) {
; UNROLL-NO-VF-NEXT: br label [[VECTOR_BODY:%.*]]
; UNROLL-NO-VF: vector.body:
; UNROLL-NO-VF-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; UNROLL-NO-VF-NEXT: [[VECTOR_RECUR:%.*]] = phi i16 [ 0, [[VECTOR_PH]] ], [ [[TMP5:%.*]], [[VECTOR_BODY]] ]
; UNROLL-NO-VF-NEXT: [[DOTCAST:%.*]] = trunc i32 [[INDEX]] to i16
; UNROLL-NO-VF-NEXT: [[OFFSET_IDX:%.*]] = add i16 -27, [[DOTCAST]]
; UNROLL-NO-VF-NEXT: [[TMP0:%.*]] = add i16 [[OFFSET_IDX]], 0
; UNROLL-NO-VF-NEXT: [[TMP1:%.*]] = add i16 [[OFFSET_IDX]], 1
; UNROLL-NO-VF-NEXT: [[TMP2:%.*]] = add i16 [[TMP0]], 1
; UNROLL-NO-VF-NEXT: [[TMP3:%.*]] = add i16 [[TMP1]], 1
; UNROLL-NO-VF-NEXT: [[TMP4:%.*]] = add i16 [[TMP2]], 5
; UNROLL-NO-VF-NEXT: [[TMP5]] = add i16 [[TMP3]], 5
; UNROLL-NO-VF-NEXT: [[TMP5:%.*]] = add i16 [[TMP3]], 5
; UNROLL-NO-VF-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; UNROLL-NO-VF-NEXT: [[TMP6:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1028
; UNROLL-NO-VF-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP34:![0-9]+]]
; UNROLL-NO-VF: middle.block:
; UNROLL-NO-VF-NEXT: [[CMP_N:%.*]] = icmp eq i32 1028, 1028
; UNROLL-NO-VF-NEXT: br i1 [[CMP_N]], label [[FOR_END:%.*]], label [[SCALAR_PH]]
; UNROLL-NO-VF: scalar.ph:
; UNROLL-NO-VF-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[TMP5]], [[MIDDLE_BLOCK]] ]
; UNROLL-NO-VF-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ 1001, [[MIDDLE_BLOCK]] ], [ -27, [[ENTRY]] ]
; UNROLL-NO-VF-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ 1001, [[MIDDLE_BLOCK]] ], [ -27, [[ENTRY:%.*]] ]
; UNROLL-NO-VF-NEXT: br label [[FOR_COND:%.*]]
; UNROLL-NO-VF: for.cond:
; UNROLL-NO-VF-NEXT: [[IV:%.*]] = phi i16 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR_COND]] ]
; UNROLL-NO-VF-NEXT: [[SCALAR_RECUR:%.*]] = phi i16 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[REC_1_PREV:%.*]], [[FOR_COND]] ]
; UNROLL-NO-VF-NEXT: [[USE_REC_1:%.*]] = sub i16 [[SCALAR_RECUR]], 10
; UNROLL-NO-VF-NEXT: [[REC_1:%.*]] = phi i16 [ 0, [[SCALAR_PH]] ], [ [[REC_1_PREV:%.*]], [[FOR_COND]] ]
; UNROLL-NO-VF-NEXT: [[USE_REC_1:%.*]] = sub i16 [[REC_1]], 10
; UNROLL-NO-VF-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
; UNROLL-NO-VF-NEXT: [[REC_1_PREV]] = add i16 [[IV_NEXT]], 5
; UNROLL-NO-VF-NEXT: [[CMP:%.*]] = icmp eq i16 [[IV]], 1000
Expand All @@ -3781,26 +3787,22 @@ define void @unused_recurrence(ptr %a) {
; SINK-AFTER: vector.body:
; SINK-AFTER-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; SINK-AFTER-NEXT: [[VEC_IND:%.*]] = phi <4 x i16> [ <i16 -27, i16 -26, i16 -25, i16 -24>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; SINK-AFTER-NEXT: [[VECTOR_RECUR:%.*]] = phi <4 x i16> [ <i16 poison, i16 poison, i16 poison, i16 0>, [[VECTOR_PH]] ], [ [[TMP1:%.*]], [[VECTOR_BODY]] ]
; SINK-AFTER-NEXT: [[TMP0:%.*]] = add <4 x i16> [[VEC_IND]], <i16 1, i16 1, i16 1, i16 1>
; SINK-AFTER-NEXT: [[TMP1]] = add <4 x i16> [[TMP0]], <i16 5, i16 5, i16 5, i16 5>
; SINK-AFTER-NEXT: [[TMP2:%.*]] = shufflevector <4 x i16> [[VECTOR_RECUR]], <4 x i16> [[TMP1]], <4 x i32> <i32 3, i32 4, i32 5, i32 6>
; SINK-AFTER-NEXT: [[TMP1:%.*]] = add <4 x i16> [[TMP0]], <i16 5, i16 5, i16 5, i16 5>
; SINK-AFTER-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; SINK-AFTER-NEXT: [[VEC_IND_NEXT]] = add <4 x i16> [[VEC_IND]], <i16 4, i16 4, i16 4, i16 4>
; SINK-AFTER-NEXT: [[TMP3:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1028
; SINK-AFTER-NEXT: br i1 [[TMP3]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP34:![0-9]+]]
; SINK-AFTER-NEXT: [[TMP2:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1028
; SINK-AFTER-NEXT: br i1 [[TMP2]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP34:![0-9]+]]
; SINK-AFTER: middle.block:
; SINK-AFTER-NEXT: [[CMP_N:%.*]] = icmp eq i32 1028, 1028
; SINK-AFTER-NEXT: [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <4 x i16> [[TMP1]], i32 3
; SINK-AFTER-NEXT: br i1 [[CMP_N]], label [[FOR_END:%.*]], label [[SCALAR_PH]]
; SINK-AFTER: scalar.ph:
; SINK-AFTER-NEXT: [[SCALAR_RECUR_INIT:%.*]] = phi i16 [ 0, [[ENTRY:%.*]] ], [ [[VECTOR_RECUR_EXTRACT]], [[MIDDLE_BLOCK]] ]
; SINK-AFTER-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ 1001, [[MIDDLE_BLOCK]] ], [ -27, [[ENTRY]] ]
; SINK-AFTER-NEXT: [[BC_RESUME_VAL:%.*]] = phi i16 [ 1001, [[MIDDLE_BLOCK]] ], [ -27, [[ENTRY:%.*]] ]
; SINK-AFTER-NEXT: br label [[FOR_COND:%.*]]
; SINK-AFTER: for.cond:
; SINK-AFTER-NEXT: [[IV:%.*]] = phi i16 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR_COND]] ]
; SINK-AFTER-NEXT: [[SCALAR_RECUR:%.*]] = phi i16 [ [[SCALAR_RECUR_INIT]], [[SCALAR_PH]] ], [ [[REC_1_PREV:%.*]], [[FOR_COND]] ]
; SINK-AFTER-NEXT: [[USE_REC_1:%.*]] = sub i16 [[SCALAR_RECUR]], 10
; SINK-AFTER-NEXT: [[REC_1:%.*]] = phi i16 [ 0, [[SCALAR_PH]] ], [ [[REC_1_PREV:%.*]], [[FOR_COND]] ]
; SINK-AFTER-NEXT: [[USE_REC_1:%.*]] = sub i16 [[REC_1]], 10
; SINK-AFTER-NEXT: [[IV_NEXT]] = add i16 [[IV]], 1
; SINK-AFTER-NEXT: [[REC_1_PREV]] = add i16 [[IV_NEXT]], 5
; SINK-AFTER-NEXT: [[CMP:%.*]] = icmp eq i16 [[IV]], 1000
Expand Down

0 comments on commit 02369b7

Please sign in to comment.