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llvm-project/llvm/test/Transforms/LoopVectorize/AArch64/sve-vector-reverse.ll
Florian Hahn 82d633e9ff
[VPlan] Materialize vector trip count using VPInstructions. (#151925) 
Materialize the vector trip count computation using VPInstruction
instead of directly creating IR. This is one of the last few steps
needed to model the full vector skeleton in VPlan. It also simplifies
vector-trip count computations for scalable vectors, as we can re-use
the UF x VF computation.

PR: https://github.com/llvm/llvm-project/pull/151925
2025-08-08 11:44:32 +01:00

165 lines
8.9 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --filter-out-after "^scalar.ph:"
; This is the loop in c++ being vectorize in this file with
;vector.reverse
; #pragma clang loop vectorize_width(8, scalable) interleave_count(2)
; for (int i = N-1; i >= 0; --i)
; a[i] = b[i] + 1.0;
; RUN: opt -passes=loop-vectorize,dce,instcombine -mtriple aarch64-linux-gnu -S \
; RUN: -prefer-predicate-over-epilogue=scalar-epilogue < %s | FileCheck %s
define void @vector_reverse_f64(i64 %N, ptr noalias %a, ptr noalias %b) #0{
; CHECK-LABEL: @vector_reverse_f64(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i64 [[N:%.*]], 0
; CHECK-NEXT: br i1 [[CMP7]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP1:%.*]] = shl nuw i64 [[TMP0]], 4
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], [[TMP1]]
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[TMP4:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP5:%.*]] = shl nuw i64 [[TMP4]], 3
; CHECK-NEXT: [[TMP6:%.*]] = shl i64 [[TMP4]], 4
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP6]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub nsw i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP7:%.*]] = xor i64 [[INDEX]], -1
; CHECK-NEXT: [[TMP8:%.*]] = add i64 [[N]], [[TMP7]]
; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds double, ptr [[B:%.*]], i64 [[TMP8]]
; CHECK-NEXT: [[TMP10:%.*]] = sub i64 1, [[TMP5]]
; CHECK-NEXT: [[TMP11:%.*]] = getelementptr inbounds double, ptr [[TMP9]], i64 [[TMP10]]
; CHECK-NEXT: [[TMP12:%.*]] = sub i64 0, [[TMP5]]
; CHECK-NEXT: [[TMP13:%.*]] = sub i64 1, [[TMP5]]
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds double, ptr [[TMP9]], i64 [[TMP12]]
; CHECK-NEXT: [[TMP15:%.*]] = getelementptr inbounds double, ptr [[TMP14]], i64 [[TMP13]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <vscale x 8 x double>, ptr [[TMP11]], align 8
; CHECK-NEXT: [[WIDE_LOAD1:%.*]] = load <vscale x 8 x double>, ptr [[TMP15]], align 8
; CHECK-NEXT: [[TMP16:%.*]] = fadd <vscale x 8 x double> [[WIDE_LOAD]], splat (double 1.000000e+00)
; CHECK-NEXT: [[TMP17:%.*]] = fadd <vscale x 8 x double> [[WIDE_LOAD1]], splat (double 1.000000e+00)
; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds double, ptr [[A:%.*]], i64 [[TMP8]]
; CHECK-NEXT: [[TMP19:%.*]] = sub i64 1, [[TMP5]]
; CHECK-NEXT: [[TMP20:%.*]] = getelementptr inbounds double, ptr [[TMP18]], i64 [[TMP19]]
; CHECK-NEXT: [[TMP21:%.*]] = sub i64 0, [[TMP5]]
; CHECK-NEXT: [[TMP22:%.*]] = sub i64 1, [[TMP5]]
; CHECK-NEXT: [[TMP23:%.*]] = getelementptr inbounds double, ptr [[TMP18]], i64 [[TMP21]]
; CHECK-NEXT: [[TMP24:%.*]] = getelementptr inbounds double, ptr [[TMP23]], i64 [[TMP22]]
; CHECK-NEXT: store <vscale x 8 x double> [[TMP16]], ptr [[TMP20]], align 8
; CHECK-NEXT: store <vscale x 8 x double> [[TMP17]], ptr [[TMP24]], align 8
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP6]]
; CHECK-NEXT: [[TMP25:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP25]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_MOD_VF]], 0
; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
;
entry:
%cmp7 = icmp sgt i64 %N, 0
br i1 %cmp7, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.body
ret void
for.body: ; preds = %entry, %for.body
%i.08.in = phi i64 [ %i.08, %for.body ], [ %N, %entry ]
%i.08 = add nsw i64 %i.08.in, -1
%arrayidx = getelementptr inbounds double, ptr %b, i64 %i.08
%0 = load double, ptr %arrayidx, align 8
%add = fadd double %0, 1.000000e+00
%arrayidx1 = getelementptr inbounds double, ptr %a, i64 %i.08
store double %add, ptr %arrayidx1, align 8
%cmp = icmp sgt i64 %i.08.in, 1
br i1 %cmp, label %for.body, label %for.cond.cleanup, !llvm.loop !0
}
define void @vector_reverse_i64(i64 %N, ptr %a, ptr %b) #0 {
; CHECK-LABEL: @vector_reverse_i64(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A2:%.*]] = ptrtoint ptr [[A:%.*]] to i64
; CHECK-NEXT: [[B1:%.*]] = ptrtoint ptr [[B:%.*]] to i64
; CHECK-NEXT: [[CMP8:%.*]] = icmp sgt i64 [[N:%.*]], 0
; CHECK-NEXT: br i1 [[CMP8]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK: for.body.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP1:%.*]] = shl nuw i64 [[TMP0]], 4
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], [[TMP1]]
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK: vector.memcheck:
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP3:%.*]] = shl i64 [[TMP2]], 7
; CHECK-NEXT: [[TMP4:%.*]] = sub i64 [[B1]], [[A2]]
; CHECK-NEXT: [[DIFF_CHECK:%.*]] = icmp ult i64 [[TMP4]], [[TMP3]]
; CHECK-NEXT: br i1 [[DIFF_CHECK]], label [[SCALAR_PH]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[TMP7:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP8:%.*]] = shl nuw i64 [[TMP7]], 3
; CHECK-NEXT: [[TMP9:%.*]] = shl i64 [[TMP7]], 4
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP9]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub nsw i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP10:%.*]] = xor i64 [[INDEX]], -1
; CHECK-NEXT: [[TMP11:%.*]] = add i64 [[N]], [[TMP10]]
; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds i64, ptr [[B]], i64 [[TMP11]]
; CHECK-NEXT: [[TMP13:%.*]] = sub i64 1, [[TMP8]]
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds i64, ptr [[TMP12]], i64 [[TMP13]]
; CHECK-NEXT: [[TMP15:%.*]] = sub i64 0, [[TMP8]]
; CHECK-NEXT: [[TMP16:%.*]] = sub i64 1, [[TMP8]]
; CHECK-NEXT: [[TMP17:%.*]] = getelementptr inbounds i64, ptr [[TMP12]], i64 [[TMP15]]
; CHECK-NEXT: [[TMP18:%.*]] = getelementptr inbounds i64, ptr [[TMP17]], i64 [[TMP16]]
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <vscale x 8 x i64>, ptr [[TMP14]], align 8
; CHECK-NEXT: [[WIDE_LOAD3:%.*]] = load <vscale x 8 x i64>, ptr [[TMP18]], align 8
; CHECK-NEXT: [[TMP19:%.*]] = add <vscale x 8 x i64> [[WIDE_LOAD]], splat (i64 1)
; CHECK-NEXT: [[TMP20:%.*]] = add <vscale x 8 x i64> [[WIDE_LOAD3]], splat (i64 1)
; CHECK-NEXT: [[TMP21:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[TMP11]]
; CHECK-NEXT: [[TMP22:%.*]] = sub i64 1, [[TMP8]]
; CHECK-NEXT: [[TMP23:%.*]] = getelementptr inbounds i64, ptr [[TMP21]], i64 [[TMP22]]
; CHECK-NEXT: [[TMP24:%.*]] = sub i64 0, [[TMP8]]
; CHECK-NEXT: [[TMP25:%.*]] = sub i64 1, [[TMP8]]
; CHECK-NEXT: [[TMP26:%.*]] = getelementptr inbounds i64, ptr [[TMP21]], i64 [[TMP24]]
; CHECK-NEXT: [[TMP27:%.*]] = getelementptr inbounds i64, ptr [[TMP26]], i64 [[TMP25]]
; CHECK-NEXT: store <vscale x 8 x i64> [[TMP19]], ptr [[TMP23]], align 8
; CHECK-NEXT: store <vscale x 8 x i64> [[TMP20]], ptr [[TMP27]], align 8
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP9]]
; CHECK-NEXT: [[TMP28:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP28]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_MOD_VF]], 0
; CHECK-NEXT: br i1 [[CMP_N]], label [[FOR_COND_CLEANUP_LOOPEXIT:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
;
entry:
%cmp8 = icmp sgt i64 %N, 0
br i1 %cmp8, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.body
ret void
for.body: ; preds = %entry, %for.body
%i.09.in = phi i64 [ %i.09, %for.body ], [ %N, %entry ]
%i.09 = add nsw i64 %i.09.in, -1
%arrayidx = getelementptr inbounds i64, ptr %b, i64 %i.09
%0 = load i64, ptr %arrayidx, align 8
%add = add i64 %0, 1
%arrayidx2 = getelementptr inbounds i64, ptr %a, i64 %i.09
store i64 %add, ptr %arrayidx2, align 8
%cmp = icmp sgt i64 %i.09.in, 1
br i1 %cmp, label %for.body, label %for.cond.cleanup, !llvm.loop !0
}
attributes #0 = { "target-cpu"="generic" "target-features"="+neon,+sve" }
!0 = distinct !{!0, !1, !2, !3, !4, !5}
!1 = !{!"llvm.loop.mustprogress"}
!2 = !{!"llvm.loop.vectorize.width", i32 8}
!3 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}
!4 = !{!"llvm.loop.vectorize.enable", i1 true}
!5 = !{!"llvm.loop.interleave.count", i32 2}
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