llvm/test/Transforms/LoopVectorize/vectorize-force-tail-with-evl.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-vectorize \
; RUN: -force-tail-folding-style=data-with-evl \
; RUN: -prefer-predicate-over-epilogue=predicate-dont-vectorize \
; RUN: -force-target-supports-scalable-vectors -scalable-vectorization=on -S < %s | FileCheck --check-prefix=IF-EVL %s

; RUN: opt -passes=loop-vectorize \
; RUN: -force-tail-folding-style=none \
; RUN: -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue -force-vector-width=4 \
; RUN: -force-target-supports-scalable-vectors -scalable-vectorization=on -S < %s | FileCheck --check-prefix=NO-VP %s

; RUN: opt -passes=loop-vectorize \
; RUN: -force-tail-folding-style=none \
; RUN: -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue \
; RUN: -force-target-supports-scalable-vectors -scalable-vectorization=on -S < %s | FileCheck --check-prefix=NO-VP-DEF %s

; The target does not support predicated vectorization.
define void @foo(ptr noalias %a, ptr noalias %b, ptr noalias %c, i64 %N) {
; IF-EVL-LABEL: @foo(
; IF-EVL-NEXT:  entry:
; IF-EVL-NEXT:    br label [[FOR_BODY:%.*]]
; IF-EVL:       for.body:
; IF-EVL-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
; IF-EVL-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[IV]]
; IF-EVL-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; IF-EVL-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[C:%.*]], i64 [[IV]]
; IF-EVL-NEXT:    [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; IF-EVL-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP0]]
; IF-EVL-NEXT:    [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[IV]]
; IF-EVL-NEXT:    store i32 [[ADD]], ptr [[ARRAYIDX4]], align 4
; IF-EVL-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; IF-EVL-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N:%.*]]
; IF-EVL-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY]]
; IF-EVL:       for.cond.cleanup:
; IF-EVL-NEXT:    ret void
;
; NO-VP-LABEL: @foo(
; NO-VP-NEXT:  entry:
; NO-VP-NEXT:    [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-NEXT:    [[TMP8:%.*]] = mul nuw i64 [[TMP0]], 4
; NO-VP-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], [[TMP8]]
; NO-VP-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; NO-VP:       vector.ph:
; NO-VP-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-NEXT:    [[TMP14:%.*]] = mul nuw i64 [[TMP1]], 4
; NO-VP-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP14]]
; NO-VP-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; NO-VP-NEXT:    [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-NEXT:    [[TMP15:%.*]] = mul nuw i64 [[TMP2]], 4
; NO-VP-NEXT:    br label [[VECTOR_BODY:%.*]]
; NO-VP:       vector.body:
; NO-VP-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; NO-VP-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[INDEX]]
; NO-VP-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i32, ptr [[TMP4]], i32 0
; NO-VP-NEXT:    [[WIDE_LOAD:%.*]] = load <vscale x 4 x i32>, ptr [[TMP5]], align 4
; NO-VP-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[C:%.*]], i64 [[INDEX]]
; NO-VP-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i32, ptr [[TMP6]], i32 0
; NO-VP-NEXT:    [[WIDE_LOAD1:%.*]] = load <vscale x 4 x i32>, ptr [[TMP7]], align 4
; NO-VP-NEXT:    [[TMP16:%.*]] = add nsw <vscale x 4 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; NO-VP-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDEX]]
; NO-VP-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[TMP9]], i32 0
; NO-VP-NEXT:    store <vscale x 4 x i32> [[TMP16]], ptr [[TMP10]], align 4
; NO-VP-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP15]]
; NO-VP-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; NO-VP-NEXT:    br i1 [[TMP11]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; NO-VP:       middle.block:
; NO-VP-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; NO-VP-NEXT:    br i1 [[CMP_N]], label [[FOR_COND_CLEANUP:%.*]], label [[SCALAR_PH]]
; NO-VP:       scalar.ph:
; NO-VP-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; NO-VP-NEXT:    br label [[FOR_BODY:%.*]]
; NO-VP:       for.body:
; NO-VP-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
; NO-VP-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[IV]]
; NO-VP-NEXT:    [[TMP12:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; NO-VP-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[IV]]
; NO-VP-NEXT:    [[TMP13:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; NO-VP-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP13]], [[TMP12]]
; NO-VP-NEXT:    [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IV]]
; NO-VP-NEXT:    store i32 [[ADD]], ptr [[ARRAYIDX4]], align 4
; NO-VP-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; NO-VP-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; NO-VP-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; NO-VP:       for.cond.cleanup:
; NO-VP-NEXT:    ret void
;
; NO-VP-DEF-LABEL: @foo(
; NO-VP-DEF-NEXT:  entry:
; NO-VP-DEF-NEXT:    [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-DEF-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], [[TMP0]]
; NO-VP-DEF-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; NO-VP-DEF:       vector.ph:
; NO-VP-DEF-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-DEF-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP1]]
; NO-VP-DEF-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; NO-VP-DEF-NEXT:    [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; NO-VP-DEF-NEXT:    br label [[VECTOR_BODY:%.*]]
; NO-VP-DEF:       vector.body:
; NO-VP-DEF-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; NO-VP-DEF-NEXT:    [[TMP4:%.*]] = getelementptr inbounds i32, ptr [[B:%.*]], i64 [[INDEX]]
; NO-VP-DEF-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i32, ptr [[TMP4]], i32 0
; NO-VP-DEF-NEXT:    [[WIDE_LOAD:%.*]] = load <vscale x 1 x i32>, ptr [[TMP5]], align 4
; NO-VP-DEF-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[C:%.*]], i64 [[INDEX]]
; NO-VP-DEF-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i32, ptr [[TMP6]], i32 0
; NO-VP-DEF-NEXT:    [[WIDE_LOAD1:%.*]] = load <vscale x 1 x i32>, ptr [[TMP7]], align 4
; NO-VP-DEF-NEXT:    [[TMP8:%.*]] = add nsw <vscale x 1 x i32> [[WIDE_LOAD1]], [[WIDE_LOAD]]
; NO-VP-DEF-NEXT:    [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDEX]]
; NO-VP-DEF-NEXT:    [[TMP10:%.*]] = getelementptr inbounds i32, ptr [[TMP9]], i32 0
; NO-VP-DEF-NEXT:    store <vscale x 1 x i32> [[TMP8]], ptr [[TMP10]], align 4
; NO-VP-DEF-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP2]]
; NO-VP-DEF-NEXT:    [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; NO-VP-DEF-NEXT:    br i1 [[TMP11]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; NO-VP-DEF:       middle.block:
; NO-VP-DEF-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; NO-VP-DEF-NEXT:    br i1 [[CMP_N]], label [[FOR_COND_CLEANUP:%.*]], label [[SCALAR_PH]]
; NO-VP-DEF:       scalar.ph:
; NO-VP-DEF-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; NO-VP-DEF-NEXT:    br label [[FOR_BODY:%.*]]
; NO-VP-DEF:       for.body:
; NO-VP-DEF-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
; NO-VP-DEF-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[IV]]
; NO-VP-DEF-NEXT:    [[TMP12:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; NO-VP-DEF-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[IV]]
; NO-VP-DEF-NEXT:    [[TMP13:%.*]] = load i32, ptr [[ARRAYIDX2]], align 4
; NO-VP-DEF-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP13]], [[TMP12]]
; NO-VP-DEF-NEXT:    [[ARRAYIDX4:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IV]]
; NO-VP-DEF-NEXT:    store i32 [[ADD]], ptr [[ARRAYIDX4]], align 4
; NO-VP-DEF-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; NO-VP-DEF-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; NO-VP-DEF-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; NO-VP-DEF:       for.cond.cleanup:
; NO-VP-DEF-NEXT:    ret void
;
entry:
  br label %for.body

for.body:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %b, i64 %iv
  %0 = load i32, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds i32, ptr %c, i64 %iv
  %1 = load i32, ptr %arrayidx2, align 4
  %add = add nsw i32 %1, %0
  %arrayidx4 = getelementptr inbounds i32, ptr %a, i64 %iv
  store i32 %add, ptr %arrayidx4, align 4
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, %N
  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret void
}