llvm/test/Transforms/LoopVectorize/RISCV/evl-compatible-loops.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -passes=loop-vectorize -force-tail-folding-style=data-with-evl \
; RUN: -prefer-predicate-over-epilogue=predicate-dont-vectorize \
; RUN: -mtriple=riscv64 -mattr=+v -S < %s | FileCheck %s

; Make sure we do not vectorize a loop with a widened int induction.
define void @test_wide_integer_induction(ptr noalias %a, i64 %N) {
; CHECK-LABEL: define void @test_wide_integer_induction(
; CHECK-SAME: ptr noalias [[A:%.*]], i64 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    store i64 [[IV]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[FOR_BODY]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
  %arrayidx = getelementptr inbounds i64, ptr %a, i64 %iv
  store i64 %iv, ptr %arrayidx, align 8
  %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
}

; Make sure we do not vectorize a loop with a widened ptr induction.
define void @test_wide_ptr_induction(ptr noalias %a, ptr noalias %b, i64 %N) {
; CHECK-LABEL: define void @test_wide_ptr_induction(
; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[EVL_BASED_IV:%.*]] = phi i64 [ 0, [[VECTOR_PH:%.*]] ], [ [[INDEX_EVL_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[ADDR:%.*]] = phi ptr [ [[INCDEC_PTR:%.*]], [[VECTOR_BODY]] ], [ [[B]], [[VECTOR_PH]] ]
; CHECK-NEXT:    [[INCDEC_PTR]] = getelementptr inbounds i8, ptr [[ADDR]], i64 8
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[EVL_BASED_IV]]
; CHECK-NEXT:    store ptr [[ADDR]], ptr [[ARRAYIDX]], align 8
; CHECK-NEXT:    [[INDEX_EVL_NEXT]] = add nuw nsw i64 [[EVL_BASED_IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INDEX_EVL_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label [[FOR_COND_CLEANUP:%.*]], label [[VECTOR_BODY]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %for.body ]
  %addr = phi ptr [ %incdec.ptr, %for.body ], [ %b, %entry ]
  %incdec.ptr = getelementptr inbounds i8, ptr %addr, i64 8
  %arrayidx = getelementptr inbounds i64, ptr %a, i64 %iv
  store ptr %addr, ptr %arrayidx, align 8
  %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
}