test/Transforms/LoopVectorize/RISCV/remark-reductions.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -mtriple=riscv64 -mattr=+v -p loop-vectorize -pass-remarks-analysis=loop-vectorize -S 2>&1 | FileCheck %s

; CHECK: remark: <unknown>:0:0: the cost-model indicates that interleaving is not beneficial
define float @s311(float %a_0, float %s311_sum) {
; CHECK-LABEL: define float @s311(
; CHECK-SAME: float [[A_0:%.*]], float [[S311_SUM:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <vscale x 4 x float> poison, float [[A_0]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <vscale x 4 x float> [[BROADCAST_SPLATINSERT]], <vscale x 4 x float> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[VEC_PHI:%.*]] = phi float [ [[S311_SUM]], %[[VECTOR_PH]] ], [ [[TMP6:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[AVL:%.*]] = phi i32 [ 1200, %[[VECTOR_PH]] ], [ [[AVL_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.experimental.get.vector.length.i32(i32 [[AVL]], i32 4, i1 true)
; CHECK-NEXT:    [[TMP6]] = call float @llvm.vp.reduce.fadd.nxv4f32(float [[VEC_PHI]], <vscale x 4 x float> [[BROADCAST_SPLAT]], <vscale x 4 x i1> splat (i1 true), i32 [[TMP9]])
; CHECK-NEXT:    [[AVL_NEXT]] = sub nuw i32 [[AVL]], [[TMP9]]
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i32 [[AVL_NEXT]], 0
; CHECK-NEXT:    br i1 [[TMP7]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[SCALAR_PH:.*]]:
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED:%.*]] = phi float [ [[S311_SUM]], %[[SCALAR_PH]] ], [ [[RED_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[RED_NEXT]] = fadd float [[A_0]], [[RED]]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[IV_NEXT]], 1200
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[EXIT]], label %[[LOOP]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RED_LCSSA:%.*]] = phi float [ [[RED_NEXT]], %[[LOOP]] ], [ [[TMP6]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret float [[RED_LCSSA]]
;
entry:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %red = phi float [ %s311_sum, %entry ], [ %red.next, %loop ]
  %red.next = fadd float %a_0, %red
  %iv.next = add nuw nsw i32 %iv, 1
  %exitcond = icmp eq i32 %iv.next, 1200
  br i1 %exitcond, label %exit, label %loop

exit:
  %red.lcssa = phi float [ %red.next, %loop ]
  ret float %red.lcssa
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
;.