llvm/test/Transforms/VectorCombine/RISCV/vecreduce-of-cast.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=vector-combine -S -mtriple=riscv32 -mattr=+v | FileCheck  %s
; RUN: opt < %s -passes=vector-combine -S -mtriple=riscv64 -mattr=+v | FileCheck  %s

;
; Fold reduce(cast(X)) -> trunc(cast(X)) if more cost efficient
;

define i32 @reduce_add_trunc_v8i64_to_v8i32(<8 x i64> %a0)  {
; CHECK-LABEL: @reduce_add_trunc_v8i64_to_v8i32(
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = trunc i64 [[TMP1]] to i32
; CHECK-NEXT:    ret i32 [[RED]]
;
  %tr = trunc <8 x i64> %a0 to <8 x i32>
  %red = tail call i32 @llvm.vector.reduce.add.v8i32(<8 x i32> %tr)
  ret i32 %red
}

define i16 @reduce_add_trunc_v8i64_to_v8i16(<8 x i64> %a0)  {
; CHECK-LABEL: @reduce_add_trunc_v8i64_to_v8i16(
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = trunc i64 [[TMP1]] to i16
; CHECK-NEXT:    ret i16 [[RED]]
;
  %tr = trunc <8 x i64> %a0 to <8 x i16>
  %red = tail call i16 @llvm.vector.reduce.add.v8i16(<8 x i16> %tr)
  ret i16 %red
}

define i8 @reduce_add_trunc_v8i64_to_v8i8(<8 x i64> %a0)  {
; CHECK-LABEL: @reduce_add_trunc_v8i64_to_v8i8(
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vector.reduce.add.v8i64(<8 x i64> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = trunc i64 [[TMP1]] to i8
; CHECK-NEXT:    ret i8 [[RED]]
;
  %tr = trunc <8 x i64> %a0 to <8 x i8>
  %red = tail call i8 @llvm.vector.reduce.add.v8i8(<8 x i8> %tr)
  ret i8 %red
}

define i8 @reduce_or_trunc_v8i32_i8(<8 x i32> %a0)  {
; CHECK-LABEL: @reduce_or_trunc_v8i32_i8(
; CHECK-NEXT:    [[TMP1:%.*]] = call i32 @llvm.vector.reduce.or.v8i32(<8 x i32> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = trunc i32 [[TMP1]] to i8
; CHECK-NEXT:    ret i8 [[RED]]
;
  %tr = trunc <8 x i32> %a0 to <8 x i8>
  %red = tail call i8 @llvm.vector.reduce.or.v8i32(<8 x i8> %tr)
  ret i8 %red
}

define i8 @reduce_xor_trunc_v16i64_i8(<16 x i64> %a0)  {
; CHECK-LABEL: @reduce_xor_trunc_v16i64_i8(
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vector.reduce.xor.v16i64(<16 x i64> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = trunc i64 [[TMP1]] to i8
; CHECK-NEXT:    ret i8 [[RED]]
;
  %tr = trunc <16 x i64> %a0 to <16 x i8>
  %red = tail call i8 @llvm.vector.reduce.xor.v16i8(<16 x i8> %tr)
  ret i8 %red
}

define i16 @reduce_mul_trunc_v8i64_i16(<8 x i64> %a0)  {
; CHECK-LABEL: @reduce_mul_trunc_v8i64_i16(
; CHECK-NEXT:    [[TR:%.*]] = trunc <8 x i64> [[A0:%.*]] to <8 x i16>
; CHECK-NEXT:    [[RED:%.*]] = tail call i16 @llvm.vector.reduce.mul.v8i16(<8 x i16> [[TR]])
; CHECK-NEXT:    ret i16 [[RED]]
;
  %tr = trunc <8 x i64> %a0 to <8 x i16>
  %red = tail call i16 @llvm.vector.reduce.mul.v8i16(<8 x i16> %tr)
  ret i16 %red
}

define i32 @reduce_or_sext_v8i8_to_v8i32(<8 x i8> %a0)  {
; CHECK-LABEL: @reduce_or_sext_v8i8_to_v8i32(
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.vector.reduce.or.v8i8(<8 x i8> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = sext i8 [[TMP1]] to i32
; CHECK-NEXT:    ret i32 [[RED]]
;
  %tr = sext <8 x i8> %a0 to <8 x i32>
  %red = tail call i32 @llvm.vector.reduce.or.v8i32(<8 x i32> %tr)
  ret i32 %red
}

define i32 @reduce_or_sext_v8i16_to_v8i32(<8 x i16> %a0)  {
; CHECK-LABEL: @reduce_or_sext_v8i16_to_v8i32(
; CHECK-NEXT:    [[TMP1:%.*]] = call i16 @llvm.vector.reduce.or.v8i16(<8 x i16> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = sext i16 [[TMP1]] to i32
; CHECK-NEXT:    ret i32 [[RED]]
;
  %tr = sext <8 x i16> %a0 to <8 x i32>
  %red = tail call i32 @llvm.vector.reduce.or.v8i32(<8 x i32> %tr)
  ret i32 %red
}

define i32 @reduce_or_zext_v8i8_to_v8i32(<8 x i8> %a0)  {
; CHECK-LABEL: @reduce_or_zext_v8i8_to_v8i32(
; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.vector.reduce.or.v8i8(<8 x i8> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = zext i8 [[TMP1]] to i32
; CHECK-NEXT:    ret i32 [[RED]]
;
  %tr = zext <8 x i8> %a0 to <8 x i32>
  %red = tail call i32 @llvm.vector.reduce.or.v8i32(<8 x i32> %tr)
  ret i32 %red
}

define i32 @reduce_or_zext_v8i16_to_v8i32(<8 x i16> %a0)  {
; CHECK-LABEL: @reduce_or_zext_v8i16_to_v8i32(
; CHECK-NEXT:    [[TMP1:%.*]] = call i16 @llvm.vector.reduce.or.v8i16(<8 x i16> [[A0:%.*]])
; CHECK-NEXT:    [[RED:%.*]] = zext i16 [[TMP1]] to i32
; CHECK-NEXT:    ret i32 [[RED]]
;
  %tr = zext <8 x i16> %a0 to <8 x i32>
  %red = tail call i32 @llvm.vector.reduce.or.v8i32(<8 x i32> %tr)
  ret i32 %red
}

; Negative case - narrowing the reduce (to i8) is illegal.
; TODO: We could narrow to i16 instead.
define i32 @reduce_add_trunc_v8i8_to_v8i32(<8 x i8> %a0)  {
; CHECK-LABEL: @reduce_add_trunc_v8i8_to_v8i32(
; CHECK-NEXT:    [[TR:%.*]] = zext <8 x i8> [[A0:%.*]] to <8 x i32>
; CHECK-NEXT:    [[RED:%.*]] = tail call i32 @llvm.vector.reduce.add.v8i32(<8 x i32> [[TR]])
; CHECK-NEXT:    ret i32 [[RED]]
;
  %tr = zext <8 x i8> %a0 to <8 x i32>
  %red = tail call i32 @llvm.vector.reduce.add.v8i32(<8 x i32> %tr)
  ret i32 %red
}


declare i32 @llvm.vector.reduce.add.v8i32(<8 x i32>)
declare i16 @llvm.vector.reduce.add.v8i16(<8 x i16>)
declare i8 @llvm.vector.reduce.add.v8i8(<8 x i8>)
declare i8 @llvm.vector.reduce.or.v8i8(<8 x i8>)
declare i8 @llvm.vector.reduce.xor.v16i8(<16 x i8>)
declare i16 @llvm.vector.reduce.and.v16i16(<16 x i16>)
declare i16 @llvm.vector.reduce.mul.v8i16(<8 x i16>)