; REQUIRES: asserts
; RUN: opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfh -prefer-predicate-over-epilogue=scalar-epilogue -debug-only=loop-vectorize,vplan --disable-output -riscv-v-register-bit-width-lmul=1 -S < %s 2>&1 | FileCheck %s --check-prefix=ZVFH
; RUN: opt -passes=loop-vectorize -mtriple riscv64 -mattr=+v,+zvfhmin -prefer-predicate-over-epilogue=scalar-epilogue -debug-only=loop-vectorize,vplan --disable-output -riscv-v-register-bit-width-lmul=1 -S < %s 2>&1 | FileCheck %s --check-prefix=ZVFHMIN

; TODO: -prefer-predicate-over-epilogue=scalar-epilogue was added to allow
; unrolling. Calculate register pressure for all VPlans, not just unrolled ones,
; and remove.

define void @add(ptr noalias nocapture readonly %src1, ptr noalias nocapture readonly %src2, i32 signext %size, ptr noalias nocapture writeonly %result) {
; CHECK-LABEL: add
; ZVFH:  LV(REG): Found max usage: 2 item
; ZVFH-NEXT:  LV(REG): RegisterClass: RISCV::GPRRC, 3 registers
; ZVFH-NEXT:  LV(REG): RegisterClass: RISCV::VRRC, 2 registers
; ZVFH-NEXT:  LV(REG): Found invariant usage: 1 item
; ZVFH-NEXT:  LV(REG): RegisterClass: RISCV::GPRRC, 1 registers
; ZVFHMIN:  LV(REG): Found max usage: 2 item
; ZVFHMIN-NEXT:  LV(REG): RegisterClass: RISCV::GPRRC, 3 registers
; ZVFHMIN-NEXT:  LV(REG): RegisterClass: RISCV::VRRC, 4 registers
; ZVFHMIN-NEXT:  LV(REG): Found invariant usage: 1 item
; ZVFHMIN-NEXT:  LV(REG): RegisterClass: RISCV::GPRRC, 1 registers

entry:
  %conv = zext i32 %size to i64
  %cmp10.not = icmp eq i32 %size, 0
  br i1 %cmp10.not, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret void

for.body:
  %i.011 = phi i64 [ %add4, %for.body ], [ 0, %entry ]
  %arrayidx = getelementptr inbounds half, ptr %src1, i64 %i.011
  %0 = load half, ptr %arrayidx, align 4
  %arrayidx2 = getelementptr inbounds half, ptr %src2, i64 %i.011
  %1 = load half, ptr %arrayidx2, align 4
  %add = fadd half %0, %1
  %arrayidx3 = getelementptr inbounds half, ptr %result, i64 %i.011
  store half %add, ptr %arrayidx3, align 4
  %add4 = add nuw nsw i64 %i.011, 1
  %exitcond.not = icmp eq i64 %add4, %conv
  br i1 %exitcond.not, label %for.cond.cleanup, label %for.body
}