test/Transforms/LoopVectorize/RISCV/pr154103.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
; RUN: opt -p loop-vectorize -mtriple riscv64 -mattr=+v < %s -S | FileCheck %s

; Make sure we don't duplicate the safe divisor cost in the VPlan cost model.

define void @pr154103(ptr noalias %a, ptr noalias %b, ptr noalias %c, ptr noalias %d) {
; CHECK-LABEL: define void @pr154103(
; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]], ptr noalias [[D:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 1, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LATCH:.*]] ]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    [[X:%.*]] = load i8, ptr [[GEP]], align 1
; CHECK-NEXT:    [[CONV:%.*]] = zext i8 [[X]] to i64
; CHECK-NEXT:    [[DIV:%.*]] = sdiv i64 0, [[CONV]]
; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i64 [[DIV]], 0
; CHECK-NEXT:    br i1 [[CMP]], label %[[THEN:.*]], label %[[LATCH]]
; CHECK:       [[THEN]]:
; CHECK-NEXT:    [[Y:%.*]] = load i8, ptr [[B]], align 1
; CHECK-NEXT:    [[ZEXT:%.*]] = zext i8 [[Y]] to i64
; CHECK-NEXT:    [[NOT:%.*]] = xor i64 [[ZEXT]], 0
; CHECK-NEXT:    br label %[[LATCH]]
; CHECK:       [[LATCH]]:
; CHECK-NEXT:    [[COND:%.*]] = phi i64 [ [[NOT]], %[[THEN]] ], [ 0, %[[LOOP]] ]
; CHECK-NEXT:    [[TRUNC:%.*]] = trunc i64 [[COND]] to i16
; CHECK-NEXT:    store i16 [[TRUNC]], ptr [[C]], align 2
; CHECK-NEXT:    store i32 0, ptr [[D]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 7
; CHECK-NEXT:    [[DONE:%.*]] = icmp eq i64 [[IV]], 0
; CHECK-NEXT:    br i1 [[DONE]], label %[[EXIT:.*]], label %[[LOOP]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 1, %entry ], [ %iv.next, %latch ]
  %gep = getelementptr i8, ptr %a, i64 %iv
  %x = load i8, ptr %gep, align 1
  %conv = zext i8 %x to i64
  %div = sdiv i64 0, %conv
  %cmp = icmp sgt i64 %div, 0
  br i1 %cmp, label %then, label %latch

then:
  %y = load i8, ptr %b
  %zext = zext i8 %y to i64
  %not = xor i64 %zext, 0
  br label %latch

latch:
  %cond = phi i64 [ %not, %then ], [ 0, %loop ]
  %trunc = trunc i64 %cond to i16
  store i16 %trunc, ptr %c
  store i32 0, ptr %d
  %iv.next = add i64 %iv, 7
  %done = icmp eq i64 %iv, 0
  br i1 %done, label %exit, label %loop

exit:
  ret void
}