llvm/test/Transforms/LoopVectorize/VPlan/phi-with-fastflags-vplan.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6
; RUN: opt -p loop-vectorize -force-vector-width=4 -vplan-print-after=printOptimizedVPlan -disable-output -S %s 2>&1 | FileCheck %s

define void @f(ptr noalias %p, i1 %c) {
; CHECK-LABEL: VPlan for loop in 'f'
; CHECK:  VPlan 'Initial VPlan for VF={4},UF>=1' {
; CHECK-NEXT:  Live-in vp<[[VP0:%[0-9]+]]> = VF
; CHECK-NEXT:  Live-in vp<[[VP1:%[0-9]+]]> = VF * UF
; CHECK-NEXT:  Live-in vp<[[VP2:%[0-9]+]]> = vector-trip-count
; CHECK-NEXT:  Live-in ir<1024> = original trip-count
; CHECK-EMPTY:
; CHECK-NEXT:  ir-bb<entry>:
; CHECK-NEXT:  Successor(s): scalar.ph, vector.ph
; CHECK-EMPTY:
; CHECK-NEXT:  vector.ph:
; CHECK-NEXT:  Successor(s): vector loop
; CHECK-EMPTY:
; CHECK-NEXT:  <x1> vector loop: {
; CHECK-NEXT:  vp<[[VP3:%[0-9]+]]> = CANONICAL-IV
; CHECK-EMPTY:
; CHECK-NEXT:    vector.body:
; CHECK-NEXT:      vp<[[VP4:%[0-9]+]]> = SCALAR-STEPS vp<[[VP3]]>, ir<1>, vp<[[VP0]]>
; CHECK-NEXT:      CLONE ir<%gep> = getelementptr ir<%p>, vp<[[VP4]]>
; CHECK-NEXT:      vp<[[VP5:%[0-9]+]]> = vector-pointer float, ir<%gep>, ir<1>
; CHECK-NEXT:      WIDEN ir<%x> = load vp<[[VP5]]>
; CHECK-NEXT:      BLEND ir<%phi> = fast ir<%x> ir<0.000000e+00>/ir<%c>
; CHECK-NEXT:      WIDEN store vp<[[VP5]]>, ir<%phi>
; CHECK-NEXT:      EMIT vp<%index.next> = add nuw vp<[[VP3]]>, vp<[[VP1]]>
; CHECK-NEXT:      EMIT branch-on-count vp<%index.next>, vp<[[VP2]]>
; CHECK-NEXT:    No successors
; CHECK-NEXT:  }
; CHECK-NEXT:  Successor(s): middle.block
; CHECK-EMPTY:
; CHECK-NEXT:  middle.block:
; CHECK-NEXT:    EMIT vp<%cmp.n> = icmp eq ir<1024>, vp<[[VP2]]>
; CHECK-NEXT:    EMIT branch-on-cond vp<%cmp.n>
; CHECK-NEXT:  Successor(s): ir-bb<exit>, scalar.ph
; CHECK-EMPTY:
; CHECK-NEXT:  ir-bb<exit>:
; CHECK-NEXT:  No successors
; CHECK-EMPTY:
; CHECK-NEXT:  scalar.ph:
; CHECK-NEXT:    EMIT-SCALAR vp<%bc.resume.val> = phi [ vp<[[VP2]]>, middle.block ], [ ir<0>, ir-bb<entry> ]
; CHECK-NEXT:  Successor(s): ir-bb<loop>
; CHECK-EMPTY:
; CHECK-NEXT:  ir-bb<loop>:
; CHECK-NEXT:    IR   %iv = phi i32 [ 0, %entry ], [ %iv.next, %latch ] (extra operand: vp<%bc.resume.val> from scalar.ph)
; CHECK-NEXT:    IR   %gep = getelementptr float, ptr %p, i32 %iv
; CHECK-NEXT:    IR   %x = load float, ptr %gep, align 4
; CHECK-NEXT:  No successors
; CHECK-NEXT:  }
;
entry:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %latch ]
  %gep = getelementptr float, ptr %p, i32 %iv
  %x = load float, ptr %gep
  br i1 %c, label %then, label %latch

then:
  br label %latch

latch:
  %phi = phi fast float [ %x, %loop ], [ 0.0, %then ]
  store float %phi, ptr %gep
  %iv.next = add i32 %iv, 1
  %done = icmp eq i32 %iv.next, 1024
  br i1 %done, label %exit, label %loop

exit:
  ret void
}