test/Transforms/LoopVectorize/phi-with-fastflags.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
; RUN: opt -p loop-vectorize -force-vector-width=4 -S < %s | FileCheck %s

define void @f(ptr noalias %p, i1 %c) {
; CHECK-LABEL: define void @f(
; CHECK-SAME: ptr noalias [[P:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr float, ptr [[P]], i32 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x float>, ptr [[TMP0]], align 4
; CHECK-NEXT:    [[PREDPHI:%.*]] = select fast i1 [[C]], <4 x float> zeroinitializer, <4 x float> [[WIDE_LOAD]]
; CHECK-NEXT:    store <4 x float> [[PREDPHI]], ptr [[TMP0]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq i32 [[INDEX_NEXT]], 1024
; CHECK-NEXT:    br i1 [[TMP1]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
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
}