llvm/test/Transforms/LoopVectorize/pr154045-dont-fold-extractelement-livein.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
; RUN: opt -p loop-vectorize -force-vector-width=2 -force-widen-divrem-via-safe-divisor=false -S %s | FileCheck %s

; Make sure we don't try to fold a Instruction::ExtractElement ir<0>, ir<0>,
; since we can't materialize the live-in for the vector operand.

define void @pr154045(ptr %p, i1 %c, i64 %x) {
; CHECK-LABEL: define void @pr154045(
; CHECK-SAME: ptr [[P:%.*]], i1 [[C:%.*]], i64 [[X:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i1> poison, i1 [[C]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i1> [[BROADCAST_SPLATINSERT]], <2 x i1> poison, <2 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP0:%.*]] = xor <2 x i1> [[BROADCAST_SPLAT]], splat (i1 true)
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP1:%.*]] = extractelement <2 x i1> [[TMP0]], i32 0
; CHECK-NEXT:    br i1 [[TMP1]], label %[[PRED_SREM_IF:.*]], label %[[PRED_SREM_CONTINUE:.*]]
; CHECK:       [[PRED_SREM_IF]]:
; CHECK-NEXT:    br label %[[PRED_SREM_CONTINUE]]
; CHECK:       [[PRED_SREM_CONTINUE]]:
; CHECK-NEXT:    [[TMP2:%.*]] = extractelement <2 x i1> [[TMP0]], i32 1
; CHECK-NEXT:    br i1 [[TMP2]], label %[[PRED_SREM_IF1:.*]], label %[[PRED_SREM_CONTINUE2:.*]]
; CHECK:       [[PRED_SREM_IF1]]:
; CHECK-NEXT:    br label %[[PRED_SREM_CONTINUE2]]
; CHECK:       [[PRED_SREM_CONTINUE2]]:
; CHECK-NEXT:    store i32 0, ptr [[P]], align 4
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %latch ]
  br i1 %c, label %latch, label %else

else:
  %rem = srem i64 0, %x
  br label %latch

latch:
  %phi = phi i64 [ %rem, %else ], [ 0, %loop ]
  %phi.trunc = trunc i64 %phi to i32
  %shl = shl i32 %phi.trunc, 0
  store i32 %shl, ptr %p
  %iv.next = add i64 %iv, 1
  %exitcond = icmp eq i64 %iv, 1
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}