llvm/llvm/test/Transforms/LoopVectorize/AArch64/invariant-replicate-region.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -p loop-vectorize -force-vector-width=4 -S %s | FileCheck %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128-Fn32"
target triple = "arm64-apple-macosx14.0.0"

; Test for https://github.com/llvm/llvm-project/issues/109510.
define i32 @test_invariant_replicate_region(i32 %x, i1 %c) {
; CHECK-LABEL: define i32 @test_invariant_replicate_region(
; CHECK-SAME: i32 [[X:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i1> poison, i1 [[C]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i1> [[BROADCAST_SPLATINSERT]], <4 x i1> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_UREM_CONTINUE6:.*]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = extractelement <4 x i1> [[BROADCAST_SPLAT]], i32 0
; CHECK-NEXT:    br i1 [[TMP0]], label %[[PRED_UREM_IF:.*]], label %[[PRED_UREM_CONTINUE:.*]]
; CHECK:       [[PRED_UREM_IF]]:
; CHECK-NEXT:    [[TMP1:%.*]] = urem i32 10, [[X]]
; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <4 x i32> poison, i32 [[TMP1]], i32 0
; CHECK-NEXT:    br label %[[PRED_UREM_CONTINUE]]
; CHECK:       [[PRED_UREM_CONTINUE]]:
; CHECK-NEXT:    [[TMP3:%.*]] = phi <4 x i32> [ poison, %[[VECTOR_BODY]] ], [ [[TMP2]], %[[PRED_UREM_IF]] ]
; CHECK-NEXT:    [[TMP4:%.*]] = extractelement <4 x i1> [[BROADCAST_SPLAT]], i32 1
; CHECK-NEXT:    br i1 [[TMP4]], label %[[PRED_UREM_IF1:.*]], label %[[PRED_UREM_CONTINUE2:.*]]
; CHECK:       [[PRED_UREM_IF1]]:
; CHECK-NEXT:    [[TMP5:%.*]] = urem i32 10, [[X]]
; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <4 x i32> [[TMP3]], i32 [[TMP5]], i32 1
; CHECK-NEXT:    br label %[[PRED_UREM_CONTINUE2]]
; CHECK:       [[PRED_UREM_CONTINUE2]]:
; CHECK-NEXT:    [[TMP7:%.*]] = phi <4 x i32> [ [[TMP3]], %[[PRED_UREM_CONTINUE]] ], [ [[TMP6]], %[[PRED_UREM_IF1]] ]
; CHECK-NEXT:    [[TMP8:%.*]] = extractelement <4 x i1> [[BROADCAST_SPLAT]], i32 2
; CHECK-NEXT:    br i1 [[TMP8]], label %[[PRED_UREM_IF3:.*]], label %[[PRED_UREM_CONTINUE4:.*]]
; CHECK:       [[PRED_UREM_IF3]]:
; CHECK-NEXT:    [[TMP9:%.*]] = urem i32 10, [[X]]
; CHECK-NEXT:    [[TMP10:%.*]] = insertelement <4 x i32> [[TMP7]], i32 [[TMP9]], i32 2
; CHECK-NEXT:    br label %[[PRED_UREM_CONTINUE4]]
; CHECK:       [[PRED_UREM_CONTINUE4]]:
; CHECK-NEXT:    [[TMP11:%.*]] = phi <4 x i32> [ [[TMP7]], %[[PRED_UREM_CONTINUE2]] ], [ [[TMP10]], %[[PRED_UREM_IF3]] ]
; CHECK-NEXT:    [[TMP12:%.*]] = extractelement <4 x i1> [[BROADCAST_SPLAT]], i32 3
; CHECK-NEXT:    br i1 [[TMP12]], label %[[PRED_UREM_IF5:.*]], label %[[PRED_UREM_CONTINUE6]]
; CHECK:       [[PRED_UREM_IF5]]:
; CHECK-NEXT:    [[TMP13:%.*]] = urem i32 10, [[X]]
; CHECK-NEXT:    [[TMP14:%.*]] = insertelement <4 x i32> [[TMP11]], i32 [[TMP13]], i32 3
; CHECK-NEXT:    br label %[[PRED_UREM_CONTINUE6]]
; CHECK:       [[PRED_UREM_CONTINUE6]]:
; CHECK-NEXT:    [[TMP15:%.*]] = phi <4 x i32> [ [[TMP11]], %[[PRED_UREM_CONTINUE4]] ], [ [[TMP14]], %[[PRED_UREM_IF5]] ]
; CHECK-NEXT:    [[PREDPHI:%.*]] = select <4 x i1> [[BROADCAST_SPLAT]], <4 x i32> [[TMP15]], <4 x i32> zeroinitializer
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP16:%.*]] = icmp eq i32 [[INDEX_NEXT]], 100
; CHECK-NEXT:    br i1 [[TMP16]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP17:%.*]] = extractelement <4 x i32> [[PREDPHI]], i32 3
; CHECK-NEXT:    br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i32 [ 100, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP_HEADER:.*]]
; CHECK:       [[LOOP_HEADER]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
; CHECK-NEXT:    br i1 [[C]], label %[[THEN:.*]], label %[[LOOP_LATCH]]
; CHECK:       [[THEN]]:
; CHECK-NEXT:    [[REM_1:%.*]] = urem i32 10, [[X]]
; CHECK-NEXT:    br label %[[LOOP_LATCH]]
; CHECK:       [[LOOP_LATCH]]:
; CHECK-NEXT:    [[RES:%.*]] = phi i32 [ 0, %[[LOOP_HEADER]] ], [ [[REM_1]], %[[THEN]] ]
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i32 [[IV]], 99
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP_HEADER]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RES_LCSSA:%.*]] = phi i32 [ [[RES]], %[[LOOP_LATCH]] ], [ [[TMP17]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i32 [[RES_LCSSA]]
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop.latch ]
  br i1 %c, label %then, label %loop.latch

then:
  %rem.1 = urem i32 10, %x
  br label %loop.latch

loop.latch:
  %res = phi i32 [ 0, %loop.header ], [ %rem.1, %then ]
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv, 99
  br i1 %ec, label %exit, label %loop.header

exit:
  ret i32 %res
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}
;.