xref: /llvm-project/llvm/test/Transforms/LoopVectorize/vector-loop-backedge-elimination-outside-iv-users.ll (revision 8d90473c3e8f25d7bf1f27275c2354161e47cb0c)

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes='loop-vectorize' -force-vector-width=8 -force-vector-interleave=2 -S %s | FileCheck --check-prefixes=CHECK %s

target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"

define i64 @remove_loop_region_int_iv_used_outside(ptr %dst) {
; CHECK-LABEL: define i64 @remove_loop_region_int_iv_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr ptr, ptr [[DST]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr ptr, ptr [[TMP0]], i32 0
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[TMP0]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP1]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 16, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr ptr, ptr [[DST]], i64 [[IV]]
; CHECK-NEXT:    store ptr null, ptr [[GEP]], align 8
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], 16
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RES:%.*]] = phi i64 [ [[IV]], %[[LOOP]] ], [ 15, %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RES]]
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr ptr, ptr %dst, i64 %iv
  store ptr null, ptr %gep, align 8
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi i64 [ %iv, %loop ]
  ret i64 %res
}

define i64 @remove_loop_region_int_iv_inc_used_outside(ptr %dst) {
; CHECK-LABEL: define i64 @remove_loop_region_int_iv_inc_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr ptr, ptr [[DST]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr ptr, ptr [[TMP0]], i32 0
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[TMP0]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP1]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ 16, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr ptr, ptr [[DST]], i64 [[IV]]
; CHECK-NEXT:    store ptr null, ptr [[GEP]], align 8
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], 16
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RES:%.*]] = phi i64 [ [[IV_NEXT]], %[[LOOP]] ], [ 16, %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RES]]
;
entry:
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr ptr, ptr %dst, i64 %iv
  store ptr null, ptr %gep, align 8
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi i64 [ %iv.next, %loop ]
  ret i64 %res
}

define ptr @remove_loop_region_ptr_iv_used_outside(ptr %dst) {
; CHECK-LABEL: define ptr @remove_loop_region_ptr_iv_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr i8, ptr [[DST]], i64 128
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[NEXT_GEP:%.*]] = getelementptr i8, ptr [[DST]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr ptr, ptr [[NEXT_GEP]], i32 0
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[NEXT_GEP]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP1]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[IND_ESCAPE:%.*]] = getelementptr i8, ptr [[TMP0]], i64 -8
; CHECK-NEXT:    br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi ptr [ [[TMP0]], %[[MIDDLE_BLOCK]] ], [ [[DST]], %[[ENTRY]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i64 [ 16, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[PTR_IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[INT_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL1]], %[[SCALAR_PH]] ], [ [[INT_IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    store ptr null, ptr [[PTR_IV]], align 8
; CHECK-NEXT:    [[INT_IV_NEXT]] = add i64 [[INT_IV]], 1
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr i8, ptr [[PTR_IV]], i64 8
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[INT_IV_NEXT]], 16
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RES:%.*]] = phi ptr [ [[PTR_IV]], %[[LOOP]] ], [ [[IND_ESCAPE]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret ptr [[RES]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
  %int.iv = phi i64 [ 0, %entry ], [ %int.iv.next, %loop ]
  store ptr null, ptr %ptr.iv, align 8
  %int.iv.next = add i64 %int.iv, 1
  %ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 8
  %ec = icmp eq i64 %int.iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi ptr [ %ptr.iv, %loop ]
  ret ptr %res
}

define ptr @remove_loop_region_ptr_iv_inc_used_outside(ptr %dst) {
; CHECK-LABEL: define ptr @remove_loop_region_ptr_iv_inc_used_outside(
; CHECK-SAME: ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr i8, ptr [[DST]], i64 128
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[NEXT_GEP:%.*]] = getelementptr i8, ptr [[DST]], i64 0
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr ptr, ptr [[NEXT_GEP]], i32 0
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr ptr, ptr [[NEXT_GEP]], i32 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP1]], align 8
; CHECK-NEXT:    store <8 x ptr> zeroinitializer, ptr [[TMP2]], align 8
; CHECK-NEXT:    br label %[[MIDDLE_BLOCK:.*]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi ptr [ [[TMP0]], %[[MIDDLE_BLOCK]] ], [ [[DST]], %[[ENTRY]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi i64 [ 16, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[PTR_IV:%.*]] = phi ptr [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[PTR_IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[INT_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL1]], %[[SCALAR_PH]] ], [ [[INT_IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    store ptr null, ptr [[PTR_IV]], align 8
; CHECK-NEXT:    [[INT_IV_NEXT]] = add i64 [[INT_IV]], 1
; CHECK-NEXT:    [[PTR_IV_NEXT]] = getelementptr i8, ptr [[PTR_IV]], i64 8
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[INT_IV_NEXT]], 16
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RES:%.*]] = phi ptr [ [[PTR_IV_NEXT]], %[[LOOP]] ], [ [[TMP0]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret ptr [[RES]]
;
entry:
  br label %loop

loop:
  %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
  %int.iv = phi i64 [ 0, %entry ], [ %int.iv.next, %loop ]
  store ptr null, ptr %ptr.iv, align 8
  %int.iv.next = add i64 %int.iv, 1
  %ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 8
  %ec = icmp eq i64 %int.iv.next, 16
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi ptr [ %ptr.iv.next, %loop ]
  ret ptr %res
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[META2]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META1]], [[META2]]}
; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META1]], [[META2]]}
; CHECK: [[LOOP5]] = distinct !{[[LOOP5]], [[META1]], [[META2]]}
;.