llvm/test/CodeGen/RISCV/riscv-codegenprepare.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt %s -S -riscv-codegenprepare -mtriple=riscv64 | FileCheck %s

; Make sure we convert the 4294967294 in for.body.preheader.new to -2 based on
; the upper 33 bits being zero by the dominating condition %cmp3.
define void @test2(ptr nocapture noundef %a, i32 noundef signext %n) {
; CHECK-LABEL: @test2(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[CMP3:%.*]] = icmp sgt i32 [[N:%.*]], 0
; CHECK-NEXT:    br i1 [[CMP3]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK:       for.body.preheader:
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = zext nneg i32 [[N]] to i64
; CHECK-NEXT:    [[XTRAITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 1
; CHECK-NEXT:    [[TMP0:%.*]] = icmp eq i32 [[N]], 1
; CHECK-NEXT:    br i1 [[TMP0]], label [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA:%.*]], label [[FOR_BODY_PREHEADER_NEW:%.*]]
; CHECK:       for.body.preheader.new:
; CHECK-NEXT:    [[UNROLL_ITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], -2
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.cond.cleanup.loopexit.unr-lcssa:
; CHECK-NEXT:    [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT_1:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0
; CHECK-NEXT:    br i1 [[LCMP_MOD_NOT]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY_EPIL:%.*]]
; CHECK:       for.body.epil:
; CHECK-NEXT:    [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDVARS_IV_UNR]]
; CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX_EPIL]], align 4
; CHECK-NEXT:    [[ADD_EPIL:%.*]] = add nsw i32 [[TMP1]], 4
; CHECK-NEXT:    store i32 [[ADD_EPIL]], ptr [[ARRAYIDX_EPIL]], align 4
; CHECK-NEXT:    br label [[FOR_COND_CLEANUP]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
; CHECK:       for.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_1]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[NITER:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP2]], 4
; CHECK-NEXT:    store i32 [[ADD]], ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[INDVARS_IV_NEXT:%.*]] = or i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV_NEXT]]
; CHECK-NEXT:    [[TMP3:%.*]] = load i32, ptr [[ARRAYIDX_1]], align 4
; CHECK-NEXT:    [[ADD_1:%.*]] = add nsw i32 [[TMP3]], 4
; CHECK-NEXT:    store i32 [[ADD_1]], ptr [[ARRAYIDX_1]], align 4
; CHECK-NEXT:    [[INDVARS_IV_NEXT_1]] = add nuw nsw i64 [[INDVARS_IV]], 2
; CHECK-NEXT:    [[NITER_NEXT_1]] = add i64 [[NITER]], 2
; CHECK-NEXT:    [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]]
; CHECK-NEXT:    br i1 [[NITER_NCMP_1]], label [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]], label [[FOR_BODY]]
;
entry:
  %cmp3 = icmp sgt i32 %n, 0
  br i1 %cmp3, label %for.body.preheader, label %for.cond.cleanup

for.body.preheader:                               ; preds = %entry
  %wide.trip.count = zext nneg i32 %n to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %0 = icmp eq i32 %n, 1
  br i1 %0, label %for.cond.cleanup.loopexit.unr-lcssa, label %for.body.preheader.new

for.body.preheader.new:                           ; preds = %for.body.preheader
  %unroll_iter = and i64 %wide.trip.count, 4294967294
  br label %for.body

for.cond.cleanup.loopexit.unr-lcssa:              ; preds = %for.body, %for.body.preheader
  %indvars.iv.unr = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next.1, %for.body ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %for.cond.cleanup, label %for.body.epil

for.body.epil:                                    ; preds = %for.cond.cleanup.loopexit.unr-lcssa
  %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr
  %1 = load i32, ptr %arrayidx.epil, align 4
  %add.epil = add nsw i32 %1, 4
  store i32 %add.epil, ptr %arrayidx.epil, align 4
  br label %for.cond.cleanup

for.cond.cleanup:                                 ; preds = %for.body.epil, %for.cond.cleanup.loopexit.unr-lcssa, %entry
  ret void

for.body:                                         ; preds = %for.body, %for.body.preheader.new
  %indvars.iv = phi i64 [ 0, %for.body.preheader.new ], [ %indvars.iv.next.1, %for.body ]
  %niter = phi i64 [ 0, %for.body.preheader.new ], [ %niter.next.1, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
  %2 = load i32, ptr %arrayidx, align 4
  %add = add nsw i32 %2, 4
  store i32 %add, ptr %arrayidx, align 4
  %indvars.iv.next = or i64 %indvars.iv, 1
  %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next
  %3 = load i32, ptr %arrayidx.1, align 4
  %add.1 = add nsw i32 %3, 4
  store i32 %add.1, ptr %arrayidx.1, align 4
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %for.cond.cleanup.loopexit.unr-lcssa, label %for.body
}

; Make sure we do not change 4294967295 to -1 here.
define i64 @bug(i32 %x) {
; CHECK-LABEL: @bug(
; CHECK-NEXT:    [[A:%.*]] = sext i32 [[X:%.*]] to i64
; CHECK-NEXT:    [[B:%.*]] = and i64 [[A]], 4294967295
; CHECK-NEXT:    ret i64 [[B]]
;
  %a = sext i32 %x to i64
  %b = and i64 %a, 4294967295
  ret i64 %b
}

define i1 @widen_anyof_rdx(ptr %p, i64 %n) {
; CHECK-LABEL: @widen_anyof_rdx(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = phi <vscale x 4 x i8> [ zeroinitializer, [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[AVL:%.*]] = sub i64 [[N:%.*]], [[IV]]
; CHECK-NEXT:    [[EVL:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IV]]
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr [[GEP]], <vscale x 4 x i1> splat (i1 true), i32 [[EVL]])
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne <vscale x 4 x i32> [[X]], zeroinitializer
; CHECK-NEXT:    [[TMP1]] = call <vscale x 4 x i8> @llvm.vp.merge.nxv4i8(<vscale x 4 x i1> [[CMP]], <vscale x 4 x i8> splat (i8 1), <vscale x 4 x i8> [[TMP0]], i32 [[EVL]])
; CHECK-NEXT:    [[TMP4:%.*]] = trunc <vscale x 4 x i8> [[TMP1]] to <vscale x 4 x i1>
; CHECK-NEXT:    [[EVL_ZEXT:%.*]] = zext i32 [[EVL]] to i64
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], [[EVL_ZEXT]]
; CHECK-NEXT:    [[DONE:%.*]] = icmp sge i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[DONE]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[TMP4]])
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %loop
loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %phi = phi <vscale x 4 x i1> [ zeroinitializer, %entry ], [ %rec, %loop ]
  %avl = sub i64 %n, %iv
  %evl = call i32 @llvm.experimental.get.vector.length(i64 %avl, i32 4, i1 true)

  %gep = getelementptr i32, ptr %p, i64 %iv
  %x = call <vscale x 4 x i32> @llvm.vp.load(ptr %gep, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  %cmp = icmp ne <vscale x 4 x i32> %x, zeroinitializer
  %rec = call <vscale x 4 x i1> @llvm.vp.merge(<vscale x 4 x i1> %cmp, <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> %phi, i32 %evl)

  %evl.zext = zext i32 %evl to i64
  %iv.next = add i64 %iv, %evl.zext
  %done = icmp sge i64 %iv.next, %n
  br i1 %done, label %exit, label %loop
exit:
  %res = call i1 @llvm.vector.reduce.or(<vscale x 4 x i1> %rec)
  ret i1 %res
}


define i1 @widen_anyof_rdx_use_in_loop(ptr %p, i64 %n) {
; CHECK-LABEL: @widen_anyof_rdx_use_in_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = phi <vscale x 4 x i8> [ zeroinitializer, [[ENTRY]] ], [ [[TMP1:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[AVL:%.*]] = sub i64 [[N:%.*]], [[IV]]
; CHECK-NEXT:    [[EVL:%.*]] = call i32 @llvm.experimental.get.vector.length.i64(i64 [[AVL]], i32 4, i1 true)
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[P:%.*]], i64 [[IV]]
; CHECK-NEXT:    [[X:%.*]] = call <vscale x 4 x i32> @llvm.vp.load.nxv4i32.p0(ptr [[GEP]], <vscale x 4 x i1> splat (i1 true), i32 [[EVL]])
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne <vscale x 4 x i32> [[X]], zeroinitializer
; CHECK-NEXT:    [[TMP1]] = call <vscale x 4 x i8> @llvm.vp.merge.nxv4i8(<vscale x 4 x i1> [[CMP]], <vscale x 4 x i8> splat (i8 1), <vscale x 4 x i8> [[TMP0]], i32 [[EVL]])
; CHECK-NEXT:    [[REC:%.*]] = trunc <vscale x 4 x i8> [[TMP1]] to <vscale x 4 x i1>
; CHECK-NEXT:    store <vscale x 4 x i1> [[REC]], ptr [[GEP]], align 1
; CHECK-NEXT:    [[EVL_ZEXT:%.*]] = zext i32 [[EVL]] to i64
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], [[EVL_ZEXT]]
; CHECK-NEXT:    [[DONE:%.*]] = icmp sge i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[DONE]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    [[RES:%.*]] = call i1 @llvm.vector.reduce.or.nxv4i1(<vscale x 4 x i1> [[REC]])
; CHECK-NEXT:    ret i1 [[RES]]
;
entry:
  br label %loop
loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %phi = phi <vscale x 4 x i1> [ zeroinitializer, %entry ], [ %rec, %loop ]
  %avl = sub i64 %n, %iv
  %evl = call i32 @llvm.experimental.get.vector.length(i64 %avl, i32 4, i1 true)

  %gep = getelementptr i32, ptr %p, i64 %iv
  %x = call <vscale x 4 x i32> @llvm.vp.load(ptr %gep, <vscale x 4 x i1> splat (i1 true), i32 %evl)
  %cmp = icmp ne <vscale x 4 x i32> %x, zeroinitializer
  %rec = call <vscale x 4 x i1> @llvm.vp.merge(<vscale x 4 x i1> %cmp, <vscale x 4 x i1> splat (i1 true), <vscale x 4 x i1> %phi, i32 %evl)

  store <vscale x 4 x i1> %rec, ptr %gep

  %evl.zext = zext i32 %evl to i64
  %iv.next = add i64 %iv, %evl.zext
  %done = icmp sge i64 %iv.next, %n
  br i1 %done, label %exit, label %loop
exit:
  %res = call i1 @llvm.vector.reduce.or(<vscale x 4 x i1> %rec)
  ret i1 %res
}