llvm/test/Transforms/LoopVectorize/uniform-args-call-variants.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 6
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -S | FileCheck %s

; A call whose argument can remain a scalar for a vectorized function variant
; with a uniform argument because it's loop invariant
define void @test_uniform(ptr noalias %dst, ptr readonly %src, i64 %uniform , i64 %n) {
; CHECK-LABEL: define void @test_uniform(
; CHECK-SAME: ptr noalias [[DST:%.*]], ptr readonly [[SRC:%.*]], i64 [[UNIFORM:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = and i64 [[N]], 1
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[TMP0]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr double, ptr [[SRC]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <2 x double>, ptr [[TMP1]], align 8
; CHECK-NEXT:    [[TMP2:%.*]] = call <2 x double> @foo_uniform(<2 x double> [[WIDE_LOAD]], i64 [[UNIFORM]])
; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr inbounds double, ptr [[DST]], i64 [[INDEX]]
; CHECK-NEXT:    store <2 x double> [[TMP2]], ptr [[TMP3]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT:    [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP4]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[FOR_COND_CLEANUP:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[GEPSRC:%.*]] = getelementptr double, ptr [[SRC]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[DATA:%.*]] = load double, ptr [[GEPSRC]], align 8
; CHECK-NEXT:    [[CALL:%.*]] = call double @foo(double [[DATA]], i64 [[UNIFORM]]) #[[ATTR0:[0-9]+]]
; CHECK-NEXT:    [[GEPDST:%.*]] = getelementptr inbounds double, ptr [[DST]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store double [[CALL]], ptr [[GEPDST]], align 8
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
  %gepsrc = getelementptr double, ptr %src, i64 %indvars.iv
  %data = load double, ptr %gepsrc, align 8
  %call = call double @foo(double %data, i64 %uniform) #0
  %gepdst = getelementptr inbounds double, ptr %dst, i64 %indvars.iv
  store double %call, ptr %gepdst
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret void
}

; If the parameter is not uniform, then we can't use the vector variant and
; must fall back to scalarization.
define void @test_uniform_not_invariant(ptr noalias %dst, ptr readonly %src, i64 %n) {
; CHECK-LABEL: define void @test_uniform_not_invariant(
; CHECK-SAME: ptr noalias [[DST:%.*]], ptr readonly [[SRC:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 2
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP0:%.*]] = and i64 [[N]], 1
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[N]], [[TMP0]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr double, ptr [[SRC]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <2 x double>, ptr [[TMP2]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = extractelement <2 x double> [[WIDE_LOAD]], i64 0
; CHECK-NEXT:    [[TMP4:%.*]] = call double @foo(double [[TMP3]], i64 [[INDEX]]) #[[ATTR0]]
; CHECK-NEXT:    [[TMP5:%.*]] = extractelement <2 x double> [[WIDE_LOAD]], i64 1
; CHECK-NEXT:    [[TMP6:%.*]] = call double @foo(double [[TMP5]], i64 [[TMP1]]) #[[ATTR0]]
; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x double> poison, double [[TMP4]], i64 0
; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <2 x double> [[TMP7]], double [[TMP6]], i64 1
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr inbounds double, ptr [[DST]], i64 [[INDEX]]
; CHECK-NEXT:    store <2 x double> [[TMP8]], ptr [[TMP9]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP10]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[N]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[FOR_COND_CLEANUP:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[GEPSRC:%.*]] = getelementptr double, ptr [[SRC]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    [[DATA:%.*]] = load double, ptr [[GEPSRC]], align 8
; CHECK-NEXT:    [[CALL:%.*]] = call double @foo(double [[DATA]], i64 [[INDVARS_IV]]) #[[ATTR0]]
; CHECK-NEXT:    [[GEPDST:%.*]] = getelementptr inbounds double, ptr [[DST]], i64 [[INDVARS_IV]]
; CHECK-NEXT:    store double [[CALL]], ptr [[GEPDST]], align 8
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND]], label %[[FOR_COND_CLEANUP]], label %[[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       [[FOR_COND_CLEANUP]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %for.body

for.body:
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
  %gepsrc = getelementptr double, ptr %src, i64 %indvars.iv
  %data = load double, ptr %gepsrc, align 8
  %call = call double @foo(double %data, i64 %indvars.iv) #0
  %gepdst = getelementptr inbounds double, ptr %dst, i64 %indvars.iv
  store double %call, ptr %gepdst
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv.next, %n
  br i1 %exitcond, label %for.cond.cleanup, label %for.body

for.cond.cleanup:
  ret void
}

; Scalar functions
declare double @foo(double, i64)

; Vector variants
declare <2 x double> @foo_uniform(<2 x double>, i64)

; Mappings
attributes #0 = { nounwind "vector-function-abi-variant"="_ZGV_LLVM_N2vu_foo(foo_uniform)" }