llvm/test/CodeGen/NVPTX/b52037.ll

; Reproducer for a bad performance regression triggered by switch to the new PM.
; `barney` ended up with the local variables not being optimized away and that
; had rather dramatic effect on some GPU code. See
; https://bugs.llvm.org/show_bug.cgi?id=52037 for the gory details.
;
; RUN: llc -mtriple=nvptx64-nvidia-cuda -mcpu=sm_70 -O3 -o - %s | FileCheck %s
; RUN: %if ptxas %{ llc -mtriple=nvptx64-nvidia-cuda -mcpu=sm_70 -O3 -o - %s | %ptxas-verify -arch=sm_70 %}

; CHECK-LABEL: .visible .entry barney(
; CHECK-NOT:  .local{{.*}}__local_depot
; CHECK: ret;

source_filename = "reduced.1.ll"
target triple = "nvptx64-nvidia-cuda"

%char3 = type { i8, i8, i8 }
%float4 = type { float, float, float, float }
%float3 = type { float, float, float }
%int3 = type { i32, i32, i32 }
%struct.spam.2 = type { %struct.foo.3, ptr, float, float, i32, float }
%struct.foo.3 = type <{ ptr, ptr, ptr, ptr, ptr, i32, i32, float }>
%struct.zot = type { %struct.bar, [8 x i8], %struct.foo, [12 x i8] }
%struct.bar = type { ptr }
%struct.foo = type <{ ptr, %float4, %int3, i32, %float3, [4 x i8], i64, i32, i8, [3 x i8], i32 }>

@global = external local_unnamed_addr addrspace(4) externally_initialized global [27 x %char3], align 1
@global_1 = linkonce_odr unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr inttoptr (i64 16 to ptr), ptr null, ptr null] }, align 8

; Function Attrs: argmemonly mustprogress nofree nounwind willreturn
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

declare %float4 @snork(float) local_unnamed_addr

declare %float3 @bar_2(float, float) local_unnamed_addr

declare %float3 @zot() local_unnamed_addr

declare %int3 @hoge(i32, i32, i32) local_unnamed_addr

declare i64 @foo() local_unnamed_addr

define void @barney(ptr nocapture readonly %arg) local_unnamed_addr {
bb:
  tail call void asm sideeffect "// KEEP", ""() #1
  %tmp = alloca %struct.zot, align 16
  %tmp4 = getelementptr inbounds %struct.spam.2, ptr %arg, i64 0, i32 1
  %tmp5 = load ptr, ptr %tmp4, align 8
  %tmp9 = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 1
  store ptr %tmp5, ptr %tmp9, align 8
  store ptr getelementptr inbounds ({ [3 x ptr] }, ptr @global_1, i64 0, inrange i32 0, i64 3), ptr %tmp, align 16
  %tmp.i1 = tail call i64 @foo()
  %tmp44.i16 = getelementptr inbounds i16, ptr %tmp5, i64 undef
  %tmp45.i17 = load i16, ptr %tmp44.i16, align 2
  %tmp47.i18 = icmp eq i16 %tmp45.i17, -1
  br i1 %tmp47.i18, label %bb14, label %bb49.i.lr.ph

bb49.i.lr.ph:                                     ; preds = %bb
  %tmp7.i6 = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2
  %extract = lshr i16 %tmp45.i17, 11
  %extract.t = trunc i16 %extract to i8
  %0 = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2
  %tmp58.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 1, i32 2
  %tmp59.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 4, i32 2
  %tmp62.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 2, i32 2
  %1 = getelementptr inbounds %struct.foo, ptr %0, i64 1
  %tmp64.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 10
  %tmp19.i.i = load float, ptr %tmp58.i, align 16
  %tmp23.i.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 2
  %tmp24.i.i = load float, ptr %tmp23.i.i, align 8
  %2 = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 5, i64 0
  %.repack3.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 6
  %tmp41.i.i = load i32, ptr %tmp62.i, align 16
  %tmp48.i.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 3
  %tmp49.i.i = load i32, ptr %tmp48.i.i, align 4
  %tmp54.i.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 4
  %tmp55.i.i = load i32, ptr %tmp54.i.i, align 8
  %tmp9.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 7
  %tmp40.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 4, i32 1
  %tmp41.i = load i32, ptr %tmp40.i, align 4
  %tmp42.i = zext i32 %tmp41.i to i64
  %tmp7.i = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2
  %tmp17.pre = load ptr, ptr %tmp, align 16
  %tmp61.i.peel = load ptr, ptr %tmp7.i6, align 16
  %tmp10.i.i.peel = add nsw i8 %extract.t, -1
  store i8 %tmp10.i.i.peel, ptr %1, align 4
  %tmp13.i.i.peel = tail call %float3 @zot() #1
  %tmp15.i.i.peel = extractvalue %float3 %tmp13.i.i.peel, 0
  %tmp22.i.i.peel = fsub contract float %tmp19.i.i, %tmp15.i.i.peel
  %tmp17.i.i.peel = extractvalue %float3 %tmp13.i.i.peel, 2
  %tmp27.i.i.peel = fsub contract float %tmp24.i.i, %tmp17.i.i.peel
  %tmp28.i.i.peel = tail call %float3 @bar_2(float %tmp22.i.i.peel, float %tmp27.i.i.peel) #1
  %tmp28.i.elt.i.peel = extractvalue %float3 %tmp28.i.i.peel, 0
  store float %tmp28.i.elt.i.peel, ptr %tmp59.i, align 16
  %tmp28.i.elt2.i.peel = extractvalue %float3 %tmp28.i.i.peel, 1
  store float %tmp28.i.elt2.i.peel, ptr %2, align 4
  %tmp28.i.elt4.i.peel = extractvalue %float3 %tmp28.i.i.peel, 2
  store float %tmp28.i.elt4.i.peel, ptr %.repack3.i, align 8
  %tmp38.i.i.peel = zext i8 %tmp10.i.i.peel to i64
  %tmp39.i5.i.peel = getelementptr inbounds [27 x %char3], ptr addrspace(4) @global, i64 0, i64 %tmp38.i.i.peel
  %tmp39.i.i.peel = addrspacecast ptr addrspace(4) %tmp39.i5.i.peel to ptr
  %tmp43.i.i.peel = load i8, ptr %tmp39.i.i.peel, align 1
  %tmp44.i.i.peel = sext i8 %tmp43.i.i.peel to i32
  %tmp45.i.i.peel = add nsw i32 %tmp41.i.i, %tmp44.i.i.peel
  %tmp50.i.i.peel = getelementptr inbounds %char3, ptr %tmp39.i.i.peel, i64 0, i32 1
  %tmp51.i.i.peel = load i8, ptr %tmp50.i.i.peel, align 1
  %tmp52.i.i.peel = sext i8 %tmp51.i.i.peel to i32
  %tmp53.i.i.peel = add nsw i32 %tmp49.i.i, %tmp52.i.i.peel
  %tmp56.i.i.peel = getelementptr inbounds %char3, ptr %tmp39.i.i.peel, i64 0, i32 2
  %tmp57.i.i.peel = load i8, ptr %tmp56.i.i.peel, align 1
  %tmp58.i.i.peel = sext i8 %tmp57.i.i.peel to i32
  %tmp59.i.i.peel = add nsw i32 %tmp55.i.i, %tmp58.i.i.peel
  %tmp60.i.i.peel = tail call %int3 @hoge(i32 %tmp45.i.i.peel, i32 %tmp53.i.i.peel, i32 %tmp59.i.i.peel) #1
  %tmp61.i.i.peel = getelementptr inbounds i32, ptr %tmp61.i.peel, i64 undef
  %tmp62.i.i.peel = load i32, ptr %tmp61.i.i.peel, align 4
  store i32 %tmp62.i.i.peel, ptr %tmp64.i, align 8
  %tmp22.peel = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2
  %tmp24.peel = getelementptr inbounds i8, ptr %tmp22.peel, i64 80
  %tmp25.peel = load i32, ptr %tmp24.peel, align 16
  %tmp36.peel = load ptr, ptr %arg, align 8
  %tmp37.peel = zext i32 %tmp25.peel to i64
  %tmp38.peel = getelementptr inbounds %float4, ptr %tmp36.peel, i64 %tmp37.peel
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 undef, ptr align 1 %tmp38.peel, i64 undef, i1 false)
  %tmp40.peel = getelementptr inbounds %struct.zot, ptr %tmp, i64 0, i32 2, i32 4, i32 2
  %tmp41.peel25 = getelementptr inbounds float, ptr %tmp40.peel, i64 2
  %tmp42.peel = load float, ptr %tmp41.peel25, align 8
  %tmp44.peel = load float, ptr inttoptr (i64 8 to ptr), align 8
  %tmp45.peel = fsub contract float %tmp42.peel, %tmp44.peel
  %tmp46.peel = tail call %float4 @snork(float %tmp45.peel)
  %tmp.i.peel = tail call i64 @foo()
  %tmp10.i.peel = load i64, ptr %tmp9.i, align 16
  %tmp11.i.peel = add i64 %tmp10.i.peel, %tmp.i.peel
  store i64 %tmp11.i.peel, ptr %tmp9.i, align 16, !tbaa !1
  %tmp43.i.peel = add i64 %tmp11.i.peel, %tmp42.i
  %tmp44.i.peel = getelementptr inbounds i16, ptr %tmp5, i64 %tmp43.i.peel
  %tmp45.i.peel = load i16, ptr %tmp44.i.peel, align 2
  %tmp47.i.peel = icmp eq i16 %tmp45.i.peel, -1
  %extract21.peel = lshr i16 %tmp45.i.peel, 11
  %extract.t22.peel = trunc i16 %extract21.peel to i8
  br i1 %tmp47.i.peel, label %bb14, label %bb49.i.lr.ph.peel.newph

bb49.i.lr.ph.peel.newph:                          ; preds = %bb49.i.lr.ph
  %tmp61.i = load ptr, ptr %tmp7.i, align 16
  %tmp61.i.i = getelementptr inbounds i32, ptr %tmp61.i, i64 undef
  %tmp18 = getelementptr i8, ptr %tmp17.pre, i64 -24
  br label %bb49.i

bb49.i:                                           ; preds = %bb49.i, %bb49.i.lr.ph.peel.newph
  %tmp45.i20.off11 = phi i8 [ %extract.t22.peel, %bb49.i.lr.ph.peel.newph ], [ %extract.t22, %bb49.i ]
  %tmp10.i.i = add nsw i8 %tmp45.i20.off11, -1
  store i8 %tmp10.i.i, ptr %1, align 4
  %tmp13.i.i = tail call %float3 @zot() #1
  %tmp15.i.i = extractvalue %float3 %tmp13.i.i, 0
  %tmp22.i.i = fsub contract float %tmp19.i.i, %tmp15.i.i
  %tmp17.i.i = extractvalue %float3 %tmp13.i.i, 2
  %tmp27.i.i = fsub contract float %tmp24.i.i, %tmp17.i.i
  %tmp28.i.i = tail call %float3 @bar_2(float %tmp22.i.i, float %tmp27.i.i) #1
  %tmp28.i.elt.i = extractvalue %float3 %tmp28.i.i, 0
  store float %tmp28.i.elt.i, ptr %tmp59.i, align 16
  %tmp28.i.elt2.i = extractvalue %float3 %tmp28.i.i, 1
  store float %tmp28.i.elt2.i, ptr %2, align 4
  %tmp28.i.elt4.i = extractvalue %float3 %tmp28.i.i, 2
  store float %tmp28.i.elt4.i, ptr %.repack3.i, align 8
  %tmp38.i.i = zext i8 %tmp10.i.i to i64
  %tmp39.i5.i = getelementptr inbounds [27 x %char3], ptr addrspace(4) @global, i64 0, i64 %tmp38.i.i
  %tmp39.i.i = addrspacecast ptr addrspace(4) %tmp39.i5.i to ptr
  %tmp43.i.i = load i8, ptr %tmp39.i.i, align 1
  %tmp44.i.i = sext i8 %tmp43.i.i to i32
  %tmp45.i.i = add nsw i32 %tmp41.i.i, %tmp44.i.i
  %tmp50.i.i = getelementptr inbounds %char3, ptr %tmp39.i.i, i64 0, i32 1
  %tmp51.i.i = load i8, ptr %tmp50.i.i, align 1
  %tmp52.i.i = sext i8 %tmp51.i.i to i32
  %tmp53.i.i = add nsw i32 %tmp49.i.i, %tmp52.i.i
  %tmp56.i.i = getelementptr inbounds %char3, ptr %tmp39.i.i, i64 0, i32 2
  %tmp57.i.i = load i8, ptr %tmp56.i.i, align 1
  %tmp58.i.i = sext i8 %tmp57.i.i to i32
  %tmp59.i.i = add nsw i32 %tmp55.i.i, %tmp58.i.i
  %tmp60.i.i = tail call %int3 @hoge(i32 %tmp45.i.i, i32 %tmp53.i.i, i32 %tmp59.i.i) #1
  %tmp62.i.i = load i32, ptr %tmp61.i.i, align 4
  store i32 %tmp62.i.i, ptr %tmp64.i, align 8
  %tmp20 = load i64, ptr %tmp18, align 8
  %tmp22 = getelementptr inbounds i8, ptr %tmp, i64 %tmp20
  %tmp24 = getelementptr inbounds i8, ptr %tmp22, i64 80
  %tmp25 = load i32, ptr %tmp24, align 4
  %tmp36 = load ptr, ptr %arg, align 8
  %tmp37 = zext i32 %tmp25 to i64
  %tmp38 = getelementptr inbounds %float4, ptr %tmp36, i64 %tmp37
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 undef, ptr align 1 %tmp38, i64 undef, i1 false)
  %tmp40 = getelementptr inbounds i8, ptr %tmp22, i64 48
  %tmp41 = getelementptr inbounds i8, ptr %tmp40, i64 8
  %tmp42 = load float, ptr %tmp41, align 4
  %tmp44 = load float, ptr inttoptr (i64 8 to ptr), align 8
  %tmp45 = fsub contract float %tmp42, %tmp44
  %tmp46 = tail call %float4 @snork(float %tmp45)
  %tmp.i = tail call i64 @foo()
  %tmp10.i = load i64, ptr %tmp9.i, align 16
  %tmp11.i = add i64 %tmp10.i, %tmp.i
  store i64 %tmp11.i, ptr %tmp9.i, align 16, !tbaa !1
  %tmp43.i = add i64 %tmp11.i, %tmp42.i
  %tmp44.i = getelementptr inbounds i16, ptr %tmp5, i64 %tmp43.i
  %tmp45.i = load i16, ptr %tmp44.i, align 2
  %tmp47.i = icmp eq i16 %tmp45.i, -1
  %extract21 = lshr i16 %tmp45.i, 11
  %extract.t22 = trunc i16 %extract21 to i8
  br i1 %tmp47.i, label %bb14, label %bb49.i, !llvm.loop !12

bb14:                                             ; preds = %bb49.i.lr.ph, %bb49.i, %bb
  ret void
}

attributes #0 = { argmemonly mustprogress nofree nounwind willreturn }
attributes #1 = { nounwind }

!nvvm.annotations = !{!0}

!0 = !{ptr @barney, !"kernel", i32 1}
!1 = !{!2, !11, i64 64}
!2 = !{!"_ZTSN7cuneibs22neiblist_iterator_coreE", !3, i64 0, !3, i64 8, !6, i64 16, !8, i64 32, !9, i64 44, !10, i64 48, !11, i64 64, !9, i64 72, !4, i64 76, !9, i64 80}
!3 = !{!"any pointer", !4, i64 0}
!4 = !{!"omnipotent char", !5, i64 0}
!5 = !{!"Simple C++ TBAA"}
!6 = !{!"_ZTS6float4", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12}
!7 = !{!"float", !4, i64 0}
!8 = !{!"_ZTS4int3", !9, i64 0, !9, i64 4, !9, i64 8}
!9 = !{!"int", !4, i64 0}
!10 = !{!"_ZTS6float3", !7, i64 0, !7, i64 4, !7, i64 8}
!11 = !{!"long", !4, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.peeled.count", i32 1}