; LLVM IR from Dovyski/opengl-demos :: libs/glm-0.9.9.3/test/gtx/gtx_fast_trigonometry.ll (ZN7taylor215perf_taylorCosAEffm)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"struct.glm::vec" = type { %union.anon }
%union.anon = type { %struct.anon }
%struct.anon = type { float, float, float, float }
%"class.std::vector.4" = type { %"struct.std::_Vector_base.5" }
%"struct.std::_Vector_base.5" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_ZN7taylor2L10AngleShiftE = external hidden global %"struct.glm::vec", align 4
@.str.21 = external hidden unnamed_addr constant [22 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind
declare i64 @clock() #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

declare i32 @printf(ptr noundef, ...) #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_ZN7taylor210taylorCosAEf(float noundef) #4

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN7taylor215perf_taylorCosAEffm(float noundef %0, float noundef %1, i64 noundef %2) #5 personality ptr @__gxx_personality_v0 {
  %4 = alloca float, align 4
  %5 = alloca float, align 4
  %6 = alloca i64, align 8
  %7 = alloca %"class.std::vector.4", align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca float, align 4
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  %13 = alloca i64, align 8
  %14 = alloca i32, align 4
  %15 = alloca i64, align 8
  store float %0, ptr %4, align 4, !tbaa !5
  store float %1, ptr %5, align 4, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %7) #6
  call void @_ZNSt6vectorIfSaIfEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #6
  %16 = load i64, ptr %6, align 8, !tbaa !9
  invoke void @_ZNSt6vectorIfSaIfEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %16)
          to label %17 unwind label %30

17:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #6
  %18 = load float, ptr %5, align 4, !tbaa !5
  %19 = load float, ptr %4, align 4, !tbaa !5
  %20 = fsub float %18, %19
  %21 = load i64, ptr %6, align 8, !tbaa !9
  %22 = uitofp i64 %21 to float
  %23 = fdiv float %20, %22
  store float %23, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #6
  %24 = call i64 @clock() #6
  store i64 %24, ptr %11, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #6
  store i64 0, ptr %12, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %45, %17
  %26 = load i64, ptr %12, align 8, !tbaa !9
  %27 = load i64, ptr %6, align 8, !tbaa !9
  %28 = icmp ult i64 %26, %27
  br i1 %28, label %34, label %29

29:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #6
  br label %48

30:                                               ; preds = %3
  %31 = landingpad { ptr, i32 }
          cleanup
  %32 = extractvalue { ptr, i32 } %31, 0
  store ptr %32, ptr %8, align 8
  %33 = extractvalue { ptr, i32 } %31, 1
  store i32 %33, ptr %9, align 4
  br label %86

34:                                               ; preds = %25
  %35 = load float, ptr @_ZN7taylor2L10AngleShiftE, align 4, !tbaa !11
  %36 = load float, ptr %4, align 4, !tbaa !5
  %37 = fadd float %35, %36
  %38 = load float, ptr %10, align 4, !tbaa !5
  %39 = load i64, ptr %12, align 8, !tbaa !9
  %40 = uitofp i64 %39 to float
  %41 = call float @llvm.fmuladd.f32(float %38, float %40, float %37)
  %42 = call noundef float @_ZN7taylor210taylorCosAEf(float noundef %41)
  %43 = load i64, ptr %12, align 8, !tbaa !9
  %44 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %43) #6
  store float %42, ptr %44, align 4, !tbaa !5
  br label %45

45:                                               ; preds = %34
  %46 = load i64, ptr %12, align 8, !tbaa !9
  %47 = add i64 %46, 1
  store i64 %47, ptr %12, align 8, !tbaa !9
  br label %25, !llvm.loop !12

48:                                               ; preds = %29
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #6
  %49 = call i64 @clock() #6
  store i64 %49, ptr %13, align 8, !tbaa !9
  %50 = load i64, ptr %13, align 8, !tbaa !9
  %51 = load i64, ptr %11, align 8, !tbaa !9
  %52 = sub nsw i64 %50, %51
  %53 = trunc i64 %52 to i32
  %54 = invoke i32 (ptr, ...) @printf(ptr noundef @.str.21, i32 noundef %53)
          to label %55 unwind label %61

55:                                               ; preds = %48
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #6
  store i32 0, ptr %14, align 4, !tbaa !14
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #6
  store i64 0, ptr %15, align 8, !tbaa !9
  br label %56

56:                                               ; preds = %81, %55
  %57 = load i64, ptr %15, align 8, !tbaa !9
  %58 = load i64, ptr %6, align 8, !tbaa !9
  %59 = icmp ult i64 %57, %58
  br i1 %59, label %65, label %60

60:                                               ; preds = %56
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #6
  br label %84

61:                                               ; preds = %48
  %62 = landingpad { ptr, i32 }
          cleanup
  %63 = extractvalue { ptr, i32 } %62, 0
  store ptr %63, ptr %8, align 8
  %64 = extractvalue { ptr, i32 } %62, 1
  store i32 %64, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #6
  br label %86

65:                                               ; preds = %56
  %66 = load i64, ptr %15, align 8, !tbaa !9
  %67 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %66) #6
  %68 = load float, ptr %67, align 4, !tbaa !5
  %69 = fcmp oge float %68, -1.000000e+00
  br i1 %69, label %70, label %75

70:                                               ; preds = %65
  %71 = load i64, ptr %15, align 8, !tbaa !9
  %72 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %7, i64 noundef %71) #6
  %73 = load float, ptr %72, align 4, !tbaa !5
  %74 = fcmp ole float %73, 1.000000e+00
  br label %75

75:                                               ; preds = %70, %65
  %76 = phi i1 [ false, %65 ], [ %74, %70 ]
  %77 = zext i1 %76 to i64
  %78 = select i1 %76, i32 0, i32 1
  %79 = load i32, ptr %14, align 4, !tbaa !14
  %80 = add nsw i32 %79, %78
  store i32 %80, ptr %14, align 4, !tbaa !14
  br label %81

81:                                               ; preds = %75
  %82 = load i64, ptr %15, align 8, !tbaa !9
  %83 = add i64 %82, 1
  store i64 %83, ptr %15, align 8, !tbaa !9
  br label %56, !llvm.loop !16

84:                                               ; preds = %60
  %85 = load i32, ptr %14, align 4, !tbaa !14
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #6
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #6
  call void @_ZNSt6vectorIfSaIfEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %7) #6
  ret i32 %85

86:                                               ; preds = %61, %30
  call void @_ZNSt6vectorIfSaIfEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %7) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr %7) #6
  br label %87

87:                                               ; preds = %86
  %88 = load ptr, ptr %8, align 8
  %89 = load i32, ptr %9, align 4
  %90 = insertvalue { ptr, i32 } poison, ptr %88, 0
  %91 = insertvalue { ptr, i32 } %90, i32 %89, 1
  resume { ptr, i32 } %91
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIfSaIfEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIfSaIfEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIfSaIfEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #4 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #5 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #6 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!15, !15, i64 0}
!15 = !{!"int", !7, i64 0}
!16 = distinct !{!16, !13}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"struct.glm::vec" = type { %union.anon }
%union.anon = type { %struct.anon }
%struct.anon = type { float, float, float, float }
%"class.std::vector.4" = type { %"struct.std::_Vector_base.5" }
%"struct.std::_Vector_base.5" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl" = type { %"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" }
%"struct.std::_Vector_base<float, std::allocator<float>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@_ZN7taylor2L10AngleShiftE = external hidden local_unnamed_addr global %"struct.glm::vec", align 4
@.str.21 = external hidden unnamed_addr constant [22 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind
declare i64 @clock() local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_ZN7taylor210taylorCosAEf(float noundef) local_unnamed_addr #4

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN7taylor215perf_taylorCosAEffm(float noundef %0, float noundef %1, i64 noundef %2) local_unnamed_addr #5 personality ptr @__gxx_personality_v0 {
  %4 = alloca %"class.std::vector.4", align 8
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #6
  call void @_ZNSt6vectorIfSaIfEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  invoke void @_ZNSt6vectorIfSaIfEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %2)
          to label %5 unwind label %14

5:                                                ; preds = %3
  %6 = fsub float %1, %0
  %7 = uitofp i64 %2 to float
  %8 = fdiv float %6, %7
  %9 = call i64 @clock() #6
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge29.critedge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph
  %10 = call i64 @clock() #6
  %11 = sub nsw i64 %10, %9
  %12 = trunc i64 %11 to i32
  %13 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.21, i32 noundef %12)
  br label %.lr.ph28

14:                                               ; preds = %3
  %15 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt6vectorIfSaIfEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #6
  resume { ptr, i32 } %15

.lr.ph:                                           ; preds = %5, %.lr.ph
  %.02224 = phi i64 [ %22, %.lr.ph ], [ 0, %5 ]
  %16 = load float, ptr @_ZN7taylor2L10AngleShiftE, align 4, !tbaa !5
  %17 = fadd float %16, %0
  %18 = uitofp i64 %.02224 to float
  %19 = call float @llvm.fmuladd.f32(float %8, float %18, float %17)
  %20 = call noundef float @_ZN7taylor210taylorCosAEf(float noundef %19)
  %21 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %.02224) #6
  store float %20, ptr %21, align 4, !tbaa !8
  %22 = add nuw i64 %.02224, 1
  %exitcond.not = icmp eq i64 %22, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

._crit_edge29.critedge:                           ; preds = %5
  %23 = call i64 @clock() #6
  %24 = sub nsw i64 %23, %9
  %25 = trunc i64 %24 to i32
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.21, i32 noundef %25)
  br label %._crit_edge29

._crit_edge29:                                    ; preds = %34, %._crit_edge29.critedge
  %.021.lcssa = phi i32 [ 0, %._crit_edge29.critedge ], [ %37, %34 ]
  call void @_ZNSt6vectorIfSaIfEED2Ev(ptr noundef nonnull align 8 dereferenceable(24) %4) #6
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #6
  ret i32 %.021.lcssa

.lr.ph28:                                         ; preds = %._crit_edge, %34
  %.026 = phi i64 [ %38, %34 ], [ 0, %._crit_edge ]
  %.02125 = phi i32 [ %37, %34 ], [ 0, %._crit_edge ]
  %27 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %.026) #6
  %28 = load float, ptr %27, align 4, !tbaa !8
  %29 = fcmp ult float %28, -1.000000e+00
  br i1 %29, label %34, label %30

30:                                               ; preds = %.lr.ph28
  %31 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %.026) #6
  %32 = load float, ptr %31, align 4, !tbaa !8
  %33 = fcmp ole float %32, 1.000000e+00
  br label %34

34:                                               ; preds = %30, %.lr.ph28
  %35 = phi i1 [ false, %.lr.ph28 ], [ %33, %30 ]
  %not. = xor i1 %35, true
  %36 = zext i1 %not. to i32
  %37 = add nuw nsw i32 %.02125, %36
  %38 = add nuw i64 %.026, 1
  %exitcond31.not = icmp eq i64 %38, %2
  br i1 %exitcond31.not, label %._crit_edge29, label %.lr.ph28, !llvm.loop !12
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIfSaIfEEC2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #4 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIfSaIfEE6resizeEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #5 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIfSaIfEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIfSaIfEED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #4 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #5 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #6 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"float", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass