; LLVM IR from ejoy/ejoy2d :: lua (lcode)

; 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.expdesc = type { i32, %union.anon.1, i32, i32 }
%union.anon.1 = type { double }
%struct.FuncState = type { ptr, ptr, ptr, ptr, i32, i32, i32, i32, i32, i32, i16, i8, i8, i8 }
%struct.Proto = type { ptr, i8, i8, i8, i8, i8, i32, i32, i32, i32, i32, i32, i32, i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
declare hidden void @luaK_concat(ptr noundef, ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare hidden void @luaK_dischargevars(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden void @luaK_exp2nextreg(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden void @freeexp(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden void @luaK_exp2val(ptr noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden void @codeexpval(ptr noundef, i32 noundef, ptr noundef, ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
define hidden void @luaK_posfix(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3, i32 noundef %4) #0 {
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !5
  store i32 %4, ptr %10, align 4, !tbaa !9
  %11 = load i32, ptr %7, align 4, !tbaa !9
  switch i32 %11, label %124 [
    i32 19, label %12
    i32 20, label %23
    i32 12, label %34
    i32 0, label %102
    i32 1, label %102
    i32 2, label %102
    i32 5, label %102
    i32 6, label %102
    i32 3, label %102
    i32 4, label %102
    i32 7, label %102
    i32 8, label %102
    i32 9, label %102
    i32 10, label %102
    i32 11, label %102
    i32 13, label %110
    i32 14, label %110
    i32 15, label %110
    i32 16, label %117
    i32 17, label %117
    i32 18, label %117
  ]

12:                                               ; preds = %5
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = load ptr, ptr %9, align 8, !tbaa !5
  call void @luaK_dischargevars(ptr noundef %13, ptr noundef %14)
  %15 = load ptr, ptr %6, align 8, !tbaa !5
  %16 = load ptr, ptr %9, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.expdesc, ptr %16, i32 0, i32 3
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.expdesc, ptr %18, i32 0, i32 3
  %20 = load i32, ptr %19, align 4, !tbaa !11
  call void @luaK_concat(ptr noundef %15, ptr noundef %17, i32 noundef %20)
  %21 = load ptr, ptr %8, align 8, !tbaa !5
  %22 = load ptr, ptr %9, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %21, ptr align 8 %22, i64 24, i1 false), !tbaa.struct !13
  br label %125

23:                                               ; preds = %5
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = load ptr, ptr %9, align 8, !tbaa !5
  call void @luaK_dischargevars(ptr noundef %24, ptr noundef %25)
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  %27 = load ptr, ptr %9, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.expdesc, ptr %27, i32 0, i32 2
  %29 = load ptr, ptr %8, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.expdesc, ptr %29, i32 0, i32 2
  %31 = load i32, ptr %30, align 8, !tbaa !15
  call void @luaK_concat(ptr noundef %26, ptr noundef %28, i32 noundef %31)
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = load ptr, ptr %9, align 8, !tbaa !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %32, ptr align 8 %33, i64 24, i1 false), !tbaa.struct !13
  br label %125

34:                                               ; preds = %5
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = load ptr, ptr %9, align 8, !tbaa !5
  call void @luaK_exp2val(ptr noundef %35, ptr noundef %36)
  %37 = load ptr, ptr %9, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.expdesc, ptr %37, i32 0, i32 0
  %39 = load i32, ptr %38, align 8, !tbaa !16
  %40 = icmp eq i32 %39, 12
  br i1 %40, label %41, label %94

41:                                               ; preds = %34
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.FuncState, ptr %42, i32 0, i32 0
  %44 = load ptr, ptr %43, align 8, !tbaa !17
  %45 = getelementptr inbounds %struct.Proto, ptr %44, i32 0, i32 15
  %46 = load ptr, ptr %45, align 8, !tbaa !20
  %47 = load ptr, ptr %9, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.expdesc, ptr %47, i32 0, i32 1
  %49 = load i32, ptr %48, align 8, !tbaa !14
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i32, ptr %46, i64 %50
  %52 = load i32, ptr %51, align 4, !tbaa !9
  %53 = lshr i32 %52, 0
  %54 = and i32 %53, 63
  %55 = icmp eq i32 %54, 29
  br i1 %55, label %56, label %94

56:                                               ; preds = %41
  %57 = load ptr, ptr %6, align 8, !tbaa !5
  %58 = load ptr, ptr %8, align 8, !tbaa !5
  call void @freeexp(ptr noundef %57, ptr noundef %58)
  %59 = load ptr, ptr %6, align 8, !tbaa !5
  %60 = getelementptr inbounds %struct.FuncState, ptr %59, i32 0, i32 0
  %61 = load ptr, ptr %60, align 8, !tbaa !17
  %62 = getelementptr inbounds %struct.Proto, ptr %61, i32 0, i32 15
  %63 = load ptr, ptr %62, align 8, !tbaa !20
  %64 = load ptr, ptr %9, align 8, !tbaa !5
  %65 = getelementptr inbounds %struct.expdesc, ptr %64, i32 0, i32 1
  %66 = load i32, ptr %65, align 8, !tbaa !14
  %67 = sext i32 %66 to i64
  %68 = getelementptr inbounds i32, ptr %63, i64 %67
  %69 = load i32, ptr %68, align 4, !tbaa !9
  %70 = and i32 %69, 8388607
  %71 = load ptr, ptr %8, align 8, !tbaa !5
  %72 = getelementptr inbounds %struct.expdesc, ptr %71, i32 0, i32 1
  %73 = load i32, ptr %72, align 8, !tbaa !14
  %74 = shl i32 %73, 23
  %75 = and i32 %74, -8388608
  %76 = or i32 %70, %75
  %77 = load ptr, ptr %6, align 8, !tbaa !5
  %78 = getelementptr inbounds %struct.FuncState, ptr %77, i32 0, i32 0
  %79 = load ptr, ptr %78, align 8, !tbaa !17
  %80 = getelementptr inbounds %struct.Proto, ptr %79, i32 0, i32 15
  %81 = load ptr, ptr %80, align 8, !tbaa !20
  %82 = load ptr, ptr %9, align 8, !tbaa !5
  %83 = getelementptr inbounds %struct.expdesc, ptr %82, i32 0, i32 1
  %84 = load i32, ptr %83, align 8, !tbaa !14
  %85 = sext i32 %84 to i64
  %86 = getelementptr inbounds i32, ptr %81, i64 %85
  store i32 %76, ptr %86, align 4, !tbaa !9
  %87 = load ptr, ptr %8, align 8, !tbaa !5
  %88 = getelementptr inbounds %struct.expdesc, ptr %87, i32 0, i32 0
  store i32 12, ptr %88, align 8, !tbaa !16
  %89 = load ptr, ptr %9, align 8, !tbaa !5
  %90 = getelementptr inbounds %struct.expdesc, ptr %89, i32 0, i32 1
  %91 = load i32, ptr %90, align 8, !tbaa !14
  %92 = load ptr, ptr %8, align 8, !tbaa !5
  %93 = getelementptr inbounds %struct.expdesc, ptr %92, i32 0, i32 1
  store i32 %91, ptr %93, align 8, !tbaa !14
  br label %101

94:                                               ; preds = %41, %34
  %95 = load ptr, ptr %6, align 8, !tbaa !5
  %96 = load ptr, ptr %9, align 8, !tbaa !5
  call void @luaK_exp2nextreg(ptr noundef %95, ptr noundef %96)
  %97 = load ptr, ptr %6, align 8, !tbaa !5
  %98 = load ptr, ptr %8, align 8, !tbaa !5
  %99 = load ptr, ptr %9, align 8, !tbaa !5
  %100 = load i32, ptr %10, align 4, !tbaa !9
  call void @codeexpval(ptr noundef %97, i32 noundef 29, ptr noundef %98, ptr noundef %99, i32 noundef %100)
  br label %101

101:                                              ; preds = %94, %56
  br label %125

102:                                              ; preds = %5, %5, %5, %5, %5, %5, %5, %5, %5, %5, %5, %5
  %103 = load ptr, ptr %6, align 8, !tbaa !5
  %104 = load i32, ptr %7, align 4, !tbaa !9
  %105 = sub i32 %104, 0
  %106 = add i32 %105, 13
  %107 = load ptr, ptr %8, align 8, !tbaa !5
  %108 = load ptr, ptr %9, align 8, !tbaa !5
  %109 = load i32, ptr %10, align 4, !tbaa !9
  call void @codeexpval(ptr noundef %103, i32 noundef %106, ptr noundef %107, ptr noundef %108, i32 noundef %109)
  br label %125

110:                                              ; preds = %5, %5, %5
  %111 = load ptr, ptr %6, align 8, !tbaa !5
  %112 = load i32, ptr %7, align 4, !tbaa !9
  %113 = sub i32 %112, 13
  %114 = add i32 %113, 31
  %115 = load ptr, ptr %8, align 8, !tbaa !5
  %116 = load ptr, ptr %9, align 8, !tbaa !5
  call void @codecomp(ptr noundef %111, i32 noundef %114, i32 noundef 1, ptr noundef %115, ptr noundef %116)
  br label %125

117:                                              ; preds = %5, %5, %5
  %118 = load ptr, ptr %6, align 8, !tbaa !5
  %119 = load i32, ptr %7, align 4, !tbaa !9
  %120 = sub i32 %119, 16
  %121 = add i32 %120, 31
  %122 = load ptr, ptr %8, align 8, !tbaa !5
  %123 = load ptr, ptr %9, align 8, !tbaa !5
  call void @codecomp(ptr noundef %118, i32 noundef %121, i32 noundef 0, ptr noundef %122, ptr noundef %123)
  br label %125

124:                                              ; preds = %5
  br label %125

125:                                              ; preds = %124, %117, %110, %102, %101, %23, %12
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
declare hidden void @codecomp(ptr noundef, i32 noundef, i32 noundef, ptr noundef, ptr noundef) #0

attributes #0 = { 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 #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 20}
!12 = !{!"expdesc", !10, i64 0, !7, i64 8, !10, i64 16, !10, i64 20}
!13 = !{i64 0, i64 4, !9, i64 8, i64 8, !14, i64 16, i64 4, !9, i64 20, i64 4, !9}
!14 = !{!7, !7, i64 0}
!15 = !{!12, !10, i64 16}
!16 = !{!12, !10, i64 0}
!17 = !{!18, !6, i64 0}
!18 = !{!"FuncState", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !10, i64 32, !10, i64 36, !10, i64 40, !10, i64 44, !10, i64 48, !10, i64 52, !19, i64 56, !7, i64 58, !7, i64 59, !7, i64 60}
!19 = !{!"short", !7, i64 0}
!20 = !{!21, !6, i64 56}
!21 = !{!"Proto", !6, i64 0, !7, i64 8, !7, i64 9, !7, i64 10, !7, i64 11, !7, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !10, i64 28, !10, i64 32, !10, i64 36, !10, i64 40, !10, i64 44, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96, !6, i64 104, !6, i64 112}


; 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"

; Function Attrs: nounwind uwtable
declare hidden void @luaK_concat(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @luaK_dischargevars(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @luaK_exp2nextreg(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @freeexp(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @luaK_exp2val(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden void @codeexpval(ptr noundef, i32 noundef, ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define hidden void @luaK_posfix(ptr noundef %0, i32 noundef %1, ptr noundef %2, ptr noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  switch i32 %1, label %49 [
    i32 19, label %6
    i32 20, label %10
    i32 12, label %14
    i32 0, label %43
    i32 1, label %43
    i32 2, label %43
    i32 5, label %43
    i32 6, label %43
    i32 3, label %43
    i32 4, label %43
    i32 7, label %43
    i32 8, label %43
    i32 9, label %43
    i32 10, label %43
    i32 11, label %43
    i32 13, label %45
    i32 14, label %45
    i32 15, label %45
    i32 16, label %47
    i32 17, label %47
    i32 18, label %47
  ]

6:                                                ; preds = %5
  tail call void @luaK_dischargevars(ptr noundef %0, ptr noundef %3)
  %7 = getelementptr inbounds i8, ptr %3, i64 20
  %8 = getelementptr inbounds i8, ptr %2, i64 20
  %9 = load i32, ptr %8, align 4, !tbaa !5
  tail call void @luaK_concat(ptr noundef %0, ptr noundef nonnull %7, i32 noundef %9)
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i64 24, i1 false), !tbaa.struct !10
  br label %49

10:                                               ; preds = %5
  tail call void @luaK_dischargevars(ptr noundef %0, ptr noundef %3)
  %11 = getelementptr inbounds i8, ptr %3, i64 16
  %12 = getelementptr inbounds i8, ptr %2, i64 16
  %13 = load i32, ptr %12, align 8, !tbaa !13
  tail call void @luaK_concat(ptr noundef %0, ptr noundef nonnull %11, i32 noundef %13)
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(24) %2, ptr noundef nonnull align 8 dereferenceable(24) %3, i64 24, i1 false), !tbaa.struct !10
  br label %49

14:                                               ; preds = %5
  tail call void @luaK_exp2val(ptr noundef %0, ptr noundef %3)
  %15 = load i32, ptr %3, align 8, !tbaa !14
  %16 = icmp eq i32 %15, 12
  br i1 %16, label %17, label %42

17:                                               ; preds = %14
  %18 = load ptr, ptr %0, align 8, !tbaa !15
  %19 = getelementptr inbounds i8, ptr %18, i64 56
  %20 = load ptr, ptr %19, align 8, !tbaa !19
  %21 = getelementptr inbounds i8, ptr %3, i64 8
  %22 = load i32, ptr %21, align 8, !tbaa !12
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %20, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !11
  %26 = and i32 %25, 63
  %27 = icmp eq i32 %26, 29
  br i1 %27, label %28, label %42

28:                                               ; preds = %17
  tail call void @freeexp(ptr noundef nonnull %0, ptr noundef %2)
  %29 = load ptr, ptr %0, align 8, !tbaa !15
  %30 = getelementptr inbounds i8, ptr %29, i64 56
  %31 = load ptr, ptr %30, align 8, !tbaa !19
  %32 = load i32, ptr %21, align 8, !tbaa !12
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds i32, ptr %31, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !11
  %36 = and i32 %35, 8388607
  %37 = getelementptr inbounds i8, ptr %2, i64 8
  %38 = load i32, ptr %37, align 8, !tbaa !12
  %39 = shl i32 %38, 23
  %40 = or disjoint i32 %39, %36
  store i32 %40, ptr %34, align 4, !tbaa !11
  store i32 12, ptr %2, align 8, !tbaa !14
  %41 = load i32, ptr %21, align 8, !tbaa !12
  store i32 %41, ptr %37, align 8, !tbaa !12
  br label %49

42:                                               ; preds = %17, %14
  tail call void @luaK_exp2nextreg(ptr noundef %0, ptr noundef nonnull %3)
  tail call void @codeexpval(ptr noundef %0, i32 noundef 29, ptr noundef %2, ptr noundef nonnull %3, i32 noundef %4)
  br label %49

43:                                               ; preds = %5, %5, %5, %5, %5, %5, %5, %5, %5, %5, %5, %5
  %44 = add nuw nsw i32 %1, 13
  tail call void @codeexpval(ptr noundef %0, i32 noundef %44, ptr noundef %2, ptr noundef %3, i32 noundef %4)
  br label %49

45:                                               ; preds = %5, %5, %5
  %46 = add nuw nsw i32 %1, 18
  tail call void @codecomp(ptr noundef %0, i32 noundef %46, i32 noundef 1, ptr noundef %2, ptr noundef %3)
  br label %49

47:                                               ; preds = %5, %5, %5
  %48 = add nuw nsw i32 %1, 15
  tail call void @codecomp(ptr noundef %0, i32 noundef %48, i32 noundef 0, ptr noundef %2, ptr noundef %3)
  br label %49

49:                                               ; preds = %5, %28, %42, %47, %45, %43, %10, %6
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
declare hidden void @codecomp(ptr noundef, i32 noundef, i32 noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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, !7, i64 20}
!6 = !{!"expdesc", !7, i64 0, !8, i64 8, !7, i64 16, !7, i64 20}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{i64 0, i64 4, !11, i64 8, i64 8, !12, i64 16, i64 4, !11, i64 20, i64 4, !11}
!11 = !{!7, !7, i64 0}
!12 = !{!8, !8, i64 0}
!13 = !{!6, !7, i64 16}
!14 = !{!6, !7, i64 0}
!15 = !{!16, !17, i64 0}
!16 = !{!"FuncState", !17, i64 0, !17, i64 8, !17, i64 16, !17, i64 24, !7, i64 32, !7, i64 36, !7, i64 40, !7, i64 44, !7, i64 48, !7, i64 52, !18, i64 56, !8, i64 58, !8, i64 59, !8, i64 60}
!17 = !{!"any pointer", !8, i64 0}
!18 = !{!"short", !8, i64 0}
!19 = !{!20, !17, i64 56}
!20 = !{!"Proto", !17, i64 0, !8, i64 8, !8, i64 9, !8, i64 10, !8, i64 11, !8, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !7, i64 28, !7, i64 32, !7, i64 36, !7, i64 40, !7, i64 44, !17, i64 48, !17, i64 56, !17, i64 64, !17, i64 72, !17, i64 80, !17, i64 88, !17, i64 96, !17, i64 104, !17, i64 112}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass