const char *SHPTypeName(int nSHPType) {
  switch (nSHPType) {
  case 0:
    return "NullShape";
  case 1:
    return "Point";
  case 3:
    return "Arc";
  case 5:
    return "Polygon";
  case 8:
    return "MultiPoint";
  case 11:
    return "PointZ";
  case 13:
    return "ArcZ";
  case 15:
    return "PolygonZ";
  case 18:
    return "MultiPointZ";
  case 21:
    return "PointM";
  case 23:
    return "ArcM";
  case 25:
    return "PolygonM";
  case 28:
    return "MultiPointM";
  case 31:
    return "MultiPatch";
  default:
    return "UnknownShapeType";
  }
}


x86 assembly (clang, -O0):
<SHPTypeName>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x1f,%rax
ja     120c <SHPTypeName+0x10c>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf4d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf58(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf37(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf2b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf23(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf31(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf0e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf03(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xefc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xf0b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xee8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xedd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xed6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xed2(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1217 <SHPTypeName+0x117>
lea    0xecd(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<SHPTypeName>:
cmp    $0x1f,%edi
ja     1117 <SHPTypeName+0x17>
movslq %edi,%rax
lea    0xf65(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf42(%rip),%rax
ret

LLVM IR (-O0):
@.str = [10 x i8] c"NullShape\00"
@.str.1 = [6 x i8] c"Point\00"
@.str.2 = [4 x i8] c"Arc\00"
@.str.3 = [8 x i8] c"Polygon\00"
@.str.4 = [11 x i8] c"MultiPoint\00"
@.str.5 = [7 x i8] c"PointZ\00"
@.str.6 = [5 x i8] c"ArcZ\00"
@.str.7 = [9 x i8] c"PolygonZ\00"
@.str.8 = [12 x i8] c"MultiPointZ\00"
@.str.9 = [7 x i8] c"PointM\00"
@.str.10 = [5 x i8] c"ArcM\00"
@.str.11 = [9 x i8] c"PolygonM\00"
@.str.12 = [12 x i8] c"MultiPointM\00"
@.str.13 = [11 x i8] c"MultiPatch\00"
@.str.14 = [17 x i8] c"UnknownShapeType\00"
define i8* @SHPTypeName(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %19 [
i32 0, label %5
i32 1, label %6
i32 3, label %7
i32 5, label %8
i32 8, label %9
i32 11, label %10
i32 13, label %11
i32 15, label %12
i32 18, label %13
i32 21, label %14
i32 23, label %15
i32 25, label %16
i32 28, label %17
i32 31, label %18
]
5: ; preds = %1
store i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0), i8** %2
br label %20
6: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %20
7: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %20
8: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %20
9: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %20
10: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %20
11: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %20
12: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %20
13: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %20
14: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %20
15: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %20
16: ; preds = %1
store i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %20
17: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %20
18: ; preds = %1
store i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %20
19: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %20
20: ; preds = %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%21 = load i8*, i8** %2
ret i8* %21
}

LLVM IR (-O2):
@.str = [10 x i8] c"NullShape\00"
@.str.1 = [6 x i8] c"Point\00"
@.str.2 = [4 x i8] c"Arc\00"
@.str.3 = [8 x i8] c"Polygon\00"
@.str.4 = [11 x i8] c"MultiPoint\00"
@.str.5 = [7 x i8] c"PointZ\00"
@.str.6 = [5 x i8] c"ArcZ\00"
@.str.7 = [9 x i8] c"PolygonZ\00"
@.str.8 = [12 x i8] c"MultiPointZ\00"
@.str.9 = [7 x i8] c"PointM\00"
@.str.10 = [5 x i8] c"ArcM\00"
@.str.11 = [9 x i8] c"PolygonM\00"
@.str.12 = [12 x i8] c"MultiPointM\00"
@.str.13 = [11 x i8] c"MultiPatch\00"
@.str.14 = [17 x i8] c"UnknownShapeType\00"
@reltable.SHPTypeName = [32 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @.str to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.1 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.2 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.3 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.4 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.5 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.6 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.7 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.8 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.9 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.10 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @.str.11 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.12 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.14 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([11 x i8]* @.str.13 to i64), i64 ptrtoint ([32 x i32]* @reltable.SHPTypeName to i64)) to i32)]
define i8* @SHPTypeName(i32 %0) {
%2 = icmp ult i32 %0, 32
br i1 %2, label %3, label %7
3: ; preds = %1
%4 = sext i32 %0 to i64
%5 = shl i64 %4, 2
%6 = call i8* @llvm.load.relative.i64(i8* bitcast ([32 x i32]* @reltable.SHPTypeName to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([17 x i8], [17 x i8]* @.str.14, i64 0, i64 0), %1 ]
ret i8* %8
}