char *HAS_SUBNORM_meaning(int has_subnorm) {
  switch (has_subnorm) {
  case -1:
    return "indeterminable";
  case 0:
    return "absent";
  case 1:
    return "present";
  default:
    return "implementation-defined";
  }
}


x86 assembly (clang, -O0):
<HAS_SUBNORM_meaning>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
sub    $0xffffffff,%eax
je     113c <HAS_SUBNORM_meaning+0x3c>
jmp    111b <HAS_SUBNORM_meaning+0x1b>
mov    -0x10(%rbp),%eax
test   %eax,%eax
je     114c <HAS_SUBNORM_meaning+0x4c>
jmp    112b <HAS_SUBNORM_meaning+0x2b>
mov    -0x10(%rbp),%eax
sub    $0x1,%eax
je     115c <HAS_SUBNORM_meaning+0x5c>
jmp    116c <HAS_SUBNORM_meaning+0x6c>
lea    0xebd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <HAS_SUBNORM_meaning+0x77>
lea    0xebc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <HAS_SUBNORM_meaning+0x77>
lea    0xeb3(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <HAS_SUBNORM_meaning+0x77>
lea    0xeab(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<HAS_SUBNORM_meaning>:
add    $0x1,%edi
cmp    $0x2,%edi
ja     111a <HAS_SUBNORM_meaning+0x1a>
movslq %edi,%rax
lea    0xf26(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xefd(%rip),%rax
ret

LLVM IR (-O0):
@.str = [15 x i8] c"indeterminable\00"
@.str.1 = [7 x i8] c"absent\00"
@.str.2 = [8 x i8] c"present\00"
@.str.3 = [23 x i8] c"implementation-defined\00"
define i8* @HAS_SUBNORM_meaning(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %8 [
i32 -1, label %5
i32 0, label %6
i32 1, label %7
]
5: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0), i8** %2
br label %9
6: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %9
7: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %9
8: ; preds = %1
store i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %9
9: ; preds = %8, %7, %6, %5
%10 = load i8*, i8** %2
ret i8* %10
}

LLVM IR (-O2):
@.str = [15 x i8] c"indeterminable\00"
@.str.1 = [7 x i8] c"absent\00"
@.str.2 = [8 x i8] c"present\00"
@.str.3 = [23 x i8] c"implementation-defined\00"
@reltable.HAS_SUBNORM_meaning = [3 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str to i64), i64 ptrtoint ([3 x i32]* @reltable.HAS_SUBNORM_meaning to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.1 to i64), i64 ptrtoint ([3 x i32]* @reltable.HAS_SUBNORM_meaning to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @.str.2 to i64), i64 ptrtoint ([3 x i32]* @reltable.HAS_SUBNORM_meaning to i64)) to i32)]
define i8* @HAS_SUBNORM_meaning(i32 %0) {
%2 = add i32 %0, 1
%3 = icmp ult i32 %2, 3
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([3 x i32]* @reltable.HAS_SUBNORM_meaning to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @.str.3, i64 0, i64 0), %1 ]
ret i8* %9
}