const char *newuoa_reason(int status) {
  switch (status) {
  case (1):
    return "caller is requested to evaluate the objective function";
  case (0):
    return "algorithm converged";
  case (-1):
    return "NPT is not in the required interval";
  case (-2):
    return "too much cancellation in a denominator";
  case (-3):
    return "maximum number of function evaluations exceeded";
  case (-4):
    return "trust region step has failed to reduce quadratic approximation";
  case (-5):
    return "illegal NULL address";
  case (-6):
    return "corrupted or misused workspace";
  default:
    return "unknown status";
  }
}


x86 assembly (clang, -O0):
<newuoa_reason>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0x6,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x7,%eax
ja     11b0 <newuoa_reason+0xb0>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf10(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf14(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf28(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf3f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf5f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf8e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xf93(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    11bb <newuoa_reason+0xbb>
lea    0xfa2(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<newuoa_reason>:
add    $0x6,%edi
cmp    $0x7,%edi
ja     111a <newuoa_reason+0x1a>
movslq %edi,%rax
lea    0x1036(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0x1018(%rip),%rax
ret

LLVM IR (-O0):
@.str = [55 x i8] c"caller is requested to evaluate the objective function\00"
@.str.1 = [20 x i8] c"algorithm converged\00"
@.str.2 = [36 x i8] c"NPT is not in the required interval\00"
@.str.3 = [39 x i8] c"too much cancellation in a denominator\00"
@.str.4 = [48 x i8] c"maximum number of function evaluations exceeded\00"
@.str.5 = [63 x i8] c"trust region step has failed to reduce quadratic approximation\00"
@.str.6 = [21 x i8] c"illegal NULL address\00"
@.str.7 = [31 x i8] c"corrupted or misused workspace\00"
@.str.8 = [15 x i8] c"unknown status\00"
define i8* @newuoa_reason(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %13 [
i32 1, label %5
i32 0, label %6
i32 -1, label %7
i32 -2, label %8
i32 -3, label %9
i32 -4, label %10
i32 -5, label %11
i32 -6, label %12
]
5: ; preds = %1
store i8* getelementptr inbounds ([55 x i8], [55 x i8]* @.str, i64 0, i64 0), i8** %2
br label %14
6: ; preds = %1
store i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %14
7: ; preds = %1
store i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %14
8: ; preds = %1
store i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %14
9: ; preds = %1
store i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %14
10: ; preds = %1
store i8* getelementptr inbounds ([63 x i8], [63 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %14
11: ; preds = %1
store i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %14
12: ; preds = %1
store i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %14
13: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %14
14: ; preds = %13, %12, %11, %10, %9, %8, %7, %6, %5
%15 = load i8*, i8** %2
ret i8* %15
}

LLVM IR (-O2):
@.str = [55 x i8] c"caller is requested to evaluate the objective function\00"
@.str.1 = [20 x i8] c"algorithm converged\00"
@.str.2 = [36 x i8] c"NPT is not in the required interval\00"
@.str.3 = [39 x i8] c"too much cancellation in a denominator\00"
@.str.4 = [48 x i8] c"maximum number of function evaluations exceeded\00"
@.str.5 = [63 x i8] c"trust region step has failed to reduce quadratic approximation\00"
@.str.6 = [21 x i8] c"illegal NULL address\00"
@.str.7 = [31 x i8] c"corrupted or misused workspace\00"
@.str.8 = [15 x i8] c"unknown status\00"
@reltable.newuoa_reason = [8 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([31 x i8]* @.str.7 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([21 x i8]* @.str.6 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([63 x i8]* @.str.5 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([48 x i8]* @.str.4 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([39 x i8]* @.str.3 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([36 x i8]* @.str.2 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([20 x i8]* @.str.1 to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([55 x i8]* @.str to i64), i64 ptrtoint ([8 x i32]* @reltable.newuoa_reason to i64)) to i32)]
define i8* @newuoa_reason(i32 %0) {
%2 = add i32 %0, 6
%3 = icmp ult i32 %2, 8
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 ([8 x i32]* @reltable.newuoa_reason to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([15 x i8], [15 x i8]* @.str.8, i64 0, i64 0), %1 ]
ret i8* %9
}