#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ strcmp(char *, char *);
int decode_flag(char *s) {
  if (!strcmp(s, "Z")) {
    return (4);
  } else if (!strcmp(s, "NZ")) {
    return (5);
  } else if (!strcmp(s, "C")) {
    return (6);
  } else if (!strcmp(s, "NC")) {
    return (7);
  } else {
    return (-1);
  }
}


x86 assembly (clang, -O0):
<decode_flag>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xeda(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1141 <decode_flag+0x31>
movl   $0x4,-0x4(%rbp)
jmp    11b7 <decode_flag+0xa7>
mov    -0x10(%rbp),%rdi
lea    0xeb4(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1166 <decode_flag+0x56>
movl   $0x5,-0x4(%rbp)
jmp    11b7 <decode_flag+0xa7>
mov    -0x10(%rbp),%rdi
lea    0xe93(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    118b <decode_flag+0x7b>
movl   $0x6,-0x4(%rbp)
jmp    11b7 <decode_flag+0xa7>
mov    -0x10(%rbp),%rdi
lea    0xe6d(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11b0 <decode_flag+0xa0>
movl   $0x7,-0x4(%rbp)
jmp    11b7 <decode_flag+0xa7>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<decode_flag>:
push   %rbx
mov    %rdi,%rbx
lea    0xee6(%rip),%rsi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1162 <decode_flag+0x52>
lea    0xed5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1169 <decode_flag+0x59>
lea    0xec6(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1170 <decode_flag+0x60>
lea    0xeb2(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
neg    %eax
sbb    %eax,%eax
or     $0x7,%eax
pop    %rbx
ret
mov    $0x4,%eax
pop    %rbx
ret
mov    $0x5,%eax
pop    %rbx
ret
mov    $0x6,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [2 x i8] c"Z\00"
@.str.1 = [3 x i8] c"NZ\00"
@.str.2 = [2 x i8] c"C\00"
@.str.3 = [3 x i8] c"NC\00"
define i32 @decode_flag(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i32 @strcmp(i8* %4, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%6 = icmp ne i32 %5, 0
br i1 %6, label %8, label %7
7: ; preds = %1
store i32 4, i32* %2
br label %24
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i32 @strcmp(i8* %9, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp ne i32 %10, 0
br i1 %11, label %13, label %12
12: ; preds = %8
store i32 5, i32* %2
br label %24
13: ; preds = %8
%14 = load i8*, i8** %3
%15 = call i32 @strcmp(i8* %14, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%16 = icmp ne i32 %15, 0
br i1 %16, label %18, label %17
17: ; preds = %13
store i32 6, i32* %2
br label %24
18: ; preds = %13
%19 = load i8*, i8** %3
%20 = call i32 @strcmp(i8* %19, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%21 = icmp ne i32 %20, 0
br i1 %21, label %23, label %22
22: ; preds = %18
store i32 7, i32* %2
br label %24
23: ; preds = %18
store i32 -1, i32* %2
br label %24
24: ; preds = %23, %22, %17, %12, %7
%25 = load i32, i32* %2
ret i32 %25
}

LLVM IR (-O2):
@.str = [2 x i8] c"Z\00"
@.str.1 = [3 x i8] c"NZ\00"
@.str.2 = [2 x i8] c"C\00"
@.str.3 = [3 x i8] c"NC\00"
define i32 @decode_flag(i8* nocapture %0) {
%2 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(2) getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32 %2, 0
br i1 %3, label %14, label %4
4: ; preds = %1
%5 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %14, label %7
7: ; preds = %4
%8 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(2) getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i32 %8, 0
br i1 %9, label %14, label %10
10: ; preds = %7
%11 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(3) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
%12 = icmp eq i32 %11, 0
%13 = select i1 %12, i32 7, i32 -1
br label %14
14: ; preds = %10, %7, %4, %1
%15 = phi i32 [ 4, %1 ], [ 5, %4 ], [ 6, %7 ], [ %13, %10 ]
ret i32 %15
}