#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 atoi(char *);
int /*<<< orphan*/ puts(char *);
int decide_value(char card_name[]) {
  int val;
  switch (card_name[0]) {
  case 'K':
  case 'Q':
  case 'J':
    val = 10;
    break;
  case 'A':
    val = 11;
    break;
  default:
    val = atoi(card_name);
    if ((val < 1) || (val > 10)) {
      puts("I don't understand that value");
    }
  }
  return val;
}


x86 assembly (clang, -O0):
<decide_value>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
movsbl (%rax),%eax
mov    %eax,-0x10(%rbp)
sub    $0x41,%eax
je     1175 <decide_value+0x55>
jmp    1144 <decide_value+0x24>
mov    -0x10(%rbp),%eax
add    $0xffffffb6,%eax
sub    $0x2,%eax
jb     1169 <decide_value+0x49>
jmp    1158 <decide_value+0x38>
mov    -0x10(%rbp),%eax
sub    $0x51,%eax
jne    1181 <decide_value+0x61>
jmp    1169 <decide_value+0x49>
movl   $0xa,-0xc(%rbp)
jmp    11b2 <decide_value+0x92>
movl   $0xb,-0xc(%rbp)
jmp    11b2 <decide_value+0x92>
mov    -0x8(%rbp),%rdi
call   1040 <atoi@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x1,-0xc(%rbp)
jl     11a1 <decide_value+0x81>
cmpl   $0xa,-0xc(%rbp)
jle    11ad <decide_value+0x8d>
lea    0xe58(%rip),%rdi
call   1030 <puts@plt>
jmp    11b2 <decide_value+0x92>
mov    -0xc(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<decide_value>:
push   %rbx
movsbl (%rdi),%eax
mov    $0xa,%ebx
lea    -0x4a(%rax),%ecx
cmp    $0x2,%ecx
jb     115d <decide_value+0x3d>
cmp    $0x51,%eax
je     115d <decide_value+0x3d>
cmp    $0x41,%eax
jne    1142 <decide_value+0x22>
mov    $0xb,%ebx
jmp    115d <decide_value+0x3d>
call   1040 <atoi@plt>
mov    %eax,%ebx
add    $0xfffffff5,%eax
cmp    $0xfffffff5,%eax
ja     115d <decide_value+0x3d>
lea    0xea8(%rip),%rdi
call   1030 <puts@plt>
mov    %ebx,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [30 x i8] c"I don't understand that value\00"
define i32 @decide_value(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = getelementptr inbounds i8, i8* %4, i64 0
%6 = load i8, i8* %5
%7 = sext i8 %6 to i32
switch i32 %7, label %10 [
i32 75, label %8
i32 81, label %8
i32 74, label %8
i32 65, label %9
]
8: ; preds = %1, %1, %1
store i32 10, i32* %3
br label %21
9: ; preds = %1
store i32 11, i32* %3
br label %21
10: ; preds = %1
%11 = load i8*, i8** %2
%12 = call i32 @atoi(i8* %11)
store i32 %12, i32* %3
%13 = load i32, i32* %3
%14 = icmp slt i32 %13, 1
br i1 %14, label %18, label %15
15: ; preds = %10
%16 = load i32, i32* %3
%17 = icmp sgt i32 %16, 10
br i1 %17, label %18, label %20
18: ; preds = %15, %10
%19 = call i32 @puts(i8* getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0))
br label %20
20: ; preds = %18, %15
br label %21
21: ; preds = %20, %9, %8
%22 = load i32, i32* %3
ret i32 %22
}

LLVM IR (-O2):
@.str = [30 x i8] c"I don't understand that value\00"
define i32 @decide_value(i8* nocapture %0) {
%2 = load i8, i8* %0
%3 = sext i8 %2 to i32
switch i32 %3, label %5 [
i32 75, label %11
i32 81, label %11
i32 74, label %11
i32 65, label %4
]
4: ; preds = %1
br label %11
5: ; preds = %1
%6 = tail call i32 @atoi(i8* %0)
%7 = add i32 %6, -11
%8 = icmp ult i32 %7, -10
br i1 %8, label %9, label %11
9: ; preds = %5
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @.str, i64 0, i64 0))
br label %11
11: ; preds = %1, %1, %1, %9, %5, %4
%12 = phi i32 [ %6, %9 ], [ %6, %5 ], [ 11, %4 ], [ 10, %1 ], [ 10, %1 ], [ 10, %1 ]
ret i32 %12
}