#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 strlen(char *);
int contains_char(char *str, char search) {
  int i;
  for (i = 0; i < strlen(str); i++) {
    if (str[i] == search)
      return 1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<contains_char>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %sil,%al
mov    %rdi,-0x10(%rbp)
mov    %al,-0x11(%rbp)
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
mov    -0x1c(%rbp),%eax
cmp    %ecx,%eax
jge    117c <contains_char+0x6c>
mov    -0x10(%rbp),%rax
movslq -0x18(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
movsbl -0x11(%rbp),%ecx
cmp    %ecx,%eax
jne    1169 <contains_char+0x59>
movl   $0x1,-0x4(%rbp)
jmp    1183 <contains_char+0x73>
jmp    116e <contains_char+0x5e>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    1129 <contains_char+0x19>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<contains_char>:
push   %rbp
push   %r14
push   %rbx
mov    %esi,%r14d
mov    %rdi,%rbx
call   1030 <strlen@plt>
test   %eax,%eax
jle    1149 <contains_char+0x39>
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
nop
cmp    %r14b,(%rbx,%rbp,1)
je     114d <contains_char+0x3d>
add    $0x1,%rbp
mov    %rbx,%rdi
call   1030 <strlen@plt>
cltq
cmp    %rax,%rbp
jl     1130 <contains_char+0x20>
xor    %eax,%eax
jmp    1152 <contains_char+0x42>
mov    $0x1,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define i32 @contains_char(i8* %0, i8 signext %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca i8
%6 = alloca i32
store i8* %0, i8** %4
store i8 %1, i8* %5
store i32 0, i32* %6
br label %7
7: ; preds = %24, %2
%8 = load i32, i32* %6
%9 = load i8*, i8** %4
%10 = call i32 @strlen(i8* %9)
%11 = icmp slt i32 %8, %10
br i1 %11, label %12, label %27
12: ; preds = %7
%13 = load i8*, i8** %4
%14 = load i32, i32* %6
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds i8, i8* %13, i64 %15
%17 = load i8, i8* %16
%18 = sext i8 %17 to i32
%19 = load i8, i8* %5
%20 = sext i8 %19 to i32
%21 = icmp eq i32 %18, %20
br i1 %21, label %22, label %23
22: ; preds = %12
store i32 1, i32* %3
br label %28
23: ; preds = %12
br label %24
24: ; preds = %23
%25 = load i32, i32* %6
%26 = add nsw i32 %25, 1
store i32 %26, i32* %6
br label %7
27: ; preds = %7
store i32 0, i32* %3
br label %28
28: ; preds = %27, %22
%29 = load i32, i32* %3
ret i32 %29
}

LLVM IR (-O2):
define i32 @contains_char(i8* %0, i8 signext %1) {
%3 = tail call i32 @strlen(i8* %0)
%4 = icmp sgt i32 %3, 0
br i1 %4, label %9, label %15
5: ; preds = %9
%6 = tail call i32 @strlen(i8* %0)
%7 = sext i32 %6 to i64
%8 = icmp slt i64 %14, %7
br i1 %8, label %9, label %15
9: ; preds = %2, %5
%10 = phi i64 [ %14, %5 ], [ 0, %2 ]
%11 = getelementptr inbounds i8, i8* %0, i64 %10
%12 = load i8, i8* %11
%13 = icmp eq i8 %12, %1
%14 = add nuw nsw i64 %10, 1
br i1 %13, label %15, label %5
15: ; preds = %9, %5, %2
%16 = phi i32 [ 0, %2 ], [ 0, %5 ], [ 1, %9 ]
ret i32 %16
}