#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*/ assert(int);
int strlen(char *);
scalar_t__ strncmp(char *, char *, int);
int strStartsWith(char *string, char *search) {
  int stringLen, searchLen;
  assert(string != NULL);
  assert(search != NULL);
  stringLen = strlen(string);
  searchLen = strlen(search);
  assert(searchLen > 0);
  if (searchLen > stringLen)
    return 0;
  return strncmp(string, search, searchLen) == 0;
}


x86 assembly (clang, -O0):
<strStartsWith>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
cmpq   $0x0,-0x10(%rbp)
setne  %al
and    $0x1,%al
movzbl %al,%edi
call   1050 <assert@plt>
cmpq   $0x0,-0x18(%rbp)
setne  %al
and    $0x1,%al
movzbl %al,%edi
call   1050 <assert@plt>
mov    -0x10(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x18(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,-0x20(%rbp)
cmpl   $0x0,-0x20(%rbp)
setg   %al
and    $0x1,%al
movzbl %al,%edi
call   1050 <assert@plt>
mov    -0x20(%rbp),%eax
cmp    -0x1c(%rbp),%eax
jle    11a5 <strStartsWith+0x75>
movl   $0x0,-0x4(%rbp)
jmp    11c4 <strStartsWith+0x94>
mov    -0x10(%rbp),%rdi
mov    -0x18(%rbp),%rsi
mov    -0x20(%rbp),%edx
call   1030 <strncmp@plt>
cmp    $0x0,%rax
sete   %al
and    $0x1,%al
movzbl %al,%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<strStartsWith>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %rdi,%rbx
xor    %edi,%edi
test   %rbx,%rbx
setne  %dil
call   1050 <assert@plt>
xor    %edi,%edi
test   %r14,%r14
setne  %dil
call   1050 <assert@plt>
mov    %rbx,%rdi
call   1040 <strlen@plt>
mov    %eax,%r15d
mov    %r14,%rdi
call   1040 <strlen@plt>
mov    %eax,%ebp
xor    %edi,%edi
test   %eax,%eax
setg   %dil
call   1050 <assert@plt>
xor    %eax,%eax
cmp    %r15d,%ebp
jg     119a <strStartsWith+0x6a>
mov    %rbx,%rdi
mov    %r14,%rsi
mov    %ebp,%edx
call   1030 <strncmp@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
sete   %al
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
define i32 @strStartsWith(i8* %0, i8* %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i32
%7 = alloca i32
store i8* %0, i8** %4
store i8* %1, i8** %5
%8 = load i8*, i8** %4
%9 = icmp ne i8* %8, null
%10 = zext i1 %9 to i32
%11 = call i32 @assert(i32 %10)
%12 = load i8*, i8** %5
%13 = icmp ne i8* %12, null
%14 = zext i1 %13 to i32
%15 = call i32 @assert(i32 %14)
%16 = load i8*, i8** %4
%17 = call i32 @strlen(i8* %16)
store i32 %17, i32* %6
%18 = load i8*, i8** %5
%19 = call i32 @strlen(i8* %18)
store i32 %19, i32* %7
%20 = load i32, i32* %7
%21 = icmp sgt i32 %20, 0
%22 = zext i1 %21 to i32
%23 = call i32 @assert(i32 %22)
%24 = load i32, i32* %7
%25 = load i32, i32* %6
%26 = icmp sgt i32 %24, %25
br i1 %26, label %27, label %28
27: ; preds = %2
store i32 0, i32* %3
br label %35
28: ; preds = %2
%29 = load i8*, i8** %4
%30 = load i8*, i8** %5
%31 = load i32, i32* %7
%32 = call i64 @strncmp(i8* %29, i8* %30, i32 %31)
%33 = icmp eq i64 %32, 0
%34 = zext i1 %33 to i32
store i32 %34, i32* %3
br label %35
35: ; preds = %28, %27
%36 = load i32, i32* %3
ret i32 %36
}

LLVM IR (-O2):
define i32 @strStartsWith(i8* %0, i8* %1) {
%3 = icmp ne i8* %0, null
%4 = zext i1 %3 to i32
%5 = tail call i32 @assert(i32 %4)
%6 = icmp ne i8* %1, null
%7 = zext i1 %6 to i32
%8 = tail call i32 @assert(i32 %7)
%9 = tail call i32 @strlen(i8* %0)
%10 = tail call i32 @strlen(i8* %1)
%11 = icmp sgt i32 %10, 0
%12 = zext i1 %11 to i32
%13 = tail call i32 @assert(i32 %12)
%14 = icmp sgt i32 %10, %9
br i1 %14, label %19, label %15
15: ; preds = %2
%16 = tail call i64 @strncmp(i8* %0, i8* %1, i32 %10)
%17 = icmp eq i64 %16, 0
%18 = zext i1 %17 to i32
br label %19
19: ; preds = %2, %15
%20 = phi i32 [ %18, %15 ], [ 0, %2 ]
ret i32 %20
}