#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 */
scalar_t__ malloc(int);
int /*<<< orphan*/ memcpy(char *, char const *, int);
int strlen(char const *);
char *Gif_CopyString(const char *s) {
  int l;
  char *copy;
  if (!s)
    return 0;
  l = strlen(s);
  copy = ((char *)malloc(sizeof(char) * (l + 1)));
  if (!copy)
    return 0;
  memcpy(copy, s, l + 1);
  return copy;
}


x86 assembly (clang, -O0):
<Gif_CopyString>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
jne    1154 <Gif_CopyString+0x24>
movq   $0x0,-0x8(%rbp)
jmp    11aa <Gif_CopyString+0x7a>
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%eax
add    $0x1,%eax
cltq
shl    $0x0,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    118f <Gif_CopyString+0x5f>
movq   $0x0,-0x8(%rbp)
jmp    11aa <Gif_CopyString+0x7a>
mov    -0x20(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x14(%rbp),%edx
add    $0x1,%edx
call   1040 <memcpy@plt>
mov    -0x20(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<Gif_CopyString>:
push   %rbp
push   %r14
push   %rbx
test   %rdi,%rdi
je     1164 <Gif_CopyString+0x34>
mov    %rdi,%r14
call   1030 <strlen@plt>
mov    %eax,%ebp
add    $0x1,%ebp
mov    %ebp,%edi
call   1050 <malloc@plt>
test   %rax,%rax
je     1164 <Gif_CopyString+0x34>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r14,%rsi
mov    %ebp,%edx
call   1040 <memcpy@plt>
jmp    1166 <Gif_CopyString+0x36>
xor    %ebx,%ebx
mov    %rbx,%rax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define i8* @Gif_CopyString(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i8*
store i8* %0, i8** %3
%6 = load i8*, i8** %3
%7 = icmp ne i8* %6, null
br i1 %7, label %9, label %8
8: ; preds = %1
store i8* null, i8** %2
br label %29
9: ; preds = %1
%10 = load i8*, i8** %3
%11 = call i32 @strlen(i8* %10)
store i32 %11, i32* %4
%12 = load i32, i32* %4
%13 = add nsw i32 %12, 1
%14 = sext i32 %13 to i64
%15 = mul i64 1, %14
%16 = trunc i64 %15 to i32
%17 = call i64 @malloc(i32 %16)
%18 = inttoptr i64 %17 to i8*
store i8* %18, i8** %5
%19 = load i8*, i8** %5
%20 = icmp ne i8* %19, null
br i1 %20, label %22, label %21
21: ; preds = %9
store i8* null, i8** %2
br label %29
22: ; preds = %9
%23 = load i8*, i8** %5
%24 = load i8*, i8** %3
%25 = load i32, i32* %4
%26 = add nsw i32 %25, 1
%27 = call i32 @memcpy(i8* %23, i8* %24, i32 %26)
%28 = load i8*, i8** %5
store i8* %28, i8** %2
br label %29
29: ; preds = %22, %21, %8
%30 = load i8*, i8** %2
ret i8* %30
}

LLVM IR (-O2):
define i8* @Gif_CopyString(i8* %0) {
%2 = icmp eq i8* %0, null
br i1 %2, label %11, label %3
3: ; preds = %1
%4 = tail call i32 @strlen(i8* %0)
%5 = add nsw i32 %4, 1
%6 = tail call i64 @malloc(i32 %5)
%7 = inttoptr i64 %6 to i8*
%8 = icmp eq i64 %6, 0
br i1 %8, label %11, label %9
9: ; preds = %3
%10 = tail call i32 @memcpy(i8* %7, i8* %0, i32 %5)
br label %11
11: ; preds = %3, %1, %9
%12 = phi i8* [ %7, %9 ], [ null, %1 ], [ null, %3 ]
ret i8* %12
}