#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*/ EXIT_FAILURE;
int /*<<< orphan*/ errno;
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
void *realloc(void *, size_t);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
void *xrealloc(void *p, size_t size) {
  void *np = realloc(p, size);
  if (np == NULL) {
    fprintf(stderr, "error: fatal: out of memory: %s\n", strerror(errno));
    exit(EXIT_FAILURE);
  }
  return np;
}


x86 assembly (clang, -O0):
<xrealloc>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1040 <realloc@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11a6 <xrealloc+0x66>
mov    0x2e6d(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    0x2e59(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
mov    -0x1c(%rbp),%edi
mov    %rax,%rdx
lea    0xe6d(%rip),%rsi
call   1030 <fprintf@plt>
mov    0x2e31(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>
mov    -0x18(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<xrealloc>:
push   %rbx
call   1040 <realloc@plt>
test   %rax,%rax
je     114d <xrealloc+0xd>
pop    %rbx
ret
mov    0x2e8c(%rip),%rax
mov    (%rax),%ebx
mov    0x2e7b(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
lea    0xe95(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1030 <fprintf@plt>
mov    0x2e54(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [33 x i8] c"error: fatal: out of memory: %s\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
define i8* @xrealloc(i8* %0, i64 %1) {
%3 = alloca i8*
%4 = alloca i64
%5 = alloca i8*
store i8* %0, i8** %3
store i64 %1, i64* %4
%6 = load i8*, i8** %3
%7 = load i64, i64* %4
%8 = call i8* @realloc(i8* %6, i64 %7)
store i8* %8, i8** %5
%9 = load i8*, i8** %5
%10 = icmp eq i8* %9, null
br i1 %10, label %11, label %18
11: ; preds = %2
%12 = load i32, i32* @stderr
%13 = load i32, i32* @errno
%14 = call i8* @strerror(i32 %13)
%15 = call i32 @fprintf(i32 %12, i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0), i8* %14)
%16 = load i32, i32* @EXIT_FAILURE
%17 = call i32 @exit(i32 %16)
unreachable
18: ; preds = %2
%19 = load i8*, i8** %5
ret i8* %19
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [33 x i8] c"error: fatal: out of memory: %s\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
define noalias i8* @xrealloc(i8* nocapture %0, i64 %1) {
%3 = tail call i8* @realloc(i8* %0, i64 %1)
%4 = icmp eq i8* %3, null
br i1 %4, label %5, label %12
5: ; preds = %2
%6 = load i32, i32* @stderr
%7 = load i32, i32* @errno
%8 = tail call i8* @strerror(i32 %7)
%9 = tail call i32 @fprintf(i32 %6, i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0), i8* %8)
%10 = load i32, i32* @EXIT_FAILURE
%11 = tail call i32 @exit(i32 %10)
unreachable
12: ; preds = %2
ret i8* %3
}