#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 */
struct stat {
  long st_size;
};

/* Variables and functions */
int /*<<< orphan*/ errno;
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
scalar_t__ lstat(char *, struct stat *);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
long getSize(char *pathname) {
  struct stat st;
  if (lstat(pathname, &st) < 0) {
    fprintf(stderr, "stat error: %s\n", strerror(errno));
    exit(1);
  }
  return st.st_size;
}


x86 assembly (clang, -O0):
<getSize>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    -0x10(%rbp),%rsi
call   1030 <lstat@plt>
cmp    $0x0,%rax
jge    1199 <getSize+0x59>
mov    0x2e76(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x14(%rbp)
mov    0x2e62(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
mov    -0x14(%rbp),%edi
mov    %rax,%rdx
lea    0xe76(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1050 <exit@plt>
mov    -0x10(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<getSize>:
push   %rbx
sub    $0x10,%rsp
lea    0x8(%rsp),%rsi
call   1030 <lstat@plt>
test   %rax,%rax
js     115f <getSize+0x1f>
mov    0x8(%rsp),%rax
add    $0x10,%rsp
pop    %rbx
ret
mov    0x2e7a(%rip),%rax
mov    (%rax),%ebx
mov    0x2e69(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
lea    0xe83(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
%struct.stat = type { i64 }
@stderr = global i32 0
@.str = [16 x i8] c"stat error: %s\0A\00"
@errno = global i32 0
define i64 @getSize(i8* %0) {
%2 = alloca i8*
%3 = alloca %struct.stat
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i64 @lstat(i8* %4, %struct.stat* %3)
%6 = icmp slt i64 %5, 0
br i1 %6, label %7, label %13
7: ; preds = %1
%8 = load i32, i32* @stderr
%9 = load i32, i32* @errno
%10 = call i8* @strerror(i32 %9)
%11 = call i32 @fprintf(i32 %8, i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %10)
%12 = call i32 @exit(i32 1)
unreachable
13: ; preds = %1
%14 = getelementptr inbounds %struct.stat, %struct.stat* %3, i32 0, i32 0
%15 = load i64, i64* %14
ret i64 %15
}

LLVM IR (-O2):
%struct.stat = type { i64 }
@stderr = global i32 0
@.str = [16 x i8] c"stat error: %s\0A\00"
@errno = global i32 0
define i64 @getSize(i8* nocapture %0) {
%2 = alloca %struct.stat
%3 = bitcast %struct.stat* %2 to i8*
%4 = call i64 @lstat(i8* %0, %struct.stat* %2)
%5 = icmp slt i64 %4, 0
br i1 %5, label %6, label %12
6: ; preds = %1
%7 = load i32, i32* @stderr
%8 = load i32, i32* @errno
%9 = tail call i8* @strerror(i32 %8)
%10 = tail call i32 @fprintf(i32 %7, i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %9)
%11 = tail call i32 @exit(i32 1)
unreachable
12: ; preds = %1
%13 = getelementptr inbounds %struct.stat, %struct.stat* %2, i64 0, i32 0
%14 = load i64, i64* %13
ret i64 %14
}