#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 EXIT_FAILURE;
int EXIT_SUCCESS;
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char const *);
int /*<<< orphan*/ performOneRead(char const *);
int /*<<< orphan*/ stderr;
int main(int argc, const char *argv[]) {
  if (argc != 2) {
    fprintf(stderr, "Usage: %s filename\n", argv[0]);
    return EXIT_FAILURE;
  }
  performOneRead(argv[1]);
  return EXIT_SUCCESS;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     116d <main+0x4d>
mov    0x2e99(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xea9(%rip),%rsi
call   1040 <fprintf@plt>
mov    0x2e75(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    1186 <main+0x66>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1030 <performOneRead@plt>
mov    0x2e4f(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jne    1138 <main+0x18>
mov    0x8(%rsi),%rdi
call   1030 <performOneRead@plt>
mov    0x2e9a(%rip),%rax
jmp    1157 <main+0x37>
mov    0x2ea1(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xeb5(%rip),%rsi
call   1040 <fprintf@plt>
mov    0x2e81(%rip),%rax
mov    (%rax),%eax
pop    %rcx
ret

LLVM IR (-O0):
@stderr = global i32 0
@.str = [20 x i8] c"Usage: %s filename\0A\00"
@EXIT_FAILURE = global i32 0
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp ne i32 %6, 2
br i1 %7, label %8, label %15
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* %12)
%14 = load i32, i32* @EXIT_FAILURE
store i32 %14, i32* %3
br label %21
15: ; preds = %2
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call i32 @performOneRead(i8* %18)
%20 = load i32, i32* @EXIT_SUCCESS
store i32 %20, i32* %3
br label %21
21: ; preds = %15, %8
%22 = load i32, i32* %3
ret i32 %22
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [20 x i8] c"Usage: %s filename\0A\00"
@EXIT_FAILURE = global i32 0
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %12
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32 @performOneRead(i8* %10)
br label %12
12: ; preds = %8, %4
%13 = phi i32* [ @EXIT_FAILURE, %4 ], [ @EXIT_SUCCESS, %8 ]
%14 = load i32, i32* %13
ret i32 %14
}