#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 */
typedef int /*<<< orphan*/ SHA256_CTX;

/* Variables and functions */
int SHA256_DIGEST_LENGTH;
int /*<<< orphan*/ SHA256_Final(unsigned char *, int /*<<< orphan*/ *);
int /*<<< orphan*/ SHA256_Init(int /*<<< orphan*/ *);
int /*<<< orphan*/ SHA256_Update(int /*<<< orphan*/ *, unsigned char *, int);
int /*<<< orphan*/ sprintf(char *, char *, unsigned char);
void sha256_8bytes(unsigned char *string, char outputBuffer[65]) {
  unsigned char hash[SHA256_DIGEST_LENGTH];
  SHA256_CTX sha256;
  SHA256_Init(&sha256);
  SHA256_Update(&sha256, string, 8);
  SHA256_Final(hash, &sha256);
  int i = 0;
  for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
    sprintf(outputBuffer + (i * 2), "%02x", hash[i]);
  }
  outputBuffer[64] = 0;
}


x86 assembly (clang, -O0):
<sha256_8bytes>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    0x2e89(%rip),%rax
mov    (%rax),%eax
mov    %rsp,%rcx
mov    %rcx,-0x18(%rbp)
mov    %rax,%rdx
add    $0xf,%rdx
and    $0xfffffffffffffff0,%rdx
mov    %rsp,%rcx
sub    %rdx,%rcx
mov    %rcx,-0x30(%rbp)
mov    %rcx,%rsp
mov    %rax,-0x20(%rbp)
lea    -0x24(%rbp),%rdi
call   1030 <SHA256_Init@plt>
mov    -0x8(%rbp),%rsi
lea    -0x24(%rbp),%rdi
mov    $0x8,%edx
call   1050 <SHA256_Update@plt>
mov    -0x30(%rbp),%rdi
lea    -0x24(%rbp),%rsi
call   1040 <SHA256_Final@plt>
movl   $0x0,-0x28(%rbp)
movl   $0x0,-0x28(%rbp)
mov    -0x28(%rbp),%eax
mov    0x2e24(%rip),%rcx
cmp    (%rcx),%eax
jge    11fa <sha256_8bytes+0xba>
mov    -0x30(%rbp),%rax
mov    -0x10(%rbp),%rdi
mov    -0x28(%rbp),%ecx
shl    $0x1,%ecx
movslq %ecx,%rcx
add    %rcx,%rdi
movslq -0x28(%rbp),%rcx
lea    0xe1d(%rip),%rsi
movzbl (%rax,%rcx,1),%edx
call   1060 <sprintf@plt>
mov    -0x28(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x28(%rbp)
jmp    11b2 <sha256_8bytes+0x72>
mov    -0x10(%rbp),%rax
movb   $0x0,0x40(%rax)
mov    -0x18(%rbp),%rax
mov    %rax,%rsp
mov    %rbp,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<sha256_8bytes>:
push   %rbp
mov    %rsp,%rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x18,%rsp
mov    %rsi,-0x30(%rbp)
mov    %rdi,%r15
mov    0x2e81(%rip),%r13
mov    0x0(%r13),%eax
mov    %rsp,%r12
add    $0xf,%rax
and    $0xfffffffffffffff0,%rax
sub    %rax,%r12
mov    %r12,%rsp
lea    -0x34(%rbp),%rbx
mov    %rbx,%rdi
call   1030 <SHA256_Init@plt>
mov    %rbx,%rdi
mov    %r15,%rsi
mov    $0x8,%edx
call   1050 <SHA256_Update@plt>
mov    %r12,%rdi
mov    %rbx,%rsi
call   1040 <SHA256_Final@plt>
cmpl   $0x0,0x0(%r13)
jle    11d1 <sha256_8bytes+0x91>
xor    %r14d,%r14d
lea    0xe54(%rip),%r15
mov    -0x30(%rbp),%rbx
movzbl (%r12,%r14,1),%edx
mov    %rbx,%rdi
mov    %r15,%rsi
call   1060 <sprintf@plt>
add    $0x1,%r14
movslq 0x0(%r13),%rax
add    $0x2,%rbx
cmp    %rax,%r14
jl     11b0 <sha256_8bytes+0x70>
mov    -0x30(%rbp),%rax
movb   $0x0,0x40(%rax)
lea    -0x28(%rbp),%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@SHA256_DIGEST_LENGTH = global i32 0
@.str = [5 x i8] c"%02x\00"
define void @sha256_8bytes(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i64
%7 = alloca i32
%8 = alloca i32
store i8* %0, i8** %3
store i8* %1, i8** %4
%9 = load i32, i32* @SHA256_DIGEST_LENGTH
%10 = zext i32 %9 to i64
%11 = call i8* @llvm.stacksave()
store i8* %11, i8** %5
%12 = alloca i8, i64 %10
store i64 %10, i64* %6
%13 = call i32 @SHA256_Init(i32* %7)
%14 = load i8*, i8** %3
%15 = call i32 @SHA256_Update(i32* %7, i8* %14, i32 8)
%16 = call i32 @SHA256_Final(i8* %12, i32* %7)
store i32 0, i32* %8
store i32 0, i32* %8
br label %17
17: ; preds = %32, %2
%18 = load i32, i32* %8
%19 = load i32, i32* @SHA256_DIGEST_LENGTH
%20 = icmp slt i32 %18, %19
br i1 %20, label %21, label %35
21: ; preds = %17
%22 = load i8*, i8** %4
%23 = load i32, i32* %8
%24 = mul nsw i32 %23, 2
%25 = sext i32 %24 to i64
%26 = getelementptr inbounds i8, i8* %22, i64 %25
%27 = load i32, i32* %8
%28 = sext i32 %27 to i64
%29 = getelementptr inbounds i8, i8* %12, i64 %28
%30 = load i8, i8* %29
%31 = call i32 @sprintf(i8* %26, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8 zeroext %30)
br label %32
32: ; preds = %21
%33 = load i32, i32* %8
%34 = add nsw i32 %33, 1
store i32 %34, i32* %8
br label %17
35: ; preds = %17
%36 = load i8*, i8** %4
%37 = getelementptr inbounds i8, i8* %36, i64 64
store i8 0, i8* %37
%38 = load i8*, i8** %5
ret void
}

LLVM IR (-O2):
@SHA256_DIGEST_LENGTH = global i32 0
@.str = [5 x i8] c"%02x\00"
define void @sha256_8bytes(i8* %0, i8* nocapture writeonly %1) {
%3 = alloca i32
%4 = load i32, i32* @SHA256_DIGEST_LENGTH
%5 = zext i32 %4 to i64
%6 = alloca i8, i64 %5
%7 = bitcast i32* %3 to i8*
%8 = call i32 @SHA256_Init(i32* %3)
%9 = call i32 @SHA256_Update(i32* %3, i8* %0, i32 8)
%10 = call i32 @SHA256_Final(i8* %6, i32* %3)
%11 = load i32, i32* @SHA256_DIGEST_LENGTH
%12 = icmp sgt i32 %11, 0
br i1 %12, label %13, label %24
13: ; preds = %2, %13
%14 = phi i64 [ %20, %13 ], [ 0, %2 ]
%15 = shl nuw nsw i64 %14, 1
%16 = getelementptr inbounds i8, i8* %1, i64 %15
%17 = getelementptr inbounds i8, i8* %6, i64 %14
%18 = load i8, i8* %17
%19 = call i32 @sprintf(i8* dereferenceable(1) %16, i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8 zeroext %18)
%20 = add nuw nsw i64 %14, 1
%21 = load i32, i32* @SHA256_DIGEST_LENGTH
%22 = sext i32 %21 to i64
%23 = icmp slt i64 %20, %22
br i1 %23, label %13, label %24
24: ; preds = %13, %2
%25 = getelementptr inbounds i8, i8* %1, i64 64
store i8 0, i8* %25
ret void
}