#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 timeval {
  long tv_usec;
  scalar_t__ tv_sec;
};

/* Variables and functions */
void timeval_add(struct timeval *sum, struct timeval *addend_a,
                 struct timeval *addend_b) {
  sum->tv_sec = addend_a->tv_sec + addend_b->tv_sec;
  sum->tv_usec = addend_a->tv_usec + addend_b->tv_usec;
  if (sum->tv_usec >= (1000000L)) {
    sum->tv_sec++;
    sum->tv_usec -= (1000000L);
  }
}


x86 assembly (clang, -O0):
<timeval_add>:
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rcx
mov    -0x18(%rbp),%rax
add    0x8(%rax),%rcx
mov    -0x8(%rbp),%rax
mov    %rcx,0x8(%rax)
mov    -0x10(%rbp),%rax
mov    (%rax),%rcx
mov    -0x18(%rbp),%rax
add    (%rax),%rcx
mov    -0x8(%rbp),%rax
mov    %rcx,(%rax)
mov    -0x8(%rbp),%rax
cmpq   $0xf4240,(%rax)
jl     116f <timeval_add+0x6f>
mov    -0x8(%rbp),%rax
mov    0x8(%rax),%rcx
add    $0x1,%rcx
mov    %rcx,0x8(%rax)
mov    -0x8(%rbp),%rax
mov    (%rax),%rcx
sub    $0xf4240,%rcx
mov    %rcx,(%rax)
pop    %rbp
ret

x86 assembly (clang, -O2):
<timeval_add>:
movdqu (%rsi),%xmm1
movdqu (%rdx),%xmm0
paddq  %xmm1,%xmm0
movdqu %xmm0,(%rdi)
movq   %xmm0,%rax
cmp    $0xf4240,%rax
jl     1129 <timeval_add+0x29>
paddq  0xedb(%rip),%xmm0
movdqu %xmm0,(%rdi)
ret

LLVM IR (-O0):
%struct.timeval = type { i64, i64 }
define void @timeval_add(%struct.timeval* %0, %struct.timeval* %1, %struct.timeval* %2) {
%4 = alloca %struct.timeval*
%5 = alloca %struct.timeval*
%6 = alloca %struct.timeval*
store %struct.timeval* %0, %struct.timeval** %4
store %struct.timeval* %1, %struct.timeval** %5
store %struct.timeval* %2, %struct.timeval** %6
%7 = load %struct.timeval*, %struct.timeval** %5
%8 = getelementptr inbounds %struct.timeval, %struct.timeval* %7, i32 0, i32 1
%9 = load i64, i64* %8
%10 = load %struct.timeval*, %struct.timeval** %6
%11 = getelementptr inbounds %struct.timeval, %struct.timeval* %10, i32 0, i32 1
%12 = load i64, i64* %11
%13 = add nsw i64 %9, %12
%14 = load %struct.timeval*, %struct.timeval** %4
%15 = getelementptr inbounds %struct.timeval, %struct.timeval* %14, i32 0, i32 1
store i64 %13, i64* %15
%16 = load %struct.timeval*, %struct.timeval** %5
%17 = getelementptr inbounds %struct.timeval, %struct.timeval* %16, i32 0, i32 0
%18 = load i64, i64* %17
%19 = load %struct.timeval*, %struct.timeval** %6
%20 = getelementptr inbounds %struct.timeval, %struct.timeval* %19, i32 0, i32 0
%21 = load i64, i64* %20
%22 = add nsw i64 %18, %21
%23 = load %struct.timeval*, %struct.timeval** %4
%24 = getelementptr inbounds %struct.timeval, %struct.timeval* %23, i32 0, i32 0
store i64 %22, i64* %24
%25 = load %struct.timeval*, %struct.timeval** %4
%26 = getelementptr inbounds %struct.timeval, %struct.timeval* %25, i32 0, i32 0
%27 = load i64, i64* %26
%28 = icmp sge i64 %27, 1000000
br i1 %28, label %29, label %38
29: ; preds = %3
%30 = load %struct.timeval*, %struct.timeval** %4
%31 = getelementptr inbounds %struct.timeval, %struct.timeval* %30, i32 0, i32 1
%32 = load i64, i64* %31
%33 = add nsw i64 %32, 1
store i64 %33, i64* %31
%34 = load %struct.timeval*, %struct.timeval** %4
%35 = getelementptr inbounds %struct.timeval, %struct.timeval* %34, i32 0, i32 0
%36 = load i64, i64* %35
%37 = sub nsw i64 %36, 1000000
store i64 %37, i64* %35
br label %38
38: ; preds = %29, %3
ret void
}

LLVM IR (-O2):
%struct.timeval = type { i64, i64 }
define void @timeval_add(%struct.timeval* nocapture %0, %struct.timeval* nocapture %1, %struct.timeval* nocapture %2) {
%4 = bitcast %struct.timeval* %1 to <2 x i64>*
%5 = load <2 x i64>, <2 x i64>* %4
%6 = bitcast %struct.timeval* %2 to <2 x i64>*
%7 = load <2 x i64>, <2 x i64>* %6
%8 = add nsw <2 x i64> %7, %5
%9 = bitcast %struct.timeval* %0 to <2 x i64>*
store <2 x i64> %8, <2 x i64>* %9
%10 = extractelement <2 x i64> %8, i64 0
%11 = icmp sgt i64 %10, 999999
br i1 %11, label %12, label %15
12: ; preds = %3
%13 = add nsw <2 x i64> %8, <i64 -1000000, i64 1>
%14 = bitcast %struct.timeval* %0 to <2 x i64>*
store <2 x i64> %13, <2 x i64>* %14
br label %15
15: ; preds = %12, %3
ret void
}