#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*/ memcpy(double *, double *, int);
int copyMatrix(double **dst, double **src, unsigned long rows,
               unsigned long columns) {
  unsigned long i;
  for (i = 0; i < rows; i++) {
    memcpy(dst[i], src[i], sizeof(double) * columns);
  }
  return 0;
}


x86 assembly (clang, -O0):
<copyMatrix>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    %rcx,-0x20(%rbp)
movq   $0x0,-0x28(%rbp)
mov    -0x28(%rbp),%rax
cmp    -0x18(%rbp),%rax
jae    1176 <copyMatrix+0x66>
mov    -0x8(%rbp),%rax
mov    -0x28(%rbp),%rcx
mov    (%rax,%rcx,8),%rdi
mov    -0x10(%rbp),%rax
mov    -0x28(%rbp),%rcx
mov    (%rax,%rcx,8),%rsi
mov    -0x20(%rbp),%rax
shl    $0x3,%rax
mov    %eax,%edx
call   1030 <memcpy@plt>
mov    -0x28(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x28(%rbp)
jmp    1130 <copyMatrix+0x20>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<copyMatrix>:
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
test   %rdx,%rdx
je     1149 <copyMatrix+0x39>
mov    %rcx,%r14
mov    %rdx,%r13
mov    %rsi,%r15
mov    %rdi,%r12
shl    $0x3,%r14d
xor    %ebx,%ebx
mov    (%r12,%rbx,8),%rdi
mov    (%r15,%rbx,8),%rsi
mov    %r14d,%edx
call   1030 <memcpy@plt>
add    $0x1,%rbx
cmp    %rbx,%r13
jne    1130 <copyMatrix+0x20>
xor    %eax,%eax
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i32 @copyMatrix(double** %0, double** %1, i64 %2, i64 %3) {
%5 = alloca double**
%6 = alloca double**
%7 = alloca i64
%8 = alloca i64
%9 = alloca i64
store double** %0, double*** %5
store double** %1, double*** %6
store i64 %2, i64* %7
store i64 %3, i64* %8
store i64 0, i64* %9
br label %10
10: ; preds = %27, %4
%11 = load i64, i64* %9
%12 = load i64, i64* %7
%13 = icmp ult i64 %11, %12
br i1 %13, label %14, label %30
14: ; preds = %10
%15 = load double**, double*** %5
%16 = load i64, i64* %9
%17 = getelementptr inbounds double*, double** %15, i64 %16
%18 = load double*, double** %17
%19 = load double**, double*** %6
%20 = load i64, i64* %9
%21 = getelementptr inbounds double*, double** %19, i64 %20
%22 = load double*, double** %21
%23 = load i64, i64* %8
%24 = mul i64 8, %23
%25 = trunc i64 %24 to i32
%26 = call i32 @memcpy(double* %18, double* %22, i32 %25)
br label %27
27: ; preds = %14
%28 = load i64, i64* %9
%29 = add i64 %28, 1
store i64 %29, i64* %9
br label %10
30: ; preds = %10
ret i32 0
}

LLVM IR (-O2):
define i32 @copyMatrix(double** nocapture %0, double** nocapture %1, i64 %2, i64 %3) {
%5 = icmp eq i64 %2, 0
br i1 %5, label %18, label %6
6: ; preds = %4
%7 = trunc i64 %3 to i32
%8 = shl i32 %7, 3
br label %9
9: ; preds = %6, %9
%10 = phi i64 [ 0, %6 ], [ %16, %9 ]
%11 = getelementptr inbounds double*, double** %0, i64 %10
%12 = load double*, double** %11
%13 = getelementptr inbounds double*, double** %1, i64 %10
%14 = load double*, double** %13
%15 = tail call i32 @memcpy(double* %12, double* %14, i32 %8)
%16 = add nuw i64 %10, 1
%17 = icmp eq i64 %16, %2
br i1 %17, label %18, label %9
18: ; preds = %9, %4
ret i32 0
}