#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*/ scanf(char *, int *);
int readMatrix(int **mat, int m, int n) {
  int i, j;
  for (i = 0; i < m; i++) {
    for (j = 0; j < n; j++) {
      scanf("%d", &mat[i][j]);
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<readMatrix>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %edx,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    118c <readMatrix+0x7c>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    1179 <readMatrix+0x69>
mov    -0x8(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rsi
movslq -0x18(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe9a(%rip),%rdi
call   1030 <scanf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    113c <readMatrix+0x2c>
jmp    117e <readMatrix+0x6e>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1129 <readMatrix+0x19>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<readMatrix>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
mov    %edx,0x4(%rsp)
test   %esi,%esi
jle    117b <readMatrix+0x6b>
mov    %rdi,%r13
mov    %esi,%r15d
mov    0x4(%rsp),%ebp
shl    $0x2,%rbp
xor    %ebx,%ebx
lea    0xec6(%rip),%r12
jmp    1149 <readMatrix+0x39>
nopl   0x0(%rax)
add    $0x1,%rbx
cmp    %r15,%rbx
je     117b <readMatrix+0x6b>
cmpl   $0x0,0x4(%rsp)
jle    1140 <readMatrix+0x30>
xor    %r14d,%r14d
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
mov    0x0(%r13,%rbx,8),%rsi
add    %r14,%rsi
mov    %r12,%rdi
call   1030 <scanf@plt>
add    $0x4,%r14
cmp    %r14,%rbp
jne    1160 <readMatrix+0x50>
jmp    1140 <readMatrix+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
define i32 @readMatrix(i32** %0, i32 %1, i32 %2) {
%4 = alloca i32**
%5 = alloca i32
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
store i32** %0, i32*** %4
store i32 %1, i32* %5
store i32 %2, i32* %6
store i32 0, i32* %7
br label %9
9: ; preds = %32, %3
%10 = load i32, i32* %7
%11 = load i32, i32* %5
%12 = icmp slt i32 %10, %11
br i1 %12, label %13, label %35
13: ; preds = %9
store i32 0, i32* %8
br label %14
14: ; preds = %28, %13
%15 = load i32, i32* %8
%16 = load i32, i32* %6
%17 = icmp slt i32 %15, %16
br i1 %17, label %18, label %31
18: ; preds = %14
%19 = load i32**, i32*** %4
%20 = load i32, i32* %7
%21 = sext i32 %20 to i64
%22 = getelementptr inbounds i32*, i32** %19, i64 %21
%23 = load i32*, i32** %22
%24 = load i32, i32* %8
%25 = sext i32 %24 to i64
%26 = getelementptr inbounds i32, i32* %23, i64 %25
%27 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %26)
br label %28
28: ; preds = %18
%29 = load i32, i32* %8
%30 = add nsw i32 %29, 1
store i32 %30, i32* %8
br label %14
31: ; preds = %14
br label %32
32: ; preds = %31
%33 = load i32, i32* %7
%34 = add nsw i32 %33, 1
store i32 %34, i32* %7
br label %9
35: ; preds = %9
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
define i32 @readMatrix(i32** nocapture %0, i32 %1, i32 %2) {
%4 = icmp sgt i32 %1, 0
br i1 %4, label %5, label %23
5: ; preds = %3
%6 = icmp sgt i32 %2, 0
%7 = zext i32 %1 to i64
%8 = zext i32 %2 to i64
br label %9
9: ; preds = %5, %20
%10 = phi i64 [ 0, %5 ], [ %21, %20 ]
br i1 %6, label %11, label %20
11: ; preds = %9
%12 = getelementptr inbounds i32*, i32** %0, i64 %10
br label %13
13: ; preds = %11, %13
%14 = phi i64 [ 0, %11 ], [ %18, %13 ]
%15 = load i32*, i32** %12
%16 = getelementptr inbounds i32, i32* %15, i64 %14
%17 = tail call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %16)
%18 = add nuw nsw i64 %14, 1
%19 = icmp eq i64 %18, %8
br i1 %19, label %20, label %13
20: ; preds = %13, %9
%21 = add nuw nsw i64 %10, 1
%22 = icmp eq i64 %21, %7
br i1 %22, label %23, label %9
23: ; preds = %20, %3
ret i32 0
}