g(x, y) int x[][4], *y[];
{
  int i, j;
  for (i = 0; i < 3; i++)
    for (j = 0; j < 4; j++)
      printf(" %d", x[i][j]);
  printf("\n");
  for (i = 0; i < 3; i++)
    for (j = 0; j < 4; j++)
      printf(" %d", y[i][j]);
  printf("\n");
}


x86 assembly (clang, -O0):
<g>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
movl   $0x0,-0x1c(%rbp)
cmpl   $0x3,-0x1c(%rbp)
jge    1187 <g+0x77>
movl   $0x0,-0x20(%rbp)
cmpl   $0x4,-0x20(%rbp)
jge    1174 <g+0x64>
mov    -0x10(%rbp),%rax
movslq -0x1c(%rbp),%rcx
shl    $0x4,%rcx
add    %rcx,%rax
movslq -0x20(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x20(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x20(%rbp)
jmp    1138 <g+0x28>
jmp    1179 <g+0x69>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    1127 <g+0x17>
lea    0xe76(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x1c(%rbp)
cmpl   $0x3,-0x1c(%rbp)
jge    11f9 <g+0xe9>
movl   $0x0,-0x20(%rbp)
cmpl   $0x4,-0x20(%rbp)
jge    11e6 <g+0xd6>
mov    -0x18(%rbp),%rax
movslq -0x1c(%rbp),%rcx
mov    (%rax,%rcx,8),%rax
movslq -0x20(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe2f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x20(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x20(%rbp)
jmp    11ad <g+0x9d>
jmp    11eb <g+0xdb>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    119c <g+0x8c>
lea    0xe04(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<g>:
push   %r15
push   %r14
push   %rbx
mov    %rsi,%r15
mov    %rdi,%rbx
mov    (%rdi),%esi
lea    0xecc(%rip),%r14
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x4(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0xc(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x10(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x14(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x18(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x1c(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x20(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x24(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x28(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x2c(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
mov    (%r15),%rax
mov    (%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    (%r15),%rax
mov    0x4(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    (%r15),%rax
mov    0x8(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    (%r15),%rax
mov    0xc(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%r15),%rax
mov    (%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%r15),%rax
mov    0x4(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%r15),%rax
mov    0x8(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x8(%r15),%rax
mov    0xc(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x10(%r15),%rax
mov    (%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x10(%r15),%rax
mov    0x4(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x10(%r15),%rax
mov    0x8(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x10(%r15),%rax
mov    0xc(%rax),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
pop    %rbx
pop    %r14
pop    %r15
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [4 x i8] c" %d\00"
@.str.1 = [2 x i8] c"\0A\00"
define i32 @g([4 x i32]* %0, i32** %1) {
%3 = alloca i32
%4 = alloca [4 x i32]*
%5 = alloca i32**
%6 = alloca i32
%7 = alloca i32
store [4 x i32]* %0, [4 x i32]** %4
store i32** %1, i32*** %5
store i32 0, i32* %6
br label %8
8: ; preds = %29, %2
%9 = load i32, i32* %6
%10 = icmp slt i32 %9, 3
br i1 %10, label %11, label %32
11: ; preds = %8
store i32 0, i32* %7
br label %12
12: ; preds = %25, %11
%13 = load i32, i32* %7
%14 = icmp slt i32 %13, 4
br i1 %14, label %15, label %28
15: ; preds = %12
%16 = load [4 x i32]*, [4 x i32]** %4
%17 = load i32, i32* %6
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds [4 x i32], [4 x i32]* %16, i64 %18
%20 = load i32, i32* %7
%21 = sext i32 %20 to i64
%22 = getelementptr inbounds [4 x i32], [4 x i32]* %19, i64 0, i64 %21
%23 = load i32, i32* %22
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %23)
br label %25
25: ; preds = %15
%26 = load i32, i32* %7
%27 = add nsw i32 %26, 1
store i32 %27, i32* %7
br label %12
28: ; preds = %12
br label %29
29: ; preds = %28
%30 = load i32, i32* %6
%31 = add nsw i32 %30, 1
store i32 %31, i32* %6
br label %8
32: ; preds = %8
%33 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32 0, i32* %6
br label %34
34: ; preds = %56, %32
%35 = load i32, i32* %6
%36 = icmp slt i32 %35, 3
br i1 %36, label %37, label %59
37: ; preds = %34
store i32 0, i32* %7
br label %38
38: ; preds = %52, %37
%39 = load i32, i32* %7
%40 = icmp slt i32 %39, 4
br i1 %40, label %41, label %55
41: ; preds = %38
%42 = load i32**, i32*** %5
%43 = load i32, i32* %6
%44 = sext i32 %43 to i64
%45 = getelementptr inbounds i32*, i32** %42, i64 %44
%46 = load i32*, i32** %45
%47 = load i32, i32* %7
%48 = sext i32 %47 to i64
%49 = getelementptr inbounds i32, i32* %46, i64 %48
%50 = load i32, i32* %49
%51 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %50)
br label %52
52: ; preds = %41
%53 = load i32, i32* %7
%54 = add nsw i32 %53, 1
store i32 %54, i32* %7
br label %38
55: ; preds = %38
br label %56
56: ; preds = %55
%57 = load i32, i32* %6
%58 = add nsw i32 %57, 1
store i32 %58, i32* %6
br label %34
59: ; preds = %34
%60 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%61 = load i32, i32* %3
ret i32 %61
}

LLVM IR (-O2):
@.str = [4 x i8] c" %d\00"
define i32 @g([4 x i32]* nocapture %0, i32** nocapture %1) {
%3 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 0, i64 0
%4 = load i32, i32* %3
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %4)
%6 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 0, i64 1
%7 = load i32, i32* %6
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 0, i64 2
%10 = load i32, i32* %9
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %10)
%12 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 0, i64 3
%13 = load i32, i32* %12
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %13)
%15 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 1, i64 0
%16 = load i32, i32* %15
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %16)
%18 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 1, i64 1
%19 = load i32, i32* %18
%20 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %19)
%21 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 1, i64 2
%22 = load i32, i32* %21
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %22)
%24 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 1, i64 3
%25 = load i32, i32* %24
%26 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %25)
%27 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 2, i64 0
%28 = load i32, i32* %27
%29 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %28)
%30 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 2, i64 1
%31 = load i32, i32* %30
%32 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %31)
%33 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 2, i64 2
%34 = load i32, i32* %33
%35 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %34)
%36 = getelementptr inbounds [4 x i32], [4 x i32]* %0, i64 2, i64 3
%37 = load i32, i32* %36
%38 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %37)
%39 = tail call i32 @putchar(i32 10)
%40 = load i32*, i32** %1
%41 = load i32, i32* %40
%42 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %41)
%43 = load i32*, i32** %1
%44 = getelementptr inbounds i32, i32* %43, i64 1
%45 = load i32, i32* %44
%46 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %45)
%47 = load i32*, i32** %1
%48 = getelementptr inbounds i32, i32* %47, i64 2
%49 = load i32, i32* %48
%50 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %49)
%51 = load i32*, i32** %1
%52 = getelementptr inbounds i32, i32* %51, i64 3
%53 = load i32, i32* %52
%54 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %53)
%55 = getelementptr inbounds i32*, i32** %1, i64 1
%56 = load i32*, i32** %55
%57 = load i32, i32* %56
%58 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %57)
%59 = load i32*, i32** %55
%60 = getelementptr inbounds i32, i32* %59, i64 1
%61 = load i32, i32* %60
%62 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %61)
%63 = load i32*, i32** %55
%64 = getelementptr inbounds i32, i32* %63, i64 2
%65 = load i32, i32* %64
%66 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %65)
%67 = load i32*, i32** %55
%68 = getelementptr inbounds i32, i32* %67, i64 3
%69 = load i32, i32* %68
%70 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %69)
%71 = getelementptr inbounds i32*, i32** %1, i64 2
%72 = load i32*, i32** %71
%73 = load i32, i32* %72
%74 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %73)
%75 = load i32*, i32** %71
%76 = getelementptr inbounds i32, i32* %75, i64 1
%77 = load i32, i32* %76
%78 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %77)
%79 = load i32*, i32** %71
%80 = getelementptr inbounds i32, i32* %79, i64 2
%81 = load i32, i32* %80
%82 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %81)
%83 = load i32*, i32** %71
%84 = getelementptr inbounds i32, i32* %83, i64 3
%85 = load i32, i32* %84
%86 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %85)
%87 = tail call i32 @putchar(i32 10)
ret i32 undef
}