How to implement push and pop in LLVM assembly?

I want to implement push and pop operations in an LLVM assembly.

The alloca command does not follow the concept of stack, push and pop.

Examples:

PUSH
x 86

subl  $4, %esp
movl  %eax, 0(%esp)

or

pushl  %eax

MIPS

addi  $sp, $sp, -4
sw    $t2, 0($sp)

POP
x 86

movl  0(%esp), %eax
addl  $4, %esp

or

popl  %eax

MIPS

lw    $t2, 0($sp)
addi  $sp, $sp, 4

EDIT 1:

I need a platform independent solution.

First
I want to use the top of the stack to store temporary objects.

"a * b + c * d + e * f" , . "a * b" , "a" "b" , , , "a * b", "a" "".

call_function( &Object(), &(a + b) );

"& Object()" , , .

. , . , , .