Lpc2000

Hi,

Now I'm trying to dig into the assembler generation from the GCC 
compiler and I've noticed something that I don't quite understand.

Here is the dump that got my attention:
    if (buf_inpos == buf_outpos) T0MR0++; else { // The fifo is empty
       E59F3130   ldr r3, [pc, #304]
       E5D33000   ldrb r3, [r3]
       E51B101C   ldr r1, [r11, #-28]
       E1530001   cmp r3, r1
       1A000009   bne 0x0000093C
       E3A0220E   mov r2, #0xE0000000
       E2822901   add r2, r2, #0x00004000
       E2822018   add r2, r2, #0x00000018
       E3A0320E   mov r3, #0xE0000000
       E2833901   add r3, r3, #0x00004000
       E2833018   add r3, r3, #0x00000018
       E5933000   ldr r3, [r3]
       E2833001   add r3, r3, #0x00000001
       E5823000   str r3, [r2]
       EA000031   b 0x00000A04

How come it takes 3 instruction to load the correct address into r2. 
First it moves #0xE0000000 to r2, then adds #0x00004000 and finally adds 
#0x00000018 to end up with #0xE0004018 which is the address of T0MR0. 
But why don't it just move #0xE0004018 into the r2 in the first instruction?

This strange way of loading the mem location is seen throughout the hole 
dump!

I'm compiling af optimizion level 3.

Best regards
  Jan