On Tue, Sep 07, 2010, Julian Brown wrote:
Doyou still have the code fragment handy (I don't remember exactly how it went)?
You can extract it from the wiki history with the "Info" action on the page and then diffing revisions:
1. stmdb/ldmia registers that are not used * Observations {{{ Dump of assembler code for function history_expand_line_internal: 0x00001c1c <+0>: stmdb sp!, {r4, r5, r6, r7, r8, lr} 0x00001c20 <+4>: movs r1, #0 0x00001c22 <+6>: ldr r5, [pc, #52] ; (0x1c58 <history_expand_line_internal+60>) 0x00001c24 <+8>: mov r2, r1 0x00001c26 <+10>: mov r6, r0 0x00001c28 <+12>: ldr r7, [r5, #0] 0x00001c2a <+14>: str r1, [r5, #0] 0x00001c2c <+16>: bl 0x1c2c <history_expand_line_internal+16> 0x00001c30 <+20>: str r7, [r5, #0] 0x00001c32 <+22>: cmp r0, r6 0x00001c34 <+24>: mov r4, r0 0x00001c36 <+26>: bne.n 0x1c52 <history_expand_line_internal+54> 0x00001c38 <+28>: bl 0x1c38 <history_expand_line_internal+28> 0x00001c3c <+32>: ldr r1, [pc, #28] ; (0x1c5c <history_expand_line_internal+64>) 0x00001c3e <+34>: movw r2, #1850 ; 0x73a 0x00001c42 <+38>: adds r0, #1 0x00001c44 <+40>: bl 0x1c44 <history_expand_line_internal+40> 0x00001c48 <+44>: mov r1, r4 0x00001c4a <+46>: ldmia.w sp!, {r4, r5, r6, r7, r8, lr} 0x00001c4e <+50>: b.w 0x1c4e <history_expand_line_internal+50> 0x00001c52 <+54>: ldmia.w sp!, {r4, r5, r6, r7, r8, pc} 0x00001c56 <+58>: nop 0x00001c58 <+60>: andeq r0, r0, r0 0x00001c5c <+64>: andeq r0, r0, r0 }}} Register r8 is not used in this function, so no need to save/restore r8. * Possible improvements