Hi,
is the toolchain somehow excessively naive only on arm, or is the output like
this to be expected, and what other archs are also running with?
I'm pointing at the bhi looping back to "mov r3, #0" instead of straight to
"str r3, [r1]" as ridiculous by the compiler even if no additional flags given,
any chance to improve here?
example:
/*
* Called from armv7_boot.S during boot,
* this was the first C code that's run,
* now we have _bootstrap_early() before us,
* and this is where we jump to main() from.
*/
__dead void
armv7_bootstrap(struct armv7_bootinfo *bi)
{
/* zero .bss */
while (bi->_bss < bi->__ebss)
*bi->_bss++ = 0;
cpu_drain_writebuf();
c023c8c0 <armv7_bootstrap>:
c023c8c0: e1a0c00d mov ip, sp
c023c8c4: e1a09000 mov r9, r0
c023c8c8: e92dd800 stmdb sp!, {fp, ip, lr, pc}
c023c8cc: e24cb004 sub fp, ip, #4 ; 0x4
c023c8d0: e24dd030 sub sp, sp, #48 ; 0x30
c023c8d4: e590104c ldr r1, [r0, #76]
c023c8d8: e5903050 ldr r3, [r0, #80]
c023c8dc: e1530001 cmp r3, r1
c023c8e0: 9a000005 bls c023c8fc <armv7_bootstrap+0x3c>
c023c8e4: e3a03000 mov r3, #0 ; 0x0
c023c8e8: e4813004 str r3, [r1], #4
c023c8ec: e5992050 ldr r2, [r9, #80]
c023c8f0: e589104c str r1, [r9, #76]
c023c8f4: e1520001 cmp r2, r1
c023c8f8: 8afffff9 bhi c023c8e4 <armv7_bootstrap+0x24>
c023c8fc: f57ff04f dsb sy
c023c900: f57ff06f isb sy
-Artturi
