http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50022
Greta Yorsh <Greta.Yorsh at arm dot com> changed:
What |Removed |Added
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CC| |Greta.Yorsh at arm dot com
--- Comment #2 from Greta Yorsh <Greta.Yorsh at arm dot com> 2011-08-09
15:55:46 UTC ---
Here is a small test case:
long long glob;
void bar(int val)
{
glob = (val >= 0 && val <= 2147483647 ? val : 2147483647) * 1000000L;
}
I reproduced the bug with the flags
arm-none-eabi-gcc -c -O1 -mcpu=cortex-a8 -mthumb t1.c
but not with -O0 and not with -mcpu=cortex-a9.
By the way, changing the large numbers to smaller or removing conditions makes
the error message go away.
The error seems to be generating K+1 instructions instead of K in the IT block.
bar:
cmp r0, #0
itttt ge
movwge r3, #16960
movtge r3, 15
mulge r0, r3, r0
movge r2, r0
ite ge
asrge r3, r2, #31
adrlt r3, .L4
ldrdlt r2, [r3]
movw r1, #:lower16:glob
movt r1, #:upper16:glob
strd r2, [r1]
bx lr
-- Greta
