kito wrote:
Hello everybody:
I want to count the number of spilling.
I have try to compile file with -fdump-rtl-ira
And then use `grep Spilling *.ira | wc -l`
Does it's right way to get the number of spilling?
That is a wrong way to find real spills. Lines with Spilling is
actually reported by reload pass and it means only that reload is
checking constraints for insns (it is not real spills). Reload pass can
do several such iterations. The more hard registers usages, the more
iterations are usually needed. Therefore you are getting that lines
with 'Spilling' have -O1 < -O2 < -O3.
I am confuse about the result data because the number of spilling is
-O1 < -O2 < -O3.
Benchmark : SPEC2000
target: arm-linux-elf
gcc version : 4.4.0
-O1 -O2 -O3
164.zip 1338 1407 3033
181.mcf 305 362 603
186.crafty 4888 7159 7878
