Regression in -fregs-graph performance
Likely due to a bad interaction with the new code generator, see #7192 (closed).
-fregs-graph used to be on by default with -O2, but is currently off due to this issue.
Results courtesy of @tibbe:
HEAD vs HEAD with -fregs-graph:
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Program Size Allocs Runtime Elapsed TotalMem
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anna +0.1% +0.0% 0.08 0.08 +0.0%
ansi +0.0% +0.0% 0.00 0.00 +0.0%
atom +0.0% +0.0% +0.0% -0.8% +0.0%
awards -0.0% +0.0% 0.00 0.00 +0.0%
banner -0.0% +0.0% 0.00 0.00 +0.0%
bernouilli +0.0% +0.0% 0.12 0.12 +0.0%
binary-trees +0.0% +0.0% +0.0% +0.0% +0.0%
boyer -0.0% +0.0% 0.04 0.04 +0.0%
boyer2 -0.0% +0.0% 0.01 0.01 +0.0%
bspt -0.0% +0.0% 0.02 0.02 +0.0%
cacheprof +0.0% +0.0% -3.1% -3.1% +0.0%
calendar -0.0% +0.0% 0.00 0.00 +0.0%
cichelli +0.0% +0.0% 0.05 0.05 +3.0%
circsim +0.0% +0.0% -0.3% -0.3% +0.0%
clausify -0.0% +0.0% 0.03 0.03 +0.0%
comp_lab_zift -0.0% +0.0% 0.14 0.14 +0.0%
compress +0.0% +0.0% 0.11 0.11 +0.0%
compress2 +0.0% +0.0% 0.14 0.14 +0.0%
constraints +0.0% +0.0% -1.4% -1.4% +0.0%
cryptarithm1 +0.0% +0.0% +1.6% +1.0% +0.0%
cryptarithm2 +0.0% +0.0% 0.01 0.01 +0.0%
cse +0.0% +0.0% 0.00 0.00 +0.0%
eliza -0.0% +0.0% 0.00 0.00 +0.0%
event +0.0% +0.0% 0.10 0.10 +0.0%
exp3_8 +0.0% +0.0% 0.14 0.14 +0.0%
expert +0.0% +0.0% 0.00 0.00 +0.0%
fannkuch-redux +0.0% +0.0% +10.6% +10.4% +0.0%
fasta -0.0% +0.0% -0.6% -0.6% +0.0%
fem +0.0% +0.0% 0.03 0.03 +0.0%
fft -0.0% +0.0% 0.03 0.03 +0.0%
fft2 +0.0% +0.0% 0.04 0.04 +0.0%
fibheaps -0.0% +0.0% 0.03 0.03 +0.0%
fish +0.0% +0.0% 0.01 0.01 +0.0%
fluid +0.0% +0.0% 0.01 0.01 +0.0%
fulsom +0.1% +0.0% -5.9% -5.9% -5.3%
gamteb +0.0% +0.0% 0.04 0.04 +0.0%
gcd +0.0% +0.0% 0.03 0.03 +0.0%
gen_regexps +0.0% +0.0% 0.00 0.00 +0.0%
genfft +0.0% +0.0% 0.03 0.03 +0.0%
gg +0.0% +0.0% 0.02 0.02 +0.0%
grep +0.1% +0.0% 0.00 0.00 +0.0%
hidden +0.0% +0.0% +3.4% +2.7% +0.0%
hpg +0.0% +0.0% 0.10 0.10 +0.0%
ida -0.0% +0.0% 0.06 0.06 +0.0%
infer +0.0% +0.0% 0.05 0.05 +0.0%
integer -0.0% +0.0% +3.0% +2.9% +0.0%
integrate +0.0% +0.0% 0.13 0.13 +0.0%
k-nucleotide +0.4% +0.0% +3.4% +3.5% +0.0%
kahan +0.0% +0.0% 0.18 0.18 +0.0%
knights -0.1% +0.0% 0.01 0.01 +0.0%
lcss +0.0% +0.0% +0.7% +0.7% +0.0%
life -0.0% +0.0% 0.16 0.16 +0.0%
lift +0.0% +0.0% 0.00 0.00 +0.0%
listcompr -0.0% +0.0% 0.06 0.06 +0.0%
listcopy -0.0% +0.0% 0.06 0.06 +0.0%
maillist -0.0% +0.0% 0.04 0.04 -11.2%
mandel +0.0% +0.0% 0.05 0.05 +0.0%
mandel2 -0.0% +0.0% 0.00 0.00 +0.0%
minimax +0.0% +0.0% 0.00 0.00 +0.0%
mkhprog +0.0% +0.0% 0.00 0.00 +0.0%
multiplier -0.0% +0.0% 0.08 0.08 +0.0%
n-body -0.0% +0.0% +28.2% +28.2% +0.0%
nucleic2 +0.0% +0.0% 0.05 0.05 +0.0%
para -0.1% +0.0% +1.0% +1.0% +0.0%
paraffins -0.0% +0.0% 0.08 0.08 +0.0%
parser +0.0% +0.0% 0.03 0.03 +0.0%
parstof -0.0% +0.0% 0.00 0.00 +0.0%
pic -0.0% +0.0% 0.00 0.00 +0.0%
pidigits -0.0% +0.0% -0.6% +0.0% +0.0%
power +0.0% +0.0% +1.9% +1.9% +0.0%
pretty +0.0% +0.0% 0.00 0.00 +0.0%
primes -0.0% +0.0% 0.05 0.05 +0.0%
primetest -0.0% +0.0% 0.07 0.07 +0.0%
prolog +0.0% +0.0% 0.00 0.00 +0.0%
puzzle -0.0% +0.0% 0.10 0.10 +0.0%
queens +0.0% +0.0% 0.02 0.02 +0.0%
reptile +0.0% +0.0% 0.02 0.02 +0.0%
reverse-complem -0.0% +0.0% 0.08 0.08 +0.0%
rewrite +0.0% +0.0% 0.02 0.02 +0.0%
rfib +0.0% +0.0% 0.02 0.02 +0.0%
rsa +0.0% +0.0% 0.03 0.03 +0.0%
scc -0.0% +0.0% 0.00 0.00 +0.0%
sched -0.0% +0.0% 0.02 0.02 +0.0%
scs -0.0% +0.0% -1.1% -0.5% +0.0%
simple -0.1% +0.0% 0.16 0.16 +0.0%
solid -0.0% +0.0% 0.10 0.10 +0.0%
sorting -0.0% +0.0% 0.00 0.00 +0.0%
spectral-norm -0.0% +0.0% +0.0% +0.0% +0.0%
sphere +0.1% +0.0% 0.03 0.03 +0.0%
symalg -0.0% +0.0% 0.01 0.01 +0.0%
tak +0.0% +0.0% 0.01 0.01 +0.0%
transform -0.0% +0.0% +0.0% +0.0% +0.0%
treejoin +0.0% +0.0% 0.15 0.15 +0.0%
typecheck +0.0% +0.0% 0.15 0.15 +0.0%
veritas +0.1% +0.0% 0.00 0.00 +0.0%
wang +0.0% +0.0% 0.08 0.08 +0.0%
wave4main +0.0% +0.0% 0.19 0.19 +0.0%
wheel-sieve1 -0.0% +0.0% -0.8% -0.8% +0.0%
wheel-sieve2 -0.0% +0.0% 0.13 0.13 +0.0%
x2n1 -0.0% +0.0% 0.01 0.01 +0.0%
--------------------------------------------------------------------------------
Min -0.1% +0.0% -5.9% -5.9% -11.2%
Max +0.4% +0.0% +28.2% +28.2% +3.0%
Geometric Mean +0.0% -0.0% +1.7% +1.7% -0.1%Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.6.2 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | high |
| Resolution | Unresolved |
| Component | Compiler (NCG) |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | #7192 (closed) |
| Blocking | |
| CC | benl, tibbe |
| Operating system | |
| Architecture |