http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46590
--- Comment #40 from Richard Biener <rguenth at gcc dot gnu.org> ---
On the full testcase tree LIM uses too much memory (I didn't merge some of
the patches that only benefit this kind of testcase ... bah). Without LIM
we use around 1GB of memory at -O2 and
df reaching defs : 19.42 (14%) usr 35.49 (82%) sys 55.13 (30%) wall
0 kB ( 0%) ggc
alias stmt walking : 34.25 (25%) usr 0.47 ( 1%) sys 34.76 (19%) wall
1451 kB ( 0%) ggc
tree CFG cleanup : 7.75 ( 6%) usr 0.04 ( 0%) sys 7.73 ( 4%) wall
5002 kB ( 1%) ggc
tree PTA : 22.32 (16%) usr 0.10 ( 0%) sys 22.43 (12%) wall
7882 kB ( 1%) ggc
TOTAL : 137.59 43.38 180.98
866898 kB
-O3 is similar.
I have a patch for the memory usage issue.
