http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38474
--- Comment #60 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> 2012-06-15 15:26:20 UTC --- (In reply to comment #59) > There should be no compile performance problems in expand anymore. > The alias stmt walker as used from IPA remains a problem, though. Thanks... expand is now indeed essentially gone from the timing report. > gfortran -ftime-report -ffree-line-length-512 -g -c testcase.f90 Execution times (seconds) phase setup : 0.02 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall 243 kB ( 0%) ggc phase parsing : 3.57 ( 9%) usr 0.06 ( 7%) sys 3.63 ( 9%) wall 47592 kB ( 7%) ggc phase cgraph : 36.49 (91%) usr 0.86 (93%) sys 37.34 (91%) wall 647436 kB (93%) ggc phase generate : 36.50 (91%) usr 0.86 (93%) sys 37.36 (91%) wall 647838 kB (93%) ggc garbage collection : 1.04 ( 3%) usr 0.00 ( 0%) sys 1.04 ( 3%) wall 0 kB ( 0%) ggc callgraph construction : 0.19 ( 0%) usr 0.00 ( 0%) sys 0.19 ( 0%) wall 15909 kB ( 2%) ggc callgraph optimization : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.02 ( 0%) wall 201 kB ( 0%) ggc cfg construction : 0.08 ( 0%) usr 0.00 ( 0%) sys 0.08 ( 0%) wall 7 kB ( 0%) ggc cfg cleanup : 0.03 ( 0%) usr 0.00 ( 0%) sys 0.03 ( 0%) wall 0 kB ( 0%) ggc CFG verifier : 1.26 ( 3%) usr 0.00 ( 0%) sys 1.25 ( 3%) wall 0 kB ( 0%) ggc trivially dead code : 0.43 ( 1%) usr 0.00 ( 0%) sys 0.41 ( 1%) wall 0 kB ( 0%) ggc df scan insns : 0.98 ( 2%) usr 0.24 (26%) sys 1.24 ( 3%) wall 11 kB ( 0%) ggc df live regs : 0.58 ( 1%) usr 0.01 ( 1%) sys 0.57 ( 1%) wall 0 kB ( 0%) ggc df reg dead/unused notes: 0.43 ( 1%) usr 0.01 ( 1%) sys 0.45 ( 1%) wall 19416 kB ( 3%) ggc register information : 0.18 ( 0%) usr 0.00 ( 0%) sys 0.18 ( 0%) wall 0 kB ( 0%) ggc alias analysis : 0.15 ( 0%) usr 0.00 ( 0%) sys 0.14 ( 0%) wall 8337 kB ( 1%) ggc rebuild jump labels : 0.22 ( 1%) usr 0.00 ( 0%) sys 0.21 ( 1%) wall 0 kB ( 0%) ggc parser (global) : 3.57 ( 9%) usr 0.06 ( 7%) sys 3.63 ( 9%) wall 47587 kB ( 7%) ggc inline heuristics : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.08 ( 0%) wall 54 kB ( 0%) ggc tree gimplify : 0.51 ( 1%) usr 0.01 ( 1%) sys 0.51 ( 1%) wall 26304 kB ( 4%) ggc tree eh : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall 39 kB ( 0%) ggc tree CFG construction : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall 190 kB ( 0%) ggc tree CFG cleanup : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall 0 kB ( 0%) ggc tree find ref. vars : 0.04 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall 3263 kB ( 0%) ggc tree PHI insertion : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall 0 kB ( 0%) ggc tree SSA other : 0.01 ( 0%) usr 0.01 ( 1%) sys 0.02 ( 0%) wall 18 kB ( 0%) ggc tree operand scan : 0.03 ( 0%) usr 0.03 ( 3%) sys 0.05 ( 0%) wall 118 kB ( 0%) ggc tree SSA verifier : 0.10 ( 0%) usr 0.00 ( 0%) sys 0.10 ( 0%) wall 0 kB ( 0%) ggc tree STMT verifier : 0.56 ( 1%) usr 0.05 ( 5%) sys 0.63 ( 2%) wall 0 kB ( 0%) ggc callgraph verifier : 0.25 ( 1%) usr 0.00 ( 0%) sys 0.27 ( 1%) wall 0 kB ( 0%) ggc out of ssa : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall 0 kB ( 0%) ggc expand vars : 1.02 ( 3%) usr 0.02 ( 2%) sys 1.03 ( 3%) wall 10086 kB ( 1%) ggc expand : 2.03 ( 5%) usr 0.12 (13%) sys 2.18 ( 5%) wall 249774 kB (36%) ggc post expand cleanups : 0.14 ( 0%) usr 0.01 ( 1%) sys 0.14 ( 0%) wall 1744 kB ( 0%) ggc integrated RA : 10.75 (27%) usr 0.15 (16%) sys 10.93 (27%) wall 128826 kB (19%) ggc reload : 5.56 (14%) usr 0.16 (17%) sys 5.77 (14%) wall 123587 kB (18%) ggc thread pro- & epilogue : 2.65 ( 7%) usr 0.00 ( 0%) sys 2.64 ( 6%) wall 198 kB ( 0%) ggc machine dep reorg : 0.06 ( 0%) usr 0.00 ( 0%) sys 0.07 ( 0%) wall 0 kB ( 0%) ggc final : 3.11 ( 8%) usr 0.04 ( 4%) sys 3.15 ( 8%) wall 7227 kB ( 1%) ggc symout : 0.03 ( 0%) usr 0.00 ( 0%) sys 0.04 ( 0%) wall 4914 kB ( 1%) ggc rest of compilation : 2.46 ( 6%) usr 0.00 ( 0%) sys 2.39 ( 6%) wall 47578 kB ( 7%) ggc unaccounted todo : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall 0 kB ( 0%) ggc verify RTL sharing : 1.49 ( 4%) usr 0.00 ( 0%) sys 1.48 ( 4%) wall 0 kB ( 0%) ggc TOTAL : 40.09 0.92 41.02 695674 kB