https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119389
--- Comment #1 from Filip Kastl <pheeck at gcc dot gnu.org> --- This is how it looks on r15-6120-g56946c801a7cf3a831a11870b7e11ba08bf9bd87 > gcc bugreport.c -O1 -c -ftime-report Time variable wall GGC phase setup : 0.00 ( 0%) 1898k ( 2%) phase parsing : 0.09 ( 2%) 13M ( 15%) phase opt and generate : 4.07 ( 98%) 72M ( 83%) callgraph construction : 0.01 ( 0%) 4096k ( 5%) callgraph functions expansion : 3.15 ( 76%) 60M ( 69%) callgraph ipa passes : 0.88 ( 21%) 2275k ( 3%) ipa function summary : 0.01 ( 0%) 6712 ( 0%) ipa modref : 0.13 ( 3%) 400 ( 0%) cfg construction : 0.01 ( 0%) 3204k ( 4%) cfg cleanup : 0.12 ( 3%) 2554k ( 3%) trivially dead code : 0.02 ( 0%) 0 ( 0%) df scan insns : 0.01 ( 0%) 48 ( 0%) df live regs : 0.11 ( 3%) 0 ( 0%) df live&initialized regs : 0.04 ( 1%) 0 ( 0%) df reg dead/unused notes : 0.08 ( 2%) 1347k ( 2%) register information : 0.01 ( 0%) 0 ( 0%) alias analysis : 0.04 ( 1%) 1281k ( 1%) rebuild jump labels : 0.01 ( 0%) 0 ( 0%) preprocessing : 0.02 ( 1%) 4774k ( 5%) lexical analysis : 0.01 ( 0%) 0 ( 0%) parser function body : 0.05 ( 1%) 8457k ( 9%) inline parameters : 0.03 ( 1%) 8912 ( 0%) tree gimplify : 0.01 ( 0%) 2318k ( 3%) tree CFG construction : 0.01 ( 0%) 3836k ( 4%) tree CFG cleanup : 0.03 ( 1%) 0 ( 0%) tree copy propagation : 0.01 ( 0%) 0 ( 0%) tree PTA : 0.02 ( 0%) 128 ( 0%) tree SSA rewrite : 0.01 ( 0%) 1469k ( 2%) tree operand scan : 0.01 ( 0%) 949k ( 1%) dominator optimization : 1.05 ( 25%) 3067k ( 3%) tree CCP : 0.05 ( 1%) 56 ( 0%) tree FRE : 1.01 ( 24%) 496 ( 0%) tree forward propagate : 0.02 ( 0%) 0 ( 0%) tree SSA uncprop : 0.01 ( 0%) 0 ( 0%) tree switch lowering : 0.01 ( 0%) 7244k ( 8%) tree modref : 0.22 ( 5%) 480 ( 0%) dominance computation : 0.11 ( 3%) 0 ( 0%) out of ssa : 0.01 ( 0%) 360 ( 0%) expand : 0.02 ( 1%) 14M ( 17%) post expand cleanups : 0.01 ( 0%) 480 ( 0%) forward prop : 0.10 ( 2%) 0 ( 0%) CSE : 0.04 ( 1%) 0 ( 0%) dead code elimination : 0.02 ( 1%) 0 ( 0%) dead store elim1 : 0.01 ( 0%) 559k ( 1%) dead store elim2 : 0.02 ( 0%) 468k ( 1%) loop init : 0.02 ( 1%) 4552 ( 0%) branch prediction : 0.01 ( 0%) 104 ( 0%) combiner : 0.03 ( 1%) 325k ( 0%) if-conversion : 0.09 ( 2%) 8771k ( 10%) integrated RA : 0.10 ( 2%) 7146k ( 8%) LRA non-specific : 0.05 ( 1%) 56 ( 0%) LRA virtuals elimination : 0.01 ( 0%) 0 ( 0%) LRA reload inheritance : 0.01 ( 0%) 0 ( 0%) LRA create live ranges : 0.02 ( 0%) 0 ( 0%) reload CSE regs : 0.03 ( 1%) 883k ( 1%) thread pro- & epilogue : 0.01 ( 0%) 880 ( 0%) if-conversion 2 : 0.01 ( 0%) 0 ( 0%) combine stack adjustments : 0.01 ( 0%) 0 ( 0%) hard reg cprop : 0.03 ( 1%) 0 ( 0%) reorder blocks : 0.03 ( 1%) 1082k ( 1%) shorten branches : 0.01 ( 0%) 0 ( 0%) final : 0.03 ( 1%) 5189k ( 6%) straight-line strength reduction : 0.01 ( 0%) 0 ( 0%) initialize rtl : 0.01 ( 0%) 12k ( 0%) access analysis : 0.01 ( 0%) 0 ( 0%) rest of compilation : 0.06 ( 1%) 1367k ( 2%) remove unused locals : 0.01 ( 0%) 0 ( 0%) TOTAL : 4.16 87M I'll try to bisect.
