+ftree-ccp
+Common Report Var(flag_tree_ccp)
+Enable SSA-CCP optimization on trees
+
+ftree-store-ccp
+Common Report Var(flag_tree_store_ccp)
+Enable SSA-CCP optimization for stores and loads
+
+ftree-ch
+Common Report Var(flag_tree_ch)
+Enable loop header copying on trees
+
+ftree-combine-temps
+Common Report Var(flag_tree_combine_temps)
+Coalesce memory temporaries in the SSA->normal pass
+
+ftree-copyrename
+Common Report Var(flag_tree_copyrename)
+Replace SSA temporaries with better names in copies
+
+ftree-copy-prop
+Common Report Var(flag_tree_copy_prop)
+Enable copy propagation on trees
+
+ftree-store-copy-prop
+Common Report Var(flag_tree_store_copy_prop)
+Enable copy propagation for stores and loads
+
+ftree-dce
+Common Report Var(flag_tree_dce)
+Enable SSA dead code elimination optimization on trees
+
+ftree-dominator-opts
+Common Report Var(flag_tree_dom)
+Enable dominator optimizations
+
+ftree-dse
+Common Report Var(flag_tree_dse)
+Enable dead store elimination
+
+ftree-fre
+Common Report Var(flag_tree_fre)
+Enable Full Redundancy Elimination (FRE) on trees
+
+ftree-loop-im
+Common Report Var(flag_tree_loop_im) Init(1)
+Enable loop invariant motion on trees
+
+ftree-loop-linear
+Common Report Var(flag_tree_loop_linear)
+Enable linear loop transforms on trees
+
+ftree-loop-ivcanon
+Common Report Var(flag_tree_loop_ivcanon) Init(1)
+Create canonical induction variables in loops
+
+ftree-loop-optimize
+Common Report Var(flag_tree_loop_optimize) Init(1)
+Enable loop optimizations on tree level
+
+ftree-pre
+Common Report Var(flag_tree_pre)
+Enable SSA-PRE optimization on trees
+
+ftree-salias
+Common Report Var(flag_tree_salias)
+Perform structural alias analysis
+
+ftree-sink
+Common Report Var(flag_tree_sink)
+Enable SSA code sinking on trees
+
+ftree-sra
+Common Report Var(flag_tree_sra)
+Perform scalar replacement of aggregates
+
+ftree-ter
+Common Report Var(flag_tree_ter)
+Replace temporary expressions in the SSA->normal pass
+
+ftree-lrs
+Common Report Var(flag_tree_live_range_split)
+Perform live range splitting during the SSA->normal pass
+
+ftree-vrp
+Common Report Var(flag_tree_vrp) Init(0)
+Perform Value Range Propagation on trees
+