Add option to set thresold and support for riscv

1 files changed, 2 insertions, 0 deletions

diff --git a/driver/Driver.ml b/driver/Driver.ml
index 5a8c7f2c..fa187f26 100644
--- a/driver/Driver.ml
+++ b/driver/Driver.ml
@@ -211,6 +211,7 @@ Processing options:
   -fprepass      Perform prepass scheduling (only on some architectures) [on]
   -fprepass= <optim> Perform postpass scheduling with the specified optimization [list]
                    (<optim>=list: list scheduling, <optim>=revlist: reverse list scheduling, <optim>=regpres: list scheduling aware of register pressure, <optim>=zigzag: zigzag scheduling, <optim>=ilp: ILP, <optim>=greedy: just packing bundles)
+  -regpres-threshold n   With `-fprepass= regpres`, set threshold value for number of free registers before trying to decrease register pressure
   -fpostpass     Perform postpass scheduling (only for K1 architecture) [on] 
   -fpostpass= <optim> Perform postpass scheduling with the specified optimization [list]
                    (<optim>=list: list scheduling, <optim>=ilp: ILP, <optim>=greedy: just packing bundles)
@@ -342,6 +343,7 @@ let cmdline_actions =
   Exact "-fprofile-use=", String (fun s -> Profilingaux.load_profiling_info s);
   Exact "-finline-auto-threshold", Integer (fun n -> option_inline_auto_threshold := n);
   Exact "-debug-compcert", Integer (fun n -> option_debug_compcert := n);
+  Exact "-regpres-threshold", Integer (fun n -> option_regpres_threshold := n);
   Exact "-fsmall-data", Integer(fun n -> option_small_data := n);
   Exact "-fsmall-const", Integer(fun n -> option_small_const := n);
   Exact "-ffloat-const-prop", Integer(fun n -> option_ffloatconstprop := n);