diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/optc-save-gen.awk | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/gcc/optc-save-gen.awk b/gcc/optc-save-gen.awk index 49065ce..2b8557f 100644 --- a/gcc/optc-save-gen.awk +++ b/gcc/optc-save-gen.awk @@ -1291,7 +1291,22 @@ for (i = 0; i < n_opts; i++) { var_opt_val_type[n_opt_val] = otype; var_opt_val[n_opt_val] = "x_" name; var_opt_hash[n_opt_val] = flag_set_p("Optimization", flags[i]); - var_opt_init[n_opt_val] = opt_args("Init", flags[i]); + + # If applicable, optimize streaming for the common case that + # the current value is unchanged from the 'Init' value: + # XOR-encode it so that we stream value zero. + # Not handling non-parameters as those really generally don't + # have large initializers. + # Not handling enums as we don't know if '(enum ...) 10' is + # even valid (see synthesized 'if' conditionals below). + if (flag_set_p("Param", flags[i]) \ + && !(otype ~ "^enum ")) { + # Those without 'Init' are zero-initialized and thus + # already encoded ideally. + init = opt_args("Init", flags[i]) + var_opt_optimize_init[n_opt_val] = init; + } + n_opt_val++; } } @@ -1369,9 +1384,10 @@ for (i = 0; i < n_opt_val; i++) { } else { sgn = "int"; } - if (name ~ "^x_param" && !(otype ~ "^enum ") && var_opt_init[i]) { - print " if (" var_opt_init[i] " > (" var_opt_val_type[i] ") 10)"; - print " bp_pack_var_len_" sgn " (bp, ptr->" name" ^ " var_opt_init[i] ");"; + # If applicable, encode the streamed value. + if (var_opt_optimize_init[i]) { + print " if (" var_opt_optimize_init[i] " > (" var_opt_val_type[i] ") 10)"; + print " bp_pack_var_len_" sgn " (bp, ptr->" name" ^ " var_opt_optimize_init[i] ");"; print " else"; print " bp_pack_var_len_" sgn " (bp, ptr->" name");"; } else { @@ -1405,9 +1421,10 @@ for (i = 0; i < n_opt_val; i++) { sgn = "int"; } print " ptr->" name" = (" var_opt_val_type[i] ") bp_unpack_var_len_" sgn " (bp);"; - if (name ~ "^x_param" && !(otype ~ "^enum ") && var_opt_init[i]) { - print " if (" var_opt_init[i] " > (" var_opt_val_type[i] ") 10)"; - print " ptr->" name" ^= " var_opt_init[i] ";"; + # If applicable, decode the streamed value. + if (var_opt_optimize_init[i]) { + print " if (" var_opt_optimize_init[i] " > (" var_opt_val_type[i] ") 10)"; + print " ptr->" name" ^= " var_opt_optimize_init[i] ";"; } } } |