beam_makeops: Save some memory by making loader tables 'const'

Before:

$ size bin/x86_64-unknown-linux-gnu/beam.smp
   text	   data	    bss	    dec	    hex	filename
3080982	 188369	 158472	3427823	 344def	bin/x86_64-unknown-linux-gnu/beam.smp

After:

$ size bin/x86_64-unknown-linux-gnu/beam.smp
   text	   data	    bss	    dec	    hex	filename
3164694	 104657	 158472	3427823	 344def	bin/x86_64-unknown-linux-gnu/beam.smp

1 files changed, 7 insertions, 7 deletions

diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops
index acc0084145..9813142585 100755
--- a/erts/emulator/utils/beam_makeops
+++ b/erts/emulator/utils/beam_makeops
@@ -475,7 +475,7 @@ sub emulator_output {
     print '#include "beam_load.h"', "\n";
     print "\n";
 
-    print "char tag_to_letter[] = {\n  ";
+    print "const char tag_to_letter[] = {\n  ";
     for ($i = 0; $i < length($genop_types); $i++) {
 	print "'$tag_type[$i]', ";
     }
@@ -489,7 +489,7 @@ sub emulator_output {
     # Generate code for specific ops.
     #
     my($spec_opnum) = 0;
-    print "OpEntry opc[] = {\n";
+    print "const OpEntry opc[] = {\n";
     foreach $key (sort keys %specific_op) {
 	$gen_to_spec{$key} = $spec_opnum;
 	$num_specific{$key} = @{$specific_op{$key}};
@@ -572,7 +572,7 @@ sub emulator_output {
 	}
     }
     print "};\n\n";
-    print "int num_instructions = $spec_opnum;\n\n";
+    print "const int num_instructions = $spec_opnum;\n\n";
 
     #
     # Print the array for instruction counts.
@@ -593,7 +593,7 @@ sub emulator_output {
     # Print the generic instruction table.
     #
 
-    print "GenOpEntry gen_opc[] = {\n";
+    print "const GenOpEntry gen_opc[] = {\n";
     for ($i = 0; $i < @gen_opname; $i++) {
 	if ($i == $num_file_opcodes) {
 	    print "\n/*\n * Internal generic instructions.\n */\n\n";
@@ -687,8 +687,8 @@ sub emulator_output {
     print "#define TE_MAX_VARS $te_max_vars\n";
     print "\n";
 
-    print "extern char tag_to_letter[];\n";
-    print "extern Uint op_transform[];\n";
+    print "extern const char tag_to_letter[];\n";
+    print "extern const Uint op_transform[];\n";
     print "\n";
 
     for ($i = 0; $i < @op_to_name; $i++) {
@@ -1426,7 +1426,7 @@ sub tr_gen {
     # Print the generated transformation engine.
     #
     my($offset) = 0;
-    print "Uint op_transform[] = {\n";
+    print "const Uint op_transform[] = {\n";
     foreach $key (sort keys %gen_transform) {
 	$gen_transform_offset{$key} = $offset;
 	my @instr = @{$gen_transform{$key}};