add a char6 abbrev for bbnames and value names. This represents each character
with 6 bits where possible. This shrinks kc++ from 3324164B to 3183584B. The
old VST was:

Block ID #14 (VALUE_SYMT

add a char6 abbrev for bbnames and value names. This represents each character
with 6 bits where possible. This shrinks kc++ from 3324164B to 3183584B. The
old VST was:

Block ID #14 (VALUE_SYMTAB):
Total Size: 1.26713e+07b/1.58391e+06B/395978W
Average Size: 5403.53b/675.442B/168.86W
% of file: 47.6484

The new one is:

Block ID #14 (VALUE_SYMTAB):
Total Size: 1.15467e+07b/1.44334e+06B/360834W
Average Size: 4923.96b/615.495B/153.874W
% of file: 45.3368

This is 11% smaller than the VST in the bytecode format.

llvm-svn: 36771

show more ...

add an abbreviation for the type symtab, this shrinks the TST from 175197 bits
to 103165 bits:

Old:
Block ID #13 (TYPE_SYMTAB):
Num Instances: 1
Total Size: 175197b/21899.6B/5474.91

add an abbreviation for the type symtab, this shrinks the TST from 175197 bits
to 103165 bits:

Old:
Block ID #13 (TYPE_SYMTAB):
Num Instances: 1
Total Size: 175197b/21899.6B/5474.91W
Average Size: 175197b/21899.6B/5474.91W
% of file: 0.657023
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 0/0
Tot/Avg Records: 255/255
% Abbrev Recs: 0

New:
Block ID #13 (TYPE_SYMTAB):
Num Instances: 1
Total Size: 103165b/12895.6B/3223.91W
Average Size: 103165b/12895.6B/3223.91W
% of file: 0.387937
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 1/1
Tot/Avg Records: 255/255
% Abbrev Recs: 100

llvm-svn: 36769

show more ...

Implement support for globally associating abbrevs with block IDs, which
relieves us from having to emit the abbrevs into each instance of the block.
This shrinks kc.bit from 3368K to 3333K, but will

Implement support for globally associating abbrevs with block IDs, which
relieves us from having to emit the abbrevs into each instance of the block.
This shrinks kc.bit from 3368K to 3333K, but will be a more significant win
once instructions are abbreviated.

The VST went from:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 2345
Total Size: 1.29508e+07b/1.61885e+06B/404713W
Average Size: 5522.73b/690.342B/172.585W
% of file: 48.0645
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 7035/3
Tot/Avg Records: 120924/51.5667
% Abbrev Recs: 100

to:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 2345
Total Size: 1.26713e+07b/1.58391e+06B/395978W
Average Size: 5403.53b/675.442B/168.86W
% of file: 47.5198
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 0/0
Tot/Avg Records: 120924/51.5667
% Abbrev Recs: 100

because we didn't emit the same 3 abbrevs 2345 times :)

llvm-svn: 36767

show more ...

allow the 8-bit abbrev to be used for either bb or other values

llvm-svn: 36761

shave another 150K off of kc++, by using a 7-bit encoding for BB names
where we can. This shrinks kc++'s down to 3368K, with a VST record of:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 234

shave another 150K off of kc++, by using a 7-bit encoding for BB names
where we can. This shrinks kc++'s down to 3368K, with a VST record of:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 2345
Total Size: 1.29508e+07b/1.61885e+06B/404713W
Average Size: 5522.73b/690.342B/172.585W
% of file: 48.0645
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 7035/3
Tot/Avg Records: 120924/51.5667
% Abbrev Recs: 100

Isn't it nice to be able to optimizer bc size without touching the reader? :)

llvm-svn: 36759

show more ...

where possible, encode symtab names with 7 bits per char instead of 8. This
shaves 110K off kc++ to 3514K. Before:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 2345
Total Size: 1.5

where possible, encode symtab names with 7 bits per char instead of 8. This
shaves 110K off kc++ to 3514K. Before:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 2345
Total Size: 1.50425e+07b/1.88031e+06B/470077W
Average Size: 6414.69b/801.837B/200.459W
% of file: 51.8057
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 2345/1
Tot/Avg Records: 120924/51.5667
% Abbrev Recs: 85.1791

after:

Block ID #14 (VALUE_SYMTAB):
Num Instances: 2345
Total Size: 1.41229e+07b/1.76536e+06B/441341W
Average Size: 6022.56b/752.82B/188.205W
% of file: 50.2295
Tot/Avg SubBlocks: 0/0
Tot/Avg Abbrevs: 4690/2
Tot/Avg Records: 120924/51.5667
% Abbrev Recs: 85.1791

llvm-svn: 36758

show more ...

Encode all value symtab strings as arrays of 8-bit fixed width integers,
instead of the default inefficient encoding. This shrinks kc++ from 4134K
to 3629K

llvm-svn: 36755

eliminate internal length fields from record. Records already know their
total length

llvm-svn: 36752

stub out creation of BLOCKINFO_BLOCK

llvm-svn: 36749

fix encoding of invoke instructions. kc++ now round trips

llvm-svn: 36737

encode and read param attrs along with function type. WE can now roundtrip Olden/voronoi loslessly

llvm-svn: 36735

fix a bug encoding param attrs

llvm-svn: 36730

add writer support for param attrs

llvm-svn: 36724

trivial scaffolding for param attrs

llvm-svn: 36720

Encoding calling conv info in call/invoke instrs, tree add now round trips completely

llvm-svn: 36707

don't bother encoding # varargs

llvm-svn: 36705

fix encoding of BB names in the symtab

llvm-svn: 36704

add reader logic for terminator instrs.

llvm-svn: 36642

use the correct code for binop instrs

llvm-svn: 36639

fix build with non-buggy compilers

llvm-svn: 36621

write the symbol table for function bodies

llvm-svn: 36610

encode all of the instructions.

llvm-svn: 36609

Implement visibility checking during linking. Also implement protected
visibility support for bitcode.

llvm-svn: 36577

Fix this to use the right block ID

llvm-svn: 36550

moved Writer.cpp -> BitcodeWriter.cpp to make it more unique in the tree.

llvm-svn: 36549