Emit & read more compressed bytecode by not emitting a bytecodeblock for
each basic block in function. Instead, just emit a stream of instructions,
chopping up basic blocks based on when we find terminator instructions. This
saves a fairly substantial chunk of bytecode space. In stripped, sample
cases, for example, we get this reduction in size:
197.parser: 163036 -> 137180: 18.8% reduction
254.gap : 844936 -> 689392: 22.6%
255.vortex: 621724 -> 528444: 17.7%
...
Not bad for something this simple. :) Note that this doesn't require a new
bytecode version number at all, though version 1.1 should not need to support
the old format.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10280 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bytecode/Reader/ReaderInternals.h b/lib/Bytecode/Reader/ReaderInternals.h
index aea45c2..fd0a1ed 100644
--- a/lib/Bytecode/Reader/ReaderInternals.h
+++ b/lib/Bytecode/Reader/ReaderInternals.h
@@ -162,7 +162,9 @@
BasicBlock *ParseBasicBlock(const unsigned char *&Buf,
const unsigned char *End,
unsigned BlockNo);
-
+ unsigned ParseInstructionList(Function *F, const unsigned char *&Buf,
+ const unsigned char *EndBuf);
+
void ParseInstruction(const unsigned char *&Buf, const unsigned char *End,
std::vector<unsigned> &Args, BasicBlock *BB);