Reverting r76825 and r76828, since they caused clang runtime errors and some build failure involving memset.

llvm-svn: 76838

llvm-svn: 76837

llvm-svn: 76836

llvm-svn: 76835

Derive MDNode from MetadataBase instead of Constant. Emit MDNodes into METADATA_BLOCK in bitcode file.

llvm-svn: 76834

llvm-svn: 76829

out of memory, and also make the default memory manager allocate more memory
when it runs out.

Also, switch function stubs and global data over to using the BumpPtrAllocator.

This makes it so the JIT no longer mmaps (or the equivalent on Windows) 16 MB
of memory, and instead allocates in 512K slabs.  I suspect this size could go
lower, especially on embedded platforms, now that more slabs can be allocated.

llvm-svn: 76828

malloc, so there should be no functional changes to other code.

These changes are necessary since I have plans to use this allocator in the JIT
memory manager, and it needs a special allocator.

I also added some tests which helped me pinpoint some bugs.

llvm-svn: 76825

llvm-svn: 76823

a better solution for it in the future.

llvm-svn: 76818

llvm-svn: 76817

llvm-svn: 76812

llvm-svn: 76811

which stand for no-unsigned-wrap and no-signed-wrap.

llvm-svn: 76810

Reorder if-else branches as suggested by Bill.

llvm-svn: 76808

llvm-svn: 76806

llvm-svn: 76805

llvm-svn: 76803

unintended matches.

llvm-svn: 76802

Constify the key in Mi2IndexMap.

llvm-svn: 76801

llvm-svn: 76799

simplification.
 - NFC

llvm-svn: 76789

llvm-svn: 76787

llvm-svn: 76786

llvm-svn: 76785

llvm-svn: 76782

Put comment printing under asm-verbose.

llvm-svn: 76780

llvm-svn: 76778

Make some changes suggested by Bill and Evan.

llvm-svn: 76775

llvm-svn: 76769

llvm-svn: 76768

llvm-svn: 76767

llvm-svn: 76765

This fixes unittest failure.

llvm-svn: 76764

llvm-svn: 76763

llvm-svn: 76762

llvm-svn: 76761

Derive MDString directly from MetadataBase. 
Introduce new bitcode block to hold metadata.

llvm-svn: 76759

llvm-svn: 76754

llvm-svn: 76751