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

a better solution for it in the future.

llvm-svn: 76818

llvm-svn: 76817

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: 76803

Constify the key in Mi2IndexMap.

llvm-svn: 76801

llvm-svn: 76799

simplification.
 - NFC

llvm-svn: 76789

llvm-svn: 76787

llvm-svn: 76786

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: 76767

llvm-svn: 76765

This fixes unittest failure.

llvm-svn: 76764

llvm-svn: 76762

llvm-svn: 76761

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

llvm-svn: 76759

llvm-svn: 76750

llvm-svn: 76736

be placed in the standard data / bss sections.

llvm-svn: 76735

on linux platforms.  The binutils assembler does not
recognize the "s" flag, see for example
http://sourceware.org/binutils/docs/as/Section.html 

llvm-svn: 76733

functions with a single use; eliminating the single use may eliminate 
the function from the current module, but usually doesn't eliminate 
it from the final program.

llvm-svn: 76730

llvm-svn: 76729

Add R12 to the list of registers clobbered by 16-bit Thumb calls as a pre-caution. r12 could be live once we have mixed 32-bit and 16-bit instructions.

llvm-svn: 76728

llvm-svn: 76727

llvm-svn: 76725

llvm-svn: 76713

assembler / disassembler.

llvm-svn: 76712

llvm-svn: 76711

only caller.

llvm-svn: 76710

updating a mips testcase to expect it.

llvm-svn: 76707

llvm-svn: 76706

a new getSectionForMergableConstant hook.  This removes one dependence
of TAI on Type, and provides the hook with enough info to make the 
right decision based on whether the global has relocations etc.

llvm-svn: 76705

Let each target determines whether a machine instruction is dead. If true, that allows late codeine passes to delete it.

This is considered a workaround. The problem is some targets are not modeling side effects correctly. PPC is apparently one of those. This patch allows ppc llvm-gcc to bootstrap on Darwin. Once we find out which instruction definitions are wrong, we can remove the PPCInstrInfo workaround.

llvm-svn: 76703