If we are emitting COPY instructions for the REG_SEQUENCE, make sure the kill
flag goes on the last COPY. Otherwise we may be using a killed register.

<rdar://problem/8287792>

llvm-svn: 110589

llvm-svn: 110587

llvm-svn: 110586

Change -prefer-32bit-thumb to attribute -mattr=+32bit instead to disable more 32-bit to 16-bit optimizations.

llvm-svn: 110584

llvm-svn: 110582

llvm-svn: 110580

llvm-svn: 110579

llvm-svn: 110576

Discovered by Microsoft Visual Studio 2010 Code Analysis.

llvm-svn: 110575

was built with -static.

llvm-svn: 110564

llvm-svn: 110543

llvm-svn: 110541

relatively expensive comparison analyzer on each instruction. Also rename the
comparison analyzer method to something more in line with what it actually does.

This pass is will eventually be folded into the Machine CSE pass.

llvm-svn: 110539

llvm-svn: 110538

llvm-svn: 110527

llvm-svn: 110518

llvm-svn: 110516

llvm-svn: 110505

llvm-svn: 110504

llvm-svn: 110499

llvm-svn: 110496

out of PassManager.cpp and into Core.cpp with the rest of the C binding code.

llvm-svn: 110494

llvm-svn: 110493

form of CMPSD (etc.)  Matching a 128-bit memory
operand is wrong, the instruction uses only 64 bits
(same as ADDSD etc.)  8193553.

llvm-svn: 110491

llvm-svn: 110489

necessary.

Sometimes, live range splitting doesn't shrink the current interval, but simply
changes some instructions to use a new interval. That makes the original more
suitable for spilling. In this case, we don't need to duplicate the original.

llvm-svn: 110481

llvm-svn: 110480

instead, as an example of what this looks like.

llvm-svn: 110478

llvm-svn: 110468

llvm-svn: 110466

implementation of the function is equivalent, so no need to provide
the target-specific version until/unless it needs to do something.

llvm-svn: 110465

llvm-svn: 110464

After heavy editing of a live interval, it is much easier to simply renumber the
live values instead of trying to keep track of the unused ones.

llvm-svn: 110463

llvm-svn: 110460

llvm-svn: 110458

llvm-svn: 110456

llvm-svn: 110455

llvm-svn: 110454

llvm-svn: 110453

When a physical register is in use, some alias of that register has a live
interval with a relevant live range. That is the sad state of intervals after
physreg coalescing of subregs, and it is good enough for correct register
allocation.

llvm-svn: 110452