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Jakob Stoklund Olesen 3f8f107cc8 Tighten up the erase/remove API for bundled instructions.

Most code is oblivious to bundles and uses the MBB::iterator which only
visits whole bundles. MBB::erase() operates on whole bundles at a time
as before.

MBB::remove() now refuses to remove bundled instructions. It is not safe
to remove all instructions in a bundle without deleting them since there
is no way of returning pointers to all the removed instructions.

MBB::remove_instr() and MBB::erase_instr() will now update bundle flags
correctly, lifting individual instructions out of bundles while leaving
the remaining bundle intact.

The MachineInstr convenience functions are updated so

  eraseFromParent() erases a whole bundle as before
  eraseFromBundle() erases a single instruction, leaving the rest of its bundle.
  removeFromParent() refuses to operate on bundled instructions, and
  removeFromBundle() lifts a single instruction out of its bundle.

These functions will no longer accidentally split or coalesce bundles -
bundle flags are updated to preserve the existing bundling, and explicit
bundleWith* / unbundleFrom* functions should be used to change the
instruction bundling.

This API update is still a work in progress. I am going to update APIs
first so they maintain bundle flags automatically when possible. Then
I'll add stricter verification of the bundle flags.

llvm-svn: 170384

2012-12-17 23:55:38 +00:00

Analysis

Fix a crash in ValueTracking on vectors of pointers.

2012-12-14 20:43:49 +00:00

Archive

Sort includes for all of the .h files under the 'lib' tree. These were

2012-12-04 07:12:27 +00:00

AsmParser

Reorganize FastMathFlags to be a wrapper around unsigned, and streamline some interfaces.

2012-12-09 21:12:04 +00:00

Bitcode

Reorganize FastMathFlags to be a wrapper around unsigned, and streamline some interfaces.