Analyze the live range's behavior entering and leaving basic blocks. Compute an
interference pattern for each allocation candidate, and use SpillPlacement to
find an optimal region where that register can be live.

This code is still not enabled.

llvm-svn: 123774

llvm-svn: 123772

llvm.objectsize changes.

llvm-svn: 123771

llvm-svn: 123770

llvm-svn: 123769

llvm-svn: 123768

llvm-svn: 123766

llvm-svn: 123763

llvm-svn: 123760

These were not recommended by my auto-simplifier since they don't fire often enough.
However they do fire from time to time, for example they remove one subtraction from
the final bitcode for 483.xalancbmk.

llvm-svn: 123755

simplification in fully optimized code.  It occurs sporadically in the testsuite, and
many times in 403.gcc: the final bitcode has 131 fewer subtractions after this change.
The reason that the multiplies are not eliminated is the same reason that instcombine
did not catch this: they are used by other instructions (instcombine catches this with
a more general transform which in general is only profitable if the operands have only
one use).

llvm-svn: 123754

llvm-svn: 123752

SPARC backend: Modified LowerCall and LowerFormalArguments so that they use CallingConv assignments.

llvm-svn: 123749

llvm-svn: 123748

llvm-svn: 123747

llvm-svn: 123746

llvm-svn: 123745

llvm-svn: 123744

llvm-svn: 123743

llvm-svn: 123740

llvm-svn: 123739

McARM: Always keep an offset expression, if used (instead of assuming == 0 if used but not present), and simplify logic.

Also, clean up various non-sensicalisms in isMemModeRegThumb() and isMemModeImmThumb().

llvm-svn: 123738

llvm-svn: 123737

llvm-svn: 123736

llvm-svn: 123732

function. This seems to be about a 1.5% speedup of -scalarrepl on test-suite
with SPEC2000 and SPEC2006.

llvm-svn: 123731

llvm-svn: 123729

llvm-svn: 123726

dominance and post-dominance frontiers.

llvm-svn: 123725

llvm-svn: 123724

llvm-svn: 123722

llvm-svn: 123717

the flags.

llvm-svn: 123712

constant but requires a unique address, we can still put it in a
readonly section, just not a mergable one.

llvm-svn: 123711

llvm-svn: 123707

ranges, add legalizer support for nested calls.  Necessary for ARM
byval support.  Radar 7662569.

llvm-svn: 123704

llvm-svn: 123687

Windows/PathV2.inc: MoveFileEx() can behave like Posix's mv(1) to specify MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING.

llvm-svn: 123686

lib/Support/Windows/Signals.inc: "Showstopper" dialogs may be suppressed with SetErrorMode() on Windows 7.

llvm-svn: 123685

without whatever this was trying to do.  When/if someone has the time to do some empirical
evaluations, it might be worth it to figure out what this code was trying to do and see if
it's worth resurrecting/fixing.

llvm-svn: 123684