Don't cache the MBB in the class. Its only used by one function. Change a for loop over operands to use unsigned instead of int.

llvm-svn: 162344

llvm-svn: 162342

llvm-svn: 161122

llvm-svn: 157885

Convert some uses of XXXRegisterClass to &XXXRegClass. No functional change since they are equivalent.

llvm-svn: 155186

Make all pointers to TargetRegisterClass const since they are all pointers to static data that should not be modified.

llvm-svn: 151134

generator to it. For non-bundle instructions, these behave exactly the same
as the MC layer API.

For properties like mayLoad / mayStore, look into the bundle and if any of the
bundled instructions has the property it would return true.
For properties like isPredicable, only return true if *all* of the bundled
instructions have the property.
For properties like canFoldAsLoad, isCompare, conservatively return false for
bundles.

llvm-svn: 146026

Enhanced vzeroupper insertion pass that avoids inserting vzeroupper where it is unnecessary through local analysis.  Patch from Bruno Cardoso Lopes, with some additional changes.

I'm going to wait for any review comments and perform some additional testing before turning this on by default.

llvm-svn: 143750

llvm-svn: 139079

SSE transition penalty. The pass is enabled through the "x86-use-vzeroupper"
llc command line option. This is only the first step (very naive and
conservative one) to sketch out the idea, but proper DFA is coming next
to allow smarter decisions. Comments and ideas now and in further commits
will be very appreciated.

llvm-svn: 138317