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Lang Hames 3dd951e842 [X86] New and improved VZeroUpperInserter optimization.
- Adds support for inserting vzerouppers before tail-calls.
  This is enabled implicitly by having MachineInstr::copyImplicitOps preserve
  regmask operands, which allows VZeroUpperInserter to see where tail-calls use
  vector registers.

- Fixes a bug that caused the previous version of this optimization to miss some
  vzeroupper insertion points in loops. (Loops-with-vector-code that followed
  loops-without-vector-code were mistakenly overlooked by the previous version).

- New algorithm never revisits instructions.

Fixes <rdar://problem/16228798>



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204021 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-17 01:22:54 +00:00
autoconf Remove projects/sample. 2014-03-12 22:40:22 +00:00
bindings [python-bindings] Remove some cruft that snuck in. 2014-02-23 04:43:26 +00:00
cmake [CMake][cygming] Disable --out-implib from executables. 2014-03-16 13:51:24 +00:00
docs [docs] Add links to XMOS XCore documentation. 2014-03-14 15:53:50 +00:00
examples Fix warnings about an variable only used in asserts. 2014-03-06 06:35:46 +00:00
include Untabify. 2014-03-16 23:58:43 +00:00
lib [X86] New and improved VZeroUpperInserter optimization. 2014-03-17 01:22:54 +00:00
projects Remove projects/sample. 2014-03-12 22:40:22 +00:00
test [X86] New and improved VZeroUpperInserter optimization. 2014-03-17 01:22:54 +00:00
tools Support: Make error_category's constructor public 2014-03-15 04:05:59 +00:00
unittests [PM] As was pointed out in review, I need to define a custom swap in 2014-03-13 10:42:18 +00:00
utils Replace ValueTypes.h with MachineValueType.h if possible. 2014-03-15 09:11:41 +00:00
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Low Level Virtual Machine (LLVM)
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