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llvm-6502/test/CodeGen/SystemZ/Large
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Richard Sandiford 086791eca2 Add TargetLowering::prepareVolatileOrAtomicLoad 
One unusual feature of the z architecture is that the result of a
previous load can be reused indefinitely for subsequent loads, even if
a cache-coherent store to that location is performed by another CPU.
A special serializing instruction must be used if you want to force
a load to be reattempted.

Since volatile loads are not supposed to be omitted in this way,
we should insert a serializing instruction before each such load.
The same goes for atomic loads.

The patch implements this at the IR->DAG boundary, in a similar way
to atomic fences.  It is a no-op for targets other than SystemZ.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196905 91177308-0d34-0410-b5e6-96231b3b80d8
2013-12-10 10:36:34 +00:00
..
branch-range-01.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-02.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-03.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-04.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-05.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-06.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-07.py [SystemZ] Use BRCT and BRCTG to eliminate add-&-compare sequences 2013-08-05 11:23:46 +00:00
branch-range-08.py [SystemZ] Use BRCT and BRCTG to eliminate add-&-compare sequences 2013-08-05 11:23:46 +00:00
branch-range-09.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-10.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-11.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
branch-range-12.py Add TargetLowering::prepareVolatileOrAtomicLoad 2013-12-10 10:36:34 +00:00
lit.local.cfg
spill-01.py [SystemZ] Use MVC to spill loads and stores 2013-07-02 15:28:56 +00:00
spill-02.py [SystemZ] Enable the use of MVC for frame-to-frame spills 2013-07-05 14:02:01 +00:00