Move DataLayout back to the TargetMachine from TargetSubtargetInfo
Audit RequiredrL227113

Description

Move DataLayout back to the TargetMachine from TargetSubtargetInfo
derived classes.

Since global data alignment, layout, and mangling is often based on the
DataLayout, move it to the TargetMachine. This ensures that global
data is going to be layed out and mangled consistently if the subtarget
changes on a per function basis. Prior to this all targets(*) have
had subtarget dependent code moved out and onto the TargetMachine.

*One target hasn't been migrated as part of this change: R600. The
R600 port has, as a subtarget feature, the size of pointers and
this affects global data layout. I've currently hacked in a FIXME
to enable progress, but the port needs to be updated to either pass
the 64-bitness to the TargetMachine, or fix the DataLayout to
avoid subtarget dependent features.

Details

Auditors
dsanders
Committed
echristoJan 26 2015, 11:03 AM
Parents
rL227112: Refine memory dependence's notion of volatile semantics
Branches
Unknown
Tags
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