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4 Commits

Author SHA1 Message Date
Quentin Colombet 39293d3aaa [GlobalISel] Introduce initializer method to support start/stop-after features. 
llvm-svn: 262896
 2016-03-08 01:38:55 +00:00
Quentin Colombet bde158cbc7 [CMake] Produce an empty library for GlobalISel when not building it. 
The rational for this change is that LLVMBuild cannot express conditional 
dependencies. Therefore, when we start optionally using GlobalISel library for 
say AArch64, without that change, all the tools that use the AArch64 library 
would need to explicitly link with GlobalISel when we ask for it.

This does not scale.

Instead, we will set the dependencies between the target and GlobalISel and if 
we did not ask to build GlobalISel, the library will just be empty.

Thanks to Chris Bieneman and Mehdi Animi for the idea.

llvm-svn: 260566
 2016-02-11 19:18:27 +00:00
Quentin Colombet 2ad1f851a1 [GlobalISel] Add a MachineIRBuilder class. 
Helper class to build machine instrs. This is a higher abstraction
than MachineInstrBuilder.

llvm-svn: 260547
 2016-02-11 17:44:59 +00:00
Quentin Colombet 105cf2b179 [GlobalISel] Add the proper cmake plumbing. 
This patch adds the necessary plumbing to cmake to build the sources related to
GlobalISel.

To build the sources related to GlobalISel, we need to add -DBUILD_GLOBAL_ISEL=ON.
By default, this is OFF, thus GlobalISel sources will not impact people that do
not explicitly opt-in.

Differential Revision: http://reviews.llvm.org/D15983

llvm-svn: 258344
 2016-01-20 20:58:56 +00:00