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11 Commits

Author SHA1 Message Date
Tim Northover fe5f89ba14 GlobalISel: rework CallLowering so that it can be used for libcalls too. 
There should be no functional change here, I'm just making the implementation
of "frem" (to libcall) legalization easier for a followup.

llvm-svn: 279987
 2016-08-29 19:07:08 +00:00
Ahmed Bougacha 6756a2c953 [GlobalISel] Introduce an instruction selector. 
And implement it for AArch64, supporting x/w ADD/OR.

Differential Revision: https://reviews.llvm.org/D22373

llvm-svn: 276875
 2016-07-27 14:31:55 +00:00
Tim Northover 33b07d6725 GlobalISel: implement legalization pass, with just one transformation. 
This adds the actual MachineLegalizeHelper to do the work and a trivial pass
wrapper that legalizes all instructions in a MachineFunction. Currently the
only transformation supported is splitting up a vector G_ADD into one acting on
smaller vectors.

llvm-svn: 276461
 2016-07-22 20:03:43 +00:00
Tim Northover 75ad077330 GlobalISel: implement Legalization querying framework. 
This adds an (incomplete, inefficient) framework for deciding what to do with
some operation on a given type.

llvm-svn: 276184
 2016-07-20 21:13:29 +00:00
Quentin Colombet b235d32e74 [GlobalISel] Add the RegisterBankInfo class for the handling of register banks. 
llvm-svn: 265449
 2016-04-05 20:02:47 +00:00
Quentin Colombet bdc3b4d523 [GlobalISel] Add a class, RegisterBank, to represent register banks. 
llvm-svn: 265445
 2016-04-05 19:54:44 +00:00
Quentin Colombet 8e8e85c19f [GlobalISel] Add the skeleton of the RegBankSelect pass. 
This pass is reponsible for assigning the generic virtual registers to register
banks.

llvm-svn: 265440
 2016-04-05 19:06:01 +00:00
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