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9 Commits

Author SHA1 Message Date
Richard Smith
84c4cc47f5 Don't use "return {...}" to initialize a std::tuple. This has only been valid 
since 2015 (n4387), though it's allowed by a library DR so new implementations
accept it in their C++11 modes...

This should unbreak the build with libstdc++ 4.9.

llvm-svn: 279583
 2016-08-23 22:21:58 +00:00
Tim Northover
bdf67c9a00 GlobalISel: make truncate/extend casts uniform 
They really should have both types represented, but early variants were created
before MachineInstrs could have multiple types so they're rather ambiguous.

llvm-svn: 279567
 2016-08-23 21:01:33 +00:00
Tim Northover
b3a0be4d38 GlobalISel: legalize conditional branches on AArch64. 
llvm-svn: 279565
 2016-08-23 21:01:20 +00:00
Tim Northover
a01bece1dc GlobalISel: extend legalizer interface to handle multiple types. 
Instructions like G_ICMP have multiple types that may need to be legalized (the
boolean output and nearly arbitrary inputs in this case). So the legalizer must
be capable of deciding what to do for each of them separately.

llvm-svn: 279554
 2016-08-23 19:30:42 +00:00
Tim Northover
ea904f9424 GlobalISel: teach legalizer how to handle integer constants. 
llvm-svn: 279340
 2016-08-19 22:40:00 +00:00
Tim Northover
323358184e GlobalISel: add code to widen scalar G_ADD 
llvm-svn: 277747
 2016-08-04 18:35:11 +00:00
Ahmed Bougacha
f49ab9af2c [GlobalISel] Const-ify MachineInstrs passed to MachineLegalizer. 
llvm-svn: 277445
 2016-08-02 11:41:03 +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