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57 Commits

Author SHA1 Message Date
Owen Anderson 9f94459d24 Split EVT into MVT and EVT, the former representing _just_ a primitive type, while 
the latter is capable of representing either a primitive or an extended type.

llvm-svn: 78713
 2009-08-11 20:47:22 +00:00
Owen Anderson 53aa7a960c Rename MVT to EVT, in preparation for splitting SimpleValueType out into its own struct type. 
llvm-svn: 78610
 2009-08-10 22:56:29 +00:00
Dan Gohman f9bbcd1afd Major calling convention code refactoring. 
Instead of awkwardly encoding calling-convention information with ISD::CALL,
ISD::FORMAL_ARGUMENTS, ISD::RET, and ISD::ARG_FLAGS nodes, TargetLowering
provides three virtual functions for targets to override:
LowerFormalArguments, LowerCall, and LowerRet, which replace the custom
lowering done on the special nodes. They provide the same information, but
in a more immediately usable format.

This also reworks much of the target-independent tail call logic. The
decision of whether or not to perform a tail call is now cleanly split
between target-independent portions, and the target dependent portion
in IsEligibleForTailCallOptimization.

This also synchronizes all in-tree targets, to help enable future
refactoring and feature work.

llvm-svn: 78142
 2009-08-05 01:29:28 +00:00
Eli Friedman aea9b65668 Make SINT_TO_FP/UINT_TO_FP vector legalization queries query on the 
integer type to be consistent with normal operation legalization.  No visible
change because nothing is actually using this at the moment.

llvm-svn: 72980
 2009-06-06 03:27:50 +00:00
Eli Friedman 3b251705fd Remove special cases for more opcodes. 
llvm-svn: 72467
 2009-05-27 07:58:35 +00:00
Eli Friedman ac149ee60a Add a comment which should hopefully make the purpose of this method a 
bit clearer.

llvm-svn: 72374
 2009-05-24 20:32:10 +00:00
Eli Friedman da90dd6d72 Add a new step to legalization to legalize vector math operations. This 
will allow simplifying LegalizeDAG to eliminate type legalization.  (I 
have a patch to do that, but it's not quite finished; I'll commit it 
once it's finished and I've fixed any review comments for this patch.)  
See the comment at the beginning of 
lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp for more details on the
motivation for this patch.

llvm-svn: 72325
 2009-05-23 12:35:30 +00:00