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2240c0df71
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41 Commits

Author SHA1 Message Date
Chris Lattner
2240c0df71 remove this method I just added, now is not the time. 
llvm-svn: 25729
 2006-01-28 03:43:33 +00:00
Chris Lattner
063c13029b add a new callback 
llvm-svn: 25727
 2006-01-28 03:37:03 +00:00
Nate Begeman
87c2c0e66b Implement Promote for VAARG, and allow it to be custom promoted for people 
who don't want the default behavior (Alpha).

llvm-svn: 25726
 2006-01-28 03:14:31 +00:00
Nate Begeman
d2c6fbef4a Remove TLI.LowerReturnTo, and just let targets custom lower ISD::RET for 
the same functionality.  This addresses another piece of bug 680.  Next,
on to fixing Alpha VAARG, which I broke last time.

llvm-svn: 25696
 2006-01-27 21:09:22 +00:00
Chris Lattner
ab8e0e40f9 Add a method for inline asm support. 
llvm-svn: 25656
 2006-01-26 20:27:33 +00:00
Nate Begeman
c29fac7fce First part of bug 680: 
Remove TLI.LowerVA* and replace it with SDNodes that are lowered the same
way as everything else.

llvm-svn: 25606
 2006-01-25 18:21:52 +00:00
Evan Cheng
f4b53efbb2 Add a enum to specify target scheduling preference: SchedulingForLatency or 
SchedulingForRegPressure. Added corresponding methods to set / get the value.

llvm-svn: 25598
 2006-01-25 09:09:02 +00:00
Chris Lattner
8fe9dd16fb Provide an interface for Targets to specify their stack pointer register 
for llvm.stacksave/restore.

llvm-svn: 25275
 2006-01-13 17:47:52 +00:00
Jeff Cohen
8727139340 Oh oh... Unix is case sensitive. 
llvm-svn: 24928
 2005-12-22 01:46:59 +00:00
Jeff Cohen
8afabfd8f1 Make it compile with VC++. 
llvm-svn: 24927
 2005-12-22 01:44:51 +00:00
Evan Cheng
822f360f84 Added TargetLowering::isMaskedValueZeroForTargetNode() declaration. 
llvm-svn: 24923
 2005-12-21 23:15:41 +00:00
Evan Cheng
44e4e6a57f Added a hook to print out names of target specific DAG nodes. 
llvm-svn: 24877
 2005-12-20 06:22:03 +00:00
Nate Begeman
a1c2df2471 Add the majority of the vector machien value types we expect to support, 
and make a few changes to the legalization machinery to support more than
16 types.

llvm-svn: 24511
 2005-11-29 05:45:29 +00:00
Nate Begeman
5784fb4adf Teach the type lowering code about turning packed types into vector types. 
Next step: generating vector dag nodes, and legalizing them into scalar
code.

llvm-svn: 24404
 2005-11-17 21:44:42 +00:00
Nate Begeman
6c42f509bc Invert the TargetLowering flag that controls divide by consant expansion. 
Add a new flag to TargetLowering indicating if the target has really cheap
  signed division by powers of two, make ppc use it.  This will probably go
  away in the future.
Implement some more ISD::SDIV folds in the dag combiner
Remove now dead code in the x86 backend.

llvm-svn: 23853
 2005-10-21 00:02:42 +00:00
Nate Begeman
2b0b27775d Enable targets to say that integer divide is expensive, which will trigger 
an upcoming optimization in the DAG Combiner.

llvm-svn: 23834
 2005-10-20 02:14:14 +00:00
Nate Begeman
ee581735d9 Add the ability to lower return instructions to TargetLowering. This 
allows us to lower legal return types to something else, to meet ABI
requirements (such as that i64 be returned in two i32 regs on Darwin/ppc).

llvm-svn: 23802
 2005-10-18 23:23:37 +00:00
Chris Lattner
62922d5727 Add a new flag for targets where setjmp/longjmp saves/restores the signal mask, 
and _setjmp/_longjmp should be used instead (for llvm.setjmp/llvm.longjmp).

llvm-svn: 23479
 2005-09-27 22:13:36 +00:00
Reid Spencer
31b20389f9 Change the names of member variables per Chris' instructions, and document 
them more clearly.

llvm-svn: 23118
 2005-08-27 19:09:02 +00:00
Chris Lattner
e91069c4de add some forward defs 
llvm-svn: 23100
 2005-08-26 21:06:40 +00:00
Chris Lattner
ac19224b29 spell this right! 
llvm-svn: 23097
 2005-08-26 20:53:44 +00:00
Chris Lattner
98bd9339ce Add a hook 
llvm-svn: 23096
 2005-08-26 20:53:09 +00:00
Chris Lattner
b71b78a79d rename hasNativeSupportFor* -> is(Operation|Type)Legal. 
llvm-svn: 23011
 2005-08-24 16:34:59 +00:00
Jeff Cohen
81980781a1 Eliminate tabs and trailing spaces. 
llvm-svn: 22520
 2005-07-27 05:53:44 +00:00
Reid Spencer
40c5ebe4eb For: memory operations -> stores 
This is the first incremental patch to implement this feature. It adds no
functionality to LLVM but setup up the information needed from targets in
order to implement the optimization correctly. Each target needs to specify
the maximum number of store operations for conversion of the llvm.memset,
llvm.memcpy, and llvm.memmove intrinsics into a sequence of store operations.
The limit needs to be chosen at the threshold of performance for such an
optimization (generally smallish). The target also needs to specify whether
the target can support unaligned stores for multi-byte store operations.
This helps ensure the optimization doesn't generate code that will trap on
an alignment errors.
More patches to follow.

llvm-svn: 22468
 2005-07-19 04:52:44 +00:00
Chris Lattner
bf100c8bdb Make several cleanups to Andrews varargs change: 
1. Pass Value*'s into lowering methods so that the proper pointers can be
   added to load/stores from the valist
2. Intrinsics that return void should only return a token chain, not a token
   chain/retval pair.
3. Rename LowerVAArgNext -> LowerVAArg, because VANext is long gone.

llvm-svn: 22338
 2005-07-05 19:57:53 +00:00
Andrew Lenharth
108f509fb5 header file changes for varargs 
llvm-svn: 22253
 2005-06-18 18:31:30 +00:00
Chris Lattner
ae59fdbd99 Pass the dag into LowerOperation 
llvm-svn: 22005
 2005-05-14 05:51:05 +00:00
Chris Lattner
9d788e93a6 Add an isTailCall flag to LowerCallTo 
llvm-svn: 21958
 2005-05-13 18:50:42 +00:00
Chris Lattner
ccb86c9acc LowerCallTo now takes the cc to use 
llvm-svn: 21901
 2005-05-12 19:57:08 +00:00
Chris Lattner
045b3f0110 Add a little hook 
llvm-svn: 21883
 2005-05-12 02:02:21 +00:00
Misha Brukman
58c97e67f3 Remove trailing whitespace 
llvm-svn: 21412
 2005-04-21 20:59:05 +00:00
Chris Lattner
f275f2af41 Allow targets which produce setcc results in non-MVT::i1 registers to describe 
what the contents of the top bits of these registers are, in the common cases
of targets that sign and zero extend the results.

llvm-svn: 21145
 2005-04-07 19:41:18 +00:00
Nate Begeman
e0ab2218d1 Change LowerCallTo to take a boolean isVarArg argument. This is needed 
by the PowerPC backend, and probably others in the future.

llvm-svn: 20843
 2005-03-26 01:30:30 +00:00
Chris Lattner
4938a7c8a1 Move all data members to the end of the class. 
Add a hook to find out how the target handles shift amounts that are out of
range.  Either they are undefined (the default), they mask the shift amount
to the size of the register (X86, Alpha, etc), or they extend the shift (PPC).

This defaults to undefined, which is conservatively correct.

llvm-svn: 19676
 2005-01-19 03:36:03 +00:00
Chris Lattner
8dd332e4e5 Add comments 
Add fields to hold the result type of setcc operations and shift amounts.

llvm-svn: 19618
 2005-01-16 23:59:30 +00:00
Chris Lattner
e38f72316d Revamp supported ops. Instead of just being supported or not, we now keep 
track of how to deal with it, and provide the target with a hook that they
can use to legalize arbitrary operations in arbitrary ways.

llvm-svn: 19609
 2005-01-16 07:27:49 +00:00
Chris Lattner
1d0e1ffe02 Move some information out of LegalizeDAG into the generic Target interface. 
llvm-svn: 19581
 2005-01-16 01:10:58 +00:00
Chris Lattner
42dd85fc56 Add interfaces to lower varargs and return/frame address intrinsics. 
llvm-svn: 19406
 2005-01-09 00:00:31 +00:00
Chris Lattner
2a75da3851 Make LowerCallTo more generic and useful. 
llvm-svn: 19373
 2005-01-08 19:25:39 +00:00
Chris Lattner
01ed041b94 First draft of a new Target interface 
llvm-svn: 19323
 2005-01-07 07:44:22 +00:00