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180 Commits

Author SHA1 Message Date
Dan Gohman
d0caefa601 Implement bottom-up fast-isel. This has the advantage of not requiring 
a separate DCE pass over MachineInstrs.

llvm-svn: 107804
 2010-07-07 19:20:32 +00:00
Dan Gohman
424cc6b616 Add X86FastISel support for return statements. This entails refactoring 
a bunch of stuff, to allow the target-independent calling convention
logic to be employed.

llvm-svn: 107800
 2010-07-07 18:32:53 +00:00
Dan Gohman
1c3ce1ccd5 Move FunctionLoweringInfo.h out into include/llvm/CodeGen. This will 
allow target-specific fast-isel code to make use of it directly.

llvm-svn: 107787
 2010-07-07 16:01:37 +00:00
Dan Gohman
c768525273 Split the SDValue out of OutputArg so that SelectionDAG-independent 
code can do calling-convention queries. This obviates OutputArgReg.

llvm-svn: 107786
 2010-07-07 15:54:55 +00:00
Dan Gohman
d409104054 CanLowerReturn doesn't need a SelectionDAG; it just needs an LLVMContext. 
SelectBasicBlock doesn't needs its BasicBlock argument.

llvm-svn: 107712
 2010-07-06 22:19:37 +00:00
Devang Patel
7ab104353b Propagate debug loc. 
llvm-svn: 107710
 2010-07-06 22:08:15 +00:00
Chris Lattner
bbc150b397 random tidying 
llvm-svn: 107612
 2010-07-05 05:36:21 +00:00
Dale Johannesen
df6db93a4d Propagate the AlignStack bit in InlineAsm's to the 
PrologEpilog code, and use it to determine whether
the asm forces stack alignment or not.  gcc consistently
does not do this for GCC-style asms; Apple gcc inconsistently
sometimes does it for asm blocks.  There is no
convenient place to put a bit in either the SDNode or
the MachineInstr form, so I've added an extra operand
to each; unlovely, but it does allow for expansion for
more bits, should we need it.  PR 5125.  Some
existing testcases are affected.
The operand lists of the SDNode and MachineInstr forms
are indexed with awesome mnemonics, like "2"; I may
fix this someday, but not now.  I'm not making it any
worse.  If anyone is inspired I think you can find all
the right places from this patch.

llvm-svn: 107506
 2010-07-02 20:16:09 +00:00
Dan Gohman
a3d664a713 Rename CreateReg to CreateRegs, and MakeReg to CreateReg. 
llvm-svn: 107451
 2010-07-02 00:10:16 +00:00
Dan Gohman
665da59f4d Rename CreateRegForValue to CreateReg, and change its argument 
from a Value to a Type, because it doesn't actually care about
the Value.

llvm-svn: 107383
 2010-07-01 03:55:39 +00:00
Dan Gohman
bac963d556 Reapply r106422, splitting the code for materializing a value out of 
SelectionDAGBuilder::getValue into a helper function, with fixes to
use DenseMaps safely.

llvm-svn: 107371
 2010-07-01 01:59:43 +00:00
Dan Gohman
c944ad6634 Don't use operator[] here, because it's not desirable to insert a default 
value if the search fails.

llvm-svn: 107368
 2010-07-01 01:33:21 +00:00
Duncan Sands
78ad152ca0 Remove an unused variable. The call to getRoot has side-effects, so 
this could break something (but doesn't seem to).

llvm-svn: 107295
 2010-06-30 17:22:28 +00:00
Gabor Greif
398d23a2de use ArgOperand API 
llvm-svn: 107279
 2010-06-30 12:55:46 +00:00
Duncan Sands
b955b3bf92 Remove initialized but otherwise unused variables. 
llvm-svn: 107127
 2010-06-29 11:22:26 +00:00
Dale Johannesen
b1fc776fca The hasMemory argument is irrelevant to how the argument 
for an "i" constraint should get lowered; PR 6309.  While
this argument was passed around a lot, this is the only
place it was used, so it goes away from a lot of other
places.

llvm-svn: 106893
 2010-06-25 21:55:36 +00:00
Duncan Sands
4fa152555d Remove variables which are assigned to but for which the value 
is not used.  Spotted by gcc-4.6.

llvm-svn: 106854
 2010-06-25 14:48:39 +00:00
Gabor Greif
dd11f62c9d use ArgOperand API 
llvm-svn: 106836
 2010-06-25 09:38:13 +00:00
Dan Gohman
e457bb6d5a Simplify this code; switch lowering shouldn't produce cases 
which trivially fold away.

llvm-svn: 106765
 2010-06-24 17:08:31 +00:00
Dan Gohman
7953fd5824 Optimize the "bit test" code path for switch lowering in the 
case where the bit mask has exactly one bit.

llvm-svn: 106716
 2010-06-24 02:06:24 +00:00
Dan Gohman
dde4324c3c Revert r106422, which is breaking the non-fast-isel path. 
llvm-svn: 106423
 2010-06-21 16:02:28 +00:00
Dan Gohman
2b77cf3eed More changes for non-top-down fast-isel. 
Split the code for materializing a value out of
SelectionDAGBuilder::getValue into a helper function, so that it can
be used in other ways. Add a new getNonRegisterValue function which
uses it, for use in code which doesn't want a CopyFromReg even
when FuncMap.ValueMap already has an entry for it.

llvm-svn: 106422
 2010-06-21 15:13:54 +00:00
Dan Gohman
0b5b93b20d Eliminate unnecessary uses of getZExtValue(). 
llvm-svn: 106279
 2010-06-18 14:22:04 +00:00
Devang Patel
b8d4476106 Keep track of incoming debug value of unused argument. 
Radar 7927666.

llvm-svn: 105285
 2010-06-01 19:59:01 +00:00
Dan Gohman
0d280a8dbc Reorder some code in SelectionDAGBuilder. 
llvm-svn: 105105
 2010-05-29 17:53:24 +00:00
Dan Gohman
ed310b8bca SelectionDAG shouldn't have a FunctionLoweringInfo member. RegsForValue 
shouldn't have a TargetLoweringInfo member. And FunctionLoweringInfo::set
doesn't needs its EnableFastISel argument.

llvm-svn: 105101
 2010-05-29 17:03:36 +00:00
Dan Gohman
bcee12027f Eliminate the restriction that the array size in an alloca must be i32. 
This will help reduce the amount of casting required on 64-bit targets.

llvm-svn: 104911
 2010-05-28 01:14:11 +00:00
Jim Grosbach
d788f9b580 back out 104862/104869. Can reuse stacksave after all. Very cool. 
llvm-svn: 104897
 2010-05-27 23:11:57 +00:00
Jim Grosbach
0ff473d68a hook ISD::STACKADDR to an intrinsic 
llvm-svn: 104869
 2010-05-27 18:52:11 +00:00
Jim Grosbach
bb4860d2a2 Adjust eh.sjlj.setjmp to properly have a chain and to have an opcode entry in 
ISD::. No functional change.

llvm-svn: 104734
 2010-05-26 20:22:18 +00:00
Jim Grosbach
b6cc69c655 Implement eh.sjlj.longjmp for ARM. Clean up the intrinsic a bit. 
Followups: docs patch for the builtin and eh.sjlj.setjmp cleanup to match
longjmp.

llvm-svn: 104419
 2010-05-22 01:06:18 +00:00
Duncan Sands
7d5e4152c3 I got tired of VISIBILITY_HIDDEN colliding with the gcc enum. Rename it 
to LLVM_LIBRARY_VISIBILITY and introduce LLVM_GLOBAL_VISIBILITY, which is
the opposite, for future use by dragonegg.

llvm-svn: 103495
 2010-05-11 20:16:09 +00:00
Douglas Gregor
2f2491405a Fixes for Microsoft Visual Studio 2010, from Steven Watanabe! 
llvm-svn: 103457
 2010-05-11 06:17:44 +00:00
Devang Patel
3c2f4664fc Verify variable directly. 
llvm-svn: 103305
 2010-05-07 22:04:20 +00:00
Devang Patel
041a8fa086 Use getValue() for PHINodes when direct NodeMap access does not work. 
llvm-svn: 103126
 2010-05-05 22:29:00 +00:00
Dan Gohman
37fe41a8c0 Don't pass SDValues by non-const reference unless they may be 
modified.

llvm-svn: 102816
 2010-05-01 00:33:16 +00:00
Dan Gohman
0561bd78d0 Reorgnaize more switch code lowering to clean up some tricky 
code, and to eliminate the need for the SelectionDAGBuilder
state to be live during CodeGenAndEmitDAG calls.

Call SDB->clear() before CodeGenAndEmitDAG calls instead of
before it, and move the CurDAG->clear() out of SelectionDAGBuilder,
which doesn't own the DAG, and into CodeGenAndEmitDAG.

llvm-svn: 102814
 2010-05-01 00:25:44 +00:00
Dan Gohman
d59de31ce2 Delete the EdgeMapping variable itself. 
llvm-svn: 102810
 2010-05-01 00:02:20 +00:00
Devang Patel
bdfc01f418 Refactor. 
llvm-svn: 102661
 2010-04-29 20:40:36 +00:00
Devang Patel
1e28f36308 DO not push DBG_VALUE machine instructions for inlined fuction arguments in entry block. 
llvm-svn: 102653
 2010-04-29 18:50:36 +00:00
Evan Cheng
ba7dcad569 Re-enable 102565 with fixes. 
llvm-svn: 102602
 2010-04-29 06:33:38 +00:00
Evan Cheng
3e9545cfb4 Temporarily disable my changes to unbreak the build. 
llvm-svn: 102590
 2010-04-29 03:34:19 +00:00
Evan Cheng
053000f3f5 Do not generate duplicate dbg_value instructions for function arguments. 
llvm-svn: 102585
 2010-04-29 01:40:30 +00:00
Evan Cheng
801b8e5530 Avoid emitting a dbg_value machineinstr that's not going to be inserted into entry block. 
llvm-svn: 102581
 2010-04-29 01:23:55 +00:00
Evan Cheng
d08e8f2b24 Check Reg against zero. 
llvm-svn: 102573
 2010-04-29 00:59:34 +00:00
Devang Patel
84e3ddd87c tidy up. 
llvm-svn: 102558
 2010-04-28 23:24:13 +00:00
Evan Cheng
a02c9072fc Replace r102368 with code that's less fragile. This creates DBG_VALUE instructions for function arguments early and insert them after instruction selection is done. 
llvm-svn: 102554
 2010-04-28 23:08:54 +00:00
Devang Patel
8b3c1ffb8b Ignore DBG_VALUE instructions that points to undef values. 
llvm-svn: 102463
 2010-04-27 20:54:45 +00:00
Dale Johannesen
244d2bdb24 Revert a small part of 102372; this fixes at least one 
of the dbg testsuite regressions.  I don't think this is
really the right fix; this change exposed an existing problem
upstream somewhere.

llvm-svn: 102410
 2010-04-27 02:10:05 +00:00
Dale Johannesen
2f1de9e0c1 Remove crufty comments. 
llvm-svn: 102380
 2010-04-26 20:48:54 +00:00