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24929 Commits

Author SHA1 Message Date
Dan Gohman
5b43aa0ddd Sink SelectionDAGBuilder's HandlePHINodesInSuccessorBlocks down 
into SelectionDAGBuilder itself.

llvm-svn: 102128
 2010-04-22 20:55:53 +00:00
Devang Patel
ea2744f4dc Adjust debug range offsets for isWeakForLinker() functions. 
llvm-svn: 102127
 2010-04-22 20:52:00 +00:00
Dan Gohman
c594eab10f Move HandlePHINodesInSuccessorBlocks functions out of SelectionDAGISel 
and into SelectionDAGBuilder and FastISel.

llvm-svn: 102123
 2010-04-22 20:46:50 +00:00
Evan Cheng
f1223bdec0 - It's not safe to promote rotates (at least not trivially). 
- Some code refactoring.

llvm-svn: 102111
 2010-04-22 20:19:46 +00:00
Dan Gohman
e149e9896c Fix a comment. 
llvm-svn: 102110
 2010-04-22 20:06:42 +00:00
Dan Gohman
fd81254190 Move PHINodesToUpdate out of SelectionDAGBuilder and into 
FunctionLoweringInfo, as it isn't SelectionDAG-specific. This isn't
completely natural, as PHI node state is not per-function but rather
per-basic-block, however there's currently no other convenient
per-basic-block state to group it with.

llvm-svn: 102109
 2010-04-22 19:55:20 +00:00
Devang Patel
0fde4aeedd Rename InsnAfterLabelMap and InsnBeforeLabelMap. 
llvm-svn: 102106
 2010-04-22 18:43:35 +00:00
Devang Patel
53f530d44c Keep track of MCSymbol used to mark beginning of a function. 
llvm-svn: 102104
 2010-04-22 18:39:21 +00:00
Devang Patel
bae14a1cab At this point Start and End are not null. 
llvm-svn: 102102
 2010-04-22 18:28:58 +00:00
Jakob Stoklund Olesen
14b1d758c6 Run LiveVariables instead of computing liveness locally in -regalloc=fast. 
This actually makes everything slower, but the plan is to have isel add <kill>
flags the way it is already adding <dead> flags. Then LiveVariables can be
removed again.

When ignoring the time spent in LiveVariables, -regalloc=fast is now twice as
fast as -regalloc=local.

llvm-svn: 102034
 2010-04-21 23:18:07 +00:00
Evan Cheng
02e816b317 Do not try to optimize a copy that has already been marked for deletion. 
llvm-svn: 102027
 2010-04-21 20:57:54 +00:00
Devang Patel
1a6e399874 Add command line option to disable debug info printing in .s file. This option does not impact debug info generation and preservation through earlier compile starges. 
llvm-svn: 102012
 2010-04-21 19:08:53 +00:00
Jakob Stoklund Olesen
8a070a540d Add fast register allocator, enabled with -regalloc=fast. 
So far this is just a clone of -regalloc=local that has been lobotomized to run
25% faster. It drops the least-recently-used calculations, and is just plain
stupid when it runs out of registers.

The plan is to make this go even faster for -O0 by taking advantage of the short
live intervals in unoptimized code. It should not be necessary to calculate
liveness when most virtual registers are killed 2-3 instructions after they are
born.

llvm-svn: 102006
 2010-04-21 18:02:42 +00:00
Devang Patel
0940a8085e Identify when a lexical scope is split in to multiple instruction ranges. Emit such ranges using DW_AT_ranges. 
llvm-svn: 102004
 2010-04-21 16:32:19 +00:00
Evan Cheng
4158a0ff6b Implement -disable-non-leaf-fp-elim which disable frame pointer elimination 
optimization for non-leaf functions. This will be hooked up to gcc's
-momit-leaf-frame-pointer option. rdar://7886181

llvm-svn: 101984
 2010-04-21 03:18:23 +00:00
Dan Gohman
57c732b032 Add more const qualifiers on TargetMachine and friends. 
llvm-svn: 101977
 2010-04-21 01:34:56 +00:00
Dan Gohman
cc5e6528a5 Update CMakeLists.txt. 
llvm-svn: 101976
 2010-04-21 01:32:29 +00:00
Dan Gohman
450aa64fc1 Move several SelectionDAG-independent utility functions out of the 
SelectionDAG directory and into a new Analysis.cpp file.

llvm-svn: 101975
 2010-04-21 01:22:34 +00:00
Evan Cheng
2034d9f2da - Clean up some crappy code which deals with coalescing of copies which look at 
extract_subreg / insert_subreg, etc.
- Add support for more aggressive insert_subreg coalescing.

llvm-svn: 101971
 2010-04-21 00:44:22 +00:00
Evan Cheng
4b2ef56ad2 Rewrite machine cse to avoid recursion. 
llvm-svn: 101964
 2010-04-21 00:21:07 +00:00
Dan Gohman
ad33d33719 Add another variant of this test which found a place where 
CodeGen's ComputeMaskedBits was being over-conservative when computing
bits for an ADD.

llvm-svn: 101963
 2010-04-21 00:19:28 +00:00
Dale Johannesen
0522b90cdb Because of the EMMS problem, right now we have to support 
user-defined operations that use MMX register types, but
the compiler shouldn't generate them on its own.  This adds
a Synthesizable abstraction to represent this, and changes
the vector widening computation so it won't produce MMX types.
(The motivation is to remove noise from the ABI compatibility
part of the gcc test suite, which has some breakage right now.)

llvm-svn: 101951
 2010-04-20 22:34:09 +00:00
Jakob Stoklund Olesen
011207a0ae When MachineLICM is hoisting a physical register after regalloc, make sure the 
register is not killed in the loop.

This fixes 188.ammp on ARM where the post-ra scheduler would grab a register
that looked available but wasn't.

A testcase would be huge and fragile, sorry.

llvm-svn: 101930
 2010-04-20 18:45:47 +00:00
Evan Cheng
4019d571d9 Typo. 
llvm-svn: 101914
 2010-04-20 17:27:38 +00:00
Dan Gohman
950fe784be Sink the CopyToExportRegsIfNeeded calls out of SelectionDAGISel 
into SelectionDAGBuilder. This avoids a separate pass over the
instructions, and has the side effect of providing debug location
information to the copy.

llvm-svn: 101906
 2010-04-20 15:03:56 +00:00
Dan Gohman
f41ad478ca Don't send PHI nodes down to SelectionDAGBuilder of FastISel, since 
they end up doing nothing.

llvm-svn: 101904
 2010-04-20 15:00:41 +00:00
Dan Gohman
7c845e4ea4 Sink this use_empty() check into isUsedOutsideOfDefiningBlock. 
llvm-svn: 101902
 2010-04-20 14:50:13 +00:00
Dan Gohman
7b7f0883fe If a PHI node somehow has debug info, propogate it to the MachineInstr PHI. 
llvm-svn: 101901
 2010-04-20 14:48:02 +00:00
Dan Gohman
0f055d3f56 Don't iterate through the whole block just to find the PHI nodes. 
llvm-svn: 101900
 2010-04-20 14:46:25 +00:00
Gabor Greif
27b3d55194 use abstract accessors to CallInst 
llvm-svn: 101899
 2010-04-20 13:13:04 +00:00
Chris Lattner
5100367ff3 Bill's change in r95336 broke empty aggregates embedded 
in other types.  fix this by only bumping zero-byte globals
up to a single byte if the *entire global* is zero size,
fixing PR6340.

This also fixes empty arrays etc to be handled correctly,
and only does this on subsection-via-symbols targets (aka
darwin) which is the only place where this matters.

llvm-svn: 101879
 2010-04-20 06:20:21 +00:00
Dan Gohman
0c862a86fa Delete a redundant return statement. 
llvm-svn: 101860
 2010-04-20 01:58:20 +00:00
Bill Wendling
467e6c2deb The visitXOR method can return the same SDNode. If so, we don't want to delete 
it as it's not dead.

llvm-svn: 101855
 2010-04-20 01:25:01 +00:00
Dan Gohman
eadc04badc Remove this debug output; it isn't that useful, and it's incomplete 
in the case where a basic block is split.

llvm-svn: 101850
 2010-04-20 00:56:44 +00:00
Dan Gohman
e450d7444d Sink DebugLoc handling out of SelectionDAGISel into FastISel and 
SelectionDAGBuilder, where it doesn't have to be as complicated.

llvm-svn: 101848
 2010-04-20 00:48:35 +00:00
Dan Gohman
3df671a81c Remove MachineFunction's DefaultDebugLoc member, and make DwarfDebug.cpp 
responsible for figuring out what that's supposed to be on its own.

llvm-svn: 101844
 2010-04-20 00:37:27 +00:00
Dan Gohman
ca35aa1122 Reapply the removal of SelectionDAGISel's BB, with a fix for the case 
where multiple blocks are emitted; functions which do this need to return
the new BB so that their callers can stay current.

llvm-svn: 101843
 2010-04-20 00:29:35 +00:00
Dan Gohman
be2e727a38 Revert 101825, which is causing trouble. 
llvm-svn: 101832
 2010-04-19 23:34:15 +00:00
Dan Gohman
35bc4d46cb Make BreakAntiDependencies' SUnits argument const, and make the Begin 
and End arguments by-value rather than by-reference.

llvm-svn: 101830
 2010-04-19 23:11:58 +00:00
Dan Gohman
8cccc542f6 Eliminate SelectionDAGISel's "current block" member. Just pass it as 
an argument to things that need it.

llvm-svn: 101825
 2010-04-19 22:51:14 +00:00
Dan Gohman
7c0303a059 Eliminate the CurMBB member from SelectionDAGBuilder. For places that 
need it, just pass around the parent block of the current instruction
explicitly.

llvm-svn: 101822
 2010-04-19 22:41:47 +00:00
Evan Cheng
e19aa5cc52 More progress on promoting i16 operations to i32 for x86. Work in progress. 
llvm-svn: 101808
 2010-04-19 19:29:22 +00:00
Dan Gohman
1e95790fd4 Give SelectionDAG a TargetMachine too, rather than having it 
fetch one from the MachineFunction.

llvm-svn: 101807
 2010-04-19 19:22:07 +00:00
Evan Cheng
e7c21a4242 More 80 col violation. 
llvm-svn: 101806
 2010-04-19 19:17:44 +00:00
Devang Patel
6188093cca Add DW_AT_APPLE_omit_frame_ptr to encode -fomit-frame-pointer flag. 
llvm-svn: 101805
 2010-04-19 19:14:02 +00:00
Dan Gohman
c334960f16 Code that needs a TargetMachine should have access to one directly, rather 
than just getting one through a TargetLowering.

llvm-svn: 101802
 2010-04-19 19:05:59 +00:00
Dan Gohman
a91754da67 Move isInTailCallPosition out of SelectionDAGBuilder, as it isn't 
SelectionDAG-specific.

llvm-svn: 101801
 2010-04-19 18:41:46 +00:00
Dan Gohman
1f0f2142cc Fix -Wcast-qual warnings. 
llvm-svn: 101655
 2010-04-17 17:42:52 +00:00
Dan Gohman
53d4a08d2b Add const qualifiers to TargetLoweringObjectFile usage. 
llvm-svn: 101640
 2010-04-17 16:44:48 +00:00
Dan Gohman
88f7f6aeda Use const_cast instead of a C-style cast to cast away const. 
llvm-svn: 101639
 2010-04-17 16:43:55 +00:00