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9731 Commits

Author SHA1 Message Date
Dan Gohman
7767d2747b Add a utility function for conservatively clearing kill flags, and make 
use of it in MachineCSE.

llvm-svn: 103726
 2010-05-13 19:24:00 +00:00
Dan Gohman
5b510c1474 An Instruction has a trivial kill only if its use is in the same 
basic block.

llvm-svn: 103725
 2010-05-13 19:19:32 +00:00
Jakob Stoklund Olesen
0ba2e2a568 Take allocation hints from copy instructions to/from physregs. 
This causes way more identity copies to be generated, ripe for coalescing.

llvm-svn: 103686
 2010-05-13 00:19:43 +00:00
Jakob Stoklund Olesen
680b74941f More asserts around physreg uses 
llvm-svn: 103685
 2010-05-13 00:19:39 +00:00
Evan Cheng
4aab8b5425 If REG_SEQUENCE source is livein, copy it first. Also, update livevariables information when a copy is introduced. 
llvm-svn: 103680
 2010-05-13 00:00:35 +00:00
Evan Cheng
ecf0166012 Do not attempt copy coalescing if the source and dest sub-register indices do not match. 
llvm-svn: 103679
 2010-05-12 23:59:42 +00:00
Jakob Stoklund Olesen
955a0e71e9 Make sure to add kill flags to the last use of a virtreg when it is redefined. 
The X86 floating point stack pass and others depend on good kill flags.

llvm-svn: 103635
 2010-05-12 18:46:03 +00:00
Duncan Sands
2576db727b Remove unused variable. Tweak a comment while there. 
llvm-svn: 103586
 2010-05-12 07:11:33 +00:00
Nathan Jeffords
76a07580ad updated support for the COFF .linkonce 
Now, the .linkonce directive is emitted as part of MCSectionCOFF::PrintSwitchToSection instead of AsmPrinter::EmitLinkage since it is an attribute of the section the symbol was placed into not the symbol itself.

llvm-svn: 103568
 2010-05-12 04:26:09 +00:00
Evan Cheng
d593448643 Teach local regalloc about virtual registers with sub-indices. 
llvm-svn: 103539
 2010-05-12 01:29:36 +00:00
Evan Cheng
0c6ebc7d95 Code clean up. 
llvm-svn: 103538
 2010-05-12 01:27:49 +00:00
Jakob Stoklund Olesen
f98a355f9b Avoid scoping issues, fix buildbots 
llvm-svn: 103530
 2010-05-12 00:11:19 +00:00
Dan Gohman
1a1b51ff59 Add initial kill flag support to FastISel. 
llvm-svn: 103529
 2010-05-11 23:54:07 +00:00
Daniel Dunbar
69b8f42400 Make Clang happy. 
llvm-svn: 103528
 2010-05-11 23:53:13 +00:00
Jakob Stoklund Olesen
11f1ba1535 Store the Dirty bit in the LiveReg structure instead of a bit vector. 
llvm-svn: 103522
 2010-05-11 23:24:47 +00:00
Jakob Stoklund Olesen
132668102e Keep track of the last place a live virtreg was used. 
This allows us to add accurate kill markers, something the scavenger likes.
Add some more tests from ARM that needed this.

llvm-svn: 103521
 2010-05-11 23:24:45 +00:00
Dan Gohman
afd2b8bbb7 Don't set kill flags on uses of CopyFromReg nodes. InstrEmitter doesn't 
create separate virtual registers for CopyFromReg values, so uses of
them don't necessarily kill the value.

llvm-svn: 103519
 2010-05-11 21:59:14 +00:00
Jakob Stoklund Olesen
f25be99109 Silence warning 
llvm-svn: 103508
 2010-05-11 20:51:04 +00:00
Jakob Stoklund Olesen
3f0241e0f9 Simplify the tracking of used physregs to a bulk bitor followed by a transitive 
closure after allocating all blocks.

Add a few more test cases for -regalloc=fast.

llvm-svn: 103500
 2010-05-11 20:30:28 +00:00
Duncan Sands
6c5e4355bb 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
Dan Gohman
9132c59d43 Trim #includes and forward declarations. 
llvm-svn: 103489
 2010-05-11 19:11:43 +00:00
Jakob Stoklund Olesen
f1b3029a54 Mostly rewrite RegAllocFast. 
Sorry for the big change. The path leading up to this patch had some TableGen
changes that I didn't want to commit before I knew they were useful. They
weren't, and this version does not need them.

The fast register allocator now does no liveness calculations. Instead it relies
on kill flags provided by isel. (Currently those kill flags are also ignored due
to isel bugs). The allocation algorithm is supposed to work with any subset of
valid kill flags. More kill flags simply means fewer spills inserted.

Registers are allocated from a working set that contains no aliases. That means
most allocations can be done directly without expensive alias checks. When the
working set runs out of registers we do the full alias check to find new free
registers.

llvm-svn: 103488
 2010-05-11 18:54:45 +00:00
Dan Gohman
bb919dfb6b Implement a bunch more TargetSelectionDAGInfo infrastructure. 
Move EmitTargetCodeForMemcpy, EmitTargetCodeForMemset, and
EmitTargetCodeForMemmove out of TargetLowering and into
SelectionDAGInfo to exercise this.

llvm-svn: 103481
 2010-05-11 17:31:57 +00:00
Douglas Gregor
6739a89117 Fixes for Microsoft Visual Studio 2010, from Steven Watanabe! 
llvm-svn: 103457
 2010-05-11 06:17:44 +00:00
Evan Cheng
1ef0660836 It's not safe eliminate copies where src and dst have different sub-register indices. 
llvm-svn: 103450
 2010-05-11 00:20:03 +00:00
Evan Cheng
b58b6f9a85 Ensure REG_SEQUENCE source operands are unique. 
llvm-svn: 103449
 2010-05-11 00:04:31 +00:00
Evan Cheng
ffb9f18dfe Indentation. 
llvm-svn: 103441
 2010-05-10 23:08:19 +00:00
Devang Patel
1a0df9a80e Enable multiple Compile Units in one module. 
This means now 'llvm-ld a.bc b.bc' will preserve debug info appropriately.

llvm-svn: 103439
 2010-05-10 22:49:55 +00:00
Evan Cheng
d6908dc4a2 It's not safe to propagate implicit_def that defines part of a register. 
llvm-svn: 103436
 2010-05-10 21:25:30 +00:00
Evan Cheng
9d55b23425 Clear RegSequences vector after eliminating REG_SEQUENCE instructions. 
llvm-svn: 103435
 2010-05-10 21:24:55 +00:00
Evan Cheng
02947a4551 Be careful with operand promotion. For a binary operation, the source operands may be the same. PR7018. rdar://7939869. 
llvm-svn: 103419
 2010-05-10 19:03:57 +00:00
Evan Cheng
faef5d0281 Re-defined valno is always valno even for partial re-def's. 
llvm-svn: 103410
 2010-05-10 17:33:49 +00:00
Bob Wilson
01fcdaa7f5 Fix PR7096. When a block containing multiple defs is tail duplicated, the 
SSAUpdater for the value from the first def may see uses of undefined values,
because the later defs will not have been updated yet.

llvm-svn: 103407
 2010-05-10 17:14:26 +00:00
Duncan Sands
e4d6670f6b Add an assertion to catch attempts to access off the end of the array. 
Based on a patch by Javier Martinez.

llvm-svn: 103391
 2010-05-10 04:54:28 +00:00
Devang Patel
0625af2a88 Instead of just verifying compile unit, verify entire type, variable, namespace etc.. 
llvm-svn: 103327
 2010-05-07 23:33:41 +00:00
Devang Patel
cbe7a8508a Remove DIGlobal. 
llvm-svn: 103325
 2010-05-07 23:19:07 +00:00
Dan Gohman
7de01ec2c9 SDDbgValues are apparently not being legalized. Fix a symptom of the problem, 
and not the real problem itself, by dropping debug info for i128 values.
rdar://7958162.

llvm-svn: 103310
 2010-05-07 22:19:08 +00:00
Devang Patel
2ae3397536 Verify variable directly. 
llvm-svn: 103305
 2010-05-07 22:04:20 +00:00
Chris Lattner
028449325b add COFF support for COMDAT sections, patch by Nathan Jeffords! 
llvm-svn: 103304
 2010-05-07 21:49:09 +00:00
Devang Patel
8d6a2b7428 Verify entire type descriptor not just tag. 
llvm-svn: 103303
 2010-05-07 21:45:47 +00:00
Dale Johannesen
51c1695a0a Fix PR 7087, and probably other things, by extending 
getConstantFP to accept the two supported long double
target types.  This was not the original intent, but
there are other places that assume this works and it's
easy enough to do.

llvm-svn: 103299
 2010-05-07 21:35:53 +00:00
Devang Patel
32cc43c242 Wrap const MDNode * inside DIDescriptor. 
llvm-svn: 103295
 2010-05-07 20:54:48 +00:00
Devang Patel
cfa8e9d45f Avoid DIDescriptor::getNode(). Use overloaded operators instead. 
llvm-svn: 103272
 2010-05-07 18:11:54 +00:00
Chris Lattner
87cffa9498 switch MCSectionCOFF from a syntactic to semantic representation, 
patch by Peter Housel!

llvm-svn: 103267
 2010-05-07 17:17:41 +00:00
Nick Lewycky
45f530db39 Revert r103133 and add testcase from PR7066. 
llvm-svn: 103233
 2010-05-07 01:45:38 +00:00
Dan Gohman
e6d40166a8 Transfer debug location information from PHI nodes to resulting 
lowered copies.

llvm-svn: 103228
 2010-05-07 01:10:20 +00:00
Dan Gohman
e7dff14d5d Print debug information for SDNodes. 
llvm-svn: 103227
 2010-05-07 01:09:21 +00:00
Dan Gohman
7421ae48bf Disable the new unknown-location code for now. It causes a major 
increase in the debug line info section, and it's causing
regressions in a gdb testsuite.

llvm-svn: 103226
 2010-05-07 01:08:53 +00:00
Dan Gohman
779c69bbc5 Add a DebugLoc argument to TargetInstrInfo::copyRegToReg, so that it 
doesn't have to guess.

llvm-svn: 103194
 2010-05-06 20:33:48 +00:00
Evan Cheng
efb126a665 Add argument TargetRegisterInfo to loadRegFromStackSlot and storeRegToStackSlot. 
llvm-svn: 103193
 2010-05-06 19:06:44 +00:00