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28232 Commits

Author SHA1 Message Date
Evan Cheng
984da04cd0 Enable stack coloring with regs at -O3. 
llvm-svn: 71010
 2009-05-05 20:30:36 +00:00
David Greene
2bb2b3840e Handle overflow of 64-bit loop conditions. 
llvm-svn: 71008
 2009-05-05 20:22:36 +00:00
Chris Lattner
5cc9a36d1c Add basic support for code generation of 
addrspace(257) -> FS relative on x86.  Patch by Zoltan Varga!

llvm-svn: 70992
 2009-05-05 18:52:19 +00:00
Evan Cheng
138eed76c7 Revert part of 70929 that has to do with determining whether a SIB byte is needed. It causes a lot of x86_64 JIT failures. 
llvm-svn: 70986
 2009-05-05 18:18:57 +00:00
Chris Lattner
a96ef42a06 Do not require variable debug info nodes to have a compile unit. 
For implicit decls like "self" and "_cmd" in ObjC, these decls
should not have a location.

llvm-svn: 70964
 2009-05-05 04:55:56 +00:00
Evan Cheng
77e14276e0 Do not substitute if the new register isn't in the register class of the operand being updated. 
llvm-svn: 70953
 2009-05-05 00:46:16 +00:00
Evan Cheng
95ce4ffb36 Move getInstrOperandRegClass from the scheduler to TargetInstrInfo. 
llvm-svn: 70950
 2009-05-05 00:30:09 +00:00
Evan Cheng
ecfc8e8464 Do forward and backward substitution to eliminate loads and stores when possible. 
llvm-svn: 70937
 2009-05-04 23:13:13 +00:00
Evan Cheng
6843d3293b - Avoid the longer SIB encoding on x86_64 when it's not needed. 
- Synchronize instruction length computation code in X86InstrInfo with code in X86CodeEmitter.cpp
Patch by Zoltan Varga.

llvm-svn: 70929
 2009-05-04 22:49:16 +00:00
Dan Gohman
00c4ac3add Re-apply 70645, converting ScalarEvolution to use 
CallbackVH, with fixes. allUsesReplacedWith need to
walk the def-use chains and invalidate all users of a
value that is replaced. SCEVs of users need to be
recalcualted even if the new value is equivalent. Also,
make forgetLoopPHIs walk def-use chains, since any
SCEV that depends on a PHI should be recalculated when
more information about that PHI becomes available.

llvm-svn: 70927
 2009-05-04 22:30:44 +00:00
Dan Gohman
eecaa636fb Fix an 80-column violation. 
llvm-svn: 70925
 2009-05-04 22:23:18 +00:00
Dan Gohman
6bfe85b985 Fix doxygen comment syntax. 
llvm-svn: 70924
 2009-05-04 22:20:30 +00:00
Chris Lattner
7e3c94b55e Make DBG_STOPPOINT nodes, and therefore DBG_LABEL labels, get a DebugLoc, so that it 
shows up in -print-machineinstrs.  This doesn't appear to affect anything, but it was
weird for some DBG_LABELs to have DebugLocs but not all of them.

llvm-svn: 70921
 2009-05-04 22:10:05 +00:00
Dan Gohman
6c425d29e7 Constify a bunch of SCEV-using code. 
llvm-svn: 70919
 2009-05-04 22:02:23 +00:00
Dan Gohman
2973567a95 X86FastISel doesn't support the -tailcallopt ABI. 
llvm-svn: 70902
 2009-05-04 19:50:33 +00:00
Argyrios Kyrtzidis
f82d02a6ca Restore a comment. 
llvm-svn: 70900
 2009-05-04 19:23:45 +00:00
Anton Korobeynikov
262a397978 Fix code emission for conditional branches. 
Patch by Collin Winter!

llvm-svn: 70898
 2009-05-04 19:10:38 +00:00
Dan Gohman
f8f167320d Use true instead of 1 for a boolean value. And fix a copy+pasto 
in a comment.

llvm-svn: 70882
 2009-05-04 17:25:21 +00:00
Dan Gohman
83dfa97326 Trim unnecessary #includes. 
llvm-svn: 70880
 2009-05-04 17:11:06 +00:00
Duncan Sands
4c7021febf Teach capture tracking that readonly functions can 
only capture their arguments by returning them or
throwing an exception or not based on the argument
value.  Patch essentially by Frits van Bommel.

llvm-svn: 70876
 2009-05-04 16:50:29 +00:00
Chris Lattner
84cf4d62a8 fix some problems spotted by Duncan and Nicolas Geoffray 
llvm-svn: 70872
 2009-05-04 16:29:24 +00:00
Argyrios Kyrtzidis
fb958c2b09 -Remove the DwarfWriter::RecordSourceLine calls from the instruction selectors. 
-Depend on DebugLocs for source line info.

(Comes with Regression-Be-Gone(tm))

llvm-svn: 70871
 2009-05-04 16:23:49 +00:00
Evan Cheng
9df9768ee5 Make sure to color with only allocatable registers for the specific register class. 
llvm-svn: 70821
 2009-05-04 03:30:11 +00:00
Chris Lattner
6807ddd3d9 * Sink 4 duplicates of edge threading validity checks and DOUT prints into 
ThreadEdge directly.  This shares the code, but is just a refactoring.
* Make JumpThreading compute the set of loop headers and avoid threading
  across them.  This prevents jump threading from forming irreducible 
  loops (goodness) but also prevents it from threading in other cases that
  are beneficial (see the comment above FindFunctionBackedges).

llvm-svn: 70820
 2009-05-04 02:28:08 +00:00
Chris Lattner
b07d558841 Factor loop backedge finding out of CodeGenPrepare into a new 
FindFunctionBackedges function.

llvm-svn: 70819
 2009-05-04 02:25:58 +00:00
Evan Cheng
bb12bac53b The stack slots which share the same stack slot after coloring can, but do not have to, use the same register. In fact, they each may have different register class requirements. 
llvm-svn: 70815
 2009-05-04 00:24:50 +00:00
Argyrios Kyrtzidis
e68261749e Revert r70803 for now, it causes a regression. 
llvm-svn: 70811
 2009-05-03 23:27:19 +00:00
Argyrios Kyrtzidis
bb6e4d027c -Remove the DwarfWriter::RecordSourceLine calls from the instruction selectors. 
-Depend on DebugLocs for source line info.

llvm-svn: 70803
 2009-05-03 22:03:35 +00:00
Evan Cheng
a64d6b8822 Typo. 
llvm-svn: 70792
 2009-05-03 19:10:11 +00:00
Evan Cheng
28aa6c41d1 In some rare cases, the register allocator can spill registers but end up not utilizing registers at all. The fundamental problem is linearscan's backtracking can end up freeing more than one allocated registers. However, reloads and restores might be folded into uses / defs and freed registers might not be used at all. 
VirtRegMap keeps track of allocations so it knows what's not used. As a horrible hack, the stack coloring can color spill slots with *free* registers. That is, it replace reload and spills with copies from and to the free register. It unfold instructions that load and store the spill slot and replace them with register using variants.

Not yet enabled. This is part 1. More coming.

llvm-svn: 70787
 2009-05-03 18:32:42 +00:00
Anton Korobeynikov
df33e5a803 Handle implicit zext in a better way. Shamelessly stolen from x86 backend. 
Thanks for Dan Gohman for suggestion!

llvm-svn: 70782
 2009-05-03 15:50:18 +00:00
Anton Korobeynikov
15587901c3 Fix typo 
llvm-svn: 70770
 2009-05-03 13:19:57 +00:00
Anton Korobeynikov
46a92ec4d6 Update due to mainline API change 
llvm-svn: 70769
 2009-05-03 13:19:42 +00:00
Anton Korobeynikov
13ed1c4514 Add TODO list :) 
llvm-svn: 70768
 2009-05-03 13:19:24 +00:00
Anton Korobeynikov
8988fea464 Make handling of conditional stuff much more straightforward 
llvm-svn: 70767
 2009-05-03 13:19:09 +00:00
Anton Korobeynikov
d8c42b2dee Temporary disable imm patterns for cmp. Actually, all cmp-related stuff (select_cc, setcc, br_cc). needs to be rethought 
llvm-svn: 70766
 2009-05-03 13:18:50 +00:00
Anton Korobeynikov
e6c8cc6c51 Expand divisions into libcalls 
llvm-svn: 70765
 2009-05-03 13:18:33 +00:00
Anton Korobeynikov
34d22f34a8 Properly handle sdiv / udiv / srem / urem libcalls 
llvm-svn: 70764
 2009-05-03 13:18:16 +00:00
Anton Korobeynikov
54bbd77498 Custom lower SIGN_EXTEND 
llvm-svn: 70763
 2009-05-03 13:17:49 +00:00
Anton Korobeynikov
9103796e69 Some eye-candy 
llvm-svn: 70762
 2009-05-03 13:17:31 +00:00
Anton Korobeynikov
c0ea294fb9 Print function header / footer 
llvm-svn: 70761
 2009-05-03 13:17:11 +00:00
Anton Korobeynikov
f4b4812c83 Fix printing: je => jeq 
llvm-svn: 70760
 2009-05-03 13:16:54 +00:00
Anton Korobeynikov
4b5232c990 Add 8bit shifts 
llvm-svn: 70759
 2009-05-03 13:16:37 +00:00
Anton Korobeynikov
d0e3939bdf Handle logical shift right (at least I hope so :) ) 
llvm-svn: 70758
 2009-05-03 13:16:17 +00:00
Anton Korobeynikov
7dd27f2e41 Handle anyext 
llvm-svn: 70757
 2009-05-03 13:15:57 +00:00
Anton Korobeynikov
baf9278166 Expand all sorts of indirect branches 
llvm-svn: 70755
 2009-05-03 13:15:40 +00:00
Anton Korobeynikov
806b8efb5e Add InsertBranch() hook for tail mergeing 
llvm-svn: 70754
 2009-05-03 13:15:22 +00:00
Anton Korobeynikov
b97b120cf9 Implement bswap 
llvm-svn: 70753
 2009-05-03 13:15:03 +00:00
Anton Korobeynikov
cebc97d79c Properly handle ExternalSymbol's 
llvm-svn: 70752
 2009-05-03 13:14:46 +00:00
Anton Korobeynikov
9b84c6b633 Expand muls (all mulls!) to libcalls for now 
llvm-svn: 70751
 2009-05-03 13:14:25 +00:00