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dbbbf73c96bcbf1ffd712fdb2fd2be70c5ada8da
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9903 Commits

Author SHA1 Message Date
Eli Friedman
dbbbf73c96 Implement expansion in type legalization for add/sub with overflow. The 
expansion is the same as that used by LegalizeDAG.

The resulting code sucks in terms of performance/codesize on x86-32 for a
64-bit operation; I haven't looked into whether different expansions might be
better in general.

llvm-svn: 105378
 2010-06-03 03:49:50 +00:00
Jakob Stoklund Olesen
4029596f93 Use the fast register allocator by default for -O0 builds. 
This affects both llvm-gcc and clang.

llvm-svn: 105372
 2010-06-03 00:39:06 +00:00
Jakob Stoklund Olesen
818e4df2b4 Use readsWritesVirtualRegister instead of counting uses and defs when inserting 
spills and reloads.

This means that a partial define of a register causes a reload so the other
parts of the register are preserved.

The reload can be prevented by adding an <imp-def> operand for the full
register. This is already done by the coalescer and live interval analysis where
relevant.

llvm-svn: 105369
 2010-06-03 00:07:47 +00:00
Jakob Stoklund Olesen
42c642cd24 Add full register <imp-def> operands when the coalescer is creating partial 
register updates.

These operands tell the spiller that the other parts of the partially defined
register are don't-care, and a reload is not necessary.

llvm-svn: 105361
 2010-06-02 23:22:11 +00:00
Bill Wendling
7ee730eb40 Compulsive reformating. No functionalitical changes. 
llvm-svn: 105359
 2010-06-02 23:04:26 +00:00
Jakob Stoklund Olesen
a8ad97743d Slightly change the meaning of the reMaterialize target hook when the original 
instruction defines subregisters.

Any existing subreg indices on the original instruction are preserved or
composed with the new subreg index.

Also substitute multiple operands mentioning the original register by using the
new MachineInstr::substituteRegister() function. This is necessary because there
will soon be <imp-def> operands added to non read-modify-write partial
definitions. This instruction:

  %reg1234:foo = FLAP %reg1234<imp-def>

will reMaterialize(%reg3333, bar) like this:

  %reg3333:bar-foo = FLAP %reg333:bar<imp-def>

Finally, replace the TargetRegisterInfo pointer argument with a reference to
indicate that it cannot be NULL.

llvm-svn: 105358
 2010-06-02 22:47:25 +00:00
Rafael Espindola
f2dffcef82 Remove the TargetRegisterClass member from CalleeSavedInfo 
llvm-svn: 105344
 2010-06-02 20:02:30 +00:00
Devang Patel
c2254f6b98 Skip identical instruction while calculating DBG_VALUE range. 
llvm-svn: 105340
 2010-06-02 19:05:13 +00:00
Bob Wilson
2d35a9e810 Rename canCombinedSubRegIndex method to something more grammatically correct 
and tidy up the comment describing it.

llvm-svn: 105339
 2010-06-02 18:54:47 +00:00
Devang Patel
21ccf05b4c Use local small vector. 
llvm-svn: 105332
 2010-06-02 16:42:51 +00:00
Jim Grosbach
848548300d Not all entries in the range will have an SUnit. Check for that when looking 
for debug information.

llvm-svn: 105324
 2010-06-02 15:29:36 +00:00
Rafael Espindola
c08ecba597 Remove uses of getCalleeSavedRegClasses from outside the 
backends and removes the virtual declaration. With that out of the way
I should be able to cleanup one backend at a time.

llvm-svn: 105321
 2010-06-02 12:39:06 +00:00
Evan Cheng
a2da22734f Enable machine cse of instructions which define physical registers. 
llvm-svn: 105308
 2010-06-02 01:08:27 +00:00
Bob Wilson
f4a34b97b8 Fix an obvious mistake: don't change the operands until all of them have been 
checked and it is safe to proceed with the changes.

llvm-svn: 105304
 2010-06-02 00:16:08 +00:00
Jim Grosbach
12ac8f0352 Update debug information when breaking anti-dependencies. rdar://7759363 
llvm-svn: 105300
 2010-06-01 23:48:44 +00:00
Jakob Stoklund Olesen
7b0ac865a4 Properly compose subregister indices when coalescing. 
The comment about ordering of subreg indices is no longer true.
This exposed a bug in the new substVirtReg method that is also fixed.

llvm-svn: 105294
 2010-06-01 22:39:25 +00:00
Devang Patel
d43e0ca916 Ignore line number of debug value in undefined register. 
llvm-svn: 105292
 2010-06-01 21:43:09 +00:00
Devang Patel
b0c76394a3 Keep track of incoming debug value of unused argument. 
Radar 7927666.

llvm-svn: 105285
 2010-06-01 19:59:01 +00:00
Dan Gohman
b782caa393 Fill in missing support for ISD::FEXP, ISD::FPOWI, and friends. 
llvm-svn: 105283
 2010-06-01 18:35:14 +00:00
Jim Grosbach
b24d5c6ce2 Add a FIXME 
llvm-svn: 105282
 2010-06-01 18:06:35 +00:00
Jim Grosbach
74d8345512 When processing function arguments when splitting live ranges across invokes, 
handle structs passed by value via an extract/insert pair, as a bitcast
won't work on a struct. rdar://7742824

llvm-svn: 105280
 2010-06-01 18:04:09 +00:00
Chris Lattner
14c46517b5 fix PR6623: when optimizing for size, don't inline memcpy/memsets 
that are too large.  This causes the freebsd bootloader to be too
large apparently.

It's unclear if this should be an -Os or -Oz thing.  Thoughts welcome.

llvm-svn: 105228
 2010-05-31 17:30:14 +00:00
Chris Lattner
b4a773b452 the 'limit' argument to FindOptimalMemOpLowering is unsigned, not uint64_t. 
llvm-svn: 105226
 2010-05-31 17:12:23 +00:00
Oscar Fuentes
a97311f152 Use llvm::next' instead of next' to make VC++ 2010 happy. 
llvm-svn: 105168
 2010-05-30 13:14:21 +00:00
Dan Gohman
4db93c9700 Reorder some code in SelectionDAGBuilder. 
llvm-svn: 105105
 2010-05-29 17:53:24 +00:00
Dan Gohman
d16aa541af 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
Benjamin Kramer
c488e92f0b Remove unused function. 
llvm-svn: 105100
 2010-05-29 14:03:51 +00:00
Evan Cheng
707b7cc429 Remove schedule-livein-copies. It's not being used. 
llvm-svn: 105095
 2010-05-29 02:23:39 +00:00
Jakob Stoklund Olesen
ab6223949e Handle composed subreg indices when processing REQ_SEQUENCE instructions. 
llvm-svn: 105066
 2010-05-29 00:14:14 +00:00
Evan Cheng
032f3261a2 Doh. Machine LICM is re-initializing the CSE map over and over. Patch by Anna Zaks. rdar://8037934. 
llvm-svn: 105065
 2010-05-29 00:06:36 +00:00
Evan Cheng
cc2efe11db Fix some latency computation bugs: if the use is not a machine opcode do not just return zero. 
llvm-svn: 105061
 2010-05-28 23:26:21 +00:00
Jakob Stoklund Olesen
64824ea99f Add a TargetRegisterInfo::composeSubRegIndices hook with a default 
implementation that is correct for most targets. Tablegen will override where
needed.

Add MachineOperand::subst{Virt,Phys}Reg methods that correctly handle existing
subreg indices when sustituting registers.

llvm-svn: 104985
 2010-05-28 18:18:53 +00:00
Stuart Hastings
c1e216583f Revert 104841, 104842, 104876 due to buildbot failures. Radar 7424645. 
llvm-svn: 104953
 2010-05-28 16:41:07 +00:00
Dan Gohman
2140a74979 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
Jakob Stoklund Olesen
b613ae2c89 Add a -regalloc=default option that chooses a register allocator based on the -O 
optimization level.

This only really affects llc for now because both the llvm-gcc and clang front
ends override the default register allocator. I intend to remove that code later.

llvm-svn: 104904
 2010-05-27 23:57:25 +00:00
Jim Grosbach
faa3abbe39 Update the saved stack pointer in the sjlj function context following either 
an alloca() or an llvm.stackrestore(). rdar://8031573

llvm-svn: 104900
 2010-05-27 23:49:24 +00:00
Jim Grosbach
c9f532dddc back out 104862/104869. Can reuse stacksave after all. Very cool. 
llvm-svn: 104897
 2010-05-27 23:11:57 +00:00
Devang Patel
7a9dedf0ab Do not drop location info for inlined function args. 
llvm-svn: 104884
 2010-05-27 20:25:04 +00:00
Jim Grosbach
b68dfb45f5 hook ISD::STACKADDR to an intrinsic 
llvm-svn: 104869
 2010-05-27 18:52:11 +00:00
Devang Patel
5e6b71ce34 inlined function's arguments need a label to mark the start point because they are not directly attached to current function. 
llvm-svn: 104848
 2010-05-27 16:47:30 +00:00
Stuart Hastings
8e99e50d08 Support for nested functions/classes in debug output. Radar 7424645. 
llvm-svn: 104841
 2010-05-27 16:16:54 +00:00
Devang Patel
6b9a9fe207 Simplify. Eliminate unneeded debug_loc entry. 
llvm-svn: 104785
 2010-05-26 23:55:23 +00:00
Bill Wendling
ddee3cb163 Add FIXME comment to remove this. 
llvm-svn: 104749
 2010-05-26 21:53:50 +00:00
Daniel Dunbar
b33dfbcba4 MC: Add TargetMachine support for setting the value of MCRelaxAll with 
-filetype=obj.

llvm-svn: 104747
 2010-05-26 21:48:55 +00:00
Devang Patel
acc32a5c19 There is no need to force an line number entry (using previous location) for a temp label at unknown location. 
llvm-svn: 104740
 2010-05-26 21:23:46 +00:00
Bill Wendling
27311269cb Add "setjmp_syscall", "savectx", "qsetjmp", "vfork", "getcontext" to the list of 
usual suspects that could "return twice".

llvm-svn: 104737
 2010-05-26 20:39:00 +00:00
Jim Grosbach
c98892fdaa 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
Devang Patel
1b08572a66 Update debug info when live-in reg is copied into a vreg. 
llvm-svn: 104732
 2010-05-26 20:18:50 +00:00
Bill Wendling
0c3bfd3fb0 Move the check for "calls setjmp" to SelectionDAGISel so that it can be used by 
more than just the stack slot coloring algorithm.

llvm-svn: 104722
 2010-05-26 19:46:12 +00:00
Devang Patel
002d54ddc9 Identify instructions, that needs a label to mark debug info entity, in advance. This simplifies beginScope(). 
llvm-svn: 104720
 2010-05-26 19:37:24 +00:00