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Author SHA1 Message Date
Jakob Stoklund Olesen
1d0a54cb9d Properly handle multiple definitions of a virtual register in the same 
instruction.

This can happen on ARM:

>> %reg1035:5<def>, %reg1035:6<def> = VLD1q16 %reg1028, 0, pred:14, pred:%reg0
Regs: Q0=%reg1032* R0=%reg1028* R1=%reg1029* R2 R3=%reg1031*
Killing last use: %reg1028
Allocating %reg1035 from QPR
Assigning %reg1035 to Q1
<< %D2<def>, %D3<def> = VLD1q16 %R0<kill>, 0, pred:14, pred:%reg0, %Q1<imp-def>

llvm-svn: 104056
 2010-05-18 21:10:50 +00:00
Dale Johannesen
6b88a14922 Test passed on ppc, to my surprise; if it worked 
there it may work everywhere...

llvm-svn: 104053
 2010-05-18 20:47:04 +00:00
Evan Cheng
dae4e9e4bc Continuously refine the register class of REG_SEQUENCE def with all the source registers and sub-register indices. 
llvm-svn: 104051
 2010-05-18 20:07:47 +00:00
Evan Cheng
9fc34e676d Fix PR7162: Use source register classes and sub-indices to determine the correct register class of the definitions of REG_SEQUENCE. 
llvm-svn: 104050
 2010-05-18 20:03:28 +00:00
Dale Johannesen
00e3e62df1 Testcase for llvm-gcc checkin 104042. 
llvm-svn: 104043
 2010-05-18 19:03:51 +00:00
Kevin Enderby
cd585da505 Incorporate Daniel's suggestion and use !isdigit(CurPtr[0]) and not 
CurPtr[0] == '\n' when testing the character after a "0b" when looking
to see if it part of a something like "jmp 0b".

llvm-svn: 104039
 2010-05-18 18:09:20 +00:00
Kevin Enderby
438a36f66a Fixed the problem with a branch to "0b" that was not parsed by llvm-mc 
correctly.  The Lexer was incorrectly eating the newline casusing it to branch
to address 0.  Updated the test case to use a "0:" label and a branch to "0b".

llvm-svn: 104038
 2010-05-18 17:51:35 +00:00
Jakob Stoklund Olesen
76a5a71473 Teach the machine code verifier to use getSubRegisterRegClass(). 
The old approach was wrong. It had an off-by-one error.

llvm-svn: 104034
 2010-05-18 17:31:12 +00:00
Daniel Dunbar
739e720a21 MC/Mach-O: Implement support for setting indirect symbol table offset in section header. 
Also, create symbol data for LHS of assignment, to match 'as' symbol ordering better.

llvm-svn: 104033
 2010-05-18 17:28:24 +00:00
Daniel Dunbar
9a1bbd9dc5 MC/Mach-O: Remove some FIXMEs. 
llvm-svn: 104032
 2010-05-18 17:28:20 +00:00
Daniel Dunbar
5ed90337ff MC/Mach-O: Fail faster/harder when we see .file, which isn't yet supported. 
llvm-svn: 104031
 2010-05-18 17:28:17 +00:00
Daniel Dunbar
8c20c162fe MC/X86: Implement custom lowering to make sure we match things like 
X86::ADC32ri $0, %eax
to
  X86::ADC32i32 $0

llvm-svn: 104030
 2010-05-18 17:22:24 +00:00
Daniel Dunbar
71107d6099 llc (et al): Add support for --show-encoding and --show-inst. 
llvm-svn: 104029
 2010-05-18 17:22:19 +00:00
Dan Gohman
393fa6e0a2 Usage of O_NONBLOCK in bjam is now confirmed as a bug and fixed upstream. 
Update the comment.

llvm-svn: 104021
 2010-05-18 15:25:14 +00:00
Benjamin Kramer
ad350eb789 Simplify MCContext::(Next|Get)Instance 
- Allocate MCLabels in the context so they don't leak.
- Avoid duplicated densemap lookup.

llvm-svn: 104020
 2010-05-18 12:15:34 +00:00
Alexis Hunt
0774d14741 Replace FIRST_* and LAST_* macros with a generic STMT_RANGE macro 
Also rename ABSTRACT to ABSTRACT_STMT

llvm-svn: 104018
 2010-05-18 06:22:50 +00:00
Evan Cheng
39b5115e93 FIX PR7158. SimplifyVBinOp was asserting when it fails to constant fold (op (build_vector), (build_vector)). 
llvm-svn: 104004
 2010-05-18 00:03:40 +00:00
Jakob Stoklund Olesen
79b683a9bf ARMBaseRegisterInfo::estimateRSStackSizeLimit() could return prematurely with a 
too large limit.

The function would return immediately when finding an addrmode 3/5 instruction.
It needs to keep scanning in case there is an addrmode 6 instruction which drops
the limit to 0.

A test case is very difficult to produce because it will only fail when the
scavenger is used.

rdar://problem/7894847

llvm-svn: 103995
 2010-05-17 23:29:23 +00:00
Evan Cheng
8aa900cf16 Fix PR7175. Insert copies of a REG_SEQUENCE source if it is used by other REG_SEQUENCE instructions. 
llvm-svn: 103994
 2010-05-17 23:24:12 +00:00
Bill Wendling
5a1c9f8d06 - Set the "HasCalls" flag after instruction selection is finished. 
- Change the logic DisableFramePointerElim() to check for the
  -disable-non-leaf-fp-elim before -disable-fp-elim.

llvm-svn: 103990
 2010-05-17 23:09:50 +00:00
Kevin Enderby
14c986967b Added support in MC for Directional Local Labels. 
llvm-svn: 103989
 2010-05-17 23:08:19 +00:00
Eric Christopher
6ea9cf8425 More data/parsing support for tls directives. Add a few more testcases 
and cleanup comments as well.

llvm-svn: 103985
 2010-05-17 22:53:55 +00:00
Evan Cheng
378d6c5d76 Fix PR7156. If the sources of a REG_SEQUENCE are all IMPLICIT_DEF's. Replace it with an IMPLICIT_DEF rather than deleting it or else it would be left without a def. 
llvm-svn: 103984
 2010-05-17 22:09:49 +00:00
Evan Cheng
330b993ede vmov of immediates are trivially re-materializable. 
llvm-svn: 103982
 2010-05-17 21:54:50 +00:00
Daniel Dunbar
b18dfe6cb4 MC/Mach-O/x86: Optimal nop sequences should only be used for the .text sections, not all sections in the text segment. 
llvm-svn: 103981
 2010-05-17 21:54:30 +00:00
Daniel Dunbar
7e141838cd MC: Add dyn_cast support to MCSection. 
- Of questionable utility, since in general anything which wants to do this should probably be within a target specific hook, which can rely on the sections being of the appropriate type. However, it can be useful for short term hacks.

llvm-svn: 103980
 2010-05-17 21:54:26 +00:00
Daniel Dunbar
ee5ac7a69b MC/Mach-O: Reverse order of SymbolData scanning when emitting instructions. 
- This fixes a string table mismatch with 'as' when two new symbols are defined
   in a single instruction.

llvm-svn: 103979
 2010-05-17 21:19:59 +00:00
Jakob Stoklund Olesen
7182505241 Pull the UsedInInstr.test() calls into calcSpillCost() and remember aliases. 
This fixes the miscompilations of MultiSource/Applications/JM/l{en,de}cod.
Clang now successfully self hosts in a debug build with the fast register allocator.

llvm-svn: 103975
 2010-05-17 21:02:08 +00:00
Eric Christopher
380e16a725 Add some section and constant support for darwin TLS. 
llvm-svn: 103974
 2010-05-17 21:02:07 +00:00
Evan Cheng
bb0a4fbe13 Careful with reg_sequence coalescing to not to overwrite sub-register indices. 
llvm-svn: 103971
 2010-05-17 20:57:12 +00:00
Bob Wilson
a748ca62cc Fix a regression in 464.h264 for thumb1 and thumb2 nightly tests. 
Obvious in retrospect but not fun to debug.

llvm-svn: 103969
 2010-05-17 20:31:13 +00:00
Daniel Dunbar
80719b2d36 MC/Mach-O: Fix some differences in symbol flag handling. 
- Don't clear weak reference flag, 'as' was only "trying" to do this, it wasn't
   actually succeeding.
 - Clear the "lazy bound" bit when we mark something external. This corresponds
   roughly to the lazy clearing of the bit that 'as' implements in
   symbol_table_lookup.
 - The exact meaning of these flags appears pretty loose, since 'as' isn't very
   consistent. For now we just try to match 'as', we will clean this up one day
   hopefully.

llvm-svn: 103964
 2010-05-17 20:12:31 +00:00
Jakob Stoklund Olesen
011cea42b9 Optimize empty DenseMap iteration. 
llvm-svn: 103962
 2010-05-17 20:01:24 +00:00
Jakob Stoklund Olesen
7fdbac6a38 Remove debug option. Add comment on spill order determinism. 
llvm-svn: 103961
 2010-05-17 20:01:22 +00:00
Evan Cheng
3bce87c79f Turn on -neon-reg-sequence by default. 
Using NEON load / store multiple instructions will no longer create gobs of vmov of D registers!

llvm-svn: 103960
 2010-05-17 19:51:20 +00:00
Daniel Dunbar
8f5da3624f llvm-mc: Support reassignment of variables in one special case, when the 
variable has not yet been used in an expression. This allows us to support a few
cases that show up in real code (mostly because gcc generates it for Objective-C
on Darwin), without giving up a reasonable semantic model for assignment.

llvm-svn: 103950
 2010-05-17 17:46:23 +00:00
Jakob Stoklund Olesen
c07fd51d56 Avoid allocating the same physreg to multiple virtregs in one instruction. 
While that approach works wonders for register pressure, it tends to break
everything.

This should unbreak the arm-linux builder and fix a number of miscompilations.

llvm-svn: 103946
 2010-05-17 17:18:59 +00:00
Jakob Stoklund Olesen
c97d3f5b78 Minor optimizations. DenseMap::begin() is surprisingly slow on an empty map. 
llvm-svn: 103940
 2010-05-17 15:30:37 +00:00
Jakob Stoklund Olesen
a9f77dbb8f Extract spill cost calculation to a new method, and use definePhysReg() to clear 
out aliases when allocating. Clean up allocVirtReg().

Use calcSpillCost() to allow more aggressive hinting. Now the hint is always
taken unless blocked by a reserved register. This leads to more coalescing,
lower register pressure, and less spilling.

llvm-svn: 103939
 2010-05-17 15:30:32 +00:00
Zhongxing Xu
a44f4d62bc Remove unused member variable. 
llvm-svn: 103936
 2010-05-17 09:47:55 +00:00
Jakob Stoklund Olesen
40545bf117 Only use clairvoyance when defining a register, and then only if it has one use. 
This makes allocation independent on the ordering of use-def chains.

llvm-svn: 103935
 2010-05-17 04:50:57 +00:00
Jakob Stoklund Olesen
f7bef21e58 Eliminate a hash table probe when killing virtual registers. 
llvm-svn: 103934
 2010-05-17 03:26:09 +00:00
Jakob Stoklund Olesen
ab401cc7c3 Execute virtreg kills immediately instead of after processing all uses. 
This is safe to do because the physreg has been marked UsedInInstr and the kill flag will be set on the last operand using the virtreg if there are more then one.

llvm-svn: 103933
 2010-05-17 03:26:06 +00:00
Jakob Stoklund Olesen
f00cf55938 Sprinkle superregister <imp-def> and <imp-kill> operands when dealing with subregister indices. 
llvm-svn: 103931
 2010-05-17 02:49:21 +00:00
Jakob Stoklund Olesen
f9bfd996b3 Now that we don't keep live registers across calls, there is not reason to go 
through the very long list of call-clobbered registers. We just assume all
registers are clobbered.

llvm-svn: 103930
 2010-05-17 02:49:18 +00:00
Jakob Stoklund Olesen
39dbedba34 Boldly attempt consistent capitalization. Functional changes unintended. 
llvm-svn: 103929
 2010-05-17 02:49:15 +00:00
Eric Christopher
950f0d7892 Assume that we'll handle mangling the symbols earlier and just put the 
symbol to the file as we have it.  Simplifies out tbss handling.

llvm-svn: 103928
 2010-05-17 02:13:02 +00:00
Jakob Stoklund Olesen
cfae258409 Spill and kill all virtual registers across a call. 
Debug code doesn't use callee saved registers anyway, and the code is simpler this way. Now spillVirtReg always kills, and the isKill parameter is not needed.

llvm-svn: 103927
 2010-05-17 02:07:32 +00:00
Jakob Stoklund Olesen
ef65f26906 Reduce hashtable probes by using DenseMap::insert() for lookup. 
llvm-svn: 103926
 2010-05-17 02:07:29 +00:00
Jakob Stoklund Olesen
f5593b76bc Make MBB a class member instead of passing it around everywhere. 
llvm-svn: 103925
 2010-05-17 02:07:22 +00:00