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12934 Commits

Author SHA1 Message Date
Duncan Sands
6b0ed93a81 Pull a few more simplifications out of instcombine (there are still 
plenty left though!), in particular for multiplication.

llvm-svn: 122330
 2010-12-21 14:00:22 +00:00
Rafael Espindola
e0e966982a Layout one section until no relaxations are done and then move to the next 
section.

This helps because in practice sections form a dag with debug sections pointing
to text sections. Finishing up the text sections first makes the debug section
relaxation trivial.

llvm-svn: 122314
 2010-12-21 04:22:09 +00:00
Chris Lattner
65c5243bd6 rename MVT::Flag to MVT::Glue. "Flag" is a terrible name for 
something that just glues two nodes together, even if it is
sometimes used for flags.

llvm-svn: 122310
 2010-12-21 02:38:05 +00:00
Jakob Stoklund Olesen
86786c46c2 Use IntEqClasses to compute connected components of live intervals. 
llvm-svn: 122296
 2010-12-21 00:48:17 +00:00
Jakob Stoklund Olesen
26b4e8ec0a Add ADT/IntEqClasses.h as a light-weight implementation of EquivalenceClasses.h. 
This implementation already exists as ConnectedVNInfoEqClasses in
LiveInterval.cpp, and it seems to be generally useful to have a light-weight way
of forming equivalence classes of small integers.

IntEqClasses doesn't allow enumeration of the elements in a class.

llvm-svn: 122293
 2010-12-21 00:04:46 +00:00
Owen Anderson
c1eee5ac49 Revert r122114 (CallbackVH observing use-list changes) because it caused severe slowdowns on the Linux self-host configuration. 
llvm-svn: 122279
 2010-12-20 22:28:03 +00:00
Bill Wendling
265b7b81b6 This is still used and issuing an annoying warning. Don't deprecate something in 
the library unless *all* uses have been converted over to the new form.

llvm-svn: 122267
 2010-12-20 21:14:18 +00:00
Duncan Sands
09fbb211eb Add a new convenience pass for testing InstructionSimplify. Previously 
it could only be tested indirectly, via instcombine, gvn or some other
pass that makes use of InstructionSimplify, which means that testcases
had to be carefully contrived to dance around any other transformations
that that pass did.

llvm-svn: 122264
 2010-12-20 20:54:37 +00:00
Michael J. Spencer
4781534e1c Fix spelling. 
llvm-svn: 122244
 2010-12-20 13:30:37 +00:00
Duncan Sands
a37d282962 There is no need for isAssociative to take the type as an argument anymore. 
llvm-svn: 122242
 2010-12-20 13:10:23 +00:00
Duncan Sands
d72bd136f2 Discourage people from using isWeakForLinker when they should be using 
mayBeOverridden.

llvm-svn: 122241
 2010-12-20 10:57:01 +00:00
Chris Lattner
47b7bc98ae update comment. 
llvm-svn: 122212
 2010-12-20 00:56:59 +00:00
Nick Lewycky
de10f6132c Use the new way of silencing this warning. 
llvm-svn: 122195
 2010-12-19 20:57:14 +00:00
Nick Lewycky
c85935836b Add missing standard headers. Patch by Joerg Sonnenberger! 
llvm-svn: 122193
 2010-12-19 20:43:38 +00:00
Chris Lattner
4ce6f60782 add a version of IRBuilder::SetInsertPoint that takes an instruction. 
llvm-svn: 122180
 2010-12-19 19:16:22 +00:00
Chris Lattner
70cfded393 remove dead header 
llvm-svn: 122169
 2010-12-19 04:49:11 +00:00
Michael J. Spencer
0e0c7c269f Support/PathV1: Clarify deprecation warning. 
llvm-svn: 122159
 2010-12-18 22:23:24 +00:00
Michael J. Spencer
4701f704be Support/PathV1: Deprecate get{Basename,Dirname,Suffix}. 
llvm-svn: 122157
 2010-12-18 22:23:07 +00:00
Eric Christopher
4e2b6c0e28 Header warning patrol. 
llvm-svn: 122152
 2010-12-18 10:54:29 +00:00
Roman Divacky
ed5bb14415 Add support for lexing single quotes like 'c'. 
This fixed 8615.

llvm-svn: 122150
 2010-12-18 08:56:37 +00:00
Owen Anderson
7103acd18e Revert r122143 through r122140, which collectively broke the LLVMC tests on 
the buildbots.

llvm-svn: 122149
 2010-12-18 07:37:18 +00:00
Rafael Espindola
df98fb74f6 Merge isAbsolute into IsSymbolRefDifferenceFullyResolved. 
llvm-svn: 122148
 2010-12-18 06:27:54 +00:00
Rafael Espindola
7f9be9e112 Remove the MCObjectFormat class. 
llvm-svn: 122147
 2010-12-18 05:37:28 +00:00
Michael J. Spencer
b70c703b01 Support/PathV1: Clarify deprecation warning. 
llvm-svn: 122143
 2010-12-18 04:13:54 +00:00
Michael J. Spencer
6d64a36ced Support/PathV1: Deprecate get{Basename,Dirname,Suffix}. 
llvm-svn: 122141
 2010-12-18 04:13:36 +00:00
Rafael Espindola
f3aeaaa3f4 Revert 122011, 122012, 122013, 122023 adding back an important optimization. 
I added a note, but suggestions on how to add a test are really welcome.

llvm-svn: 122138
 2010-12-18 03:57:21 +00:00
Rafael Espindola
9a4bfd7755 Move some data to the TargetWriter. 
llvm-svn: 122134
 2010-12-18 03:27:34 +00:00
Michael J. Spencer
bb238417bb Support/PathV1: Deprecate getLast. 
llvm-svn: 122116
 2010-12-18 00:19:10 +00:00
Owen Anderson
702d715185 Add support to CallbackVH to receive notification when a Value's use-list changes. 
llvm-svn: 122114
 2010-12-18 00:07:15 +00:00
Jakob Stoklund Olesen
2879da5e13 Pass a Banner argument to the machine code verifier both from 
createMachineVerifierPass and MachineFunction::verify.

The banner is printed before the machine code dump, just like the printer pass.

llvm-svn: 122113
 2010-12-18 00:06:56 +00:00
Jakob Stoklund Olesen
6498db2c8c Avoid dereferencing end() in collectInterferingVRegs() when there is no 
interference.

llvm-svn: 122108
 2010-12-17 23:16:38 +00:00
Jakob Stoklund Olesen
df9e162423 Enable loop splitting in RegAllocGreedy. 
The heuristics split around the largest loop where the current register may be
allocated without interference.

llvm-svn: 122106
 2010-12-17 23:16:32 +00:00
Bill Wendling
c16f9b1ccc During local stack slot allocation, the materializeFrameBaseRegister function 
may be called. If the entry block is empty, the insertion point iterator will be
the "end()" value. Calling ->getParent() on it (among others) causes problems.

Modify materializeFrameBaseRegister to take the machine basic block and insert
the frame base register at the beginning of that block. (It's very similar to
what the code does all ready. The only difference is that it will always insert
at the beginning of the entry block instead of after a previous materialization
of the frame base register. I doubt that that matters here.)

<rdar://problem/8782198>

llvm-svn: 122104
 2010-12-17 23:09:14 +00:00
Jakob Stoklund Olesen
64c013d79d Add more checks to IntervalMapOverlaps::advance() to ensure that advanceTo sees 
monotonic keys.

llvm-svn: 122093
 2010-12-17 22:07:54 +00:00
Jakob Stoklund Olesen
f17722908c It is allowed to call IntervalMap::const_iterator::advanceTo() with a key that 
moves the iterator to end(), and it is valid to call it on end().

That means it is valid to call advanceTo() with any monotonic key sequence.

llvm-svn: 122092
 2010-12-17 22:07:51 +00:00
Michael J. Spencer
bc84ff581f Fix 80 col. 
llvm-svn: 122089
 2010-12-17 21:32:47 +00:00
Michael J. Spencer
f2bf8518fb Support/Path: Deprecate PathV1::isAbsolute. 
llvm-svn: 122086
 2010-12-17 21:21:31 +00:00
Jakob Stoklund Olesen
aec6ae67a1 Fix crash when IntervalMapOverlaps::advanceTo moves past the last overlap. 
llvm-svn: 122081
 2010-12-17 19:18:38 +00:00
Benjamin Kramer
89db30db3a Pass StringRefs by value, for consistency. 
llvm-svn: 122074
 2010-12-17 18:19:06 +00:00
Jakob Stoklund Olesen
f4a0c81371 Add MachineLoopRange comparators for sorting loop lists by number and by area. 
llvm-svn: 122073
 2010-12-17 18:13:52 +00:00
Rafael Espindola
b9ca29bc1c Stub out explicit MCELFObjectTargetWriter interface. 
llvm-svn: 122067
 2010-12-17 17:45:22 +00:00
Michael J. Spencer
63aaa03399 Support: Rename Path.h to PathV1.h and add a new Path.h that includes both V1 and V2. 
llvm-svn: 122065
 2010-12-17 17:22:36 +00:00
Rafael Espindola
38e6fdfd1d Move createELFObjectWriter to its own header. 
llvm-svn: 122064
 2010-12-17 16:59:53 +00:00
Chris Lattner
e92f8121d4 improve switch formation to handle small range 
comparisons formed by comparisons.  For example,
this:

void foo(unsigned x) {
  if (x == 0 || x == 1 || x == 3 || x == 4 || x == 6) 
    bar();
}

compiles into:

_foo:                                   ## @foo
## BB#0:                                ## %entry
	cmpl	$6, %edi
	ja	LBB0_2
## BB#1:                                ## %entry
	movl	%edi, %eax
	movl	$91, %ecx
	btq	%rax, %rcx
	jb	LBB0_3

instead of:

_foo:                                   ## @foo
## BB#0:                                ## %entry
	cmpl	$2, %edi
	jb	LBB0_4
## BB#1:                                ## %switch.early.test
	cmpl	$6, %edi
	ja	LBB0_3
## BB#2:                                ## %switch.early.test
	movl	%edi, %eax
	movl	$88, %ecx
	btq	%rax, %rcx
	jb	LBB0_4

This catches a bunch of cases in GCC, which look like this:

 %804 = load i32* @which_alternative, align 4, !tbaa !0
 %805 = icmp ult i32 %804, 2
 %806 = icmp eq i32 %804, 3
 %or.cond121 = or i1 %805, %806
 %807 = icmp eq i32 %804, 4
 %or.cond124 = or i1 %or.cond121, %807
 br i1 %or.cond124, label %.thread, label %808

turning this into a range comparison.

llvm-svn: 122045
 2010-12-17 06:20:15 +00:00
Daniel Dunbar
6979fc1057 MC/Mach-O: On second thought, use a custom hook for enabling aggressive 
IsSymbolRefDifferenceFullyResolved, it turns out this does change behavior on
enough cases for x86-32 that I would rather wait a bit on it.
 - In practice, we will want to change this eventually because it only means we
   generate less relocations (it also eliminates the need for the horrible
   '.set' hack that Darwin requires in some places).

llvm-svn: 122042
 2010-12-17 05:50:29 +00:00
Daniel Dunbar
2caf23b5a9 MC/ObjectWriter: Add a new IsSymbolRefDifferenceFullyResolved target format specific hook. 
- Currently just has stub implementations for Mach-O, ELF, and COFF.

llvm-svn: 122037
 2010-12-17 04:54:54 +00:00
Jakob Stoklund Olesen
40f23cd5ca Provide LiveIntervalUnion::Query::checkLoopInterference. 
This is a three-way interval list intersection between a virtual register, a
live interval union, and a loop. It will be used to identify interference-free
loops for live range splitting.

llvm-svn: 122034
 2010-12-17 04:09:47 +00:00
Daniel Dunbar
f77af712b7 MC/Assembler: Strip out object writer arguments, now that it is always available 
-- and remove FIXME asking for the same!

llvm-svn: 122032
 2010-12-17 02:45:59 +00:00
Daniel Dunbar
54b3f3e5db MC/Assembler: Make the MCObjectWriter available through the lifetime of the 
assembler.

llvm-svn: 122031
 2010-12-17 02:45:41 +00:00
Daniel Dunbar
6d4a3e98f3 MC/Target: Remove HasScatteredSymbols target hook variable, which has been 
superceded and was effectively dead.

llvm-svn: 122024
 2010-12-17 02:06:08 +00:00