Commit Graph

5813 Commits

Author SHA1 Message Date
Owen Anderson c5b45fec6b Use a multimap rather than a map for holding the list of copies to insert, so we don't lose copies when two of them have
the same source.  I don't know what I was thinking when I wrote this originally.
Note: There's probably a more efficient way to do this, but I need to think about it some more, and about what determinism
guarantees need to be present.

llvm-svn: 56964
2008-10-02 19:40:33 +00:00
Dale Johannesen 867d549fce Handle some 64-bit atomics on x86-32, some of the time.
llvm-svn: 56963
2008-10-02 18:53:47 +00:00
Evan Cheng b25f4637dd A Partitioned Boolean Quadratic Programming (PBQP) based register allocator.
Contributed by Lang Hames.

llvm-svn: 56959
2008-10-02 18:29:27 +00:00
Dan Gohman 88536398ff Fix a think-o in isSafeToMove. This fixes it from thinking that
volatile memory references are safe to move.

llvm-svn: 56948
2008-10-02 15:04:30 +00:00
Devang Patel 1b76f2c40b Remove OptimizeForSize global. Use function attribute optsize.
llvm-svn: 56937
2008-10-01 23:18:38 +00:00
Dan Gohman 3b88f10f46 Enable FastISel by default (on x86 and x86-64) with the -fast option.
llvm-svn: 56930
2008-10-01 20:39:19 +00:00
Dan Gohman 1dd27578dd Make some implicit conversions explicit, to avoid compiler warnings.
llvm-svn: 56927
2008-10-01 19:58:59 +00:00
Dan Gohman 94798d31dd Fold trivial two-operand tokenfactors where the operands are equal
immediately.

llvm-svn: 56921
2008-10-01 15:11:19 +00:00
Dan Gohman 3a293e7404 Fix typos in comments.
llvm-svn: 56919
2008-10-01 15:07:49 +00:00
Bill Wendling 68f12ee567 Implement the -fno-builtin option in the front-end, not in the back-end.
llvm-svn: 56900
2008-10-01 00:59:58 +00:00
Owen Anderson 15e6be8cc5 Mark merged-in VNInfo's as being PHIKilled.
llvm-svn: 56893
2008-09-30 23:58:47 +00:00
Owen Anderson f4a36407c7 Fix a simple error in renumbering kill markaers, that took an inordinant amount of time to track down.
llvm-svn: 56889
2008-09-30 22:51:54 +00:00
Bill Wendling e818bc159f - Initialize "--no-builtin" to "false".
- Testcase for r56885.

llvm-svn: 56886
2008-09-30 21:40:30 +00:00
Bill Wendling bd09262e97 Add the new `-no-builtin' flag. This flag is meant to mimic the GCC
`-fno-builtin' flag. Currently, it's used to replace "memset" with "_bzero"
instead of "__bzero" on Darwin10+. This arguably violates the meaning of this
flag, but is currently sufficient. The meaning of this flag should become more
specific over time.

llvm-svn: 56885
2008-09-30 21:22:07 +00:00
Dan Gohman b486350b15 Move the primary fast-isel top-level comments to FastISel.cpp, where
they'll be a little more visible. Also, update and reword them a bit.

llvm-svn: 56877
2008-09-30 20:48:29 +00:00
Dan Gohman 86aa16a69a Optimize SelectionDAG's AssignTopologicalOrder even further.
Completely eliminate the TopOrder std::vector. Instead, sort
the AllNodes list in place. This also eliminates the need to
call AllNodes.size(), a linear-time operation, before
performing the sort.

Also, eliminate the Sources temporary std::vector, since it
essentially duplicates the sorted result as it is being
built.

This also changes the direction of the topological sort
from bottom-up to top-down. The AllNodes list starts out in
roughly top-down order, so this reduces the amount of
reordering needed. Top-down is also more convenient for
Legalize, and ISel needed only minor adjustments.

llvm-svn: 56867
2008-09-30 18:30:35 +00:00
Evan Cheng 9156bd2f48 Re-apply 56835 along with header file changes.
llvm-svn: 56848
2008-09-30 15:44:16 +00:00
Duncan Sands 2b9adce1d0 Revert commit 56835 since it breaks the build.
"If a re-materializable instruction has a register
operand, the spiller will change the register operand's
spill weight to HUGE_VAL to avoid it being spilled.
However, if the operand is already in the queue ready
to be spilled, avoid re-materializing it".

llvm-svn: 56837
2008-09-30 10:00:30 +00:00
Evan Cheng 9469049f7d If a re-materializable instruction has a register operand, the spiller will change the register operand's spill weight to HUGE_VAL to avoid it being spilled. However, if the operand is already in the queue ready to be spilled, avoid re-materializing it.
llvm-svn: 56835
2008-09-30 06:36:58 +00:00
Dale Johannesen f61a84ec43 Remove misuse of ReplaceNodeResults for atomics with
valid types.  No functional change.

llvm-svn: 56808
2008-09-29 22:25:26 +00:00
Dan Gohman 4aa9095398 Fix FastISel to not initialize the PIC-base register multiple times
in functions with PIC references from more than one basic block.

llvm-svn: 56807
2008-09-29 21:55:50 +00:00
Bill Wendling c966a737c5 Temporarily reverting r56683. This is causing a failure during the build of llvm-gcc:
/Volumes/Gir/devel/llvm/clean/llvm-gcc.obj/./gcc/xgcc -B/Volumes/Gir/devel/llvm/clean/llvm-gcc.obj/./gcc/ -B/Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/bin/ -B/Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/lib/ -isystem /Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/include -isystem /Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/sys-include -mmacosx-version-min=10.4 -O2  -O2 -g -O2  -DIN_GCC    -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -I. -I. -I../../llvm-gcc.src/gcc -I../../llvm-gcc.src/gcc/. -I../../llvm-gcc.src/gcc/../include -I./../intl -I../../llvm-gcc.src/gcc/../libcpp/include  -I../../llvm-gcc.src/gcc/../libdecnumber -I../libdecnumber -I/Volumes/Gir/devel/llvm/clean/llvm.obj/include -I/Volumes/Gir/devel/llvm/clean/llvm.src/include -fexceptions -fvisibility=hidden -DHIDE_EXPORTS -c ../../llvm-gcc.src/gcc/unwind-dw2-fde-darwin.c -o libgcc/./unwind-dw2-fde-darwin.o
Assertion failed: (TargetRegisterInfo::isVirtualRegister(regA) && TargetRegisterInfo::isVirtualRegister(regB) && "cannot update physical register live information"), function runOnMachineFunction, file /Volumes/Gir/devel/llvm/clean/llvm.src/lib/CodeGen/TwoAddressInstructionPass.cpp, line 311.
../../llvm-gcc.src/gcc/unwind-dw2.c:1527: internal compiler error: Abort trap
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://developer.apple.com/bugreporter> for instructions.
{standard input}:3521:non-relocatable subtraction expression, "_dwarf_reg_size_table" minus "L20$pb"
{standard input}:3521:symbol: "_dwarf_reg_size_table" can't be undefined in a subtraction expression
{standard input}:3520:non-relocatable subtraction expression, "_dwarf_reg_size_table" minus "L20$pb"
...

llvm-svn: 56703
2008-09-26 22:10:44 +00:00
Dan Gohman 6e0548336a Rename ConstantSDNode's getSignExtended to getSExtValue, for
consistancy with ConstantInt, and re-implement it in terms
of ConstantInt's getSExtValue.

llvm-svn: 56700
2008-09-26 21:54:37 +00:00
Evan Cheng d77cbe8947 Fix @llvm.frameaddress codegen. FP elimination optimization should be disabled when frame address is desired. Also add support for depth > 0.
llvm-svn: 56683
2008-09-26 19:48:35 +00:00
Dale Johannesen 0e32a2c935 Add "inreg" field to CallSDNode (doesn't increase
its size).  Adjust various lowering functions to
pass this info through from CallInst.  Use it to
implement sseregparm returns on X86.  Remove
X86_ssecall calling convention.

llvm-svn: 56677
2008-09-26 19:31:26 +00:00
Owen Anderson a381313d98 We don't need to insert copies for implicit_def's.
llvm-svn: 56674
2008-09-26 18:50:46 +00:00
Bill Wendling 374d7f2b16 If we have a function with an unreachable statement such that the ending debug
information is in an unreachable block, then it's possible that the high/low pc
values won't be set for the dwarf information. E.g., this function:

void abort(void) __attribute__((__noreturn__));
void dead_beef(void) __attribute__ ((noreturn));

int *b;

void dead_beef(void) {
  *b=0xdeadbeef;
  abort();
}

has a call to "@llvm.dbg.region.end" only in the unreachable block:

define void @dead_beef() noreturn nounwind  {
entry:
	call void @llvm.dbg.func.start(...)
	call void @llvm.dbg.stoppoint(...)
...
	call void @abort( ) noreturn nounwind 
	unreachable

return:		; No predecessors!
	call void @llvm.dbg.stoppoint(...)
	call void @llvm.dbg.region.end(...)
	ret void
}

The dwarf information emitted is something like:

0x00000084:     TAG_subprogram [5]  
                 AT_name( "dead_beef" )
                 AT_external( 0x01 )
                 AT_prototyped( 0x01 )
                 AT_decl_file( 0x01 )
                 AT_decl_line( 0x08 )

Note that this is *not* the best fix for this problem, but a band-aid for an
gaping wound. This code needs to be changed when we revamp our debugging
information.

llvm-svn: 56628
2008-09-26 00:28:12 +00:00
Devang Patel 4c758ea3e0 Large mechanical patch.
s/ParamAttr/Attribute/g
s/PAList/AttrList/g
s/FnAttributeWithIndex/AttributeWithIndex/g
s/FnAttr/Attribute/g

This sets the stage 
- to implement function notes as function attributes and 
- to distinguish between function attributes and return value attributes.

This requires corresponding changes in llvm-gcc and clang.

llvm-svn: 56622
2008-09-25 21:00:45 +00:00
Dale Johannesen c50ada2f56 Accept 'inreg' attribute on x86 functions as
meaning sse_regparm (i.e. float/double values go
in XMM0 instead of ST0).  Update documentation
to reflect reality.

llvm-svn: 56619
2008-09-25 20:47:45 +00:00
Dan Gohman 5e490a7567 Support for i1 XOR in FastISel. It is actually safe because
i1 operands are assumed to already by zero-extended.

llvm-svn: 56615
2008-09-25 17:22:52 +00:00
Dan Gohman 6975c36c43 Don't print fast-isel debug messages by default. Thanks Chris!
llvm-svn: 56614
2008-09-25 17:21:42 +00:00
Dan Gohman dd920bf3f0 Don't forget the newline in debug output.
llvm-svn: 56613
2008-09-25 17:17:27 +00:00
Dan Gohman 32a733e2c7 FastISel support for debug info.
llvm-svn: 56610
2008-09-25 17:05:24 +00:00
Richard Pennington 4b35e64504 bug 2812: Segmentation fault on a big emdiam processor.
llvm-svn: 56609
2008-09-25 16:15:10 +00:00
Dan Gohman 3663f156f7 Fix a recent fast-isel coverage regression - don't bail out before
giving the target a chance to materialize constants.

llvm-svn: 56605
2008-09-25 01:28:51 +00:00
Dan Gohman b8e69f1755 Enable DeadMachineInstructionElim when Fast-ISel is enabled.
llvm-svn: 56604
2008-09-25 01:14:49 +00:00
Dan Gohman b873aa632c Add debug output to this pass.
llvm-svn: 56602
2008-09-25 01:06:50 +00:00
Dan Gohman acb0554842 Refactor the code that adds standard LLVM codegen passes into
a separate function, eliminating duplication between the
add-passes-for-file and add-passes-for-machine-code code.

llvm-svn: 56599
2008-09-25 00:37:07 +00:00
Evan Cheng 2e7450716a <rdar://problem/6234798> Assertion failed: (!OpInfo.AssignedRegs.Regs.empty() && "Couldn't allocate input reg!")
llvm-svn: 56597
2008-09-25 00:14:04 +00:00
Dan Gohman 382e2ec6b7 Give LowerSubregs.cpp a top-level description.
llvm-svn: 56596
2008-09-24 23:44:12 +00:00
Dale Johannesen 86d421df23 Remove SelectionDag early allocation of registers
for earlyclobbers.  Teach Local RA about earlyclobber,
and add some tests for it.

llvm-svn: 56592
2008-09-24 23:13:09 +00:00
Anton Korobeynikov fd7faecfc2 Use helper
llvm-svn: 56584
2008-09-24 22:21:04 +00:00
Anton Korobeynikov d19e91e5a8 SmallPtrSet will be better
llvm-svn: 56583
2008-09-24 22:20:46 +00:00
Anton Korobeynikov 123afb88c4 Use generic section-handling stuff to emit constant pool entries
llvm-svn: 56579
2008-09-24 22:17:59 +00:00
Anton Korobeynikov 7497762606 Get rid of duplicate char*/Section* DataSection
llvm-svn: 56575
2008-09-24 22:16:16 +00:00
Anton Korobeynikov f8dc8aac3c Get rid of duplicate char*/Section* TextSection
llvm-svn: 56574
2008-09-24 22:15:21 +00:00
Anton Korobeynikov 076e905b94 Move actual section printing stuff to AsmPrinter from TAI reducing heap traffic.
llvm-svn: 56573
2008-09-24 22:14:23 +00:00
Anton Korobeynikov 69ff51baa0 Drop obsolete hook and change all usage to new interface
llvm-svn: 56572
2008-09-24 22:13:07 +00:00
Anton Korobeynikov 7d002fa77b Provide direct function to switch to Section
llvm-svn: 56571
2008-09-24 22:12:10 +00:00
Owen Anderson 4ef4b1a7c1 Fix off-by-one error when updating live intervals.
llvm-svn: 56567
2008-09-24 21:30:38 +00:00
Bill Wendling dea91308ae Reapplying r56550
llvm-svn: 56553
2008-09-24 10:25:02 +00:00
Bill Wendling 162c26dee3 Forgot this part with my last patch. Sorry about the breakage.
llvm-svn: 56552
2008-09-24 10:16:24 +00:00
Eric Christopher 4e26a81371 Temporarily revert r56550 until missing commit can be added.
llvm-svn: 56551
2008-09-24 08:30:44 +00:00
Bill Wendling 7c31464a0b Refactor the constant folding code into it's own function. And call it from both
the SelectionDAG and DAGCombiner code. The only functionality change is that now
the DAG combiner is performing the constant folding for these operations instead
of being a no-op.

This is *not* in response to a bug, so there isn't a testcase.

llvm-svn: 56550
2008-09-24 07:11:26 +00:00
Dale Johannesen c36660d756 Next round of earlyclobber handling. Approach the
RA problem by expanding the live interval of an
earlyclobber def back one slot.  Remove
overlap-earlyclobber throughout.  Remove 
earlyclobber bits and their handling from
live internals.

llvm-svn: 56539
2008-09-24 01:07:17 +00:00
Dan Gohman 6b33aa4d96 Refactor the logic for testing if an instruction is dead into a
separate method.

llvm-svn: 56531
2008-09-24 00:27:38 +00:00
Dan Gohman 1e2b282be3 Set SetStore to false, to allow this pass to delete
dead loads.

llvm-svn: 56529
2008-09-24 00:07:08 +00:00
Dan Gohman 7c59ed6ff8 Add a method to MachineInstr for testing whether it makes
any volatile memory references.

llvm-svn: 56528
2008-09-24 00:06:15 +00:00
Evan Cheng e0add20c1b Properly handle 'm' inline asm constraints. If a GV is being selected for the addressing mode, it requires the same logic for PIC relative addressing, etc.
llvm-svn: 56526
2008-09-24 00:05:32 +00:00
Devang Patel ba3fa6c6e1 s/ParameterAttributes/Attributes/g
llvm-svn: 56513
2008-09-23 23:03:40 +00:00
Dan Gohman 676145f02d Now that DeadMachineInstructionElim is basically working
correctly, it's not necessary to explicitly remove registers
from their use-def lists.

llvm-svn: 56509
2008-09-23 22:04:18 +00:00
Dan Gohman 918fe08a56 Arrange for FastISel code to have access to the MachineModuleInfo
object. This will be needed to support debug info.

llvm-svn: 56508
2008-09-23 21:53:34 +00:00
Dan Gohman 269999cb03 Track local physical register liveness. This is not the most
efficient implementation possible, but it's pretty simple and
good enough for the time being.

llvm-svn: 56504
2008-09-23 21:40:44 +00:00
Dan Gohman c07f686665 Replace the LiveRegs SmallSet with a simple counter that keeps
track of the number of live registers, which is all the set was
being used for.

llvm-svn: 56498
2008-09-23 18:50:48 +00:00
Owen Anderson 4cdc18ad80 Add initial support for inserting last minute copies.
llvm-svn: 56485
2008-09-23 04:37:10 +00:00
Dan Gohman e2947e1e07 Fix the alignment of loads from constant pool entries when the
load address has an offset from the base of the constant pool
entry.

llvm-svn: 56479
2008-09-22 22:40:08 +00:00
Evan Cheng bab5988017 Livestacks really does preserve everything.
llvm-svn: 56476
2008-09-22 22:26:15 +00:00
Evan Cheng 962c2cf17a Instead of setPreservesAll, just mark them preseving machine loop info and machine dominators.
llvm-svn: 56475
2008-09-22 22:21:38 +00:00
Owen Anderson 97364655dc Significant improvements to the logic for merging live intervals. This code can't
just use LI::MergeValueAsValue, as its behavior in the presence of overlapping ranges
isn't what StrongPHIElimination wants.

llvm-svn: 56472
2008-09-22 21:58:58 +00:00
Dale Johannesen 7a74e71489 Make log, log2, log10, exp, exp2 use Expand by
default.

llvm-svn: 56471
2008-09-22 21:57:32 +00:00
Evan Cheng 168f8f3916 Mark several codegen passes as preserving all analysis.
llvm-svn: 56469
2008-09-22 20:58:04 +00:00
Dale Johannesen f1acc4d610 More refactoring. Yawn.
llvm-svn: 56468
2008-09-22 20:51:30 +00:00
Dale Johannesen 7beddb8680 Refactor FP intrinisic setup. Per review feedback.
llvm-svn: 56456
2008-09-22 19:51:58 +00:00
Evan Cheng 13beeeb128 Per review feedback: Only perform
(srl x, (trunc (and y, c))) -> (srl x, (and (trunc y), c))
etc. when both "trunc" and "and" have single uses.

llvm-svn: 56452
2008-09-22 18:19:24 +00:00
Oscar Fuentes a229b3c9a7 Initial support for the CMake build system.
llvm-svn: 56419
2008-09-22 01:08:49 +00:00
Bill Wendling 91ef8fcd29 Add helper function to get a 32-bit floating point constant. No functionality change.
llvm-svn: 56418
2008-09-22 00:44:35 +00:00
Dan Gohman ae9d9f4d3f Factor out code into HandleVirtRegDef, for consistency with
Handle{Virt,Phys}Reg{Def,Use}. Remove a redundant check
for register zero, and redundant checks for isPhysicalRegister.

llvm-svn: 56412
2008-09-21 21:11:41 +00:00
Owen Anderson df8f1cb995 Fetch the starting index of the block when assigning intervals. This gets live-in indices
correct in the presence of things like EH labels.

llvm-svn: 56410
2008-09-21 20:43:24 +00:00
Chris Lattner 43f5449c48 don't print GlobalAddressSDNode's with an offset of zero as "foo0".
llvm-svn: 56399
2008-09-21 18:38:31 +00:00
Dale Johannesen 9af7b3daec Teach coalescer about earlyclobber bits.
Check bits for preferred register.

llvm-svn: 56384
2008-09-20 02:03:04 +00:00
Evan Cheng c042000649 Fix PR2808. When regalloc runs out of register, it spill a physical register around the live interval being allocated. Do not continue to try to spill another register, just grab the physical register and move on.
llvm-svn: 56381
2008-09-20 01:28:05 +00:00
Evan Cheng 29e4c9192d Continue after removing the current MI.
llvm-svn: 56372
2008-09-19 22:49:39 +00:00
Dan Gohman 9801ba451a Refactor X86SelectConstAddr, folding it into X86SelectAddress. This
results in better code for globals. Also, unbreak the local CSE for
GlobalValue stub loads.

llvm-svn: 56371
2008-09-19 22:16:54 +00:00
Dale Johannesen 436aae627d Make earlyclobber stuff work when virtual regs
have previously been assigned conflicting physreg.

llvm-svn: 56364
2008-09-19 18:52:31 +00:00
Evan Cheng 4c0197043c Re-materalized definition instructions may be dead. Whack them.
llvm-svn: 56352
2008-09-19 17:38:47 +00:00
Dale Johannesen e519bd4183 Remove AsmThatEarlyClobber etc. from LiveIntervalAnalysis
and redo as linked list walk.  Logic moved into RA.
Per review feedback.

llvm-svn: 56326
2008-09-19 01:02:35 +00:00
Evan Cheng 3d9416cf24 Somehow RegAllocLinearScan is keeping two pointers to MachineRegisterInfo.
llvm-svn: 56314
2008-09-18 22:38:47 +00:00
Dan Gohman f3d647e00b Don't consider instructions with implicit physical register
defs to be necessarily live.

llvm-svn: 56310
2008-09-18 18:22:32 +00:00
Dan Gohman 95be7d7b85 Add a new "fast" scheduler. This is currently basically just a
copy of the BURRList scheduler, but with several parts ripped
out, such as backtracking, online topological sort maintenance
(needed by backtracking), the priority queue, and Sethi-Ullman
number computation and maintenance (needed by the priority
queue). As a result of all this, it generates somewhat lower
quality code, but that's its tradeoff for running about 30%
faster than list-burr in -fast mode in many cases.

This is somewhat experimental. Moving forward, major pieces of
this can be refactored with pieces in common with
ScheduleDAGRRList.cpp.

llvm-svn: 56307
2008-09-18 16:26:26 +00:00
Dale Johannesen f8610ebebc Add a bit to mark operands of asm's that conflict
with an earlyclobber operand elsewhere.  Propagate
this bit and the earlyclobber bit through SDISel.
Change linear-scan RA not to allocate regs in a way 
that conflicts with an earlyclobber.  See also comments.

llvm-svn: 56290
2008-09-17 21:13:11 +00:00
Evan Cheng f3fcd7a464 Unallocatable registers do not have live intervals.
llvm-svn: 56287
2008-09-17 18:36:25 +00:00
Dan Gohman 6ab52a8018 Don't worry about clobbering physical register defs that aren't used.
llvm-svn: 56281
2008-09-17 15:25:49 +00:00
Dan Gohman c24cd015a7 Add a new MachineInstr-level DCE pass. It is very simple, and is intended to
be used with fast-isel.

llvm-svn: 56268
2008-09-17 00:43:24 +00:00
Evan Cheng a904f466e8 When converting a CopyFromReg to a copy instruction, use the register class of its uses to determine the right destination register class of the copy. This is important for targets where a physical register may belong to multiple register classes.
llvm-svn: 56258
2008-09-16 23:12:11 +00:00
Dan Gohman 64d6c6fe30 Change SelectionDAG::getConstantPool to always set the alignment of the
ConstantPoolSDNode, using the target's preferred alignment for the
constant type.

In LegalizeDAG, when performing loads from the constant pool, the
ConstantPoolSDNode's alignment is used in the calls to getLoad and
getExtLoad.

This change prevents SelectionDAG::getLoad/getExtLoad from incorrectly
choosing the ABI alignment for constant pool loads when Alignment == 0.
The incorrect alignment is only a performance issue when ABI alignment
does not equal preferred alignment (i.e., on x86 it was generating
MOVUPS instead of MOVAPS for v4f32 constant loads when the default ABI
alignment for 128bit vectors is forced to 1 byte.)

Patch by Paul Redmond!

llvm-svn: 56253
2008-09-16 22:05:41 +00:00
Bill Wendling 24c79f28b1 Reverting r56249. On further investigation, this functionality isn't needed.
Apologies for the thrashing.

llvm-svn: 56251
2008-09-16 21:48:12 +00:00
Dan Gohman ab26f20d44 Include the alignment value when displaying ConstantPoolSDNodes.
llvm-svn: 56250
2008-09-16 21:18:22 +00:00
Bill Wendling 8bc392fb1d - Change "ExternalSymbolSDNode" to "SymbolSDNode".
- Add linkage to SymbolSDNode (default to external).
- Change ISD::ExternalSymbol to ISD::Symbol.
- Change ISD::TargetExternalSymbol to ISD::TargetSymbol

These changes pave the way to allowing SymbolSDNodes with non-external linkage.

llvm-svn: 56249
2008-09-16 21:12:30 +00:00
Dan Gohman 5cf6120a7c Fix these comments to reflect current reality. Surprisingly,
MachineConstantPool::getConstantPoolIndex actually expects
a log2-encoded alignment.

llvm-svn: 56248
2008-09-16 20:45:53 +00:00
Dan Gohman 050d7835c6 Don't take the time to CheckDAGForTailCallsAndFixThem when tail calls
are not enabled. Instead just omit the tail call flag when calls are
created.

llvm-svn: 56235
2008-09-16 01:42:28 +00:00