llvm-svn: 61613

llvm-svn: 61612

instructions to avoid copies, because TwoAddressInstructionPass
also does this optimization.  The scheduler's version didn't
account for live-out values, which resulted in spurious commutes
and missed opportunities.

Now, TwoAddressInstructionPass handles all the opportunities,
instead of just those that the scheduler missed. The result is
usually the same, though there are occasional trivial differences
resulting from the avoidance of spurious commutes.

llvm-svn: 61611

and BRCOND conditions.  Reorder a few methods while
there.

llvm-svn: 61547

llvm-svn: 61545

promote from i1 all the way up to the canonical SetCC type.
In order to discover an appropriate type to use, pass
MVT::Other to getSetCCResultType.  In order to be able to
do this, change getSetCCResultType to take a type as an
argument, not a value (this is also more logical).

llvm-svn: 61542

llvm-svn: 61514

Darwin doesn't. Make this optional for platforms.

llvm-svn: 61484

(quad) on a 64-bit platform. This fixes a problem with EH frames on Darwin.

llvm-svn: 61483

llvm-svn: 61465

llvm-svn: 61463

llvm-svn: 61460

Add prototype code for recomputing a live interval's ranges and valnos through recursive phi construction.

llvm-svn: 61458

llvm-svn: 61420

about other platforms.

llvm-svn: 61415

llvm-svn: 61405

llvm-svn: 61401

llvm-svn: 61398

llvm-svn: 61397

llvm-svn: 61396

llvm-svn: 61395

Silence unused variable warning.

llvm-svn: 61391

llvm-svn: 61390

This removes all the _8, _16, _32, and _64 opcodes and replaces each
group with an unsuffixed opcode. The MemoryVT field of the AtomicSDNode
is now used to carry the size information. In tablegen, the size-specific
opcodes are replaced by size-independent opcodes that utilize the
ability to compose them with predicates.

This shrinks the per-opcode tables and makes the code that handles
atomics much more concise.

llvm-svn: 61389

code in ScheduleDAGSDNodes' BuildSchedGraph into separate functions.

llvm-svn: 61376

several places. isTerminator() returns true for a superset
of cases, and includes things like FP_REG_KILL, which are
nither return or branch but aren't safe to move/remat/etc.

llvm-svn: 61373

llvm-svn: 61372

llvm-svn: 61371

llvm-svn: 61361

functions.

llvm-svn: 61345

up on a profile.

llvm-svn: 61344

llvm-svn: 61277

and setDepthDirty(), respectively. This fixes PR3241.

llvm-svn: 61276

warnings on compilers that warn about such things.

llvm-svn: 61263

Fix PR3149. If an early clobber def is a physical register and it is tied to an input operand, it effectively extends the live range of the physical register. Currently we do not have a good way to represent this.

172     %ECX<def> = MOV32rr %reg1039<kill>
180     INLINEASM <es:subl $5,$1
        sbbl $3,$0>, 10, %EAX<def>, 14, %ECX<earlyclobber,def>, 9, %EAX<kill>,
36, <fi#0>, 1, %reg0, 0, 9, %ECX<kill>, 36, <fi#1>, 1, %reg0, 0
188     %EAX<def> = MOV32rr %EAX<kill>
196     %ECX<def> = MOV32rr %ECX<kill>
204     %ECX<def> = MOV32rr %ECX<kill>
212     %EAX<def> = MOV32rr %EAX<kill>
220     %EAX<def> = MOV32rr %EAX
228     %reg1039<def> = MOV32rr %ECX<kill>

The early clobber operand ties ECX input to the ECX def.

The live interval of ECX is represented as this:
%reg20,inf = [46,47:1)[174,230:0)  0@174-(230) 1@46-(47)

The right way to represent this is something like
%reg20,inf = [46,47:2)[174,182:1)[181:230:0)  0@174-(182) 1@181-230 @2@46-(47)

Of course that won't work since that means overlapping live ranges defined by two val#.

The workaround for now is to add a bit to val# which says the val# is redefined by a early clobber def somewhere. This prevents the move at 228 from being optimized away by SimpleRegisterCoalescing::AdjustCopiesBackFrom.

llvm-svn: 61259

llvm-svn: 61244

The EH_frame and .eh symbols are now private, except for darwin9 and earlier.
The patch also fixes the definition of PrivateGlobalPrefix on pcc linux.

llvm-svn: 61242

llvm-svn: 61238

data from a previous block.

llvm-svn: 61237

subreg instructions.

llvm-svn: 61220