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

that of INSERT_SUBREG and SUBREG_TO_REG.

llvm-svn: 61218

llvm-svn: 61217

llvm-svn: 61216

llvm-svn: 61213

llvm-svn: 61209

llvm-svn: 61184

folding's tail merging doesn't currently preserve liveness information
which post-RA scheduling requires.

llvm-svn: 61183

llvm-svn: 61182

llvm-svn: 61159

llvm-svn: 61158

llvm-svn: 61129

temporary workaround for an obscure bug. When node cloning is
used, it is possible that more SUnits will be created, and
if the SUnits std::vector has to reallocate, it will
invalidate all the graph edges.

llvm-svn: 61122