reallocations. We don't do cloning on MachineInstr schedule DAGs,
but this is a worthwhile sanity check regardless.

llvm-svn: 61343

llvm-svn: 61342

comment for the ScheduleDAGSDNodes class.

llvm-svn: 61341

llvm-svn: 61338

llvm-svn: 61307

llvm-svn: 61297

constant shift count that doesn't fit in the shift instruction's
immediate field. This fixes PR3242.

llvm-svn: 61281

llvm-svn: 61280

our optz'n will apply to it, then build the replacement vector only if needed.

llvm-svn: 61279

can be static member functions.

llvm-svn: 61278

llvm-svn: 61277

and setDepthDirty(), respectively. This fixes PR3241.

llvm-svn: 61276

llvm-svn: 61265

llvm-svn: 61264

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

version number assertions.

llvm-svn: 61257

llvm-svn: 61254

llvm-svn: 61253

This operation can be used to build dyn_cast, isa, and cast.

llvm-svn: 61252

Patch by Lukasz Janyst!

llvm-svn: 61251

that have i32 immediates so that they get selected first. This
currently only matters in the JIT, as assemblers will
automatically use the smallest encoding.

llvm-svn: 61250

reduces the amount of code slightly when assertions are enabled.

llvm-svn: 61249

- CodeGenPrepare does not split loop back edges but it only knows about back edges of single block loops. It now does a DFS walk to find loop back edges.
- Use SplitBlockPredecessors to factor out common predecessors of the critical edge destination. This is disabled for now due to some regressions.

llvm-svn: 61248

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: 61241

llvm-svn: 61240

The problematic part of this patch is that we were out of attribute bits,
requiring some fancy bit hacking to make it fit (by shrinking alignment)
without breaking existing users or the file format.

This change will require users to rebuild llvm-gcc to match llvm.

llvm-svn: 61239

llvm-svn: 61238

data from a previous block.

llvm-svn: 61237

one instruction.

llvm-svn: 61236

argument. Nothing was using it, and it set the MBB member without
calling enterBasicBlock, which was problematic.

llvm-svn: 61234

of incorrectly generating pmuldq

llvm-svn: 61228

llvm-svn: 61222

subreg instructions.

llvm-svn: 61220

llvm-svn: 61219

that of INSERT_SUBREG and SUBREG_TO_REG.

llvm-svn: 61218

llvm-svn: 61217

llvm-svn: 61216