Break anti-dependencies using free registers in a round-robin manner to avoid introducing new anti-dependencies.

llvm-svn: 86098

Do a scheduling pass ignoring anti-dependencies to identify candidate registers that should be renamed.

llvm-svn: 85939

 - Be consistent when referring to MachineBasicBlocks: BB#0.
 - Be consistent when referring to virtual registers: %reg1024.
 - Be consistent when referring to unknown physical registers: %physreg10.
 - Be consistent when referring to known physical registers: %RAX
 - Be consistent when referring to register 0: %reg0
 - Be consistent when printing alignments: align=16
 - Print jump table contents.
 - Don't print host addresses, in general.
 - and various other cleanups.

llvm-svn: 85682

llvm-svn: 85412

Allow the aggressive anti-dep breaker to process the same region multiple times. This is necessary because new anti-dependencies are exposed when "current" ones are broken.

llvm-svn: 85166

llvm-svn: 85146

Add aggressive anti-dependence breaker. Currently it is not the default for any target. Enable with -break-anti-dependencies=all.

llvm-svn: 85145

llvm-svn: 85127

VISIBILITY_HIDDEN removal.

llvm-svn: 85043

Chris claims we should never have visibility_hidden inside any .cpp file but
that's still not true even after this commit.

llvm-svn: 85042

Allow the target to select the level of anti-dependence breaking that should be performed by the post-RA scheduler. The default is none.

llvm-svn: 84911

llvm-svn: 84727

Respect src register allocation requirements when breaking anti-dependencies. Remove some dead code.

llvm-svn: 84691

llvm-svn: 84658

llvm-svn: 84273

llvm-svn: 84248

llvm-svn: 84011

llvm-svn: 83695

is trivially rematerializable and integrate it into
TargetInstrInfo::isTriviallyReMaterializable. This way, all places that
need to know whether an instruction is rematerializable will get the
same answer.

This enables the useful parts of the aggressive-remat option by
default -- using AliasAnalysis to determine whether a memory location
is invariant, and removes the questionable parts -- rematting operations
with virtual register inputs that may not be live everywhere.

llvm-svn: 83687

MI->addOperand invalidates references to it's operands, avoid touching
the operand after a new one was added.

llvm-svn: 83249

llvm-svn: 83223

Remove neonfp attribute and instead set default based on CPU string. Add -arm-use-neon-fp to override the default.

llvm-svn: 83218

Restore the -post-RA-scheduler flag as an override for the target specification. Remove -mattr for setting PostRAScheduler enable and instead use CPU string.

llvm-svn: 83215

Use MachineFrameInfo.getPristineRegs() to determine which callee-saved registers are available for anti-dependency breaking. Some cleanup.

llvm-svn: 83208

operands of instructions with these properties while breaking anti-dep.

llvm-svn: 83198

basic blocks that are so long that their size overflows a short.

Also assert that overflow does not happen in the future, as requested by Evan.

This fixes PR4401.

llvm-svn: 83159

Remove -post-RA-schedule flag and add a TargetSubtarget method to enable post-register-allocation scheduling. By default it is off. For ARM, enable/disable with -mattr=+/-postrasched. Enable by default for cortex-a8.

llvm-svn: 83122

llvm-svn: 83007

Fix bug in kill flag updating for post-register-allocation scheduling. When the kill flag of a superreg needs to be cleared because there are one or more subregs live, we instead add implicit-defs of those subregs and leave the kill flag on the superreg. This allows us to end the live-range of the superreg without ending the live-ranges of the subregs.

llvm-svn: 82629

Enhance EmitInstrWithCustomInserter() so target can specify CFG changes that sdisel will use to properly complete phi nodes.
Not functionality change yet.

llvm-svn: 82273

llvm-svn: 81112

Create our own block initializer for kill fixups as the scheduling one wasn't doing the right thing.

llvm-svn: 80958

llvm-svn: 80702

llvm-svn: 80621

llvm-svn: 80410

llvm-svn: 80002

llvm-svn: 79836

llvm-svn: 78843

llvm-svn: 78773

in breaking an anti-dependence into a separate function.

llvm-svn: 78767