slow the compiler down at -O0 some 30% or more. Ooops.

llvm-svn: 53120

llvm-svn: 53110

- Remove calls to copyKillDeadInfo which is an N^2 function. Instead, propagate kill / dead markers as new instructions are constructed in foldMemoryOperand, convertToThressAddress, etc.
- Also remove LiveVariables::instructionChanged, etc. Replace all calls with cheaper calls which update VarInfo kill list.

llvm-svn: 53097

254.gap failure was not due to this mod.

llvm-svn: 53068

llvm-svn: 53065

llvm-svn: 53063

- Add LiveVariables::replaceKillInstruction. This does a subset of instructionChanged. That is, it only update the VarInfo.kills if the new instruction is known to have the correct dead and kill markers.
- CommuteInstruction copies kill / dead markers over to new instruction. So use replaceKillInstruction instead.

llvm-svn: 53061

Make LiveVariables even more optional, by making it optional in the call to TargetInstrInfo::convertToThreeAddressInstruction
Also, if LV isn't around, then TwoAddr doesn't need to be updating flags, since they won't have been set in the first place.

llvm-svn: 53058

SelectionDAG::SelectNodeTo in the instruction selector. This
updates existing nodes in place instead of creating new ones.

Go back to selecting ISD::DBG_LABEL nodes into
TargetInstrInfo::DBG_LABEL nodes instead of leaving them
unselected, now that SelectNodeTo allows us to update them
in place.

llvm-svn: 53057

llvm-svn: 53050

TwoAddressInstructionPass doesn't really require LiveVariables, it just needs to update it if it's already around.

llvm-svn: 53049

to be passed the list of value types, and use this
where appropriate.  Inappropriate places are where
the value type list is already known and may be
long, in which case the existing method is more
efficient.

llvm-svn: 53035

have different alignment by creating a stack slot with the max
alignment of source and target type.

llvm-svn: 53031

The dag combiner can produce a shift of i1 when folding icmp i1's.

llvm-svn: 53030

llvm-svn: 53012

This makes sure that all new nodes are expunged, not
just those the top node of a new subtree.

llvm-svn: 53011

- Code clean up.

llvm-svn: 53010

Solanki!

llvm-svn: 53008

llvm-svn: 53003

llvm-svn: 53001

debug information is being output, because it's leet!

llvm-svn: 52994

llvm-svn: 52992

much more cheaply.

llvm-svn: 52990

llvm-svn: 52988

- Don't use GlobalVariable::LinkageTypes when unsigned works.

llvm-svn: 52987

predessors of exit blocks from tail merging
consideration.

llvm-svn: 52985

llvm-svn: 52982

Add a version of AsmPrinter::EOL that takes a const char* so that we don't have to do as many implicit std::string constructions.
Unfortunately, this doesn't appear to translate to a real speedup in practice.

llvm-svn: 52981

llvm-svn: 52975

llvm-svn: 52971

llvm-svn: 52970

llvm-svn: 52944

the need for a flavor operand, and add a new SDNode subclass,
LabelSDNode, for use with them to eliminate the need for a label id
operand.

Change instruction selection to let these label nodes through
unmodified instead of creating copies of them. Teach the MachineInstr
emitter how to emit a MachineInstr directly from an ISD label node.

This avoids the need for allocating SDNodes for the label id and
flavor value, as well as SDNodes for each of the post-isel label,
label id, and label flavor.

llvm-svn: 52943

llvm-svn: 52934

llvm-svn: 52933

llvm-svn: 52931

llvm-svn: 52930

llvm-svn: 52929

SelectionDAG::allnodes_size is linear, but that doesn't appear to
outweigh the benefit of reducing heap traffic. If it does become a
problem, we should teach SelectionDAG to keep a count of how many
nodes are live, because there are several other places where that
information would be useful as well.

llvm-svn: 52926

purpose, and give it a custom SDNode subclass so that it doesn't
need to have line number, column number, filename string, and
directory string, all existing as individual SDNodes to be the
operands.

This was the only user of ISD::STRING, StringSDNode, etc., so
remove those and some associated code.

This makes stop-points considerably easier to read in
-view-legalize-dags output, and reduces overhead (creating new
nodes and copying std::strings into them) on code containing
debugging information.

llvm-svn: 52924