be very explicit that readnone/readonly functions can't
throw exceptions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70788 91177308-0d34-0410-b5e6-96231b3b80d8

In some rare cases, the register allocator can spill registers but end up not utilizing registers at all. The fundamental problem is linearscan's backtracking can end up freeing more than one allocated registers. However,  reloads and restores might be folded into uses / defs and freed registers might not be used at all.

VirtRegMap keeps track of allocations so it knows what's not used. As a horrible hack, the stack coloring can color spill slots with *free* registers. That is, it replace reload and spills with copies from and to the free register. It unfold instructions that load and store the spill slot and replace them with register using variants.

Not yet enabled. This is part 1. More coming.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70787 91177308-0d34-0410-b5e6-96231b3b80d8

Handle implicit zext in a better way. Shamelessly stolen from x86 backend.
Thanks for Dan Gohman for suggestion!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70782 91177308-0d34-0410-b5e6-96231b3b80d8

Regenerate

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70772 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70770 91177308-0d34-0410-b5e6-96231b3b80d8

Update due to mainline API change

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70769 91177308-0d34-0410-b5e6-96231b3b80d8

Add TODO list :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70768 91177308-0d34-0410-b5e6-96231b3b80d8

Make handling of conditional stuff much more straightforward

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70767 91177308-0d34-0410-b5e6-96231b3b80d8

Temporary disable imm patterns for cmp. Actually, all cmp-related stuff (select_cc, setcc, br_cc). needs to be rethought

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70766 91177308-0d34-0410-b5e6-96231b3b80d8

Expand divisions into libcalls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70765 91177308-0d34-0410-b5e6-96231b3b80d8

Properly handle sdiv / udiv / srem / urem libcalls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70764 91177308-0d34-0410-b5e6-96231b3b80d8

Custom lower SIGN_EXTEND

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70763 91177308-0d34-0410-b5e6-96231b3b80d8

Some eye-candy

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70762 91177308-0d34-0410-b5e6-96231b3b80d8

Print function header / footer

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70761 91177308-0d34-0410-b5e6-96231b3b80d8

Fix printing: je => jeq

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70760 91177308-0d34-0410-b5e6-96231b3b80d8

Add 8bit shifts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70759 91177308-0d34-0410-b5e6-96231b3b80d8

Handle logical shift right (at least I hope so :) )

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70758 91177308-0d34-0410-b5e6-96231b3b80d8

Handle anyext

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70757 91177308-0d34-0410-b5e6-96231b3b80d8

Expand all sorts of indirect branches

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70755 91177308-0d34-0410-b5e6-96231b3b80d8

Add InsertBranch() hook for tail mergeing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70754 91177308-0d34-0410-b5e6-96231b3b80d8

Implement bswap

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70753 91177308-0d34-0410-b5e6-96231b3b80d8

Properly handle ExternalSymbol's

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70752 91177308-0d34-0410-b5e6-96231b3b80d8

Expand muls (all mulls!) to libcalls for now

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70751 91177308-0d34-0410-b5e6-96231b3b80d8

Proper name 16 bit libcalls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70750 91177308-0d34-0410-b5e6-96231b3b80d8

Add libcall expansion for 16 and 128 bit muls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70749 91177308-0d34-0410-b5e6-96231b3b80d8

Provide addc and subc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70748 91177308-0d34-0410-b5e6-96231b3b80d8

Add left shift

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70747 91177308-0d34-0410-b5e6-96231b3b80d8

Add direct branch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70746 91177308-0d34-0410-b5e6-96231b3b80d8

It's error-prone to maintain two separate variants of asmprinting stuff, one of which is even used. Drop second (aka 'intel') variant of operands. It can be added later, if needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70745 91177308-0d34-0410-b5e6-96231b3b80d8

Lower select with custom inserted and make condjumps generic

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70744 91177308-0d34-0410-b5e6-96231b3b80d8

Add first draft for conditions, conditional branches, etc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70743 91177308-0d34-0410-b5e6-96231b3b80d8

Hanle i8 returns

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70742 91177308-0d34-0410-b5e6-96231b3b80d8

Small tweaking

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70741 91177308-0d34-0410-b5e6-96231b3b80d8

Add prologue/epilogue emission. Fix frame pointer handling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70740 91177308-0d34-0410-b5e6-96231b3b80d8

Add code for save/restore of callee-saved registers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70739 91177308-0d34-0410-b5e6-96231b3b80d8

Two more hooks for RA and FP registers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70738 91177308-0d34-0410-b5e6-96231b3b80d8

Proper handle loading of effective address of stack slot stuff

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70737 91177308-0d34-0410-b5e6-96231b3b80d8

Match frame indexes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70736 91177308-0d34-0410-b5e6-96231b3b80d8

First draft of stack slot loads / stores lowering

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70735 91177308-0d34-0410-b5e6-96231b3b80d8

Reverse order of memory arguments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70734 91177308-0d34-0410-b5e6-96231b3b80d8

Remove bogus pattern

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70733 91177308-0d34-0410-b5e6-96231b3b80d8

Correct asmprinting of memory operands

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70732 91177308-0d34-0410-b5e6-96231b3b80d8

Match wrapper node for address

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70731 91177308-0d34-0410-b5e6-96231b3b80d8

Add lowering for global address nodes. Not pretty efficient though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70730 91177308-0d34-0410-b5e6-96231b3b80d8

Some early full call lowering draft for direct calls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70729 91177308-0d34-0410-b5e6-96231b3b80d8

Add call frame setup instruction elimination and lowerid for bunch of call-related stuff.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70728 91177308-0d34-0410-b5e6-96231b3b80d8

Add CALL lowering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70727 91177308-0d34-0410-b5e6-96231b3b80d8

Add bunch of mem-whatever patterns

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70726 91177308-0d34-0410-b5e6-96231b3b80d8

Add bunch of reg-mem inst patterns

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70725 91177308-0d34-0410-b5e6-96231b3b80d8

Add normal and trunc stores

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70724 91177308-0d34-0410-b5e6-96231b3b80d8

Basic support for mem=>reg moves

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70723 91177308-0d34-0410-b5e6-96231b3b80d8

Add 8-bit insts. zext behaviour is not modelled yet

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70722 91177308-0d34-0410-b5e6-96231b3b80d8

Add 8-bit regclass and pattern for sext_inreg

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70721 91177308-0d34-0410-b5e6-96231b3b80d8

Add pattern for OR

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70720 91177308-0d34-0410-b5e6-96231b3b80d8

Add reg-imm variants

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70719 91177308-0d34-0410-b5e6-96231b3b80d8

Add hint to nop

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70718 91177308-0d34-0410-b5e6-96231b3b80d8

Add more instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70717 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70716 91177308-0d34-0410-b5e6-96231b3b80d8

Add dummy lowering for shifts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70715 91177308-0d34-0410-b5e6-96231b3b80d8

We don't have any div at all - thus mark it as expensive

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70714 91177308-0d34-0410-b5e6-96231b3b80d8

We're not going to spend 100% of time in interrupts, do we? :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70713 91177308-0d34-0410-b5e6-96231b3b80d8

Add simple reg-reg add.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70712 91177308-0d34-0410-b5e6-96231b3b80d8

gas uses lower letter for register names

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70711 91177308-0d34-0410-b5e6-96231b3b80d8

Add code enough for emission of reg-reg and reg-imm moves. This allows us to compile "ret i16 0" properly!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70710 91177308-0d34-0410-b5e6-96231b3b80d8

Add function body printing routine

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70709 91177308-0d34-0410-b5e6-96231b3b80d8

Add 'msp430' target triple recognizer

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70708 91177308-0d34-0410-b5e6-96231b3b80d8

Make emit{Prologue,Epilogue}() noop for now

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70707 91177308-0d34-0410-b5e6-96231b3b80d8

Add callee-saved regs & reg classes getter hooks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70706 91177308-0d34-0410-b5e6-96231b3b80d8

Add simple FP indicator for given function hook

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70705 91177308-0d34-0410-b5e6-96231b3b80d8

Provide set of reserved registers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70704 91177308-0d34-0410-b5e6-96231b3b80d8

Add proper ISD::RET lowering

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70703 91177308-0d34-0410-b5e6-96231b3b80d8

Add first draft of MSP430 calling convention stuff and draft of ISD::FORMAL_ARGUMENTS node lowering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70702 91177308-0d34-0410-b5e6-96231b3b80d8

Fix register names, fix register allocation order, handle frame pointer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70701 91177308-0d34-0410-b5e6-96231b3b80d8

Clearify the usage and add some debug stuff

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70700 91177308-0d34-0410-b5e6-96231b3b80d8

Cleanup

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70699 91177308-0d34-0410-b5e6-96231b3b80d8

Add cmake script. No idea whether it works or not :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70698 91177308-0d34-0410-b5e6-96231b3b80d8

Add a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70697 91177308-0d34-0410-b5e6-96231b3b80d8

Typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70695 91177308-0d34-0410-b5e6-96231b3b80d8

Dummy MSP430 backend

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70694 91177308-0d34-0410-b5e6-96231b3b80d8

-Move the DwarfWriter::ValidDebugInfo check to a static DIDescriptor::ValidDebugInfo
-Create DebugLocs without the need to have a DwarfWriter around

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70682 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r70645 for now; it's causing a variety of regressions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70661 91177308-0d34-0410-b5e6-96231b3b80d8

Revert r70630. Go back to appending ".b" to internal globals when shrinking
them to bool.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70653 91177308-0d34-0410-b5e6-96231b3b80d8

Add an svn:ignore for unittests/VMCore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70646 91177308-0d34-0410-b5e6-96231b3b80d8

Convert ScalarEvolution to use CallbackVH for its internal map. This
makes ScalarEvolution::deleteValueFromRecords, and it's code that
subtly needed to be called before ReplaceAllUsesWith, unnecessary.

It also makes ValueDeletionListener unnecessary.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70645 91177308-0d34-0410-b5e6-96231b3b80d8

Apply Jeffrey Yasskin's CallbackVH patch, with minor tweaks from me
to make the copy constructor and destructor protected, and corresponding
adjustments to the unittests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70644 91177308-0d34-0410-b5e6-96231b3b80d8

Include <limits.h> to get the definition of CHAR_BIT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70643 91177308-0d34-0410-b5e6-96231b3b80d8

The second argument to RecursivelyDeleteTriviallyDeadInstructions has
a default value, and will hopefully be going away soon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70642 91177308-0d34-0410-b5e6-96231b3b80d8

Previously, RecursivelyDeleteDeadInstructions provided an option
of returning a list of pointers to Values that are deleted. This was
unsafe, because the pointers in the list are, by nature of what
RecursivelyDeleteDeadInstructions does, always dangling. Replace this
with a simple callback mechanism. This may eventually be removed if
all clients can reasonably be expected to use CallbackVH.

Use this to factor out the dead-phi-cycle-elimination code from LSR
utility function, and generalize it to use the
RecursivelyDeleteTriviallyDeadInstructions utility function.

This makes LSR more aggressive about eliminating dead PHI cycles;
adjust tests to either be less trivial or to simply expect fewer
instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70636 91177308-0d34-0410-b5e6-96231b3b80d8

When ScalarEvolution is told to forget the trip count for a loop, have
it also forget any SCEVs associated with loop-header PHIs in the loop,
as they may be dependent on trip count information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70633 91177308-0d34-0410-b5e6-96231b3b80d8

Tell ScalarEvolution that the loop is being deleted before actually
deleting it.  This will let ScalarEvolution be more complete about
updating its records.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70632 91177308-0d34-0410-b5e6-96231b3b80d8

Don't append ".b" to the names of globals that are being shrunk to booleans.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70630 91177308-0d34-0410-b5e6-96231b3b80d8

Don't split critical edges during the AddUsersIfInteresting phase
of LSR. This makes the AddUsersIfInteresting phase of LSR a pure
analysis instead of a phase that potentially does CFG modifications.

The conditions where this code would actually perform a split are
rare, and in the cases where it actually would do a split the split
is usually undone by CodeGenPrepare, and in cases where splits
actually survive into codegen, they appear to hurt more often than
they help.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70625 91177308-0d34-0410-b5e6-96231b3b80d8

Add Base.td to svn:ignore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70619 91177308-0d34-0410-b5e6-96231b3b80d8

'The attached patch fixes an issue where llc -march=cpp fails with
"Invalid primitive type" on input containing the x86_fp80 type.'
Patch by Collin Winter!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70610 91177308-0d34-0410-b5e6-96231b3b80d8

Drop the default assumption about alignment down to 2 bits from 3.  This apparently
helps some problems on win32 platforms (PR4119)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70603 91177308-0d34-0410-b5e6-96231b3b80d8

Change the description string of the LoopInfo pass.
"Construction" makes it sound like a pass that might
modify the CFG to construct natural loops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70580 91177308-0d34-0410-b5e6-96231b3b80d8

Prevent looping when DenseSet is abused.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70572 91177308-0d34-0410-b5e6-96231b3b80d8

HTML-escape '>' as '&gt;' in sample C++ code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70569 91177308-0d34-0410-b5e6-96231b3b80d8

Allow CONCAT_VECTORS nodes to be legal or have custom lowering for some targets.
Changes to take advantage of this will come later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70560 91177308-0d34-0410-b5e6-96231b3b80d8

Actually insert inserted instructions into the InsertedValues map.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70557 91177308-0d34-0410-b5e6-96231b3b80d8