History log of /external/llvm/lib/CodeGen/RegisterScavenging.cpp
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aba6559370c3d453588103fb667ffa3b11b76652 27-Mar-2012 Jakob Stoklund Olesen <stoklund@2pi.dk> Add an MRI::tracksLiveness() flag.

Late optimization passes like branch folding and tail duplication can
transform the machine code in a way that makes it expensive to keep the
register liveness information up to date. There is a fuzzy line between
register allocation and late scheduling where the liveness information
degrades.

The MRI::tracksLiveness() flag makes the line clear: While true,
liveness information is accurate, and can be used for register
scavenging. Once the flag is false, liveness information is not
accurate, and can only be used as a hint.

Late passes generally don't need the liveness information, but they will
sometimes use the register scavenger to help update it. The scavenger
enforces strict correctness, and we have to spend a lot of code to
update register liveness that may never be used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153511 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
9ebfbf8b9fd5f982e0db9293808bd32168615ba9 05-Mar-2012 Craig Topper <craig.topper@gmail.com> Convert more GenRegisterInfo tables from unsigned to uint16_t to reduce static data size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152016 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
e4fd907e72a599eddfa7a81eac4366b5b82523e3 04-Mar-2012 Craig Topper <craig.topper@gmail.com> Use uint16_t to store register overlaps to reduce static data.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152001 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
015f228861ef9b337366f92f637d4e8d624bb006 04-Mar-2012 Craig Topper <craig.topper@gmail.com> Use uint16_t to store registers in callee saved register tables to reduce size of static data.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
cf14613455bc32b6a17821808595263e061335bc 23-Feb-2012 Jakob Stoklund Olesen <stoklund@2pi.dk> Track reserved registers separately from RegsAvailable.

The bulk masking operations from register mask operands don't account
for reserved registers.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
be2af7ee781cd0083124514f497b8cf3070776ec 22-Feb-2012 Jakob Stoklund Olesen <stoklund@2pi.dk> Handle regmasks in RegisterScavenging.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
9f946a24d9e69559d1e0aeb6d128c2fa19846c92 29-Jan-2012 Jakob Stoklund Olesen <stoklund@2pi.dk> Fix some scavenger performance issues.

- Don't call malloc+free in the very hot forward().
- Don't call isTiedToDefOperand().
- Don't create BitVector temporaries.
- Merge DeadRegs into KillRegs.
- Eliminate the early clobber checks, they were irrelevant to scavenging.
- Remove unnecessary code from -Asserts builds.

This speeds up ARM PEI by 3.4x and overall llc -O0 codegen time by 11%.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149189 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
685c23e75842e64145fe319efd792abe72a827dd 29-Jan-2012 Jakob Stoklund Olesen <stoklund@2pi.dk> Avoid creating BitVector temporaries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149188 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
63c66724235ace1860e60a11ce2756d577387b29 16-Jan-2012 Jakob Stoklund Olesen <stoklund@2pi.dk> Give better scavenger errors by invoking the verifier.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
977679d6034791fd48a344e5b990503ba50fc242 07-Jan-2012 Evan Cheng <evan.cheng@apple.com> Added a late machine instruction copy propagation pass. This catches
opportunities that only present themselves after late optimizations
such as tail duplication .e.g.
## BB#1:
movl %eax, %ecx
movl %ecx, %eax
ret

The register allocator also leaves some of them around (due to false
dep between copies from phi-elimination, etc.)

This required some changes in codegen passes. Post-ra scheduler and the
pseudo-instruction expansion passes have been moved after branch folding
and tail merging. They were before branch folding before because it did
not always update block livein's. That's fixed now. The pass change makes
independently since we want to properly schedule instructions after
branch folding / tail duplication.

rdar://10428165
rdar://10640363



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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
1f6a329f79b3568d379142f921f59c4143ddaa14 12-Aug-2011 Duncan Sands <baldrick@free.fr> Silence a bunch (but not all) "variable written but not read" warnings
when building with assertions disabled.


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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
4af0f5fecb42563ff3ca5bd7fddb2f4f111e2fef 30-Jul-2011 Jakob Stoklund Olesen <stoklund@2pi.dk> Revert "Don't check liveness of unallocatable registers."

The ARM target depends on CPSR liveness being tracked after register
allocation.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
eeb57c7701ded683d660ed616966cfe7b1750337 30-Jul-2011 Jakob Stoklund Olesen <stoklund@2pi.dk> Don't check liveness of unallocatable registers.

This includes registers like EFLAGS and ST0-ST7. We don't check for
liveness issues in the verifier and scavenger because registers will
never be allocated from these classes.

While in SSA form, we do care about the liveness of unallocatable
unreserved registers. Liveness of EFLAGS and ST0 neds to be correct for
MachineDCE and MachineSinking.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d61c40360c3acc847263c5e5184b715c17528b09 02-May-2011 Jakob Stoklund Olesen <stoklund@2pi.dk> Handle <def,undef> in the second loop as well.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
2048e4ab7fb4ed45bae2159bae600ddf610303b1 02-May-2011 Jakob Stoklund Olesen <stoklund@2pi.dk> Only ignore <undef> use operands, keep the <def,undef> ops.

Def operands may also have an <undef> flag, but that just means that a
sub-register redef doesn't actually read the super-register. For physical
registers, it has no meaning.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
bdaa9dc4a45b8831c942437f726895eb24a956ba 05-Apr-2011 Bob Wilson <bob.wilson@apple.com> Add an assertion instead of crashing when the scavenger goes past the end
of a basic block.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
27ea9999e84dfb1e6c2baf06ec27a92f12753917 05-Mar-2011 Jim Grosbach <grosbach@apple.com> Teach the register scavenger to take subregs into account when finding a free register.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
9204ddad5c30216e48c5bba0528ba24d66a22e13 02-Sep-2010 Jim Grosbach <grosbach@apple.com> The scavenger should just use getAllocatableSet() rather than reinventing it
locally.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d273a003b6ad27720b2f0bab1a0996150a3d6fbe 02-Sep-2010 Jim Grosbach <grosbach@apple.com> Add a bit of debug output for register scavenging

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112787 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
fcb4a8ead3cd8d9540d5eaa448af5d14a0ee341a 27-Aug-2010 Jim Grosbach <grosbach@apple.com> Simplify eliminateFrameIndex() interface back down now that PEI doesn't need
to try to re-use scavenged frame index reference registers. rdar://8277890

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
ed903d746d96d071305b8182680595ba281b3f12 08-Jul-2010 Jim Grosbach <grosbach@apple.com> Clean up scavengeRegister() a bit to prefer available regs, which allows
the simplification of frame index register scavenging to not have to check
for available registers directly and instead just let scavengeRegister()
handle it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107880 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d9642faf7c66273eb3a8d99e5fa6b542da5374dd 08-Jul-2010 Jim Grosbach <grosbach@apple.com> When processing frame index virtual registers, consider all available registers
(if there are any) and use the one which remains available for the longest
rather than just using the first one. This should help enable better re-use
of the loaded frame index values. rdar://7318760



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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
46df4eb46e784036cf895db271fe29e1cf2a975a 16-Jun-2010 Evan Cheng <evan.cheng@apple.com> Make post-ra scheduling, anti-dep breaking, and register scavenger (conservatively) aware of predicated instructions. This enables ARM to move if-conversion before post-ra scheduler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106091 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
1c8ab781d5b24bc473b4baa8f3fb6e9b55597aa3 04-Jun-2010 Jim Grosbach <grosbach@apple.com> Skip dbg_value instructions when scanning instructions in register scavenging.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105481 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
746ad69e088176819981b4b2c5ac8dcd49f5e60e 06-May-2010 Evan Cheng <evan.cheng@apple.com> Add argument TargetRegisterInfo to loadRegFromStackSlot and storeRegToStackSlot.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103193 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
5ef9d76f6f1afe5a07a9cffe7ce5780d07a25d9c 15-Apr-2010 Jakob Stoklund Olesen <stoklund@2pi.dk> Fix PR6847. RegScavenger should ignore DebugValues.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101392 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
81bf03eb5cd68243eabb52505105aa5f4a831bf3 13-Apr-2010 Dan Gohman <gohman@apple.com> Eliminate MachineBasicBlock::const_livein_iterator and make
MachineBasicBlock::livein_iterator a const_iterator, because
clients shouldn't ever be using the iterator interface to
mutate the livein set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101147 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
7896c9f436a4eda5ec15e882a7505ba482a2fcd0 03-Dec-2009 Chris Lattner <sabre@nondot.org> improve portability to avoid conflicting with std::next in c++'0x.
Patch by Howard Hinnant!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90365 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
60f90618203290f628f295510b8962c1bedd74da 12-Nov-2009 Evan Cheng <evan.cheng@apple.com> RegScavenger::enterBasicBlock should always reset register state.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86972 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
a5dc45e3c8fa26e62b187284a240adf3879b56e2 26-Oct-2009 Evan Cheng <evan.cheng@apple.com> - Revert some changes from 85044, 85045, and 85047 that broke x86_64 tests and
bootstrapping. It's not safe to leave identity subreg_to_reg and insert_subreg
around.
- Relax register scavenging to allow use of partially "not-live" registers. It's
common for targets to operate on registers where the top bits are undef. e.g.
s0 =
d0 = insert_subreg d0<undef>, s0, 1
...
= d0
When the insert_subreg is eliminated by the coalescer, the scavenger used to
complain. The previous fix was to keep to insert_subreg around. But that's
brittle and it's overly conservative when we want to use the scavenger to
allocate registers. It's actually legal and desirable for other instructions
to use the "undef" part of d0. e.g.
s0 =
d0 = insert_subreg d0<undef>, s0, 1
...
s1 =
= s1
= d0
We probably need add a "partial-undef" marker on machine operand so the
machine verifier would not complain.


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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
07d4964d1fc10a404f9bafd7c30b46322fe9293f 25-Oct-2009 Jim Grosbach <grosbach@apple.com> When the scavenger is looking for a good candidate location to restore from a
spill, it should avoid doing so inside the live range of a virtual register.


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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
29bed1c8bb491a5fe609d58c5e560929117a859e 22-Oct-2009 Jim Grosbach <grosbach@apple.com> The spill restore needs to be resolved to the SP/FP just like the spill

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d482f55af135081aee7f7ab972bb8973f189c88f 20-Oct-2009 Jim Grosbach <grosbach@apple.com> Adjust the scavenge register spilling to allow the target to choose an
appropriate restore location for the spill as well as perform the actual
save and restore.

The Thumb1 target uses this to make sure R12 is not clobbered while a spilled
scavenger register is live there.



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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
b58f498f7502e7e1833decbbbb4df771367c7341 07-Oct-2009 Jim Grosbach <grosbach@apple.com> Add register-reuse to frame-index register scavenging. When a target uses
a virtual register to eliminate a frame index, it can return that register
and the constant stored there to PEI to track. When scavenging to allocate
for those registers, PEI then tracks the last-used register and value, and
if it is still available and matches the value for the next index, reuses
the existing value rather and removes the re-materialization instructions.
Fancier tracking and adjustment of scavenger allocations to keep more
values live for longer is possible, but not yet implemented and would likely
be better done via a different, less special-purpose, approach to the
problem.

eliminateFrameIndex() is modified so the target implementations can return
the registers they wish to be tracked for reuse.

ARM Thumb1 implements and utilizes the new mechanism. All other targets are
simply modified to adjust for the changed eliminateFrameIndex() prototype.



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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
6e214805b1163c0e3cd218963c9e66ea244956b2 06-Oct-2009 Jim Grosbach <grosbach@apple.com> grammar

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83378 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
540b05d227a79443b2a7b07d5152a35cb6392abf 06-Oct-2009 Jim Grosbach <grosbach@apple.com> In Thumb1, the register scavenger is not always able to use an emergency
spill slot. When frame references are via the frame pointer, they will be
negative, but Thumb1 load/store instructions only allow positive immediate
offsets. Instead, Thumb1 will spill to R12.



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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
366e021fb2cb0efb8e727ef5e40bd55cef974c7a 30-Sep-2009 Jim Grosbach <grosbach@apple.com> replace TRI->isVirtualRegister() with TargetRegisterInfo::isVirtualRegister()
per customary usage

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
a9a9c95f6789946d5df34185725fc28cebad8b16 29-Sep-2009 Jim Grosbach <grosbach@apple.com> Additional check for regno==0

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83103 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
9ab2238df9f921970554cae8e7f6f7ad23d6c626 29-Sep-2009 Jim Grosbach <grosbach@apple.com> Moving register scavenging to a post pass results in virtual registers in
the instruction we're scavenging for. The scavenger needs to know to avoid
them when analyzing register usage.



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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
393e277ecd02f52443633f6bfacdd1d4c6981212 24-Sep-2009 Evan Cheng <evan.cheng@apple.com> Fix PR5024 with a big hammer: disable the double-def assertion in the scavenger.

LiveVariables add implicit kills to correctly track partial register kills. This works well enough and is fairly accurate. But coalescer can make it impossible to maintain these markers. e.g.

BL <ga:sss1>, %R0<kill,undef>, %S0<kill>, %R0<imp-def>, %R1<imp-def,dead>, %R2<imp-def,dead>, %R3<imp-def,dead>, %R12<imp-def,dead>, %LR<imp-def,dead>, %D0<imp-def>, ...
...
%reg1031<def> = FLDS <cp#1>, 0, 14, %reg0, Mem:LD4[ConstantPool]
...
%S0<def> = FCPYS %reg1031<kill>, 14, %reg0, %D0<imp-use,kill>

When reg1031 and S0 are coalesced, the copy (FCPYS) will be eliminated the the implicit-kill of D0 is lost. In this case it's possible to move the marker to the FLDS. But in many cases, this is not possible. Suppose

%reg1031<def> = FOO <cp#1>, %D0<imp-def>
...
%S0<def> = FCPYS %reg1031<kill>, 14, %reg0, %D0<imp-use,kill>

When FCPYS goes away, the definition of S0 is the "FOO" instruction. However, transferring the D0 implicit-kill to FOO doesn't work since it is the def of D0 itself. We need to fix this in another time by introducing a "kill" pseudo instruction to track liveness.

Disabling the assertion is not ideal, but machine verifier is doing that job now. It's important to know double-def is not a miscomputation since it means a register should be free but it's not tracked as free. It's a performance issue instead.


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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
c0823fe7c679ca8f7d1667a310c2fca97b9402d5 18-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Simplify RegScavenger::FindUnusedReg.

- Drop the Candidates argument and fix all callers. Now that RegScavenger
tracks available registers accurately, there is no need to restict the
search.
- Make sure that no aliases of the found register are in use. This was a potential bug.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
66a39699fb6b862e674415b32d307263812e996e 16-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Replace RegScavenger::DistanceMap with a simpler local algorithm.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
e689ce626ce1d0022f70fb4a85113590bbdbb5e9 16-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Clean up the public interface of RegScavenger.

Remove unused methods and make others private.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
16b794d25accbc4c5db63bb4d172049f052f0a55 15-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Refine EarlyClobber assert in register scavenger.

It is legal for an inline asm operand to use an earlyclobber register if the
use operand is tied to the earlyclobber operand. The issue is discussed here:

http://gcc.gnu.org/ml/gcc/1999-04n/msg00431.html

We should perhaps let only the machine code verifier worry about these finer
details. EarlyClobber operands are not really interesting to the scavenger.

This fixes PR4528 for the third time.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
06789e23d1aa0bcd935a3fba3eff0ec8a35b9c01 13-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Track pristine registers as if they were live-in in the register scavenger.

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/external/llvm/lib/CodeGen/RegisterScavenging.cpp
8c54a620618a77f18af4bb5a0fb48dc741044b91 11-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Rebuild RegScavenger::DistanceMap each time it is needed.

The register scavenger maintains a DistanceMap that maps MI pointers to their
distance from the top of the current MBB. The DistanceMap is built
incrementally in forward() and in bulk in findFirstUse(). It is used by
scavengeRegister() to determine which candidate register has the longest
unused interval.

Unfortunately the DistanceMap contents can become outdated. The first time
scavengeRegister() is called, the DistanceMap is filled to cover the MBB. If
then instructions are inserted in the MBB (as they always are following
scavengeRegister()), the recorded distances are too short. This causes bad
behaviour in the included test case where a register use /after/ the current
position is ignored because findFirstUse() thinks is is /before/ the current
position. A "using an undefined register" assertion follows promptly.

The fix is to build a fresh DistanceMap at the top of scavengeRegister(), and
discard it after use. This means that DistanceMap is no longer needed as a
RegScavenger member variable, and forward() doesn't need to update it.

The fix then discloses issue number two in the same test case: The candidate
search in scavengeRegister() finds a CSR that has been saved in the prologue,
but is currently unused. It would be both inefficient and wrong to spill such
a register in the emergency spill slot. In the present case, the emergency
slot restore is placed immediately before the normal epilogue restore, leading
to a "Redefining a live register" assertion.

Fix number two: When scavengerRegister() stumbles upon an unused register that
is overwritten later in the MBB, return that register early. It is important
to verify that the register is defined later in the MBB, otherwise it might be
an unspilled CSR.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78650 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
9390cd0e86cb3b79f6836acab2a27b275e5bde9e 08-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Remove RegisterScavenger::isSuperRegUsed(). This completely reverses the mistaken commit r77904.

Now there is no special treatment of instructions that redefine part of a
super-register. Instead, the super-register is marked with <imp-use,kill> and
<imp-def>. For instance, from LowerSubregs on ARM:

subreg: CONVERTING: %Q1<def> = INSERT_SUBREG %Q1<undef>, %D1<kill>, 5
subreg: %D2<def> = FCPYD %D1<kill>, 14, %reg0, %Q1<imp-def>

subreg: CONVERTING: %Q1<def> = INSERT_SUBREG %Q1, %D0<kill>, 6
subreg: %D3<def> = FCPYD %D0<kill>, 14, %reg0, %Q1<imp-use,kill>, %Q1<imp-def>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78466 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
dffb051c21d32209c601ca0ca6baae75b6c6463f 08-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Simplify RegScavenger::forward a bit more.

Verify that early clobber registers and their aliases are not used.

All changes to RegsAvailable are now done as a transaction so the order of
operands makes no difference.

The included test case is from PR4686. It has behaviour that was dependent on the order of operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78465 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
c40f6130344c53d5f0833838eddca1f94670ea1d 08-Aug-2009 Evan Cheng <evan.cheng@apple.com> Back out some of recent register scavenger change by John Mosby. It broke a number of ARM tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78421 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
31f5591c91d4c012901018013aba19b0015fa6a0 06-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Get rid of RegScavenger::backwards() before the bitrot spreads.

If we need it one day, there is nothing wrong with putting it back in.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78337 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
e0161ea1050fd4107f3307b1e25b3aac02c2ba16 06-Aug-2009 John Mosby <ojomojo@gmail.com> Reg Scavenging generalization (Thumb support):
- start support for new PEI w/reg alloc, allow running RS from emit{Pro,Epi}logue() target hooks.
- fix minor issue with recursion detection.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78318 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
323e7d32ab256ba8847ba4ed176b5cd7d0bec3ad 04-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Clean up the handling of two-address operands in RegScavenger.

This fixes PR4528.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78107 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
f955cbf56f130cdeb4c6c8aaa4a2715d420c1327 04-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Don't give implicit machine operands special treatment in the register scavenger.

Imp-def is *not* allowed to redefine a live register.
Imp-use is *not* allowed to use a dead register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78106 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
7d35249e897dc655c7c884b83d5cb39478ae497c 04-Aug-2009 Evan Cheng <evan.cheng@apple.com> Fix PR4528. This scavenger assertion is too strict. The two-address value is
killed by another operand.

There is probably a better fix. Either 1) scavenger can look at other operands, or
2) livevariables can be smarter about kill markers. Patches welcome.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78072 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
b36eb9df205aa83cfdfc8ecebc93e1043d6253d9 02-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Fix issue in regscavenger when scavenging a callee-saved register that has not been spilled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77912 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
0e6a4efdd4f97137fb0a58d7bb3de07562185530 02-Aug-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Scavenger asserts.

Allow imp-def and imp-use of anything in the scavenger asserts, just like the machine code verifier.
Allow redefinition of a sub-register of a live register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77904 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
1e0c1588b1b030a1402cf1865b63faf060e44a39 22-Jul-2009 Evan Cheng <evan.cheng@apple.com> Ignore undef uses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76799 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
72fbc3d9d260e061bdee07059fcd63772c714091 16-Jul-2009 Jakob Stoklund Olesen <stoklund@2pi.dk> Fix bug in RegScavenger::scavengeRegister().

Reserved registers are not candidates for scavenging, and they were removed
from the candidate list like this:

CreateRegClassMask(RC, Candidates);
Candidates ^= ReservedRegs;

However, when there are reserved registers outside RC, this causes invalid
bits to be set in Candidates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75847 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
f36892335b4919b9120e48a792e6b3630b9de978 12-Jul-2009 Torok Edwin <edwintorok@gmail.com> Fix assert(0) conversion, as suggested by Chris.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75423 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
7d696d80409aad20bb5da0fc4eccab941dd371d4 11-Jul-2009 Torok Edwin <edwintorok@gmail.com> Convert more assert(0)+abort() -> LLVM_UNREACHABLE,
and abort()/exit() -> llvm_report_error().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75363 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
459a7c6b6ad9c4fcb9f119aa6eaaf2769b00d9b1 01-Jul-2009 Evan Cheng <evan.cheng@apple.com> Remove special handling of implicit_def. Fix a couple more bugs in liveintervalanalysis and coalescer handling of implicit_def.

Note, isUndef marker must be placed even on implicit_def def operand or else the scavenger will not ignore it. This is necessary because -O0 path does not use liveintervalanalysis, it treats implicit_def just like any other def.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74601 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
2578ba26e72e36dde64be0f52a2788480aad3378 01-Jul-2009 Evan Cheng <evan.cheng@apple.com> Handle IMPLICIT_DEF with isUndef operand marker, part 2. This patch moves the code to annotate machineoperands to LiveIntervalAnalysis. It also add markers for implicit_def that define physical registers. The rest, is just a lot of details.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74580 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
50564ebc9e3d7ff806062023e6511e91065df0d2 30-Jun-2009 Evan Cheng <evan.cheng@apple.com> Temporarily restore the scavenger implicit_def checking code. MachineOperand isUndef mark is not being put on implicit_def of physical registers (created for parameter passing, etc.).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74519 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
4784f1fc73abf6005b7b7262d395af71b57b1255 30-Jun-2009 Evan Cheng <evan.cheng@apple.com> Add a bit IsUndef to MachineOperand. This indicates the def / use register operand is defined by an implicit_def. That means it can def / use any register and passes (e.g. register scavenger) can feel free to ignore them.

The register allocator, when it allocates a register to a virtual register defined by an implicit_def, can allocate any physical register without worrying about overlapping live ranges. It should mark all of operands of the said virtual register so later passes will do the right thing.

This is not the best solution. But it should be a lot less fragile to having the scavenger try to track what is defined by implicit_def.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74518 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
4a274e573dbbd4a6085de0d3c738c801b9d000c5 12-Jun-2009 Evan Cheng <evan.cheng@apple.com> If killed register is defined by implicit_def, do not clear it since it's live range may overlap another def of same register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73255 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d9df5017040489303acb57bdd8697ef0f8bafc08 09-Apr-2009 Bob Wilson <bob.wilson@apple.com> Fix pr3954. The register scavenger asserts for inline assembly with
register destinations that are tied to source operands. The
TargetInstrDescr::findTiedToSrcOperand method silently fails for inline
assembly. The existing MachineInstr::isRegReDefinedByTwoAddr was very
close to doing what is needed, so this revision makes a few changes to
that method and also renames it to isRegTiedToUseOperand (for consistency
with the very similar isRegTiedToDefOperand and because it handles both
two-address instructions and inline assembly with tied registers).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68714 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d68a07650cdb2e18f18f362ba533459aa10e01b6 05-Jan-2009 Dan Gohman <gohman@apple.com> Tidy up #includes, deleting a bunch of unnecessary #includes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61715 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
2755896fd048d189bedc5e99e776b3eca010dd4e 23-Dec-2008 Devang Patel <dpatel@apple.com> Silience unused warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61390 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
1385758215bb31ba042a3d42e40d28e521616a0c 19-Dec-2008 Dan Gohman <gohman@apple.com> Initialize the ImplicitDefed member, to avoid getting stale
data from a previous block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61237 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d118342b25eb6a3a67792cda9fce9b4c1e45a867 02-Dec-2008 Dan Gohman <gohman@apple.com> Fix a typo in a comment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60434 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d37c13cfd1bf4b08d0b99d93c799a1caa74cf3c6 20-Nov-2008 Evan Cheng <evan.cheng@apple.com> - Register scavenger should use MachineRegisterInfo and internal map to find the first use of a register after a given machine instruction.
- When scavenging a register, in addition to the spill, insert a restore before the first use.
- Abort if client is looking to scavenge a register even when a previously scavenged register is still live.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59697 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
3a5b020292408421e2605cb15a4741062f2c74b6 19-Nov-2008 Evan Cheng <evan.cheng@apple.com> Make the same change to RegScavenger::backward.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59566 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
63a431c6704e711713b0258bd987cfb257767cf4 18-Nov-2008 Evan Cheng <evan.cheng@apple.com> We also need to keep the operand index for two address check.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59562 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
9c64bf3905ea338719800008c03d95a17cb26689 18-Nov-2008 Evan Cheng <evan.cheng@apple.com> Register scavenger should process early clobber defs first. A dead early clobber def should not interfere with a normal def which happens one slot later.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59559 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d735b8019b0f297d7c14b55adcd887af24d8e602 03-Oct-2008 Dan Gohman <gohman@apple.com> Switch the MachineOperand accessors back to the short names like
isReg, etc., from isRegister, etc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57006 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
4542611bb9793e8376d7d5f33b4a1e2d11712894 07-Jul-2008 Dan Gohman <gohman@apple.com> Minor const-correctness fixes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53196 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
43e2a035309f4e353a8bd5547d10125414597e74 27-May-2008 Duncan Sands <baldrick@free.fr> Fix some constructs that gcc-4.4 warns about.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51591 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
5d3600f5766e93cb459ef6108fba00c052aa6388 11-Apr-2008 Evan Cheng <evan.cheng@apple.com> Allow registers defined by implicit_def to be clobbered.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49512 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
1dc7869025d91906e8305e921ddb82dac780d70e 05-Apr-2008 Evan Cheng <evan.cheng@apple.com> 1. IMPLICIT_DEF can *re-define* any register.
2. Coalescer can now create an interesting situation where a register def can
reaches itself without being killed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49246 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d93ae242d3bb0a306c05a03dad9bf3ec8eba8ceb 08-Mar-2008 Bill Wendling <isanbard@gmail.com> Something that kills a super-register also
kills the sub-register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48038 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d68f47c6fd744e051f7f2d97b6366d40bf27c438 07-Mar-2008 Evan Cheng <evan.cheng@apple.com> Fixed a register scavenger bug. If a def is re-defining part of a super register, there must be an implicit def of the super-register on the MI.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48024 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
ed1fcd8987a7d39ca69bfa3cbf14b270738f029c 07-Mar-2008 Bill Wendling <isanbard@gmail.com> When setting the "unused" info, take into account something like this:

%r3<def> = OR %x3<kill>, %x3

We don't want to mark the %r3 as unused even though it's a sub-register of %x3.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48003 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
6130f66eaae89f8878590796977678afa8448926 05-Mar-2008 Evan Cheng <evan.cheng@apple.com> Refactor code. Remove duplicated functions that basically do the same thing as
findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47927 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
a0a570cec647b860a724f4f70a191bc83cdcc947 03-Mar-2008 Bill Wendling <isanbard@gmail.com> Make the register scavenger update the bookkeeping values for sub/super
registers.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47861 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
527c250a9080a5b6cf0053a6215037c3769ff4a0 16-Feb-2008 Bill Wendling <isanbard@gmail.com> Fix typos.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47200 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
6f0d024a534af18d9e60b3ea757376cd8a3a980e 10-Feb-2008 Dan Gohman <gohman@apple.com> Rename MRegisterInfo to TargetRegisterInfo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46930 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
749c6f6b5ed301c84aac562e414486549d7b98eb 07-Jan-2008 Chris Lattner <sabre@nondot.org> rename TargetInstrDescriptor -> TargetInstrDesc.
Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45695 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
69244300b8a0112efb44b6273ecea4ca6264b8cf 07-Jan-2008 Chris Lattner <sabre@nondot.org> Rename MachineInstr::getInstrDescriptor -> getDesc(), which reflects
that it is cheap and efficient to get.

Move a variety of predicates from TargetInstrInfo into
TargetInstrDescriptor, which makes it much easier to query a predicate
when you don't have TII around. Now you can use MI->getDesc()->isBranch()
instead of going through TII, and this is much more efficient anyway. Not
all of the predicates have been moved over yet.

Update old code that used MI->getInstrDescriptor()->Flags to use the
new predicates in many places.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45674 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
f6372aa1cc568df19da7c5023e83c75aa9404a07 01-Jan-2008 Owen Anderson <resistor@mac.com> Move some more instruction creation methods from RegisterInfo into InstrInfo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45484 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
4ee451de366474b9c228b4e5fa573795a715216d 29-Dec-2007 Chris Lattner <sabre@nondot.org> Remove attribution from file headers, per discussion on llvmdev.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
d64b5c82b97ad1b74eb9fd2f23257a7899b0c307 05-Dec-2007 Evan Cheng <evan.cheng@apple.com> Add a argument to storeRegToStackSlot and storeRegToAddr to specify whether
the stored register is killed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44600 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
92dfe2001e96f6e2b6d327e8816f38033f88b295 14-Sep-2007 Dan Gohman <gohman@apple.com> Remove isReg, isImm, and isMBB, and change all their users to use
isRegister, isImmediate, and isMachineBasicBlock, which are equivalent,
and more popular.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41958 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
5db322acefc3089c133b8f3a33fa0a3ce90e2001 05-Jul-2007 Evan Cheng <evan.cheng@apple.com> Better assertion messages.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37890 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
8e3347332120956538a6d882b02719e34b57f0cd 01-May-2007 Evan Cheng <evan.cheng@apple.com> If call frame is not part of stack frame and no dynamic alloc, eliminateFrameIndex() must adjust SP offset with size of call frames.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36625 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
faa510726f4b40aa4495e60e4d341c6467e3fb01 26-Apr-2007 Evan Cheng <evan.cheng@apple.com> Rename findRegisterUseOperand to findRegisterUseOperandIdx to avoid confusion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36483 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
595b6d121cbbae3f58e508ae928b4ed917e686b6 03-Apr-2007 Evan Cheng <evan.cheng@apple.com> Bad bad bug. findRegisterUseOperand() returns -1 if a use if not found.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35618 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
c6b9ef80a890fcf75f18cabc3fe2d5f9ef2faaf5 27-Mar-2007 Dale Johannesen <dalej@apple.com> Fix reversed logic in getRegsUsed. Rename RegStates to RegsAvailable to
hopefully forestall similar errors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35362 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
69cb9b78f11d505f4351a269fc90e7b77fcda437 20-Mar-2007 Dale Johannesen <dalej@apple.com> maintain LiveIn when splitting blocks (register scavenging needs it)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35226 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
caddd590f72376aaac531c1004be0535b460992a 06-Mar-2007 Evan Cheng <evan.cheng@apple.com> Minor bug fix.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34985 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
b74a3e6fda768eb6160559e025f8b65c46db46d9 06-Mar-2007 Evan Cheng <evan.cheng@apple.com> Register scavenger is now capable of scavenging. It spills a register whose use of furthest away to make it available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34964 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
5de3b7f35131b3c17e0b3c711d47ab3fb2c1e9be 02-Mar-2007 Evan Cheng <evan.cheng@apple.com> Mark dead def as unused.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34844 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
5196b3680cf8df32b6c763e3d97e963e45150e5a 01-Mar-2007 Evan Cheng <evan.cheng@apple.com> Add a version of FindUnusedReg that restrict search to a specific set of registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34784 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
a3756ee7fe384210eddcfd66e2934439960b13a1 01-Mar-2007 Evan Cheng <evan.cheng@apple.com> Interface clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34770 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
898218cc5edecea1275ee266b2cd13313ea6b67b 27-Feb-2007 Evan Cheng <evan.cheng@apple.com> Some more code clean up.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34700 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
8cab162e03d7ae0638a3ab51e92ac228abe17d55 27-Feb-2007 Evan Cheng <evan.cheng@apple.com> Oops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34698 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
bb6fb3357d6c1e9ffb15de4893e59e3bbdd600a3 27-Feb-2007 Evan Cheng <evan.cheng@apple.com> RegScavenger interface change to make it more flexible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34690 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
ed570dedad945e1fe9a4bfeaa47276d875f1feed 27-Feb-2007 Evan Cheng <evan.cheng@apple.com> forward() should not increment internal iterator. Its client may insert instruction between now and next forward() call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34649 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
0badfea274f9612780caccbad6e1870f39ed9f40 25-Feb-2007 Evan Cheng <evan.cheng@apple.com> Add an assertion.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34596 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
403c45dfcc74585b02339b5f55f739672e3d141a 23-Feb-2007 Evan Cheng <evan.cheng@apple.com> Mark livein registers as being in used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34525 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp
96fa612373e258120d351ed14361f964ad22f99d 23-Feb-2007 Evan Cheng <evan.cheng@apple.com> Initial check in of register scavenger. Its only current functionality is tracking live registers per MBB.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34511 91177308-0d34-0410-b5e6-96231b3b80d8
/external/llvm/lib/CodeGen/RegisterScavenging.cpp