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We used to assume that any fixed-offset stack object was not aliased. This
meant that no IR value could point to the memory contained in such an object.
This is a reasonable default, but is not a universally-correct
target-independent fact. For example, on PowerPC (both Darwin and non-Darwin),
some byval arguments are allocated at fixed offsets by the ABI. These, however,
certainly can be pointed to by IR values. This change moves the 'isAliased'
logic out of FixedStackPseudoSourceValue and into MFI, and allows the isAliased
property to be overridden for fixed-offset objects.
This will be used by an upcoming commit to the PowerPC backend to fix PR20280.
No functionality change intended (the behavior of
FixedStackPseudoSourceValue::isAliased has been made more conservative for
callers that don't pass an MFI object, but I don't see any in-tree callers that
do that).
llvm-svn: 215794
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its own tree containing FixedStackPseudoSourceValue (which you can use isa/dyn_cast on) and MipsCallEntry (which you can't). Anything that needs to use either a PseudoSourceValue* and Value* is strongly encouraged to use a MachinePointerInfo instead.
llvm-svn: 206255
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into their new header subdirectory: include/llvm/IR. This matches the
directory structure of lib, and begins to correct a long standing point
of file layout clutter in LLVM.
There are still more header files to move here, but I wanted to handle
them in separate commits to make tracking what files make sense at each
layer easier.
The only really questionable files here are the target intrinsic
tablegen files. But that's a battle I'd rather not fight today.
I've updated both CMake and Makefile build systems (I think, and my
tests think, but I may have missed something).
I've also re-sorted the includes throughout the project. I'll be
committing updates to Clang, DragonEgg, and Polly momentarily.
llvm-svn: 171366
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Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.
Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]
llvm-svn: 169131
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llvm-svn: 148578
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llvm-svn: 120298
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positive where pointers would be leaked on llvm_shutdown.
llvm-svn: 97759
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llvm-svn: 87034
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making it visible to clients and adding LLVM-style cast capability.
This will be used by AsmPrinter to determine when to emit spill comments
for an instruction.
llvm-svn: 87019
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alias any LLVM IR value.
llvm-svn: 85762
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thread safe either.
llvm-svn: 85253
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VISIBILITY_HIDDEN removal.
llvm-svn: 85043
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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
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llvm-svn: 84432
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stack slots and giving them different PseudoSourceValue's did not fix the
problem of post-alloc scheduling miscompiling llvm itself.
- Apply Dan's conservative workaround by assuming any non fixed stack slots can
alias other memory locations. This means a load from spill slot #1 cannot
move above a store of spill slot #2.
- Enable post-alloc scheduling for x86 at optimization leverl Default and above.
llvm-svn: 84424
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llvm-svn: 84321
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necessarily fixed. Only those will negative frame indices are "fixed."
llvm-svn: 84315
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where the element is of a basic builtin type. For example, to get
an i8* use getInt8PtrTy.
llvm-svn: 83379
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two different places for printing MachineMemOperands.
Drop the virtual from Value::dump and instead give Value a
protected virtual hook that can be overridden by subclasses
to implement custom printing. This lets printing be more
consistent, and simplifies printing of PseudoSourceValue
values.
llvm-svn: 82599
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llvm-svn: 78948
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This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").
llvm-svn: 75640
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Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.
llvm-svn: 75379
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explicitly flush it.
llvm-svn: 67526
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on PseudoSourceValue values. This also fixes a FIXME in
lib/VMCode/AsmWriter.cpp.
llvm-svn: 60507
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which isn't needed anymore.
llvm-svn: 55419
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PseudoSourceValue.cpp from the llvm namespace.
llvm-svn: 55293
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llvm-svn: 55291
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AliasAnalysis::pointsToConstantMemory,
and knowledge of PseudoSourceValues. This unfortunately isn't sufficient to allow
constants to be rematerialized in PIC mode -- the extra indirection is a
complication.
llvm-svn: 54000
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llvm-svn: 53562
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instead of using the frame index for the SVOffset, which was
inconsistent.
llvm-svn: 53486
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marked read-write. Use const so that they can be allocated in a
read-only segment.
llvm-svn: 48800
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llvm-svn: 46961
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to return pointers instead of references, since this is always what
is needed.
llvm-svn: 46857
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initializer problem, a minor tweak to the way the
DAGISelEmitter finds load/store nodes, and a renaming of the
new PseudoSourceValue objects.
llvm-svn: 46827
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re-commit.
llvm-svn: 46623
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memory reference information in the backend. Most of this was written by
Florian Brander, cleanup and updating to TOT by me.
llvm-svn: 46556
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