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Localmods came from: https://codereview.chromium.org/10825082/, and earlier.
(1) The original change was so that byval parameters always
go on the stack. That part was added because the original
ARM code was buggy, and did not actually make a copy of the
value, modifying the caller's struct (ouch!).
(2) Then came a localmod to make all arguments following a
byval go on the stack and to make the var-args code aware of
that. This is so that arguments stay in the correct order
for var-args to pick up.
For (1) there has been some work upstream to make it work
better. In any case, clang with --target=armv7a-...-gnueabi
only used byval in some limited cases -- when the size of
the struct is > 64 bytes where the backend will know
that part of it could be in regs, and the rest can be
memcpy'ed to the stack.
For le32, clang will still generate byval without
satisfying the same ARM condition (only for structs
bigger than 64 bytes), so it could be *very bad* if
we didn't have the ABI simpification passes rewrite
the byval and try to let the ARM backend do things
with byval...
TEST=the GCC torture tests: va-arg-4.c, and 20030914-2.c
and the example in issue 2746 still pass.
BUG=none, cleanup
R=dschuff@chromium.org
Review URL: https://codereview.chromium.org/23691009
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BUG=None
R=dschuff@chromium.org
Review URL: https://codereview.chromium.org/19472003
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Conflicts:
docs/LangRef.rst
include/llvm/CodeGen/CallingConvLower.h
include/llvm/IRReader/IRReader.h
include/llvm/Target/TargetMachine.h
lib/CodeGen/CallingConvLower.cpp
lib/IRReader/IRReader.cpp
lib/IRReader/LLVMBuild.txt
lib/IRReader/Makefile
lib/LLVMBuild.txt
lib/Makefile
lib/Support/MemoryBuffer.cpp
lib/Support/Unix/PathV2.inc
lib/Target/ARM/ARMBaseInstrInfo.cpp
lib/Target/ARM/ARMISelLowering.cpp
lib/Target/ARM/ARMInstrInfo.td
lib/Target/ARM/ARMSubtarget.cpp
lib/Target/ARM/ARMTargetMachine.cpp
lib/Target/Mips/CMakeLists.txt
lib/Target/Mips/MipsDelaySlotFiller.cpp
lib/Target/Mips/MipsISelLowering.cpp
lib/Target/Mips/MipsInstrInfo.td
lib/Target/Mips/MipsSubtarget.cpp
lib/Target/Mips/MipsSubtarget.h
lib/Target/X86/X86FastISel.cpp
lib/Target/X86/X86ISelDAGToDAG.cpp
lib/Target/X86/X86ISelLowering.cpp
lib/Target/X86/X86InstrControl.td
lib/Target/X86/X86InstrFormats.td
lib/Transforms/IPO/ExtractGV.cpp
lib/Transforms/InstCombine/InstCombineCompares.cpp
lib/Transforms/Utils/SimplifyLibCalls.cpp
test/CodeGen/X86/fast-isel-divrem.ll
test/MC/ARM/data-in-code.ll
tools/Makefile
tools/llvm-extract/llvm-extract.cpp
tools/llvm-link/CMakeLists.txt
tools/opt/CMakeLists.txt
tools/opt/LLVMBuild.txt
tools/opt/Makefile
tools/opt/opt.cpp
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r181842 | arnolds | 2013-05-14 15:33:24 -0700 (Tue, 14 May 2013) | 14 lines
ARM ISel: Don't create illegal types during LowerMUL
The transformation happening here is that we want to turn a
"mul(ext(X), ext(X))" into a "vmull(X, X)", stripping off the extension. We have
to make sure that X still has a valid vector type - possibly recreate an
extension to a smaller type. In case of a extload of a memory type smaller than
64 bit we used create a ext(load()). The problem with doing this - instead of
recreating an extload - is that an illegal type is exposed.
This patch fixes this by creating extloads instead of ext(load()) sequences.
Fixes PR15970.
radar://13871383
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Now even the small structures could be passed within byval (small enough
to be stored in GPRs).
In regression tests next function prototypes are checked:
PR15293:
%artz = type { i32 }
define void @foo(%artz* byval %s)
define void @foo2(%artz* byval %s, i32 %p, %artz* byval %s2)
foo: "s" stored in R0
foo2: "s" stored in R0, "s2" stored in R2.
Next AAPCS rules are checked:
5.5 Parameters Passing, C.4 and C.5,
"ParamSize" is parameter size in 32bit words:
-- NSAA != 0, NCRN < R4 and NCRN+ParamSize > R4.
Parameter should be sent to the stack; NCRN := R4.
-- NSAA != 0, and NCRN < R4, NCRN+ParamSize < R4.
Parameter stored in GPRs; NCRN += ParamSize.
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1. VarArgStyleRegisters: functionality that emits "store" instructions for byval regs moved out into separated method "StoreByValRegs". Before this patch VarArgStyleRegisters had confused use-cases. It was used for both variadic functions and for regular functions with byval parameters. In last case it created new stack-frame and registered it as VarArg frame, that is wrong.
This patch replaces VarArgsStyleRegisters usage for byval parameters with StoreByValRegs method.
2. In ARMMachineFunctionInfo, "get/setVarArgsRegSaveSize" was renamed to "get/setArgRegsSaveSize". By the same reason. Sometimes it was used for variadic functions, and sometimes for byval parameters in regular functions. Actually, this property means the size of registers, that keeps arguments, and thats why it was renamed.
3. In ARMISelLowering.cpp, ARMTargetLowering class, in methods computeRegArea and StoreByValRegs, VARegXXXXXX was renamed to ArgRegsXXXXXX still by the same reasons.
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strengthen condition check to require actual MVT::i32 virtual register types, just in case (no actual functionality change)
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functionality change.
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-- C.4 and C.5 statements, when NSAA is not equal to SP.
-- C.1.cp statement for VA functions. Note: There are no VFP CPRCs in a
variadic procedure.
Before this patch "NSAA != 0" means "don't use GPRs anymore ". But there are
some exceptions in AAPCS.
1. For non VA function: allocate all VFP regs for CPRC. When all VFPs are allocated
CPRCs would be sent to stack, while non CPRCs may be still allocated in GRPs.
2. Check that for VA functions all params uses GPRs and then stack.
No exceptions, no CPRCs here.
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I think it's almost impossible to fold atomic fences profitably under
LLVM/C++11 semantics. As a result, this is now unused and just
cluttering up the target interface.
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parameter attribute 'returned', which is taken advantage of in target-independent tail call opportunity detection and in ARM call lowering (when placed on an integral first parameter).
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It was superseded by MachineBlockPlacement and disabled by default since LLVM 3.1.
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The ARM backend currently has poor codegen for long sext/zext
operations, such as v8i8 -> v8i32. This patch addresses this
by performing a custom expansion in ARMISelLowering. It also
adds/changes the cost of such lowering in ARMTTI.
This partially addresses PR14867.
Patch by Pete Couperus
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177380 91177308-0d34-0410-b5e6-96231b3b80d8
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Conflicts:
include/llvm/CodeGen/LexicalScopes.h
include/llvm/MC/MCAsmInfo.h
lib/Linker/LinkArchives.cpp
lib/Linker/LinkItems.cpp
lib/MC/MCAsmInfo.cpp
lib/MC/MCDwarf.cpp
lib/Target/ARM/ARMInstrInfo.td
lib/Target/ARM/ARMSubtarget.cpp
lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp
lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp
lib/Target/Mips/MipsAsmPrinter.cpp
lib/Target/Mips/MipsDelaySlotFiller.cpp
lib/Target/Mips/MipsISelDAGToDAG.cpp
lib/Target/Mips/MipsSubtarget.cpp
lib/Target/Mips/MipsSubtarget.h
lib/Target/Mips/MipsTargetObjectFile.cpp
lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp
lib/Target/X86/X86FastISel.cpp
lib/Target/X86/X86ISelLowering.cpp
lib/Target/X86/X86TargetMachine.cpp
lib/Transforms/CMakeLists.txt
lib/Transforms/LLVMBuild.txt
lib/Transforms/Makefile
test/MC/ARM/arm_instructions.s
test/MC/X86/AlignedBundling/pad-align-to-bundle-end.s
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The VDUP instruction source register doesn't allow a non-constant lane
index, so make sure we don't construct a ARM::VDUPLANE node asking it to
do so.
rdar://13328063
http://llvm.org/bugs/show_bug.cgi?id=13963
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Mark them as expand, they are not legal as our backend does not match them.
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dispatch code. As far as I can tell the thumb2 code is behaving as expected.
I was able to compile and run the associated test case for both arm and thumb1.
rdar://13066352
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rdar://13306723
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http://llvm.org/docs/CodingStandards.html#name-types-functions-variables-and-enumerators-properly
ivars should be camel-case and start with an upper-case letter. A few in
TargetLowering were starting with a lower-case letter.
No functional change intended.
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Lower reverse shuffles to a vrev64 and a vext instruction instead of the default
legalization of storing and loading to the stack. This is important because we
generate reverse shuffles in the loop vectorizer when we reverse store to an
array.
uint8_t Arr[N];
for (i = 0; i < N; ++i)
Arr[N - i - 1] = ...
radar://13171760
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Conflicts:
include/llvm/CodeGen/IntrinsicLowering.h
include/llvm/MC/MCAssembler.h
include/llvm/MC/MCObjectStreamer.h
lib/LLVMBuild.txt
lib/Linker/LinkArchives.cpp
lib/MC/MCAssembler.cpp
lib/MC/MCELFStreamer.cpp
lib/MC/MCParser/AsmParser.cpp
lib/MC/MCPureStreamer.cpp
lib/MC/WinCOFFStreamer.cpp
lib/Makefile
lib/Support/Unix/Memory.inc
lib/Support/Unix/Process.inc
lib/Support/Unix/Program.inc
lib/Target/ARM/ARM.h
lib/Target/ARM/ARMFastISel.cpp
lib/Target/ARM/ARMISelLowering.cpp
lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
lib/Target/Mips/MipsInstrFPU.td
lib/Target/X86/CMakeLists.txt
lib/Target/X86/X86ISelLowering.cpp
lib/Target/X86/X86TargetMachine.cpp
lib/Target/X86/X86TargetObjectFile.cpp
lib/Transforms/InstCombine/InstCombineCalls.cpp
test/CodeGen/X86/fast-isel-x86-64.ll
tools/llc/llc.cpp
tools/lto/LTOModule.cpp
utils/TableGen/EDEmitter.cpp
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More details in this thread: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130128/163783.html
Patch by JF Bastien
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The ARM and Thumb variants of LDREXD and STREXD have different constraints and
take different operands. Previously the code expanding atomic operations didn't
take this into account and asserted in Thumb mode.
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conditions are met:
1. They share the same operand and are in the same BB.
2. Both outputs are used.
3. The target has a native instruction that maps to ISD::FSINCOS node or
the target provides a sincos library call.
Implemented the generic optimization in sdisel and enabled it for
Mac OSX. Also added an additional optimization for x86_64 Mac OSX by
using an alternative entry point __sincos_stret which returns the two
results in xmm0 / xmm1.
rdar://13087969
PR13204
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If the sutraction of the higher 32 bit parts gives a 0 result, we need to do the store operation.
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deplib features commented out due to removal upstream;
will add back as a localmod
Conflicts:
include/llvm/ADT/Triple.h
include/llvm/MC/MCAssembler.h
include/llvm/Target/TargetFrameLowering.h
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
lib/CodeGen/AsmPrinter/DwarfDebug.h
lib/CodeGen/BranchFolding.cpp
lib/LLVMBuild.txt
lib/Linker/LinkArchives.cpp
lib/MC/MCAssembler.cpp
lib/MC/MCELFStreamer.cpp
lib/Makefile
lib/Target/ARM/ARMExpandPseudoInsts.cpp
lib/Target/ARM/ARMFrameLowering.cpp
lib/Target/ARM/ARMISelLowering.cpp
lib/Target/ARM/ARMSubtarget.h
lib/Target/ARM/ARMTargetObjectFile.cpp
lib/Target/ARM/MCTargetDesc/ARMAsmBackend.cpp
lib/Target/Mips/MipsInstrFPU.td
lib/Target/Mips/MipsInstrInfo.td
lib/Target/X86/X86CodeEmitter.cpp
lib/Target/X86/X86Subtarget.h
lib/VMCore/Module.cpp
test/MC/MachO/ARM/nop-armv4-padding.s
tools/Makefile
tools/llc/llc.cpp
tools/lto/LTOModule.cpp
tools/lto/lto.cpp
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a TargetMachine to construct (and thus isn't always available), to an
analysis group that supports layered implementations much like
AliasAnalysis does. This is a pretty massive change, with a few parts
that I was unable to easily separate (sorry), so I'll walk through it.
The first step of this conversion was to make TargetTransformInfo an
analysis group, and to sink the nonce implementations in
ScalarTargetTransformInfo and VectorTargetTranformInfo into
a NoTargetTransformInfo pass. This allows other passes to add a hard
requirement on TTI, and assume they will always get at least on
implementation.
The TargetTransformInfo analysis group leverages the delegation chaining
trick that AliasAnalysis uses, where the base class for the analysis
group delegates to the previous analysis *pass*, allowing all but tho
NoFoo analysis passes to only implement the parts of the interfaces they
support. It also introduces a new trick where each pass in the group
retains a pointer to the top-most pass that has been initialized. This
allows passes to implement one API in terms of another API and benefit
when some other pass above them in the stack has more precise results
for the second API.
The second step of this conversion is to create a pass that implements
the TargetTransformInfo analysis using the target-independent
abstractions in the code generator. This replaces the
ScalarTargetTransformImpl and VectorTargetTransformImpl classes in
lib/Target with a single pass in lib/CodeGen called
BasicTargetTransformInfo. This class actually provides most of the TTI
functionality, basing it upon the TargetLowering abstraction and other
information in the target independent code generator.
The third step of the conversion adds support to all TargetMachines to
register custom analysis passes. This allows building those passes with
access to TargetLowering or other target-specific classes, and it also
allows each target to customize the set of analysis passes desired in
the pass manager. The baseline LLVMTargetMachine implements this
interface to add the BasicTTI pass to the pass manager, and all of the
tools that want to support target-aware TTI passes call this routine on
whatever target machine they end up with to add the appropriate passes.
The fourth step of the conversion created target-specific TTI analysis
passes for the X86 and ARM backends. These passes contain the custom
logic that was previously in their extensions of the
ScalarTargetTransformInfo and VectorTargetTransformInfo interfaces.
I separated them into their own file, as now all of the interface bits
are private and they just expose a function to create the pass itself.
Then I extended these target machines to set up a custom set of analysis
passes, first adding BasicTTI as a fallback, and then adding their
customized TTI implementations.
The fourth step required logic that was shared between the target
independent layer and the specific targets to move to a different
interface, as they no longer derive from each other. As a consequence,
a helper functions were added to TargetLowering representing the common
logic needed both in the target implementation and the codegen
implementation of the TTI pass. While technically this is the only
change that could have been committed separately, it would have been
a nightmare to extract.
The final step of the conversion was just to delete all the old
boilerplate. This got rid of the ScalarTargetTransformInfo and
VectorTargetTransformInfo classes, all of the support in all of the
targets for producing instances of them, and all of the support in the
tools for manually constructing a pass based around them.
Now that TTI is a relatively normal analysis group, two things become
straightforward. First, we can sink it into lib/Analysis which is a more
natural layer for it to live. Second, clients of this interface can
depend on it *always* being available which will simplify their code and
behavior. These (and other) simplifications will follow in subsequent
commits, this one is clearly big enough.
Finally, I'm very aware that much of the comments and documentation
needs to be updated. As soon as I had this working, and plausibly well
commented, I wanted to get it committed and in front of the build bots.
I'll be doing a few passes over documentation later if it sticks.
Commits to update DragonEgg and Clang will be made presently.
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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.
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directly.
This is in preparation for removing the use of the 'Attribute' class as a
collection of attributes. That will shift to the AttributeSet class instead.
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This reverts r170694. The operations can be represented in IR without
adding any new intrinsics.
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llvm.arm.neon.vsub[su].* intrinsics.
Patch by Pete Couperus <pjcoup@gmail.com>
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Use the version that also takes an MF reference instead.
It would technically be possible to extract an MF reference from the MI
as MI->getParent()->getParent(), but that would not work for MIs that
are not inserted into any basic block.
Given the reasonably small number of places this constructor was used at
all, I preferred the compile time check to a run time assertion.
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of EVT.
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single attribute in the future.
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Accordingly, add helper funtions getSimpleValueType (in parallel to
getValueType) in SDValue, SDNode, and TargetLowering.
This is the first, in a series of patches.
This is the second attempt. In the first attempt (r169837), a few
getSimpleVT() were hoisted too far, detected by bootstrap failures.
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mention the inline memcpy / memset expansion code is a mess?
This patch split the ZeroOrLdSrc argument into two: IsMemset and ZeroMemset.
The first indicates whether it is expanding a memset or a memcpy / memmove.
The later is whether the memset is a memset of zero. It's totally possible
(likely even) that targets may want to do different things for memcpy and
memset of zero.
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Also added more comments to explain why it is generally ok to return true.
- Rename getOptimalMemOpType argument IsZeroVal to ZeroOrLdSrc. It's meant to
be true for loaded source (memcpy) or zero constants (memset). The poor name
choice is probably some kind of legacy issue.
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f64 load / store on non-SSE2 x86 targets.
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ScalarTargetTransformInfo::getIntImmCost() instead. "Legal" is a poorly defined
term for something like integer immediate materialization. It is always possible
to materialize an integer immediate. Whether to use it for memcpy expansion is
more a "cost" conceern.
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