The defined registers are already serialized - they are represented by placing
them before the '=' in a machine instruction. However, certain instructions like
INLINEASM can have defined register operands after the '=', so this commit
introduces the 'def' register flag for such operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245480 91177308-0d34-0410-b5e6-96231b3b80d8
This commit adds support for bit mask target flag serialization to the MIR
printer and the MIR parser. It also adds support for the machine operand's
target flag serialization to the AArch64 target.
Reviewers: Duncan P. N. Exon Smith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@245383 91177308-0d34-0410-b5e6-96231b3b80d8
method.
This commit extracts the code that parses the stack object references into a
new method named 'parseStackFrameIndex', so that it can be reused when
parsing standalone stack object references.
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This commit modifies the way the machine basic blocks are serialized - now the
machine basic blocks are serialized using a custom syntax instead of relying on
YAML primitives. Instead of using YAML mappings to represent the individual
machine basic blocks in a machine function's body, the new syntax uses a single
YAML block scalar which contains all of the machine basic blocks and
instructions for that function.
This is an example of a function's body that uses the old syntax:
body:
- id: 0
name: entry
instructions:
- '%eax = MOV32r0 implicit-def %eflags'
- 'RETQ %eax'
...
The same body is now written like this:
body: |
bb.0.entry:
%eax = MOV32r0 implicit-def %eflags
RETQ %eax
...
This syntax change is motivated by the fact that the bundled machine
instructions didn't map that well to the old syntax which was using a single
YAML sequence to store all of the machine instructions in a block. The bundled
machine instructions internally use flags like BundledPred and BundledSucc to
determine the bundles, and serializing them as MI flags using the old syntax
would have had a negative impact on the readability and the ease of editing
for MIR files. The new syntax allows me to serialize the bundled machine
instructions using a block construct without relying on the internal flags,
for example:
BUNDLE implicit-def dead %itstate, implicit-def %s1 ... {
t2IT 1, 24, implicit-def %itstate
%s1 = VMOVS killed %s0, 1, killed %cpsr, implicit killed %itstate
}
This commit also converts the MIR testcases to the new syntax. I developed
a script that can convert from the old syntax to the new one. I will post the
script on the llvm-commits mailing list in the thread for this commit.
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This commit extracts the code that parses the memory operand's alignment into
a new method named 'parseAlignment' so that it can be reused when parsing the
basic block's alignment attribute.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244945 91177308-0d34-0410-b5e6-96231b3b80d8
This commit renames the method 'diagFromLLVMAssemblyDiag' to
'diagFromBlockStringDiag'. This method will be used when converting diagnostics
from other YAML block strings, and not just the LLVM module block string, so
the new name should reflect that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244943 91177308-0d34-0410-b5e6-96231b3b80d8
This commit fixes a bug where MI parser couldn't resolve the named IR
references that referenced named global values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244817 91177308-0d34-0410-b5e6-96231b3b80d8
This commit moves the code that parses the frame indices for the fixed stack
objects from the method 'parseFixedStackObjectOperand' to a new method named
'parseFixedStackFrameIndex', so that it can be reused when parsing fixed stack
pseudo source values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244814 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the UsedPhysRegMask register mask from the machine
register information class. The mask is serialized as an inverted
'calleeSavedRegisters' mask to keep the output minimal.
This commit also allows the MIR parser to infer this mask from the register
mask operands if the machine function doesn't specify it.
Reviewers: Duncan P. N. Exon Smith
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This commit extract the code that parses the 64-bit offset from the method
'parseOperandsOffset' to a new method 'parseOffset' so that we can reuse it
when parsing the offset for the machine memory operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244355 91177308-0d34-0410-b5e6-96231b3b80d8
The block address machine operands can reference IR blocks in other functions.
This commit fixes a bug where the references to unnamed IR blocks in other
functions weren't serialized correctly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244299 91177308-0d34-0410-b5e6-96231b3b80d8
This commit removes the 'StringOffset' and 'HasStringValue' fields from the
MIToken struct and simplifies the 'stringValue' method which now returns
the new 'StringValue' field.
This commit also adopts a different way of initializing the lexed tokens -
instead of constructing a new MIToken instance, the lexer resets the old token
using the new 'reset' method and sets its attributes using the new
'setStringValue', 'setOwnedStringValue', and 'setIntegerValue' methods.
Reviewers: Sean Silva
Differential Revision: http://reviews.llvm.org/D11792
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244295 91177308-0d34-0410-b5e6-96231b3b80d8
This commit implements the initial serialization of the machine operand target
flags. It extends the 'TargetInstrInfo' class to add two new methods that help
to provide text based serialization for the target flags.
This commit can serialize only the X86 target flags, and the target flags for
the other targets will be serialized in the follow-up commits.
Reviewers: Duncan P. N. Exon Smith
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This commit serializes the offset for the following operands: target index,
global address, external symbol, constant pool index, and block address.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244157 91177308-0d34-0410-b5e6-96231b3b80d8
This commit extracts the code that parses the IR constant values into a new
method named 'parseIRConstant' in the 'MIParser' class. The new method will
be reused by the code that parses the typed integer immediate machine operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244093 91177308-0d34-0410-b5e6-96231b3b80d8
The machine instructions lexer should not expose the difference between quoted
and unquoted tokens to the parser.
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This commit serializes the save and restore machine basic block references from
the machine frame information class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243575 91177308-0d34-0410-b5e6-96231b3b80d8
This commit extracts the code that's used by the class 'MIRParserImpl' to parse
the machine basic block references into a new method named 'parseMBBReference'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243572 91177308-0d34-0410-b5e6-96231b3b80d8
This commit extracts the code that parses a global value from the method
'parseGlobalAddressOperand' into a new method 'parseGlobalValue', so that this
code can be reused by the method which will parse the block address machine
operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243450 91177308-0d34-0410-b5e6-96231b3b80d8
This commit moves the function 'lexName' to the start of the file so it can
be reused by the function which will lex the named LLVM IR block references.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243449 91177308-0d34-0410-b5e6-96231b3b80d8
This commit removes the redundant parameters from the two methods
'initializeRegisterInfo' and 'initializeFrameInfo'. The removed parameters are
redundant as we are already passing in the 'MachineFunction' to those methods,
and those parameters can be derived from the machine function parameter.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243445 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the references from the machine basic blocks to the
unnamed basic blocks.
This commit adds a new attribute to the machine basic block's YAML mapping
called 'ir-block'. This attribute contains the actual reference to the
basic block.
Reviewers: Duncan P. N. Exon Smith
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This commit renames the methods 'parseMBB' and 'parseNamedRegister' to
'parseStandaloneMBB' and 'parseStandaloneNamedRegister' in order for their
names to be consistent with the method 'parseStandaloneVirtualRegister'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243319 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the callee saved information from the class
'MachineFrameInfo'. This commit extends the YAML mappings for the fixed and
the ordinary stack objects and adds an optional 'callee-saved-register'
attribute. This attribute is used to serialize the callee save information.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243173 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the virtual register allocations hints of type 0.
These hints specify the preferred physical registers for allocations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243156 91177308-0d34-0410-b5e6-96231b3b80d8
This change would allow the machine instruction parser to reuse this method when
parsing the metadata node for the machine instruction's debug location property.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242934 91177308-0d34-0410-b5e6-96231b3b80d8
This commit begins serialization of the CFI index machine operands by
serializing one kind of CFI instruction - the .cfi_def_cfa_offset instruction.
Reviewers: Duncan P. N. Exon Smith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242845 91177308-0d34-0410-b5e6-96231b3b80d8
This commit refactors the function 'maybeLexGlobalValue' so that now it reuses
the function 'lexName' when lexing a named global value token.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242837 91177308-0d34-0410-b5e6-96231b3b80d8
This commit implements the initial serialization of machine constant pools and
the constant pool index machine operands. The constant pool is serialized using
a YAML sequence of YAML mappings that represent the constant values.
The target-specific constant pool items aren't serialized by this commit.
Reviewers: Duncan P. N. Exon Smith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242707 91177308-0d34-0410-b5e6-96231b3b80d8
This commit extends the machine instruction lexer and implements support for
the quoted global value tokens. With this change the syntax for the global value
identifier tokens becomes identical to the syntax for the global identifier
tokens from the LLVM's assembly language.
Reviewers: Duncan P. N. Exon Smith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242702 91177308-0d34-0410-b5e6-96231b3b80d8
This commit modifies the machine instruction lexer so that it now accepts the
'$' characters in identifier tokens.
This change makes the syntax for unquoted global value tokens consistent with
the syntax for the global idenfitier tokens in the LLVM's assembly language.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242584 91177308-0d34-0410-b5e6-96231b3b80d8
The jump table info is serialized using a YAML mapping that contains its kind
and a YAML sequence of jump table entries. A jump table entry is a YAML mapping
that has an ID and an inline YAML sequence of machine basic block references.
The testcase 'CodeGen/MIR/X86/jump-table-info.mir' doesn't have any instructions
because one of them contains a jump table index operand. The jump table index
operands will be serialized in a follow up patch, and the appropriate
instructions will be added to this testcase.
Reviewers: Duncan P. N. Exon Smith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242357 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the references to the named LLVM alloca instructions from
the stack objects in the machine frame info. This commit adds a field 'Name' to
the struct 'yaml::MachineStackObject'. This new field is used to store the name
of the alloca instruction when the alloca is present and when it has a name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242339 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the sub register indices from the register machine
operands.
Reviewers: Duncan P. N. Exon Smith
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242084 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the fixed stack objects, including fixed spill slots.
The fixed stack objects are serialized using a YAML sequence of YAML inline
mappings. Each mapping has the object's ID, type, size, offset, and alignment.
The objects that aren't spill slots also serialize the isImmutable and isAliased
flags.
The fixed stack objects are a part of the machine function's YAML mapping.
Reviewers: Duncan P. N. Exon Smith
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This commit implements the initial serialization of stack objects from the
MachineFrameInfo class. It can only serialize the ordinary stack objects
(including ordinary spill slots), but it doesn't serialize variable sized or
fixed stack objects yet.
The stack objects are serialized using a YAML sequence of YAML inline mappings.
Each mapping has the object's ID, type, size, offset and alignment. The stack
objects are a part of machine function's YAML mapping.
Reviewers: Duncan P. N. Exon Smith
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The virtual registers are serialized using a YAML sequence of YAML inline
mappings. Each mapping has the id of the virtual register and the register
class.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10981
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This commit adds a new error which is reported when the MIR Parser encounters
a machine function without any machine basic blocks. The machine verifier
expects that the machine functions have at least one MBB, and this error will
prevent machine functions without MBBs from reaching the machine verifier and
crashing with an assertion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241862 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the 13 scalar boolean and integer attributes from the
MachineFrameInfo class: IsFrameAddressTaken, IsReturnAddressTaken, HasStackMap,
HasPatchPoint, StackSize, OffsetAdjustment, MaxAlignment, AdjustsStack,
HasCalls, MaxCallFrameSize, HasOpaqueSPAdjustment, HasVAStart, and
HasMustTailInVarArgFunc. These attributes are serialized as part
of the frameInfo YAML mapping, which itself is a part of the machine function's
YAML mapping.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241844 91177308-0d34-0410-b5e6-96231b3b80d8
This commit changes the type of the field 'Name' in the struct
'yaml::MachineBasicBlock' from 'std::string' to 'yaml::StringValue'. This change
allows the MIR parser to report errors related to the MBB name with the proper
source locations.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241718 91177308-0d34-0410-b5e6-96231b3b80d8
This commit modifies the interface for the machine instruction parsing
functions by wrapping the parameter 'MBBSlots' in a new structure called
'PerFunctionMIParsingState'. This change is useful as in the future I will be
able to pass new parameters to the machine instruction parser just by modifying
the 'PerFunctionMIParsingState' structure instead of adding a new parameter to
each function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241607 91177308-0d34-0410-b5e6-96231b3b80d8
This commit verifies that the parsed machine instructions contain the implicit
register operands as specified by the MCInstrDesc. Variadic and call
instructions aren't verified.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10781
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241537 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the implicit flag for the register machine operands. It
introduces two new keywords into the machine instruction syntax: 'implicit' and
'implicit-def'. The 'implicit' keyword is used for the implicit register
operands, and the 'implicit-def' keyword is used for the register operands that
have both the implicit and the define flags set.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10709
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241519 91177308-0d34-0410-b5e6-96231b3b80d8
This commit implements serialization of the machine basic block successors. It
uses a YAML flow sequence that contains strings that have the MBB references.
The MBB references in those strings use the same syntax as the MBB machine
operands in the machine instruction strings.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10699
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241093 91177308-0d34-0410-b5e6-96231b3b80d8
This commit extracts the code that reports an error that's produced by the
machine instruction parser into a new method that can be reused in other places.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241086 91177308-0d34-0410-b5e6-96231b3b80d8
This commit refactors the interface for machine instruction parser. It adopts
the pattern of returning a bool and passing in the result in the first argument
that is used by the other parsing methods for the the method 'parse' and the
function 'parseMachineInstr'.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241085 91177308-0d34-0410-b5e6-96231b3b80d8
This commit refactors the machine instruction lexer so that the lexing
functions use the 'maybeLex...' pattern, where they determine if they
can lex the current token by themselves.
Reviewers: Sean Silva
Differential Revision: http://reviews.llvm.org/D10817
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241078 91177308-0d34-0410-b5e6-96231b3b80d8
This commit implements serialization of the register mask machine
operands. This commit serializes only the call preserved register
masks that are defined by a target, it doesn't serialize arbitrary
register masks.
This commit also extends the TargetRegisterInfo class and TableGen so that
the users of TRI can get the list of all the call preserved register masks and
their names.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10673
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240966 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the global address machine operands.
This commit doesn't serialize the operand's offset and target
flags, it serializes only the global value reference.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10671
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240851 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes machine basic block operands. The
machine basic block operands use the following syntax:
%bb.<id>[.<name>]
This commit also modifies the YAML representation for the
machine basic blocks - a new, required field 'id' is added
to the MBB YAML mapping.
The id is used to resolve the MBB references to the
actual MBBs. And while the name of the MBB can be
included in a MBB reference, this name isn't used to
resolve MBB references - as it's possible that multiple
MBBs will reference the same BB and thus they will have the
same name. If the name is specified, the parser will verify
that it is equal to the name of the MBB with the specified id.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10608
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240792 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the 3 scalar boolean attributes from the
MachineRegisterInfo class: IsSSA, TracksRegLiveness, and
TracksSubRegLiveness. These attributes are serialized as part
of the machine function YAML mapping.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10618
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240579 91177308-0d34-0410-b5e6-96231b3b80d8
This commit serializes the null register machine operands.
It uses the '_' keyword to represent them, but the parser
also allows the '%noreg' named register syntax.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10580
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240558 91177308-0d34-0410-b5e6-96231b3b80d8
This commit translates the source locations for MIParser diagnostics from
the locations in the machine instruction string to the locations in the
MIR file.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10574
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240474 91177308-0d34-0410-b5e6-96231b3b80d8
This commit introduces functionality that's used to serialize machine operands.
Only the physical register operands are serialized by this commit.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10525
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240425 91177308-0d34-0410-b5e6-96231b3b80d8
This commit adds a function that tokenizes the string containing
the machine instruction. This commit also adds a struct called
'MIToken' which is used to represent the lexer's tokens.
Reviewers: Sean Silva
Differential Revision: http://reviews.llvm.org/D10521
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240323 91177308-0d34-0410-b5e6-96231b3b80d8
This commit implements initial machine instruction serialization. It
serializes machine instruction names. The instructions are represented
using a YAML sequence of string literals and are a part of machine
basic block YAML mapping.
This commit introduces a class called 'MIParser' which will be used to
parse the machine instructions and operands.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10481
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240295 91177308-0d34-0410-b5e6-96231b3b80d8
This commit reports an error when the MIR parser can't find
a basic block with the machine basic block's name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit implements the initial serialization of machine basic blocks in a
machine function. Only the simple, scalar MBB attributes are serialized. The
reference to LLVM IR's basic block is preserved when that basic block has a name.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10465
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240145 91177308-0d34-0410-b5e6-96231b3b80d8
This commit reports an error when a machine function from a MIR file that contains
LLVM IR can't find a function with the same name in the loaded LLVM IR module.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10468
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239831 91177308-0d34-0410-b5e6-96231b3b80d8
This commit creates a dummy LLVM IR function with one basic block and an unreachable
instruction for each parsed machine function when the MIR file doesn't have LLVM IR.
This change is required as the machine function analysis pass creates machine
functions only for the functions that are defined in the current LLVM module.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10135
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239778 91177308-0d34-0410-b5e6-96231b3b80d8
This commit reports an error when the MIR parser encounters a machine
function with the name that is the same as the name of a different
machine function.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10130
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239774 91177308-0d34-0410-b5e6-96231b3b80d8
This commit connects the machine function analysis pass (which creates machine
functions) to the MIR parser, which will initialize the machine functions
with the state from the MIR file and reconstruct the machine IR.
This commit introduces a new interface called 'MachineFunctionInitializer',
which can be used to provide custom initialization for the machine functions.
This commit also introduces a new diagnostic class called
'DiagnosticInfoMIRParser' which is used for MIR parsing errors.
This commit modifies the default diagnostic handling in LLVMContext - now the
the diagnostics are printed directly into llvm::errs() so that the MIR parsing
errors can be printed with colours.
Reviewers: Justin Bogner
Differential Revision: http://reviews.llvm.org/D9928
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This commit translates the line and column numbers for LLVM IR
errors from the numbers in the YAML block scalar to the numbers
in the MIR file so that the MIRParser users can report LLVM IR
errors with the correct line and column numbers.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D10108
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This commit introduces a serializable structure called
'llvm::yaml::MachineFunction' that stores the machine
function's name. This structure will mirror the machine
function's state in the future.
This commit prints machine functions as YAML documents
containing a YAML mapping that stores the state of a machine
function. This commit also parses the YAML documents
that contain the machine functions.
Reviewers: Duncan P. N. Exon Smith
Differential Revision: http://reviews.llvm.org/D9841
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This commit a 3rd attempt at comitting the initial MIR serialization patch.
The first commit (r237708) was reverted in 237730. Then the second commit
(r237954) was reverted in r238007, as the MIR library under CodeGen caused
a circular dependency where the CodeGen library depended on MIR and MIR
library depended on CodeGen.
This commit has fixed the dependencies between CodeGen and MIR by
reorganizing the MIR serialization code - the code that prints out
MIR has been moved to CodeGen, and the MIR library has been renamed
to MIRParser. Now the CodeGen library doesn't depend on the
MIRParser library, thus the circular dependency no longer exists.
--Original Commit Message--
MIR Serialization: print and parse LLVM IR using MIR format.
This commit is the initial commit for the MIR serialization project.
It creates a new library under CodeGen called 'MIR'. This new
library adds a new machine function pass that prints out the LLVM IR
using the MIR format. This pass is then added as a last pass when a
'stop-after' option is used in llc. The new library adds the initial
functionality for parsing of MIR files as well. This commit also
extends the llc tool so that it can recognize and parse MIR input files.
Reviewers: Duncan P. N. Exon Smith, Matthias Braun, Philip Reames
Differential Revision: http://reviews.llvm.org/D9616
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