Use an Init (ultimately a StringInit) to represent the Record name.
This allows the name to be composed by standard TableGen operators.
This will enable us to get rid of the ugly #NAME# hack processing and
naturally replace it with operators. It also increases flexibility
and power of the TableGen language by allowing record identifiers to
be computed dynamically.
llvm-svn: 137232
Make sure TernOpInits are unique and created only once. This will be
important for AVX/SIMD as many operators will be used to generate
patterns and other relevant data.
llvm-svn: 136496
Make sure BinOpInits are unique and created only once. This will be
important for AVX/SIMD as many operators will be used to generate
patterns and other relevant data.
llvm-svn: 136495
Make sure UnOpInits are unique and created only once. This will be
important for AVX/SIMD as many operators will be used to generate
patterns and other relevant data.
llvm-svn: 136494
Ensure ListInits are unique and only created once. This will be
important for AVX as lists will be used extensively to pass generic
patterns, prefix information and other things to lower-level
pattern-generation classes.
llvm-svn: 136493
Use a StringMap to ensure the StringInits are unique. This is
especially important for AVX where we will have many smallish
strings representing instruction prefixes, suffixes and the like.
llvm-svn: 136491
Remove all non-const iterators from Init classes. This is another
step toward constifying Inits and ultimately turning them into
FoldingSetNodes.
llvm-svn: 136484
Create a std::string wrapper for use as a DenseMap key. DenseMap is
not safe in generate with strings, so this wrapper indicates that only
strings guaranteed not to have certain values should be used in the
DenseMap.
llvm-svn: 136481
Make all of the RecTy constructors private, and use get() factory
methods instead. Return singleton instances when it makes sense.
ListTy instance pointers are stored in the element RecTy instance.
BitsRecTy instance pointers, one per length, are stored in a static vector.
Also unique DefInit instances. A Record has a unique DefInit which
has a unique RecordRecTy instance.
This saves some 200k-300k RecTy allocations when parsing ARM.td. It
reduces TableGen's heap usage by almost 50%.
llvm-svn: 135399
Manage Inits in a FoldingSet. This provides several benefits:
- Memory for Inits is properly managed
- Duplicate Inits are folded into Flyweights, saving memory
- It enforces const-correctness, protecting against certain classes
of bugs
The above benefits allow Inits to be used in more contexts, which in
turn provides more dynamism to TableGen. This enhanced capability
will be used by the AVX code generator to a fold common patterns
together.
llvm-svn: 134907
class A<bit a, bits<3> x, bits<3> y> {
bits<3> z;
let z = !if(a, x, y);
}
The variable z will get the value of x when 'a' is 1 and 'y' when a is '0'.
llvm-svn: 121666
Given the pattern below as an example:
list<dag> Pattern = [(set RC:$dst, (v4f32 (shufp:src3 RC:$src1,
(mem_frag addr:$src2))))];
The right reference resolving should lead to:
list<dag> Pattern = [(set VR128:$dst, (v4f32 (shufp:src3 VR128:$src1,
(mem_frag addr:$src2))))];
But was yielding:
list<dag> Pattern = [(set VR128:$dst, (v4f32 (shufp VR128:$src1,
(mem_frag addr:$src2))))];
Fix this by passing the right name when creating a new DagInit node.
llvm-svn: 106670
When a target instruction wants to set target-specific flags, it should simply
set bits in the TSFlags bit vector defined in the Instruction TableGen class.
This works well because TableGen resolves member references late:
class I : Instruction {
AddrMode AM = AddrModeNone;
let TSFlags{3-0} = AM.Value;
}
let AM = AddrMode4 in
def ADD : I;
TSFlags gets the expected bits from AddrMode4 in this example.
llvm-svn: 100384
If a TableGen class has an initializer expression containing an X.Y subexpression,
AND X depends on template parameters,
AND those template parameters have defaults,
AND some parameters with defaults are beyond position 1,
THEN parts of the initializer expression are evaluated prematurely with the default values when the first explicit template parameter is substituted, before the remaining explicit template parameters have been substituted.
llvm-svn: 99492
