Commit Graph

357 Commits

Author SHA1 Message Date
Tim Northover bbbfb1cfb8 GlobalISel: translate insertvalue instructions.
This adds a G_INSERT instruction, which technically makes G_SEQUENCE redundant
(it's equivalent to a G_INSERT into an IMPLICIT_DEF). We'll leave G_SEQUENCE
for now though: it's likely to be far more common as it's a fundamental part of
legalization, so avoiding the mess and bloat of the extra IMPLICIT_DEFs is
probably worthwhile.

llvm-svn: 279306
2016-08-19 20:08:55 +00:00
Tim Northover 26b76f2c59 GlobalISel: improve representation of G_SEQUENCE and G_EXTRACT
First, make sure all types involved are represented, rather than being implicit
from the register width.

Second, canonicalize all types to scalar. These operations just act in bits and
don't care about vectors.

Also standardize spelling of Indices in the MachineIRBuilder (NFC here).

llvm-svn: 279294
2016-08-19 18:32:14 +00:00
Tim Northover 2fa5fa391f GlobalISel: allow extractvalue to extract an aggregate.
llvm-svn: 279287
2016-08-19 18:09:41 +00:00
Tim Northover 6f80b08c64 GlobalISel: support translation of extractvalue instructions.
llvm-svn: 279285
2016-08-19 17:47:05 +00:00
Tim Northover 91c8173093 GlobalISel: support overflow arithmetic intrinsics.
Unsigned addition and subtraction can reuse the instructions created to
legalize large width operations (i.e. both produce and consume a carry flag).
Signed operations and multiplies get a dedicated op-with-overflow instruction.

Once this is produced the two values are combined into a struct register (which
will almost always be merged with a corresponding G_EXTRACT as part of
legalization).

llvm-svn: 279278
2016-08-19 17:17:06 +00:00
Tim Northover de3aea0412 GlobalISel: support irtranslation of icmp instructions.
llvm-svn: 278969
2016-08-17 20:25:25 +00:00
Tim Northover 28fdc4272d GlobalISel: support loads and stores of strange types.
Before we mischaracterized structs and i1 types as a scalar with size 0 in
various ways.

llvm-svn: 278744
2016-08-15 21:13:17 +00:00
Tim Northover 8e0c53a018 GlobalISel: support 'null' constant in translation.
It's sharing the integer G_CONSTANT for now since I don't *think* it creates
any ambiguity (even on weird archs). If that turns out wrong we can create a
G_PTRCONSTANT or something.

llvm-svn: 278423
2016-08-11 21:40:55 +00:00
Tim Northover 0d51044b69 GlobalISel: clear vreg mapping after translating each function
Otherwise we only materialize (shared) constants in the first function they
appear in. This doesn't go well.

llvm-svn: 278351
2016-08-11 16:21:29 +00:00
Tim Northover 357f1be2ca GlobalISel: support same ConstantExprs as Instructions.
It's more than just inttoptr, but the others can't be tested until we have
support for non-trivial constants (they currently get unavoidably folded to a
ConstantInt).

llvm-svn: 278303
2016-08-10 23:02:41 +00:00
Tim Northover 406024a108 GlobalISel: implement simple function calls on AArch64.
We're still limited in the arguments we support, but this at least handles the
basic cases.

llvm-svn: 278293
2016-08-10 21:44:01 +00:00
Tim Northover 7552ef5a00 GlobalISel: avoid inserting redundant COPYs for bitcasts.
If the value produced by the bitcast hasn't been referenced yet, we can simply
reuse the input register avoiding an unnecessary COPY instruction.

llvm-svn: 278245
2016-08-10 16:51:14 +00:00
Tim Northover d403a3d8ee GlobalISel: support 'undef' constant.
llvm-svn: 278174
2016-08-09 23:01:30 +00:00
Tim Northover 5ed648e509 GlobalISel: first translation support for Constants.
For now put them all in the entry block. This should be correct but may give
poor runtime performance. Hopefully MachineSinking combined with
isReMaterializable can solve those issues, but if not the interface is sound
enough to support alternatives.

llvm-svn: 278168
2016-08-09 21:28:04 +00:00
Tim Northover 14e7f73a0f GlobalISel: clear pending phis after MachineFunction translated
Test is just reordering the existing functions (it would trigger for any
function after one with a phi).

llvm-svn: 277841
2016-08-05 17:50:36 +00:00
Tim Northover 97d0cb3165 GlobalISel: IRTranslate PHI instructions
llvm-svn: 277835
2016-08-05 17:16:40 +00:00
Tim Northover 1cfa919b3d GlobalISel: add support for G_MUL
llvm-svn: 277774
2016-08-04 21:39:44 +00:00
Tim Northover 06db18fbf8 GlobalISel: also add G_TRUNC to IRTranslator.
llvm-svn: 277749
2016-08-04 18:35:17 +00:00
Tim Northover 5fc93b75d9 GlobalISel: translate "unreachable" (into nothing)
Easiest instruction ever!

llvm-svn: 277225
2016-07-29 22:41:55 +00:00
Tim Northover 5fb414d870 GlobalISel: support translation of intrinsic calls.
These come in two variants for now: G_INTRINSIC and G_INTRINSIC_W_SIDE_EFFECTS.
We may decide to split the latter up with finer-grained restrictions later, if
necessary.

llvm-svn: 277224
2016-07-29 22:32:36 +00:00
Tim Northover 0d56e05a12 GlobalISel: make translate* functions take the most specialized class possible.
NFC.

llvm-svn: 277188
2016-07-29 18:11:21 +00:00
Tim Northover 69c2ba546f GlobalISel: add generic conditional branch.
Just the basic equivalent to DAG's condbr for now, we'll get to things like
br_cc when we start doing more legalization.

llvm-svn: 277184
2016-07-29 17:58:00 +00:00
Tim Northover a51575ffa2 CodeGen: improve MachineInstrBuilder & MachineIRBuilder interface
For MachineInstrBuilder, having to manually use RegState::Define is ugly and
makes register definitions clunkier than they need to be, so this adds two
convenience functions: addDef and addUse.

For MachineIRBuilder, we want to avoid BuildMI's first-reg-is-def rule because
it's hidden away and causes bugs. So this patch switches buildInstr to
returning a MachineInstrBuilder and adding *all* operands via addDef/addUse.

NFC.

llvm-svn: 277176
2016-07-29 17:43:52 +00:00
Ahmed Bougacha 784e3423e6 [GlobalISel] Add G_XOR.
llvm-svn: 277172
2016-07-29 16:56:20 +00:00
Matthias Braun 93320393a4 Missed updating a GlobalISel bit in my last commit
GlobalISel isn't built by default so I missed it.

llvm-svn: 277030
2016-07-28 20:13:42 +00:00
Tim Northover 8d2f52e035 GlobalISel: support zero-sized allocas
All allocas must be at least 1 byte at the MachineIR level so we allocate just
one byte.

llvm-svn: 276897
2016-07-27 17:47:54 +00:00
Tim Northover ad2b717f2c GlobalISel: add generic load and store instructions.
Pretty straightforward, the only oddity is the MachineMemOperand (which it's
surprisingly difficult to share code for).

llvm-svn: 276799
2016-07-26 20:23:26 +00:00
Tim Northover 756eca35cf GlobalISel: add specialized buildCopy function to MachineInstrBuilder.
NFC.

llvm-svn: 276763
2016-07-26 16:45:30 +00:00
Tim Northover cc5f76226b GlobalISel: give MachineInstrBuilder a uniform interface. NFC.
Instead of an ad-hoc collection of "buildInstr" functions with varying numbers
of registers, this uses variadic templates to provide for as many regs as
needed!

Also make IRtranslator use new "buildBr" function instead of some weird generic
one that no-one else would really use.

llvm-svn: 276762
2016-07-26 16:45:26 +00:00
Tim Northover 884b47ecfd GlobalISel: remove redundant ';'s. NFC
llvm-svn: 276723
2016-07-26 03:29:18 +00:00
Tim Northover 7c9eba90ff GlobalISel: add generic casts to IRTranslator
This adds LLVM's 3 main cast instructions (inttoptr, ptrtoint, bitcast) to the
IRTranslator. The first two are direct translations (with 2 MachineInstr types
each). Since LLT discards information, a bitcast might become trivial and we
emit a COPY in those cases instead.

llvm-svn: 276690
2016-07-25 21:01:29 +00:00
Tim Northover bd5054602e GlobalISel: implement alloca instruction
llvm-svn: 276433
2016-07-22 16:59:52 +00:00
Quentin Colombet 2b59eab79f [IRTranslator] Add G_SUB opcode.
This commit adds a generic SUB opcode to global-isel.

llvm-svn: 276308
2016-07-21 17:26:50 +00:00
Quentin Colombet 19df8a1aba [IRTranslator] Add comments to explain the ordering of the switch. NFC.
Group arithmetic operations, bitwise operations, and branch operations.

llvm-svn: 276305
2016-07-21 17:26:41 +00:00
Quentin Colombet 7bcc921dd8 [IRTranslator] Add G_AND opcode.
This commit adds a generic AND opcode to global-isel.

llvm-svn: 276297
2016-07-21 15:50:42 +00:00
Tim Northover 62ae568bbb GlobalISel: implement low-level type with just size & vector lanes.
This should be all the low-level instruction selection needs to determine how
to implement an operation, with the remaining context taken from the opcode
(e.g. G_ADD vs G_FADD) or other flags not based on type (e.g. fast-math).

llvm-svn: 276158
2016-07-20 19:09:30 +00:00
Tim Northover 72eebfa4b0 GlobalISel: freeze reserved regs after IRTranslator.
We can freeze the registers after the MachineFrameInfo has been configured (by
telling it about calls, inline asm, ...). This doesn't happen at all yet, but
will be part of IR translation.

Fixes -verify-machineinstrs assertion.

llvm-svn: 275221
2016-07-12 22:23:42 +00:00
Quentin Colombet f2a1909bb5 [IRTranslator] Support the translation of or.
Now or instructions get translated into G_OR.

llvm-svn: 272433
2016-06-10 20:50:35 +00:00
Quentin Colombet 13c55e07ed [IRTranslator] Refactor to expose a translateBinaryOp method.
This method will be used for every binary operation.

NFC.

llvm-svn: 272431
2016-06-10 20:50:18 +00:00
Tom Stellard b72a65ff53 [GlobalISel] Coding style and whitespace fixes
Reviewers: qcolombet

Subscribers: joker.eph, llvm-commits, vkalintiris

Differential Revision: http://reviews.llvm.org/D19119

llvm-svn: 266342
2016-04-14 17:23:33 +00:00
Quentin Colombet dd4b137364 [IRTranslator] Translate unconditional branches.
llvm-svn: 263265
2016-03-11 17:28:03 +00:00
Quentin Colombet e225e2541b [IRTranslator] Update getOrCreateVReg API to use references.
A value that we want to keep in a virtual register cannot be null.
Reflect that in the API.

llvm-svn: 263263
2016-03-11 17:27:54 +00:00
Quentin Colombet 000b580b13 [MachineIRBuilder] Rename the setter of MF for consistency with the getter.
llvm-svn: 263262
2016-03-11 17:27:51 +00:00
Quentin Colombet 91ebd71e26 [MachineIRBuilder] Rename the setter for MBB for consistency with the getter.
llvm-svn: 263261
2016-03-11 17:27:47 +00:00
Quentin Colombet 53237a9e64 [IRTranslator] Update getOrCreateBB API to use references.
A null basic block is invalid, so just pass a reference.

llvm-svn: 263260
2016-03-11 17:27:43 +00:00
Quentin Colombet 39293d3aaa [GlobalISel] Introduce initializer method to support start/stop-after features.
llvm-svn: 262896
2016-03-08 01:38:55 +00:00
Quentin Colombet ba2a01645b [GlobalISel] Re-apply r260922-260923 with MSVC-friendly code.
Original message:
Get rid of the ifdefs in TargetLowering.
Introduce a new API used only by GlobalISel: CallLowering.
This API will contain target hooks dedicated to call lowering.

llvm-svn: 260998
2016-02-16 19:26:02 +00:00
Aaron Ballman fc64ef1a15 Reverting r260922-260923; they cause link failures with MSVC.
http://lab.llvm.org:8011/builders/lldb-x86-windows-msvc2015/builds/15436/steps/build/logs/stdio
http://bb.pgr.jp/builders/msbuild-llvmclang-x64-msc18-DA/builds/961/steps/build_llvm/logs/stdio

llvm-svn: 260972
2016-02-16 15:29:06 +00:00
Quentin Colombet 1ce38545fb [GlobalISel] Get rid of the ifdefs in TargetLowering.
Introduce a new API used only by GlobalISel: CallLowering.
This API will contain target hooks dedicated to call lowering.

llvm-svn: 260922
2016-02-16 00:57:44 +00:00
Quentin Colombet ccd7725808 [IRTranslator] Use a single virtual register to represent any Value.
PR26161.

llvm-svn: 260602
2016-02-11 21:48:32 +00:00
Quentin Colombet fd9d0a07d8 [GlobalISel] Add the necessary plumbing to lower formal arguments.
llvm-svn: 260579
2016-02-11 19:59:41 +00:00
Quentin Colombet 74d7d2f00b [GlobalISel] Teach the IRTranslator how to lower returns.
llvm-svn: 260562
2016-02-11 18:53:28 +00:00
Quentin Colombet a7fae162e6 [GlobalISel][IRTranslator] Change the ownership of the MIRBuilder field.
llvm-svn: 260551
2016-02-11 17:53:23 +00:00
Quentin Colombet 4f0ec8d2b0 [GlobalISel][IRTranslator] Fix a typo in assert.
llvm-svn: 260550
2016-02-11 17:52:28 +00:00
Quentin Colombet 17c494b91c [GlobalISel][IRTranslator] Teach the pass how to translate Add instructions.
llvm-svn: 260549
2016-02-11 17:51:31 +00:00
Quentin Colombet 2ecff3bff2 [GlobalISel] More detailed skeleton for the IRTranslator.
llvm-svn: 260456
2016-02-10 22:59:27 +00:00
Quentin Colombet 105cf2b179 [GlobalISel] Add the proper cmake plumbing.
This patch adds the necessary plumbing to cmake to build the sources related to
GlobalISel.

To build the sources related to GlobalISel, we need to add -DBUILD_GLOBAL_ISEL=ON.
By default, this is OFF, thus GlobalISel sources will not impact people that do
not explicitly opt-in.

Differential Revision: http://reviews.llvm.org/D15983

llvm-svn: 258344
2016-01-20 20:58:56 +00:00