Commit Graph

365 Commits

Author SHA1 Message Date
Lang Hames
59d454959f Rename fp-op fusion option (yet again) for compatibility with GCC option.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159042 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22 22:31:00 +00:00
Lang Hames
e023141322 Rename -allow-excess-fp-precision flag to -fuse-fp-ops, and switch from a
boolean flag to an enum: { Fast, Standard, Strict } (default = Standard).

This option controls the creation by optimizations of fused FP ops that store
intermediate results in higher precision than IEEE allows (E.g. FMAs). The
behavior of this option is intended to match the behaviour specified by a
soon-to-be-introduced frontend flag: '-ffuse-fp-ops'.

Fast mode - allows formation of fused FP ops whenever they're profitable.

Standard mode - allow fusion only for 'blessed' FP ops. At present the only
blessed op is the fmuladd intrinsic. In the future more blessed ops may be
added.

Strict mode - allow fusion only if/when it can be proven that the excess
precision won't effect the result.

Note: This option only controls formation of fused ops by the optimizers.  Fused
operations that are explicitly requested (e.g. FMA via the llvm.fma.* intrinsic)
will always be honored, regardless of the value of this option.

Internally TargetOptions::AllowExcessFPPrecision has been replaced by
TargetOptions::AllowFPOpFusion.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158956 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-22 01:09:09 +00:00
Lang Hames
d693cafcfb Add DAG-combines for aggressive FMA formation.
This patch adds DAG combines to form FMAs from pairs of FADD + FMUL or
FSUB + FMUL. The combines are performed when:
(a) Either
      AllowExcessFPPrecision option (-enable-excess-fp-precision for llc)
        OR
      UnsafeFPMath option (-enable-unsafe-fp-math)
    are set, and
(b) TargetLoweringInfo::isFMAFasterThanMulAndAdd(VT) is true for the type of
    the FADD/FSUB, and
(c) The FMUL only has one user (the FADD/FSUB).

If your target has fast FMA instructions you can make use of these combines by
overriding TargetLoweringInfo::isFMAFasterThanMulAndAdd(VT) to return true for
types supported by your FMA instruction, and adding patterns to match ISD::FMA
to your FMA instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158757 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-19 22:51:23 +00:00
Rafael Espindola
d6b43a317e Move the support for using .init_array from ARM to the generic
TargetLoweringObjectFileELF. Use this to support it on X86. Unlike ARM,
on X86 it is not easy to find out if .init_array should be used or not, so
the decision is made via TargetOptions and defaults to off.

Add a command line option to llc that enables it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158692 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-19 00:48:28 +00:00
Benjamin Kramer
773ef61299 Object file output from llc isn't experimental anymore.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158305 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-11 09:40:10 +00:00
Bob Wilson
6e1b812850 Add an insertPass API to TargetPassConfig. <rdar://problem/11498613>
Besides adding the new insertPass function, this patch uses it to
enhance the existing -print-machineinstrs so that the MachineInstrs
after a specific pass can be printed.

Patch by Bin Zeng!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157655 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-30 00:17:12 +00:00
Kevin Enderby
9ed9e5d0f9 Fix it so llvm-objdump -arch does accept x86 and x86-64 as valid arch names.
PR12731.  Patch by Meador Inge!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156444 91177308-0d34-0410-b5e6-96231b3b80d8
2012-05-08 23:38:45 +00:00
Nick Lewycky
9a1484165c Move the JIT flags from llc to lli. These flags showed up as part of moving
backend flags in TargetOptions.h into their own class in r145714.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154993 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-18 08:34:12 +00:00
Chandler Carruth
253933ee9e Teach LLVM about a PIE option which, when enabled on top of PIC, makes
optimizations which are valid for position independent code being linked
into a single executable, but not for such code being linked into
a shared library.

I discussed the design of this with Eric Christopher, and the decision
was to support an optional bit rather than a completely separate
relocation model. Fundamentally, this is still PIC relocation, its just
that certain optimizations are only valid under a PIC relocation model
when the resulting code won't be in a shared library. The simplest path
to here is to expose a single bit option in the TargetOptions. If folks
have different/better designs, I'm all ears. =]

I've included the first optimization based upon this: changing TLS
models to the *Exec models when PIE is enabled. This is the LLVM
component of PR12380 and is all of the hard work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154294 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-08 17:51:45 +00:00
Andrew Trick
8dd26253f5 RegAlloc superpass: includes phi elimination, coalescing, and scheduling.
Creates a configurable regalloc pipeline.

Ensure specific llc options do what they say and nothing more: -reglloc=... has no effect other than selecting the allocator pass itself. This patch introduces a new umbrella flag, "-optimize-regalloc", to enable/disable the optimizing regalloc "superpass". This allows for example testing coalscing and scheduling under -O0 or vice-versa.

When a CodeGen pass requires the MachineFunction to have a particular property, we need to explicitly define that property so it can be directly queried rather than naming a specific Pass. For example, to check for SSA, use MRI->isSSA, not addRequired<PHIElimination>.

CodeGen transformation passes are never "required" as an analysis

ProcessImplicitDefs does not require LiveVariables.

We have a plan to massively simplify some of the early passes within the regalloc superpass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150226 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-10 04:10:36 +00:00
Nick Lewycky
22de16dc75 Add a TargetOption for disabling tail calls.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148442 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-19 00:34:10 +00:00
David Blaikie
2bd335470f Remove unnecessary default cases in switches that cover all enum values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147855 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-10 16:47:17 +00:00
Dylan Noblesmith
9421406aad drop unneeded config.h includes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147197 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-22 23:04:07 +00:00
Daniel Dunbar
4ab406d7fc LLVMBuild: Remove trailing newline, which irked me.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146409 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12 19:48:00 +00:00
Nick Lewycky
8a8d479214 Move global variables in TargetMachine into new TargetOptions class. As an API
change, now you need a TargetOptions object to create a TargetMachine. Clang
patch to follow.

One small functionality change in PTX. PTX had commented out the machine
verifier parts in their copy of printAndVerify. That now calls the version in
LLVMTargetMachine. Users of PTX who need verification disabled should rely on
not passing the command-line flag to enable it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145714 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-02 22:16:29 +00:00
Evan Cheng
b95fc31aa2 Sink codegen optimization level into MCCodeGenInfo along side relocation model
and code model. This eliminates the need to pass OptLevel flag all over the
place and makes it possible for any codegen pass to use this information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144788 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-16 08:38:26 +00:00
Daniel Dunbar
0d3c223035 LLVMBuild: Add description files for the LLVM tools.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144417 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-11 22:59:39 +00:00
Sebastian Pop
0173864d8a rename getHostTriple into getDefaultTargetTriple
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143502 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-01 21:32:20 +00:00
Nick Lewycky
4e478fed1b Switch new .file directive emission off by default, change llc's flag for it to
-enable-dwarf-directory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143326 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-31 01:06:02 +00:00
Daniel Dunbar
8c39c9647d build: Tidy up a bunch of tool Makefiles, and simplify where possible using the
new all-targets pseudo-component.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142401 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-18 19:27:24 +00:00
Nick Lewycky
44d798d976 Add support for a new extension to the .file directive:
.file filenumber "directory" "filename"

This removes one join+split of the directory+filename in MC internals. Because
bitcode files have independent fields for directory and filenames in debug info,
this patch may change the .o files written by existing .bc files.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142300 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17 23:05:28 +00:00
Chris Lattner
d8b7aa2613 Enhance llvm::SourceMgr to support diagnostic ranges, the same way clang does. Enhance
the X86 asmparser to produce ranges in the one case that was annoying me, for example:

test.s:10:15: error: invalid operand for instruction
movl 0(%rax), 0(%edx)
              ^~~~~~~

It should be straight-forward to enhance filecheck, tblgen, and/or the .ll parser to use 
ranges where appropriate if someone is interested.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142106 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-16 04:47:35 +00:00
Evan Cheng
3e74d6fdd2 Move TargetRegistry and TargetSelect from Target to Support where they belong.
These are strictly utilities for registering targets and components.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138450 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-24 18:08:43 +00:00
Evan Cheng
e78085a3c0 Combine all MC initialization routines into one. e.g. InitializeX86MCAsmInfo,
InitializeX86MCInstrInfo, etc. are combined into InitializeX86TargetMC.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135812 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-22 21:58:54 +00:00
Chandler Carruth
4039313b4c Move the registered target printing in version strings completely out of
the Support library. Now its part of the TargetRegistry, and the three
commands that care about this explicitly register this extra bit of
version information.

The set of commands which care was computed by intersecting those which
use the Support library's version string printing and those that
initialize all the registered targets in a way that produces
a meaningful list. The only odd ball out is that 'clang -cc1as -version'
no longer prints the registered targets. I don't think anyone is really
interested in that (especially as the fact that llvm-mc does so is under
a FIXME), but if someone really does want this back I'll happily apply
the same patch there.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135757 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-22 07:50:48 +00:00
Evan Cheng
34ad6db8b9 - Move CodeModel from a TargetMachine global option to MCCodeGenInfo.
- Introduce JITDefault code model. This tells targets to set different default
  code model for JIT. This eliminates the ugly hack in TargetMachine where
  code model is changed after construction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135580 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-20 07:51:56 +00:00
Evan Cheng
439661395f Introduce MCCodeGenInfo, which keeps information that can affect codegen
(including compilation, assembly). Move relocation model Reloc::Model from
TargetMachine to MCCodeGenInfo so it's accessible even without TargetMachine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135468 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-19 06:37:02 +00:00
Evan Cheng
803fa2c605 LLC doesn't need to create MCInstrInfo's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135369 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18 04:16:27 +00:00
Evan Cheng
1abf2cb59b Rename createAsmInfo to createMCAsmInfo and move registration code to MCTargetDesc to prepare for next round of changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135219 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-14 23:50:31 +00:00
Evan Cheng
59ee62d241 - Eliminate MCCodeEmitter's dependency on TargetMachine. It now uses MCInstrInfo
and MCSubtargetInfo.
- Added methods to update subtarget features (used when targets automatically
  detect subtarget features or switch modes).
- Teach X86Subtarget to update MCSubtargetInfo features bits since the
  MCSubtargetInfo layer can be shared with other modules.
- These fixes .code 16 / .code 32 support since mode switch is updated in
  MCSubtargetInfo so MC code emitter can do the right thing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134884 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-11 03:57:24 +00:00
Evan Cheng
ffc0e73046 Change createAsmParser to take a MCSubtargetInfo instead of triple,
CPU, and feature string. Parsing some asm directives can change
subtarget state (e.g. .code 16) and it must be reflected in other
modules (e.g. MCCodeEmitter). That is, the MCSubtargetInfo instance
must be shared.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134795 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09 05:47:46 +00:00
Evan Cheng
276365dd4b Fix the ridiculous SubtargetFeatures API where it implicitly expects CPU name to
be the first encoded as the first feature. It then uses the CPU name to look up
features / scheduling itineray even though clients know full well the CPU name
being used to query these properties.

The fix is to just have the clients explictly pass the CPU name!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134127 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-30 01:53:36 +00:00
Evan Cheng
ab8be96fd3 Sink SubtargetFeature and TargetInstrItineraries (renamed MCInstrItineraries) into MC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134049 91177308-0d34-0410-b5e6-96231b3b80d8
2011-06-29 01:14:12 +00:00
Evan Cheng
4992b03cbd Remove dead option.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131947 91177308-0d34-0410-b5e6-96231b3b80d8
2011-05-24 01:43:38 +00:00
Rafael Espindola
f1a5c7ec04 Add all the plumbing needed for MC to expand cfi to the old tables in
the final assembly. It is the same technique used when targeting
assemblers that don't support .loc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130587 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-30 03:44:37 +00:00
Daniel Dunbar
0ccc0dde33 llc: Fix a refacto, .loc support didn't work before 10.6.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129841 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-20 00:47:19 +00:00
Daniel Dunbar
558692fd0a ADT/Triple: Renambe isOSX... methods to isMacOSX for consistency with the OS
triple component.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129838 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-20 00:14:25 +00:00
Daniel Dunbar
d285139e0e llc: Eliminate a use of getDarwinMajorNumber().
- As before, there is a minor semantic change here (evidenced by the test
   change) for Darwin triples that have no version component. I debated changing
   the default behavior of isOSVersionLT, but decided it made more sense for
   triples to be explicit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129805 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-19 20:46:13 +00:00
Andrew Trick
ce96902d88 Added *hidden* flags -print-options and -print-all-options so
developers can see if their driver changed any cl::Option's. The
current implementation isn't perfect but handles most kinds of
options. This is nice to have when decomposing the stages of
compilation and moving between different drivers. It's also a good
sanity check when comparing results produced by different command line
invocations that are expected to produce the comparable results.

Note: This is not an attempt to prolong the life of cl::Option. On the
contrary, it's a placeholder for a feature that must exist when
cl::Option is replaced by a more appropriate framework. A new
framework needs: a central option registry, dynamic name lookup,
non-global containers of option values (e.g. per-module,
per-function), *and* the ability to print options values and their defaults at
any point during compilation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128910 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-05 18:54:36 +00:00
Andrew Trick
a41af7aeef whitespace
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128905 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-05 18:41:31 +00:00
Devang Patel
9bc23ad614 Disable .loc support on older darwin OSes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120747 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-02 23:03:57 +00:00
Devang Patel
75a08e6aac Add hiddent command line option, as an debugging aid, to disable .loc use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120575 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-01 15:36:49 +00:00
Michael J. Spencer
1f6efa3996 Merge System into Support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-29 18:16:10 +00:00
Dan Gohman
e4f1a9b8a2 Move tool_output_file into its own file.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115973 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-07 20:32:40 +00:00
Michael J. Spencer
3a210e2d30 Revert "CMake: Get rid of LLVMLibDeps.cmake and export the libraries normally."
This reverts commit r113632

Conflicts:

	cmake/modules/AddLLVM.cmake

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113819 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-13 23:59:48 +00:00
Michael J. Spencer
4e9c939312 CMake: Get rid of LLVMLibDeps.cmake and export the libraries normally.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113632 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-10 21:14:25 +00:00
Dan Gohman
d4c454317a Make tool_output_file's raw_ostream instance a member variable instead
of a base class.

This makes it possible to unregister the file from FilesToRemove when
the file is done. Also, this eliminates the need for
formatted_tool_output_file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112706 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-01 14:20:41 +00:00
Dan Gohman
59279b1273 Fix llc to run the verifier once, not twice.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112532 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-30 21:41:20 +00:00
Duncan Sands
75ebbceeed Straighten out any triple strings passed on the command line before
they hit the rest of the system.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112344 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-28 01:30:02 +00:00
Dan Gohman
d5826a33a5 Use the new tool_output_file in several tools. This fixes a variety
of problems with output files being left behind or output streams
being left unclosed. Fix llvm-mc to respect the -o option in all
modes, rather than hardcoding outs() in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111603 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-20 01:07:01 +00:00