Commit Graph

33 Commits

Author SHA1 Message Date
Stephen Lin
3484da9479 Only pass 'returned' to target-specific lowering code when the value of entire register is guaranteed to be preserved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180825 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-30 22:49:28 +00:00
Stephen Lin
13aba14eb5 Add some constraints to use of 'returned':
1) Disallow 'returned' on parameter that is also 'sret' (no sensible semantics, as far as I can tell).
2) Conservatively disallow tail calls through 'returned' parameters that also are 'zext' or 'sext' (for consistency with treatment of other zero-extending and sign-extending operations in tail call position detection...can be revised later to handle situations that can be determined to be safe).

This is a new attribute that is not yet used, so there is no impact.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180118 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-23 16:31:56 +00:00
Stephen Lin
456ca048af Add CodeGen support for functions that always return arguments via a new 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).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179925 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-20 05:14:40 +00:00
Stephen Lin
5c34e08b9f Allow tail call opportunity detection through nested and/or multiple iterations of extractelement/insertelement indirection
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179924 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-20 04:27:51 +00:00
Bill Wendling
69d37fa635 Remove unused #includes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176467 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-05 01:00:45 +00:00
Bill Wendling
1a17bd21ff Remove unused parameter. Also use the AttributeSet query methods instead of the Attribute query methods.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172852 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-18 21:50:24 +00:00
Chandler Carruth
40b2c32475 Sink a function that refers to the SelectionDAG into that library in the
one file where it is called as a static function. Nuke the declaration
and the definition in lib/CodeGen, along with the include of
SelectionDAG.h from this file.

There is no dependency edge from lib/CodeGen to
lib/CodeGen/SelectionDAG, so it isn't valid for a routine in lib/CodeGen
to reference the DAG. There is a dependency from
lib/CodeGen/SelectionDAG on lib/CodeGen. This breaks one violation of
this layering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171842 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-08 05:11:57 +00:00
Chandler Carruth
0b8c9a80f2 Move all of the header files which are involved in modelling the LLVM IR
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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-02 11:36:10 +00:00
Bill Wendling
034b94b170 Rename the 'Attributes' class to 'Attribute'. It's going to represent a single attribute in the future.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170502 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19 07:18:57 +00:00
Chandler Carruth
d04a8d4b33 Use the new script to sort the includes of every file under lib.
Sooooo many of these had incorrect or strange main module includes.
I have manually inspected all of these, and fixed the main module
include to be the nearest plausible thing I could find. If you own or
care about any of these source files, I encourage you to take some time
and check that these edits were sensible. I can't have broken anything
(I strictly added headers, and reordered them, never removed), but they
may not be the headers you'd really like to identify as containing the
API being implemented.

Many forward declarations and missing includes were added to a header
files to allow them to parse cleanly when included first. The main
module rule does in fact have its merits. =]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03 16:50:05 +00:00
Bill Wendling
702cc91aa1 Move the Attributes::Builder outside of the Attributes class and into its own class named AttrBuilder. No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165960 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-15 20:35:56 +00:00
Bill Wendling
3756e70af6 Remove the bitwise XOR operator from the Attributes class. Replace it with the equivalent from the builder class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165893 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-14 06:56:13 +00:00
Bill Wendling
7d2f2496c1 Remove the final bits of Attributes being declared in the Attribute
namespace. Use the attribute's enum value instead. No functionality change
intended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165610 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-10 07:36:45 +00:00
Bill Wendling
6765834754 Create enums for the different attributes.
We use the enums to query whether an Attributes object has that attribute. The
opaque layer is responsible for knowing where that specific attribute is stored.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165488 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-09 07:45:08 +00:00
Micah Villmow
3574eca1b0 Move TargetData to DataLayout.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165402 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-08 16:38:25 +00:00
Bill Wendling
e603fe4664 Convert some attribute existence queries over to use the predicate methods.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164268 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-19 23:54:18 +00:00
Chris Lattner
74ee0ef6a7 quick fix for PR13006, will check in testcase later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157813 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 15:02:52 +00:00
Chris Lattner
f59e4e3452 enhance the logic for looking through tailcalls to look through transparent casts
in multiple-return value scenarios, like what happens on X86-64 when returning
small structs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157800 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 05:29:15 +00:00
Chris Lattner
5b0d946537 enhance getNoopInput to know about vector<->vector bitcasts of legal
types, as well as int<->ptr casts.  This allows us to tailcall functions
with some trivial casts between the call and return (i.e. because the
return types disagree).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157798 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 05:16:33 +00:00
Chris Lattner
cd6015cc8a rearrange some logic, no functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157796 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-01 05:01:15 +00:00
Evan Cheng
bf010eb911 Fix a long standing tail call optimization bug. When a libcall is emitted
legalizer always use the DAG entry node. This is wrong when the libcall is
emitted as a tail call since it effectively folds the return node. If
the return node's input chain is not the entry (i.e. call, load, or store)
use that as the tail call input chain.

PR12419
rdar://9770785
rdar://11195178


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154370 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-10 01:51:00 +00:00
David Blaikie
4d6ccb5f68 More dead code removal (using -Wunreachable-code)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148578 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-20 21:51:11 +00:00
Kostya Serebryany
164b86b439 Extend Attributes to 64 bits
Problem: LLVM needs more function attributes than currently available (32 bits).
One such proposed attribute is "address_safety", which shows that a function is being checked for address safety (by AddressSanitizer, SAFECode, etc).

Solution:
- extend the Attributes from 32 bits to 64-bits
- wrap the object into a class so that unsigned is never erroneously used instead
- change "unsigned" to "Attributes" throughout the code, including one place in clang.
- the class has no "operator uint64 ()", but it has "uint64_t Raw() " to support packing/unpacking.
- the class has "safe operator bool()" to support the common idiom:  if (Attributes attr = getAttrs()) useAttrs(attr);
- The CTOR from uint64_t is marked explicit, so I had to add a few explicit CTOR calls
- Add the new attribute "address_safety". Doing it in the same commit to check that attributes beyond first 32 bits actually work.
- Some of the functions from the Attribute namespace are worth moving inside the class, but I'd prefer to have it as a separate commit.

Tested:
"make check" on Linux (32-bit and 64-bit) and Mac (10.6)
built/run spec CPU 2006 on Linux with clang -O2.


This change will break clang build in lib/CodeGen/CGCall.cpp.
The following patch will fix it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148553 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-20 17:56:17 +00:00
Dan Gohman
f042660197 Move Instruction::isSafeToSpeculativelyExecute out of VMCore and
into Analysis as a standalone function, since there's no need for
it to be in VMCore. Also, update it to use isKnownNonZero and
other goodies available in Analysis, making it more precise,
enabling more aggressive optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146610 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-14 23:49:11 +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
Chris Lattner
db125cfaf5 land David Blaikie's patch to de-constify Type, with a few tweaks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135375 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-18 04:54:35 +00:00
Evan Cheng
9344f97108 Minor code re-structuring.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127952 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-19 17:03:16 +00:00
Evan Cheng
3d2125c9db Enable sibling call optimization of libcalls which are expanded during
legalization time. Since at legalization time there is no mapping from
SDNode back to the corresponding LLVM instruction and the return
SDNode is target specific, this requires a target hook to check for
eligibility. Only x86 and ARM support this form of sibcall optimization
right now.
rdar://8707777


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120501 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30 23:55:39 +00:00
John Thompson
44ab89eb37 Inline asm multiple alternative constraints development phase 2 - improved basic logic, added initial platform support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117667 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-29 17:29:13 +00:00
Dan Gohman
0dadb15927 ComputeLinearIndex doesn't need its TLI argument.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115792 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-06 16:18:29 +00:00
Bill Wendling
23295cc1dd Using llvm.eh.catch.all.value instead of .llvm.eh.catch.all.value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109462 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-26 22:36:52 +00:00
Evan Cheng
60108e96bb Split -enable-finite-only-fp-math to two options:
-enable-no-nans-fp-math and -enable-no-infs-fp-math. All of the current codegen fp math optimizations only care whether the fp arithmetics arguments and results can never be NaN.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108465 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-15 22:07:12 +00:00
Dan Gohman
5eb6d65a27 Move several SelectionDAG-independent utility functions out of the
SelectionDAG directory and into a new Analysis.cpp file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101975 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21 01:22:34 +00:00