Store instructions do not modify register values and therefore it's safe
to form a store pair even if the source register has been read in between
the two store instructions.
Previously, the read of w1 (see below) prevented the formation of a stp.
str w0, [x2]
ldr w8, [x2, #8]
add w0, w8, w1
str w1, [x2, #4]
ret
We now generate the following code.
stp w0, w1, [x2]
ldr w8, [x2, #8]
add w0, w8, w1
ret
All correctness tests with -Ofast on A57 with Spec200x and EEMBC pass.
Performance results for SPEC2K were within noise.
llvm-svn: 239432
Based on feedback to r239428 by David Blaikie, use const_cast to reduce
duplication of the const and non-const versions of getNameEntryPtr.
Also have that method return the pointer to the name directly instead
of users having to then get the name from the union.
Finally, add a FIXME that we should use a static_assert once available in
the new operator.
llvm-svn: 239429
This should hopefully fix the 32-bit bots which were allocating space for a pointer
but needed to be aligned to 64-bits.
Now we allocate enough space for a uint64_t and a pointer and cast to the appropriate storage
llvm-svn: 239428
that was resetting it.
Remove the uses of DisableTailCalls in subclasses of TargetLowering and use
the value of function attribute "disable-tail-calls" instead. Also,
unconditionally add pass TailCallElim to the pipeline and check the function
attribute at the start of runOnFunction to disable the pass on a per-function
basis.
This is part of the work to remove TargetMachine::resetTargetOptions, and since
DisableTailCalls was the last non-fast-math option that was being reset in that
function, we should be able to remove the function entirely after the work to
propagate IR-level fast-math flags to DAG nodes is completed.
Out-of-tree users should remove the uses of DisableTailCalls and make changes
to attach attribute "disable-tail-calls"="true" or "false" to the functions in
the IR.
rdar://problem/13752163
Differential Revision: http://reviews.llvm.org/D10099
llvm-svn: 239427
This commit adds back the code that seems to have been dropped unintentionally
in r176985.
rdar://problem/13752163
Differential Revision: http://reviews.llvm.org/D10100
llvm-svn: 239426
Similarly to User which allocates a number of Use's prior to the this pointer,
allocate space for the Name* for MCSymbol only when we need a name.
Given that an MCSymbol is 48-bytes on 64-bit systems, this saves a decent % of space.
Given the verify_uselistorder test case with debug info and llc, 50k symbols have names
out of 700k so this optimises for the common case of temporary unnamed symbols.
Reviewed by David Blaikie.
llvm-svn: 239423
GCC mangles long double like __float128 in order to support
compatibility with ABI variants which had a different interpretation of
long double.
This fixes PR23791.
llvm-svn: 239421
Summary:
`IsRelativeToCurrentWorkingDirectory` was misleading, because relative paths
are sometimes appended to other directories, not just the cwd. Plus, the new
name is shorter. Also added `IsAbsolute` for completeness.
Reviewers: clayborg, ovyalov
Reviewed By: ovyalov
Subscribers: tberghammer, lldb-commits
Differential Revision: http://reviews.llvm.org/D10262
llvm-svn: 239419
array of bytes. The generation of this byte arrays was expecting
the host to be little endian, which prevents big endian hosts to be
used in the generation of the PTX code. This patch fixes the
problem by changing the way the bytes are extracted so that it
works for either little and big endian.
llvm-svn: 239412
This represents some of the functionality we expose in the llvmlite Python
binding.
Patch by Antoine Pitrou
Differential Revision: http://reviews.llvm.org/D10222
llvm-svn: 239411
make_error_code(object_error) is slow because object::object_category()
uses a ManagedStatic variable. But the real problem is that the function is
called too frequently. This patch uses std::error_code() instead of
object_error::success. In most cases, we return "success", so this patch
reduces number of function calls to that function.
http://reviews.llvm.org/D10333
llvm-svn: 239409
I have not succeeded in writing a proper test case for this yet and we
also need to solve the underlying fundamental problem of trying too
many combinations with nested blocks (basically this somewhat works
around our Dijkstra algorithm). Preventing this linebreak is good
anyways as usually the penalties never make us choose it (that's why I
can't create a test) and it also looks ugly.
Also cleaned up state comparison code that I discovered while hunting
this down.
llvm-svn: 239398
Summary:
For some branches, GAS accepts an immediate instead of the 2nd register operand.
We only implement this for BNE and BEQ for now. Other branch instructions can be added later, if needed.
Reviewers: dsanders
Reviewed By: dsanders
Subscribers: seanbruno, emaste, llvm-commits
Differential Revision: http://reviews.llvm.org/D9666
llvm-svn: 239396
This matches the cl.exe behavior (tested with 18.00.31101). In order to
specify an output file for /P, use the /Fi option instead.
Differential Revision: http://reviews.llvm.org/D10313
llvm-svn: 239393
Summary:
If malloc/realloc fails then the SmallVector becomes unusable since begin() and
end() will return NULL. This is unlikely to occur but was the cause of recent
bugpoint test failures on my machine.
It is not clear whether not checking for malloc/realloc failure is a deliberate
decision and adding checks has the potential to impact compiler performance.
Therefore, this patch only adds the check to builds with assertions enabled for
the moment.
Reviewers: bkramer
Reviewed By: bkramer
Subscribers: bkramer, llvm-commits
Differential Revision: http://reviews.llvm.org/D9520
llvm-svn: 239392
The object file format is sometimes overridden for MSVC targets to use
ELF instead of COFF. Make sure we preserve this choice when setting the
msvc version number in the triple.
llvm-svn: 239388
The code generator may create references to runtime library symbols such as
__chkstk which were not visible via LTOModule. Handle these cases by loading
the object file from the library, but abort if we end up having loaded any
bitcode objects.
Because loading the object file may have introduced new undefined references,
call reportRemainingUndefines again to detect and report them.
Differential Revision: http://reviews.llvm.org/D10332
llvm-svn: 239386
The LLVM code generator can sometimes synthesize symbols, such as SSE
constants, that are not visible via the LTOModule interface. Allow such
symbols so long as they have definitions.
Differential Revision: http://reviews.llvm.org/D10331
llvm-svn: 239385
Chad Rosier