MOV is almost always the right thing to print if possile. People understand it.
This will be tested when the TableGen "should I print this Alias" heuristic is
fixed (very soon).
llvm-svn: 208958
For example, the full instruction "sub w0, wzr, w1, uxtw" could print as either
"neg w0, w1" or "sub w0, wzr, w1". The former is better.
This will be tested when the TableGen "should I print this Alias" heuristic is
fixed (very soon).
llvm-svn: 208957
You can write "lslv w0, w1, w2" (probably for legacy reasons), but it should be
printed as simply "lsl".
This will be tested when the TableGen "should I print this Alias" heuristic is
fixed (very soon).
llvm-svn: 208956
Add some Windows on ARM specific library calls. These are provided by msvcrt,
and can be used to perform integer to floating-point conversions (and
vice-versa) mirroring similar functions in the RTABI.
llvm-svn: 208949
Sometimes a LLVM compilation may take more time then a client would like to
wait for. The problem is that it is not possible to safely suspend the LLVM
thread from the outside. When the timing is bad it might be possible that the
LLVM thread holds a global mutex and this would block any progress in any other
thread.
This commit adds a new yield callback function that can be registered with a
context. LLVM will try to yield by calling this callback function, but there is
no guaranteed frequency. LLVM will only do so if it can guarantee that
suspending the thread won't block any forward progress in other LLVM contexts
in the same process.
Once the client receives the call back it can suspend the thread safely and
resume it at another time.
Related to <rdar://problem/16728690>
llvm-svn: 208945
Allow multiple raw profiles to coexist in a single .profraw file,
given the following conditions:
- Zero padding at the end of or between profiles will be skipped.
- Each profile must start with a valid header.
- Mixing endianness or pointer sizes in concatenated profiles files is
not allowed.
This is needed to handle cases where a program's shared libraries are
profiled as well as the main executable itself, as we'll need to emit
each executable's counters. Combining the tables in the runtime would
be expensive for the instrumented program.
rdar://16918688
llvm-svn: 208938
This commit implements two command line switches -global-merge-on-external
and -global-merge-aligned, and both of them are false by default, so this
optimization is disabled by default for all targets.
For ARM64, some back-end behaviors need to be tuned to get this optimization
further enabled.
llvm-svn: 208934
Since type units in the dwo file are handled by a debug aware tool, they
don't need to leverage the ELF comdat grouping to implement
deduplication. Avoid creating all the .group sections for these as a
space optimization.
llvm-svn: 208930
It is more appropriate than the current situation, when one flag
(AbsoluteFilePath) is relevant only if another flag is set.
This refactoring would also simplify fetching the short function name
(stored in DW_AT_name) instead of a linkage name returned currently.
No functionality change.
llvm-svn: 208921
The allocas going out of scope are immediately killed by the return
instruction.
This is a resend of r208912, which was committed accidentally.
Reviewers: chandlerc
Differential Revision: http://reviews.llvm.org/D3792
llvm-svn: 208920
We have to iterate over all the calls that were inlined to find out if
any were musttail.
Sink another variable down to where its used.
llvm-svn: 208913
The allocas going out of scope are immediately killed by the return
instruction.
Reviewers: chandlerc
Differential Revision: http://reviews.llvm.org/D3630
llvm-svn: 208912
The interesting case is what happens when you inline a musttail call
through a musttail call site. In this case, we can't break perfect
forwarding or allow any stack growth.
Instead of merging control flow from the inlined return instruction
after a musttail call into the body of the caller, leave the inlined
return instruction in the caller so that the musttail call stays in the
tail position.
More work is required in http://reviews.llvm.org/D3630 to handle the
case where the inlined function has dynamic allocas or byval arguments.
Reviewers: chandlerc
Differential Revision: http://reviews.llvm.org/D3491
llvm-svn: 208910
The symlink needs to point to a relative path, so we don't break
building in a chroot.
Tested-by: Laurent Carlier <lordheavym@gmail.org>
llvm-svn: 208908
Added target specific combine rules to fold blend intrinsics according
to the following rules:
1) fold(blend A, A, Mask) -> A;
2) fold(blend A, B, <allZeros>) -> A;
3) fold(blend A, B, <allOnes>) -> B.
Added two new tests to verify that the new folding rules work for all
the optimized blend intrinsics.
llvm-svn: 208895
We now use SReg_* for integer types and VReg_* for floating-point types.
This should help simplify the SIFixSGPRCopies pass and no longer causes
ISel to insert a COPY after termiator instuctions that output a value.
This change is covered by exisitng tests.
llvm-svn: 208888
Previously, TableGen assumed that every aliased operand consumed precisely 1
MachineInstr slot (this was reasonable because until a couple of days ago,
nothing more complicated was eligible for printing).
This allows a couple more ARM64 aliases to print so we can remove the special
code.
On the X86 side, I've gone for explicit AT&T size specifiers as the default, so
turned off a few of the aliases that would have just started printing.
llvm-svn: 208880
In all cases, if a "mov" alias exists, it is the canonical form of the
instruction. Now that TableGen can support aliases containing syntax variants,
we can enable them and improve the quality of the asm output.
llvm-svn: 208874
Previously, we ignored the difference between V64 and V128 when parsing
assembly: they both got mapped to registers in the FPR128 class. This is
basically harmless at the moment because they both print and encode the same
way. However, it will affect the printing of aliases.
llvm-svn: 208866
