r267296 used std::piecewise_construct without using
std::forward_as_tuple, and r267298 hacked it out (using an emplace_back
followed by a couple of reset() calls) because of a problem on a bot.
I'm finally circling back to call forward_as_tuple as I should have to
begin with (thanks to David Blaikie for pointing out the missing piece).
Note that this code uses emplace_back() instead of
push_back(make_pair()) because the move constructor for TrackingMDRef is
expensive (cheaper than a copy, but still expensive).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272306 91177308-0d34-0410-b5e6-96231b3b80d8
512-bit VPSLLDQ/VPSRLDQ can only be used for avx512bw targets so lowerVectorShuffleAsShift had to be adjusted to include the subtarget
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272300 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Currently clang emits these instructions via inline (volatile) asm in
the CUDA headers. Switching to intrinsics will let the optimizer reason
across calls to these intrinsics.
Reviewers: tra
Subscribers: llvm-commits, jholewinski
Differential Revision: http://reviews.llvm.org/D21160
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272298 91177308-0d34-0410-b5e6-96231b3b80d8
- Alphabetically sort the initializeXXX calls (this was brought up in
D21115)
- Remove repeated function names from doxygen comments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272297 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
__syncthreads, which corresponds to bar.sync 0, is already convergent.
This makes the more general bar.sync n likewise convergent.
Reviewers: tra
Subscribers: llvm-commits, jholewinski
Differential Revision: http://reviews.llvm.org/D21161
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272295 91177308-0d34-0410-b5e6-96231b3b80d8
Use os.devnull instead of tempfiles when substituting '/dev/null' on
Windows machines. This should make the bots just a bit speedier.
Thanks to Yunzhong Gao for testing this patch on Windows!
Differential Revision: http://reviews.llvm.org/D20549
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272290 91177308-0d34-0410-b5e6-96231b3b80d8
Previously, we materialized secondary vector IVs from the primary scalar IV,
by offseting the primary to match the correct start value, and then broadcasting
it - inside the loop body. Instead, we can use a real vector IV, like we do for
the primary.
This enables using vector IVs for secondary integer IVs whose type matches the
type of the primary.
Differential Revision: http://reviews.llvm.org/D20932
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272283 91177308-0d34-0410-b5e6-96231b3b80d8
This is the more-correct fix to out-of-tree building. AddLLVM.cmake relies on this variable being set, so we should make sure it is set in LLVMConfig.cmake.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272279 91177308-0d34-0410-b5e6-96231b3b80d8
This reapplies commit r271930, r271915, r271923. They hit a bug in
Thumb which is fixed in r272258 now.
The original message:
The code layout that TailMerging (inside BranchFolding) works on is not the
final layout optimized based on the branch probability. Generally, after
BlockPlacement, many new merging opportunities emerge.
This patch calls Tail Merging after MBP and calls MBP again if Tail Merging
merges anything.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272267 91177308-0d34-0410-b5e6-96231b3b80d8
This enables use of the 'S' constraint for inline ASM operands on
SystemZ, which allows for a memory reference with a signed 20-bit
immediate displacement. This patch includes corresponding documentation
and test case updates.
I've changed the 'T' constraint to match the new behavior for 'S', as
'T' also uses a long displacement (though index constraints are still
not implemented). I also changed 'm' to match the behavior for 'S' as
this will allow for a wider range of displacements for 'm', though
correct me if that's not the right decision.
Author: colpell
Differential Revision: http://reviews.llvm.org/D21097
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272266 91177308-0d34-0410-b5e6-96231b3b80d8
ReplaceTailWithBranchTo assumed that if an instruction is predicated, it must be part of an IT block. This is not correct for conditional branches.
No testcase as this was triggered by the reverted patch r272017 - test coverage will occur when that patch is re-reverted and there is no known way to trigger this in the meantime.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272258 91177308-0d34-0410-b5e6-96231b3b80d8
This is made possible by removing an assert in llc that assumed
MIRParser::parseLLVMModule would exit on error. MIRParser's documentation states
that it returns null if a parsing error occurs, so there's no reason to assert.
We can instead just fall through to where the check for a module is performed
and exit if it is null.
This commit is part of the clean-up after r269655.
Fixes PR27770
Differential Revision: http://reviews.llvm.org/D20371
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272254 91177308-0d34-0410-b5e6-96231b3b80d8
If an immediate is only used in an AND node, it is possible that the immediate can be more optimally materialized when negated. If this is the case, we can negate the immediate and use a BIC instead;
int i(int a) {
return a & 0xfffffeec;
}
Used to produce:
ldr r1, [CONSTPOOL]
ands r0, r1
CONSTPOOL: 0xfffffeec
And now produces:
movs r1, #255
adds r1, #20 ; Less costly immediate generation
bics r0, r1
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272251 91177308-0d34-0410-b5e6-96231b3b80d8
Add support to the AArch64 IAS for the `.arch` directive. This allows the
assembly input to use architectural functionality in part of a file. This is
used in existing code like BoringSSL.
Resolves PR26016!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272241 91177308-0d34-0410-b5e6-96231b3b80d8
We can safely rely on a NoWrap add recurrence causing UB down the road
only if we know the loop does not have a exit expressed in a way that is
opaque to ScalarEvolution (e.g. by a function call that conditionally
calls exit(0)).
I believe with this change PR28012 is fixed.
Note: I had to change some llvm-lit tests in LoopReroll, since it looks
like they were depending on this incorrect behavior.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272237 91177308-0d34-0410-b5e6-96231b3b80d8
looking for it along $PATH. This allows installs of LLVM tools outside of
$PATH to find the symbolizer and produce pretty backtraces if they crash.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272232 91177308-0d34-0410-b5e6-96231b3b80d8
TPI hash table contains a parallel array for the type records.
For each type record R, a hash value is calculated by `H(R) % NumBuckets`
where H is a hash function, and the result is stored to a bucket element.
H is TPI1::hashPrec function in microsoft-pdb repository.
Our hash function does not support all type record types yet.
Currently it supports only records for line number.
I'll extend it in a follow up patch.
The aim of verify the hash table is not only detect corrupted files.
It ensures that our understanding of how the hash values are calculated
is correct.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272229 91177308-0d34-0410-b5e6-96231b3b80d8
Without that check it was possible to write test cases where the size
was not specified and we ended up with weird asserts down the road,
because the default value (1) would not make sense.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272226 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This fixes PR26682. Also add LCSSA as a preserved pass to LoopSimplify,
that looks correct to me and allows to write a test for the issue.
Reviewers: chandlerc, bogner, sanjoy
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D21112
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272224 91177308-0d34-0410-b5e6-96231b3b80d8
