Currently SI_IF results in a s_and_saveexec_b64 followed by s_xor_b64.
The xor is used to extract only the changed bits. In case of a simple
if region where the only use of that value is in the SI_END_CF to
restore the old exec mask, we can omit the xor and perform an or of
the exec mask with the original exec value saved by the
s_and_saveexec_b64.
Differential Revision: https://reviews.llvm.org/D35861
llvm-svn: 309185
Summary:
This changes SimplifyLibCalls to use the new OptimizationRemarkEmitter
API.
In fact, as SimplifyLibCalls is only ever called via InstCombine,
(as far as I can tell) the OptimizationRemarkEmitter is added there,
and then passed through to SimplifyLibCalls later.
I have avoided changing any remark text.
This closes PR33787
Patch by Sam Elliott!
Reviewers: anemet, davide
Reviewed By: anemet
Subscribers: davide, mehdi_amini, eraman, fhahn, llvm-commits
Differential Revision: https://reviews.llvm.org/D35608
llvm-svn: 309158
This is a better fix than r308708 for the problem introduced in
r304020. It restores the skeleton CU testcases modified by that commit
to their original form and most importantly ensures that
frontend-generated skeleton CUs (such as used to point to Clang
modules) come after the regular CUs. This broke for DICompileUnit
nodes that don't have any immediate children because they are now
constructed lazily instead of the order in which they are listed in
!llvm.dbg.cu. After this commit we still don't guarantee that order,
but we do guarantee that empty skeletons come last.
Shipping versions of LLDB are very sensitive to the ordering of
CUs. I'll track a fix for LLDB to be more permissive separately.
This fixes a test failure in the LLDB testsuite.
rdar://problem/33357252
llvm-svn: 309154
Summary:
This patch moves root-finding logic from DominatorTreeBase to GenericDomTreeConstruction.h.
It makes the behavior simpler and more consistent by always adding a virtual root to PostDominatorTrees.
Reviewers: dberlin, davide, grosser, sanjoy
Reviewed By: dberlin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35597
llvm-svn: 309146
Summary:
This silences a couple of implicit fallthrough warnings with GCC 7.1 in
this file.
Reviewers: colinl, kparzysz
Reviewed By: kparzysz
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35889
llvm-svn: 309129
Summary: The new PM needs to invoke add-discriminator pass when building with -fdebug-info-for-profiling.
Reviewers: chandlerc, davidxl
Reviewed By: chandlerc
Subscribers: sanjoy, llvm-commits
Differential Revision: https://reviews.llvm.org/D35744
llvm-svn: 309121
Summary:
`clang --autocomplete=-std` will show
```
-std: Language standard to compile for
-std= Language standard to compile for
-stdlib= C++ standard library to use
```
after this change.
However, showing HelpText with completion in bash seems super tricky, so
this feature will be used in other shells (fish, zsh...).
Reviewers: v.g.vassilev, teemperor, ruiu
Subscribers: cfe-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D35759
llvm-svn: 309113
In COFF, a symbol offset can't be stored in the relocation (as is
done in ELF or MachO), but is stored as the immediate in the
instruction itself. The immediate in the ADRP thus is the symbol
offset in bytes, not in pages. For the PAGEOFFSET_12A/L relocations,
ignore any offset outside of the lowest 12 bits; they won't have any
effect on the ADD/LDR/STR instruction itself but only on the associated
ADRP.
This is similar to how the same issue is handled for MOVW/MOVT
instructions in ELF (see e.g. SVN r307713, and r307728 in lld).
This fixes "fixup out of range" errors while building larger object
files, where temporary symbols end up as a plain section symbol and
an offset, and fixes any cases where the symbol offset mean that
the actual target ended up on a different page than the symbol
itself.
Differential Revision: https://reviews.llvm.org/D35791
llvm-svn: 309105
By default, we display only options that are not
hidden and have help texts. This patch adds flag
allowing to display aliases that have no help text.
In this case help text of aliased option used instead.
Differential revision: https://reviews.llvm.org/D35476
llvm-svn: 309087
This patch expands the support of lowerInterleavedStore to 32x8i stride 4.
LLVM creates suboptimal shuffle code-gen for AVX2. In overall, this patch is a specific fix for the pattern (Strid=4 VF=32) and we plan to include more patterns in the future. To reach our goal of "more patterns". We include two mask creators. The first function creates shuffle's mask equivalent to unpacklo/unpackhi instructions. The other creator creates mask equivalent to a concat of two half vectors(high/low).
The patch goal is to optimize the following sequence:
At the end of the computation, we have ymm2, ymm0, ymm12 and ymm3 holding
each 32 chars:
c0, c1, , c31
m0, m1, , m31
y0, y1, , y31
k0, k1, ., k31
And these need to be transposed/interleaved and stored like so:
c0 m0 y0 k0 c1 m1 y1 k1 c2 m2 y2 k2 c3 m3 y3 k3 ....
Reviewers:
dorit
Farhana
RKSimon
guyblank
DavidKreitzer
Differential Revision: https://reviews.llvm.org/D34601
llvm-svn: 309086
Changing mask argument type from const SmallVectorImpl<int>& to
ArrayRef<int>.
This came up in D35700 where a mask is received as an ArrayRef<int> and
we want to pass it to TargetLowering::isShuffleMaskLegal().
Also saves a few lines of code.
llvm-svn: 309085
splitting patch D34601 into two part. This part changes the location of two functions.
The second part will be based on that patch. This was requested by @RKSimon.
Reviewers:
1. dorit
2. Farhana
3. RKSimon
4. guyblank
5. DavidKreitzer
llvm-svn: 309084
This patch adds a cache for computeExitLimit to save compilation time. A lot of examples of
tests that take extensive time to compile are attached to the bug 33494.
Differential Revision: https://reviews.llvm.org/D35827
llvm-svn: 309080
Summary: The aligned load predicates don't suppress themselves if the load is non-temporal the way the unaligned predicates do. For the most part this isn't a problem because the aligned predicates are mostly used for instructions that only load the the non-temporal loads have priority over those. The exception are masked loads.
Reviewers: RKSimon, zvi
Reviewed By: RKSimon
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35712
llvm-svn: 309079
`SCEVUnknown::allUsesReplacedWith` does not need to call `forgetMemoizedResults`
since RAUW does a value-equivalent replacement by assumption. If this
assumption was false then the later setValPtr(New) call would be incorrect too.
This is a non-trivial performance optimization for functions with a large number
of loops since `forgetMemoizedResults` walks all loop backedge taken counts to
see if any of them use the SCEVUnknown being RAUWed. However, this improvement
is difficult to demonstrate without checking in an excessively large IR file.
llvm-svn: 309072
Summary:
Previously were in support. Since many many things depend on support,
were all forced to also depend on libxml2, which we only want in a few cases.
This puts all the libxml2 deps in a separate lib to be used only in a few
places.
Reviewers: ruiu, thakis, rnk
Subscribers: mgorny, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D35819
llvm-svn: 309070
The PDB "symbol stream" actually contains symbol records for the publics
and the globals stream. The globals and publics streams are essentially
hash tables that point into a single stream of records. In order to
match cvdump's behavior, we need to only dump symbol records referenced
from the hash table. This patch implements that, and then implements
global stream dumping, since it's just a subset of public stream
dumping.
Now we shouldn't see S_PROCREF or S_GDATA32 records when dumping
publics, and instead we should see those record in the globals stream.
llvm-svn: 309066
This is a workaround for the bug described in PR31652 and
http://lists.llvm.org/pipermail/llvm-dev/2017-July/115497.html. The temporary
solution is to add a function EqualityPropUnSafe. In EqualityPropUnSafe, for
some simple patterns we can know the equality comparison may contains undef,
so we regard such comparison as unsafe and will not do loop-unswitching for
them. We also need to disable the select simplification when one of select
operand is undef and its result feeds into equality comparison.
The patch cannot clear the safety issue caused by the bug, but it can suppress
the issue from happening to some extent.
Differential Revision: https://reviews.llvm.org/D35811
llvm-svn: 309059
Summary:
Does a simple merge, where mergeable elements are combined, all others
are appended. Does not apply trickly namespace rules.
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D35753
llvm-svn: 309047
Summary:
ELF linkers generate __start_<secname> and __stop_<secname> symbols
when there is a value in a section <secname> where the name is a valid
C identifier. If dead stripping determines that the values declared
in section <secname> are dead, and we then internalize (and delete)
such a symbol, programs that reference the corresponding start and end
section symbols will get undefined reference linking errors.
To fix this, add the section name to the IRSymtab entry when a symbol is
defined in a specific section. Then use this in the gold-plugin to mark
the symbol as external and visible from outside the summary when the
section name is a valid C identifier.
Reviewers: pcc
Subscribers: mehdi_amini, inglorion, eraman, llvm-commits
Differential Revision: https://reviews.llvm.org/D35639
llvm-svn: 309009
Eugene Zelenko