There's probably some vector-with-undef-element pattern
that shows an improvement, so this is probably not quite
'NFC'.
This is the last step towards removing the fake binop
queries for not/neg. Ie, there are no more uses of those
functions in trunk. Fneg should follow.
llvm-svn: 345050
Summary:
TryToShrinkGlobalToBoolean, when possible, will split store <value> + load <value> into store <bool> + select <bool ? value : 0>. This preserves DebugLoc during that pass.
Fixes PR37959. The test case here is the simplified .ll for:
```
static int foo;
int bar() {
foo = 5;
return foo;
}
```
Reviewers: dblaikie, gbedwell, aprantl
Reviewed By: dblaikie
Subscribers: mehdi_amini, JDevlieghere, dexonsmith, llvm-commits
Tags: #debug-info
Differential Revision: https://reviews.llvm.org/D53531
llvm-svn: 345046
Vector types are not possible here because this code explicitly
checks for a scalar type, but this is another step towards
completely removing the fake binop queries for not/neg/fneg.
llvm-svn: 345043
We need to update this code before introducing an 'fneg' instruction in IR,
so we might as well kill off the integer neg/not queries too.
This is no-functional-change-intended for scalar code and most vector code.
For vectors, we can see that the 'match' API allows for undef elements in
constants, so we optimize those cases better.
Ideally, there would be a test for each code diff, but I don't see evidence
of that for the existing code, so I didn't try very hard to come up with new
vector tests for each code change.
Differential Revision: https://reviews.llvm.org/D53533
llvm-svn: 345042
Vector types are not possible here because this code only starts
matching from the scalar bool value of a conditional branch, but
this is another step towards completely removing the fake binop
queries for not/neg/fneg.
llvm-svn: 345041
As suggested on D53258, this patch demonstrates sharing common CTTZ expansion code between VectorLegalizer and SelectionDAGLegalize by putting it in TargetLowering.
I intend to move CTLZ and (scalar) CTPOP over as well and then update D53258 accordingly.
Differential Revision: https://reviews.llvm.org/D53474
llvm-svn: 345039
Expand arithmetic reduction to include mul/and/or/xor instructions.
This patch just fixes the SLPVectorizer - the effective reduction costs for AVX1+ are still poor (see rL344846) and will need to be improved before SLP sees this as a valid transform - but we can already see the effect on SSE2 tests.
This partially helps PR37731, but doesn't fix it all as it still falls over on the extraction/reduction order for some reason.
Differential Revision: https://reviews.llvm.org/D53473
llvm-svn: 345037
The transform is broken in 2 ways - it doesn't correct metadata (or even drop it),
and it doesn't work with vectors with undef elements.
llvm-svn: 345033
This pass could probably be modified slightly to allow
vector splat transforms for practically no cost, but
it only works on scalars for now. So the use of the
newer 'match' API should make no functional difference.
llvm-svn: 345030
This initially landed in rL345014, but was reverted in rL345017
due to sanitizer-x86_64-linux-fast buildbot failure in
check-lld (ELF/relocatable-versioned.s) test.
While i'm not yet quite sure what is the problem, one obvious
thing here is that extra truncation roundtrip.
Maybe that's it? If not, will re-revert.
Differential Revision: https://reviews.llvm.org/D53521
llvm-svn: 345027
Some versions of bash.exe, for example WSL's version expect paths in the form
/mnt/c/path/to/dir rather than c:\\path\\to\\dir so will cause failures
for any tests that require an external shell if used by lit. If we're on
Windows and looking for an external shell, check that the found version
of bash is able to parse a native path before returning that version.
This patch also partially reverts the behaviour of r228221 by
restoring the warning if bash cannot be found. This shouldn't pollute
the lit stderr anymore as we're now using internal shell by default on
Windows. If someone is explicitly specifying to use an external shell, it's
probably worth alerting them to the fact that bash could not be found.
Differential Revision: https://reviews.llvm.org/D52831
llvm-svn: 345019
Matches the approach taken in the constant pool shuffle decoders, and uses an UndefElts mask instead of uint64_t(-1) raw mask values, which doesn't work safely for i32/i64 shuffle mask sizes (as the -1 value is legal).
This allows us to remove the constant pool shuffle decoders from most of the getTargetShuffleMask variable shuffle cases (X86ISD::VPERMV3 will be handled in a future commit).
llvm-svn: 345018
Summary:
Continuation of D52348.
We also get the `c) x & (-1 >> (32 - y))` pattern here, because of the D48768.
I will add extra-uses into those tests and follow-up with a patch to handle those patterns too.
Reviewers: RKSimon, craig.topper
Reviewed By: craig.topper
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D53521
llvm-svn: 345014
Split MachinePipeliner code into header and cpp files to allow inheritance from SwingSchedulerDAG
Differential Revision: https://reviews.llvm.org/D53477
llvm-svn: 345008
Non-loaded sections (whose unused load-address defaults to zero) should not
be taken into account when calculating ImageBase, or ImageBase will be
incorrectly set to 0.
Patch by Andrew Scheidecker. Thanks Andrew!
https://reviews.llvm.org/D51343
+ // The Sections list may contain sections that weren't loaded for
+ // whatever reason: they may be debug sections, and ProcessAllSections
+ // is false, or they may be sections that contain 0 bytes. If the
+ // section isn't loaded, the load address will be 0, and it should not
+ // be included in the ImageBase calculation.
llvm-svn: 344995
Summary:
At compile-time, create an array of {PC,HumanReadableStackFrameDescription}
for every function that has an instrumented frame, and pass this array
to the run-time at the module-init time.
Similar to how we handle pc-table in SanitizerCoverage.
The run-time is dummy, will add the actual logic in later commits.
Reviewers: morehouse, eugenis
Reviewed By: eugenis
Subscribers: srhines, llvm-commits, kubamracek
Differential Revision: https://reviews.llvm.org/D53227
llvm-svn: 344985
Before this patch we were returning an empty string in case we couldn't
create the output file. Now we return an expected string so we can
return and print the proper issue. We now return errors instead of bools
and defer printing to the call site.
llvm-svn: 344983
Summary:
Due to previous work to make WebAssembly MC by default stack-only
inline assembly now "just works" (previously it didn't since it had
no way to know types of registers), so no further work required.
So far we only have tests (in inline-asm.ll) which test with
non-existing instructions, so this adds a test that roundtrips
both the inline assembly and its surrounding code thru the assembler.
Reviewers: dschuff, sunfish
Subscribers: sbc100, jgravelle-google, eraman, aheejin, llvm-commits
Differential Revision: https://reviews.llvm.org/D52914
llvm-svn: 344977
Add an intrinsic that takes 2 integers and perform unsigned saturation
addition on them.
This is a part of implementing fixed point arithmetic in clang where some of
the more complex operations will be implemented as intrinsics.
Differential Revision: https://reviews.llvm.org/D53340
llvm-svn: 344971
analyzeBranch()/insertBranch() etc. do not properly deal with an undef
flag on the eflags input and used to produce invalid MIR. I don't see
this ever affecting real world inputs (I don't think it is possible to
produce undef flags with llvm IR), so I simply changed the code to bail
out in this case.
rdar://42122367
llvm-svn: 344970
I was trying to provide test coverage for D53533
with rL344964, but these don't do it...and I don't
think they add any value, so deleting.
llvm-svn: 344969
I was considering adding another boolean here. I standardized on bools
since they allow default member initializers in the class definition.
This makes ShowParsedOperands protected instead of private, but that's
probably fine.
Reduce the SmallVector size while we're at it, since the common case is
that there is never a pending error.
llvm-svn: 344967
I've included a fix to DAGCombiner::ForwardStoreValueToDirectLoad that I believe will prevent the previous miscompile.
Original commit message:
Theoretically this was done to simplify the amount of isel patterns that were needed. But it also meant a substantial number of our isel patterns have to match an explicit bitcast. By making the vXi32/vXi16/vXi8 types legal for loads, DAG combiner should be able to change the load type to rem
I had to add some additional plain load instruction patterns and a few other special cases, but overall the isel table has reduced in size by ~12000 bytes. So it looks like this promotion was hurting us more than helping.
I still have one crash in vector-trunc.ll that I'm hoping @RKSimon can help with. It seems to relate to using getTargetConstantFromNode on a load that was shrunk due to an extract_subvector combine after the constant pool entry was created. So we end up decoding more mask elements than the lo
I'm hoping this patch will simplify the number of patterns needed to remove the and/or/xor promotion.
Reviewers: RKSimon, spatel
Reviewed By: RKSimon
Subscribers: llvm-commits, RKSimon
Differential Revision: https://reviews.llvm.org/D53306
llvm-svn: 344965
Also, regenerate checks for these files. We should do better
on the vector tests by using the PatternMatch API instead of
BinaryOperator::isNot/isNeg.
llvm-svn: 344964
Summary:
Replace its functionality with a TableGen InstrInfo relational
instruction mapping. Although arguably more complex than the TableGen
backend, the relational mapping is a smaller maintenance burden than a
TableGen backend.
Reviewers: aardappel, aheejin, dschuff
Subscribers: mgorny, sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D53307
llvm-svn: 344962
Logs provided by @stella.stamenova indicate that on Linux, lldb adds a
spurious slide offset to the return PC it loads from AT_call_return_pc
attributes (see the list thread: "[PATCH] D50478: Add support for
artificial tail call frames").
This patch side-steps the issue by getting rid of the load address
calculation in lldb's CallEdge::GetReturnPCAddress.
The idea is to have the DWARF writer emit function-local offsets to the
instruction after a call. I.e. return-pc = label-after-call-insn -
function-entry. LLDB can simply add this offset to the base address of a
function to get the return PC.
Differential Revision: https://reviews.llvm.org/D53469
llvm-svn: 344960
Otherwise we can end up with a data-race when linking concurrently.
This should fix an intermittent failure in the multiple-compile-threads-basic.ll
testcase.
llvm-svn: 344956
