TargetRegisterInfo::getMinimalPhysRegClass() returns rtcGPR64RegClassID for X16
and X17, as it's the last matching class. This in turn gets passed to
AArch64RegisterBankInfo::getRegBankFromRegClass(), which hits an unreachable.
It seems sensible to handle this case, so copies from X16 and X17 work.
Copying from X17 is used in inline assembly in libunwind for pointer
authentication.
Differential Revision: https://reviews.llvm.org/D85720
If we have a mask, and a value x, where (x & mask) == x, we can drop the AND
and just use x.
This is about a 0.4% geomean code size improvement on CTMark at -O3 for AArch64.
In AArch64, this is most useful post-legalization. Patterns like this often
show up when legalizing s1s, which must be extended to larger types.
e.g.
```
%cmp:_(s32) = G_ICMP ...
%and:_(s32) = G_AND %cmp, 1
```
Since G_ICMP only produces a single bit, there's no reason to mask it with the
G_AND.
Differential Revision: https://reviews.llvm.org/D85463
Add handling for storing the extracted lower (truncated bits) element from a X86ISD::VTRUNC node - this can be lowered to a generic truncated store directly.
Differential Revision: https://reviews.llvm.org/D86158
In DAGTypeLegalizer::GenWidenVectorLoads the algorithm assumes it only
ever deals with fixed width types, hence the offsets for each individual
store never take 'vscale' into account. I've changed the code in that
function to use TypeSize instead of unsigned for tracking the remaining
load amount. In addition, I've changed the load loop to use the new
IncrementPointer helper function for updating the addresses in each
iteration, since this handles scalable vector types.
Also, I've added report_fatal_errors in GenWidenVectorExtLoads,
TargetLowering::scalarizeVectorLoad and TargetLowering::scalarizeVectorStores,
since these functions currently use a sequence of element-by-element
scalar loads/stores. In a similar vein, I've also added a fatal error
report in FindMemType for the case when we decide to return the element
type for a scalable vector type.
I've added new tests in
CodeGen/AArch64/sve-split-load.ll
CodeGen/AArch64/sve-ld-addressing-mode-reg-imm.ll
for the changes in GenWidenVectorLoads.
Differential Revision: https://reviews.llvm.org/D85909
Summary:
When the resource descriptor is of vgpr, we need a waterfall loop
to read into a sgpr. In this patchm we generalized the implementation
to work for any regster class sizes, and extend the work to MIMG
instructions.
Fixes: SWDEV-223405
Reviewers:
arsenm, nhaehnle
Differential Revision:
https://reviews.llvm.org/D82603
We probably want to introduce pseudo-instructions at some point, like
we have for binary operations, but this seems okay for now.
One thing I'm not sure about is whether we should be doing this as a
DAGCombine instead of directly pattern-matching it. I don't see any big
downside to doing it this way, though.
Differential Revision: https://reviews.llvm.org/D85681
This isn't necessaary for ACLE, but could be useful in other situations.
And the change is simple.
Differential Revision: https://reviews.llvm.org/D85251
Similar to this commit:
faf8065a99817bcb10e6f09b558fe3e0972c35ce
Testcase is pretty much the same as
test/CodeGen/AArch64/tailcall-explicit-sret.ll
Except it uses i64 (since we don't handle the i1024 return values yet), and
doesn't have indirect tail call testcases (because we can't translate those
yet).
Differential Revision: https://reviews.llvm.org/D86148
This is restricted to single use loads, which if we fold to sextloads we can
find more optimal addressing modes on AArch64.
This also fixes an overload the MachineFunction::getMachineMemOperand() method
which was incorrectly using the MF alignment instead of the MMO alignment.
Differential Revision: https://reviews.llvm.org/D85966
By detecting this sign extend pattern early, we can uncover opportunities for
more optimizations.
Differential Revision: https://reviews.llvm.org/D85965
VLD2/4 instructions cannot be predicated, so we cannot tail predicate
them from autovec. From intrinsics though, they should be valid as they
will just end up loading extra values into off vector lanes, not
effecting the on lanes. The same is true for loads in general where so
long as we are not using the other vector lanes, an unpredicated load
can be converted to a predicated one.
This marks VLD2 and VLD4 instructions as validForTailPredication and
allows any unpredicated load in tail predication loop, which seems to be
valid given the other checks we have.
Differential Revision: https://reviews.llvm.org/D86022
There are some cases where the instruction that sets up the iteration
count for a tail predicated loop cannot be moved before the dlstp,
stopping tail predication entirely. This patch checks if the mov operand
can be used and if so, uses that instead.
Differential Revision: https://reviews.llvm.org/D86087
We weren't looking through the parameters on calls at all.
E.g., say you had
```
declare i32 @zext(i32 zeroext %x)
...
%y = call i32 @zext(i32 %something)
...
```
At the point of the call, we wouldn't know that the %something should have the
zeroext attribute.
This sets flags in about the same way as
TargetLoweringBase::ArgListEntry::setAttributes.
Differential Revision: https://reviews.llvm.org/D86125
Summary:
This is a follow up for D82481. For .lcomm directive, although it's
not necessary to have .rename emitted, it's still desirable to do
it so that we do not see internal 'Rename..' gets print out in
symbol table. And we could have consistent naming between TC entry
and .lcomm. And also have consistent naming between IR and final
object file.
Reviewed By: hubert.reinterpretcast
Differential Revision: https://reviews.llvm.org/D86075
Allow non-VLX targets to use 512-bits VPERMV/VPERMV3 for 128/256-bit shuffles.
TBH I'm not sure these targets actually exist in the wild, but we're testing for them and its good test coverage for shuffle lowering/combines across different subvector widths.
Previously, it would successfully select and assert if not HSA or PAL
when expanding the pseudoinstruction. We don't need the
pseudoinstruction anymore since we know the total size after
legalization.
The code to determine the value size was overcomplicated and only
correct in the case where the result register already had a register
class assigned. We can always take the size directly from the
register's type.
Right shift patterns will no longer incorrectly accept a shift
amount of zero. At the same time they will allow larger shift
amounts that are now saturated to their upper bound.
Patterns have been extended to enable immediate forms for shifts
taking an arbitrary predicate.
This patch also unifies the code path for immediate parsing so the
i64 based shifts are no longer treated specially.
Differential Revision: https://reviews.llvm.org/D86084
This patch adds lowerShuffleWithVTRUNC to handle basic binary shuffles that can be lowered either as a pure ISD::TRUNCATE or a X86ISD::VTRUNC (with undef/zero values in the remaining upper elements).
We concat the binary sources together into a single 256-bit source vector. To avoid regressions we perform this after we've tried to lower with PACKS/PACKUS which typically does a cleaner job than a concat.
For non-AVX512VL cases we have to canonicalize VTRUNC cases to use a 512-bit source vectors (inserting undefs/zeros in the upper elements as necessary), truncate and then (possibly) extract the 128-bit result.
This should address the last regressions in D66004
Differential Revision: https://reviews.llvm.org/D86093
This patch implements the vec_extractm function prototypes in altivec.h in
order to utilize the vector extract with mask instructions introduced in Power10.
Differential Revision: https://reviews.llvm.org/D82675
LBAEL => LABEL
I encountered this typo elsewhere and I decided to run a global search.
It probably was unnoticed because I think CHECK-LBAEL: is ignored by
lit.
Differential Revision: https://reviews.llvm.org/D85569
The previous implementation was incorrect, and based off incorrect
instruction definitions. Unfortunately we can't match natural
addressing in a lot of cases due to the shift/scale applied in
getelementptrs. This relies on reducing the 64-bit shift to 32-bits.
The artifact combiner searches for the uses of G_MERGE_VALUES for
unmerge/trunc that need further combining. This also needs to handle
the vector merge opcodes the same way. This fixes leaving behind some
pairs I expected to be removed, that were if the legalizer is run a
second time.
We may have an SGPR->VGPR copy if a totally uniform pointer
calculation is used for a VGPR pointer operand.
Also hack around a bug in MUBUF matching which would incorrectly use
MUBUF for global when flat was requested. This should really be a
predicate on the parent pattern, but the DAG always checked this
manually inside the complex pattern.
This fixes the "Unable to insert indirect branch" fatal error sometimes
seen when generating position-independent code.
Patch by msizanoen1
Reviewed By: jrtc27
Differential Revision: https://reviews.llvm.org/D84833
Support f128 using VE instructions. Update regression tests.
I've noticed there is no load or store i128 test, so I add them too.
Reviewed By: simoll
Differential Revision: https://reviews.llvm.org/D86035
If we can't identify alloca used in lifetime marker we
need to assume to worst case scenario.
Reviewed By: eugenis
Differential Revision: https://reviews.llvm.org/D84630
