Add scheduling information for vector extension in SiFive7,
while using new LMUL & SEW scheduling constructs.
Differential Revision: https://reviews.llvm.org/D149495
- Rename `LimitForRegisterSize` to `MaxVFOnly` to make the meaning of the limit less ambiguous
- Rename `OpsWidth` to `ActualVF`, which makes it clear that this is the VF we are using for vectorization.
- Replace the if-else code for the initialization of OpsWidth with an std::min.
Differential Revision: https://reviews.llvm.org/D150241
The generic ABI says:
> Padding is present, if necessary, to ensure 8 or 4-byte alignment for the next note entry (depending on whether the file is a 64-bit or 32-bit object). Such padding is not included in descsz.
Our parsing code currently aligns n_namesz. Fix the bug by aligning the start
offset of the descriptor instead. This issue has been benign because the primary
uses of sh_addralign=8 notes are `.note.gnu.property`, where
`sizeof(Elf_Nhdr) + sizeof("GNU") = 16` (already aligned by 8).
In practice, many 64-bit systems incorrectly use sh_addralign=4 notes.
We can use sh_addralign (= p_align) to decide the descriptor padding.
Treat an alignment of 0 and 1 as 4. This approach matches modern GNU readelf
(since 2018).
We have a few tests incorrectly using sh_addralign=0. We may make our behavior
stricter after fixing these tests.
Linux kernel dumped core files use `p_align=0` notes, so we need to support the
case for compatibility.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D150022
This patch enables signed truncation check transforms for i8 on rv32 when XVT is i64 and Zbb is enabled.
It is a small improvement of D149977.
Reviewed By: craig.topper
Differential Revision: https://reviews.llvm.org/D150177
Emit FNMADD instead of FNEG(FMADD) for optimization levels
above Oz when fast-math flags (nsz+contract) permit it.
Differential Revision: https://reviews.llvm.org/D149260
The new test case showed that the NoPHIs flag needs to be cleared.
Original commit message:
[SystemZ] Bugfix in expansion of memmem operations.
Since NC, OC, and XC clobber CC, the EXRL_Pseudo targeting these must also be
marked to do so.
Original patch by uweigand.
Reviewed by: uweigand
Differential Revision: https://reviews.llvm.org/D150251
Fixes: https://github.com/llvm/llvm-project/issues/62572
At the moment, we set the BC bit in DPP for both bound_ctrl:0 and
bound_ctrl:1, for compatibility with sp3 (see PR35397). However, this
hack is only needed for GFX8. For newer GFXs, sp3 behaves as expected,
i.e. it sets the bit when bound_ctrl:1 and clears it when bound_ctrl:0.
This patch updates LLVM to do the same for GFX11 or newer. We preserve
the current behaviour for GFX9 and 10 so we don't break any existing
code.
Differential Revision: https://reviews.llvm.org/D149254
Sorry - mir test fails with expensive checks on build bot.
Seems to relate to the fact that there are no PHIs in the .mir input, but after
they are created the verifyer reports "Found PHI instruction with NoPHIs property
set".
This reverts commit 00454a17f361d677d5423905c888daca1a80661a.
The old LoopUnswitch pass unswitched selects, but the changes were never
ported to the new SimpleLoopUnswitch.
We unswitch by turning:
```
S = select %cond, %a, %b
```
into:
```
head:
br %cond, label %then, label %tail
then:
br label %tail
tail:
S = phi [ %a, %then ], [ %b, %head ]
```
Unswitch selects are always nontrivial, since the successors do not exit
the loop and the loop body always needs to be cloned.
Unswitch selects always need to freeze the conditional if the
conditional could be poison or undef. Selects don't propagate
poison/undef, and branches on poison/undef causes UB.
Reviewed By: nikic, kachkov98, vitalybuka
Differential Revision: https://reviews.llvm.org/D138526
Without the fix gcc complains with
../lib/CodeGen/GlobalISel/CombinerHelper.cpp:1652:52: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
1652 | SrcDef->getOpcode() == TargetOpcode::G_OR && "Unexpected op");
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
Without this function lli will error out on MinGW with a missing symbol error
for __main.
Cygwin and MinGW insert calls from the main function to the runtime function
__main. The __main function is responsible for setting up main's environment
(e.g. running static constructors), however this is not needed when running
under lli: the executor process will have run non-JIT ctors, and ORC will take
care of running JIT'd ctors. To avoid a missing symbol error we just implement
__main as a no-op.
Some generic cases have empty prologue on some platforms like hexagon,
but non empty prologue on some other platform like PPC.
Remove the checks for the optimized lines hit by D147506.
According to the v spec, the Zvfh extension depends on the Zve32f and Zfhmin extensions.
Reviewed By: craig.topper
Differential Revision: https://reviews.llvm.org/D150016
Reland D147506 after fixing the failure in bot
https://lab.llvm.org/buildbot/#/builders/247/builds/4125
Some debuggers like DBX on AIX assume the address in debug line
entries is always incremental. But clang generates two entries (entry
for file scope line and entry for prologue end) with same address if
prologue is empty
And if the prologue is empty, seems the first debug line entry for the
function is unnecessary(i.e. removing the first entry won't impact the
behavior in GDB on Linux), so I implement this for all debuggers.
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D147506
Bugs were found by Svace static analysis tool. Null pointers are
dereferenced right after error checking that does not return from
function.
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D147706
Seems to be causing a bug in CorrelatedValuePropegation. Reverting
while the issue is investigated.
This reverts commit 6c667abf3294d61e4fbe1238e1755c79f7547f1b.
IRMutation::mutateModule() currently requires the bitcode size of the module.
To compute the bitcode size, one way is to write the module to a buffer using
BitcodeWriter and calculating the buffer size. This would be fine for a single
mutation, but infeasible for repeated mutations due to the large overhead. It
turns out that the only IR strategy weight calculation method that depends on
the current module size is InstDeleterStrategy, which deletes instructions more
frequently as the module size approaches a given max size. However, there is no
real need for the size to be in bytes of bitcode, so we can use a different
metric. One alternative is to let the size be the number of objects in the
Module, including instructions, basic blocks, globals, and aliases. Although
getting the number of instructions is still O(n), it should have significantly
less overhead than BitcodeWriter. This suggestion would cause a change to the
IRMutator API, since IRMutator::mutateModule() can calculate the Module size
itself.
Reviewed By: Peter
Differential Revision: https://reviews.llvm.org/D149989
While investigating a bug in Clang, I noticed that -Wframe-larger-than
was emitting extra debug information along with the diagnostic. It
turns out that 2e1e2f52f357768186ecfcc5ac53d5fa53d1b094 fixed an issue
with the diagnostic, but accidentally left in some debug code that was
exposed in all builds.
So now we no longer emit things like:
8/4294967304 (0.00%) spills, 4294967296/4294967304 (100.00%) variables
along with the diagnostic
