Summary: We were serializing it no matter what, which was against the spec

Reviewers: sammccall

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79692

Summary: Depends On D79374

Differential Revision: https://reviews.llvm.org/D79455

Summary: Depends On D79373

Differential Revision: https://reviews.llvm.org/D79374

Summary:
Cast from a value interpreted as floating-point to the corresponding signed
integer value. Similar to an element-wise `static_cast` in C++, performs an
element-wise conversion operation.

Differential Revision: https://reviews.llvm.org/D79373

It is bad practice to capture by default (via [&] in this case) when
using lambdas, so we should avoid that as much as possible.

This patch fixes that in the getForwardingRegsDefinedByMI
from DwarfDebug module.

Differential Revision: https://reviews.llvm.org/D79616

The test was missed in 8222107a.

We should use explicit type instead of auto type deduction when
the type is so obvious. In addition, we remove ambiguity, since auto
type deduction sometimes is not that intuitive, so that could lead
us to some unwanted behavior.

This patch fixes that in the collectCallSiteParameters() from
DwarfDebug module.

Differential Revision: https://reviews.llvm.org/D79624

RecoveryExprs are modeled as dependent type to prevent bogus diagnostics
and crashes in clang.

This patch allows to preseve the type for broken calls when the
RecoveryEprs have a known type, e.g. a broken non-overloaded call, a
overloaded call when the all candidates have the same return type, so
that more features (code completion still work on "take2args(x).^") still
work.

However, adding the type is risky, which may result in more clang code being
affected leading to new crashes and hurt diagnostic, and it requires large
effort to minimize the affect (update all sites in clang to handle errorDepend
case), so we add a new flag (off by default) to allow us to develop/test
them incrementally.

This patch also has some trivial fixes to suppress diagnostics (to prevent regressions).

Tested:

all existing tests are passed (when both "-frecovery-ast", "-frecovery-ast-type" flags are flipped on);

Reviewed By: sammccall

Subscribers: rsmith, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79160

Following test cases need minor adjustment in order to accomodate xfail
decorator:
  lldb/test/Shell/SymbolFile/NativePDB/break-by-line.cpp
  lldb/test/Shell/SymbolFile/NativePDB/source-list.cpp

Summary:
In D65848 the function getFuncNameInModule was refactored to no longer use module.
This diff removes the parameter and rename the function name to avoid confusion.

Reviewers: wenlei, wmi, davidxl

Reviewed By: wenlei

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79310

gcov by default prints to a .gcov file. With --stdout, stdout is used.
Some summary information is omitted. There is no separator for multiple
source files.

The old QuerriedAAs contained two vectors, one for required one for
optional dependences (=queries). We now use a single vector and encode
the kind directly in the pointer.

This reduces memory consumption and makes the connection between
abstract attributes and their dependences clearer.

No functional change is intended, changes in the test are due to
different order in the query map. Neither the order before nor now is in
any way special.

---

Single run of the Attributor module and then CGSCC pass (oldPM)
for SPASS/clause.c (~10k LLVM-IR loc):

Before:
```
calls to allocation functions: 543734 (329735/s)
temporary memory allocations: 105895 (64217/s)
peak heap memory consumption: 19.19MB
peak RSS (including heaptrack overhead): 102.26MB
total memory leaked: 269.10KB
```

After:
```
calls to allocation functions: 513292 (341511/s)
temporary memory allocations: 106028 (70544/s)
peak heap memory consumption: 13.35MB
peak RSS (including heaptrack overhead): 95.64MB
total memory leaked: 269.10KB
```

Difference:
```
calls to allocation functions: -30442 (208506/s)
temporary memory allocations: 133 (-910/s)
peak heap memory consumption: -5.84MB
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B
```

---

Reviewed By: uenoku

Differential Revision: https://reviews.llvm.org/D78729

We have the getNegatibleCost/getNegatedExpression to evaluate the cost and negate the expression.
However, during negating the expression, the cost might change as we are changing the DAG,
and then, hit the assertion if we negated the wrong expression as the cost is not trustful anymore.

This patch is target to remove the getNegatibleCost to avoid the out of sync with getNegatedExpression,
and check the cost during negating the expression. It also reduce the duplicated code between
getNegatibleCost and getNegatedExpression. And fix the crash for the test in D76638

Reviewed By: RKSimon, spatel

Differential Revision: https://reviews.llvm.org/D77319

Tests impacted by these decorators fail on arm-linux-gnueabihf.

These have been triaged and appropriate bugs have been filed.

NativePDB tests fail on arm-linux buildbot. clang-cl driver crashes with
-m32 option. Bug files http://llvm.org/pr45867

[X86] Fix combineVectorCompareAndMaskUnaryOp regression after 0e8e7314

When we have an existing `argmemonly` or `inaccessiblememorargmemonly`
we used to "know" that information. However, interprocedural constant
propagation can invalidate these attributes. We now ignore and remove
these attributes for internal functions (which may be affected by IP
constant propagation), if we are deriving new attributes for the
function.

As we replace values with constants interprocedurally, we also need to
do this "look-through" step during the generic value traversal or we
would derive properties from replaced values. While this is often not
problematic, it is when we use the "kind" of a value for reasoning,
e.g., accesses to arguments allow `argmemonly`.

When we categorize a pointer value we bailed at `null` before. If we
know `null` is not a valid memory location we can ignore it as there
won't be an access at all.

We now use getPointerDereferenceableBytes to determine `nonnull` and
`dereferenceable` facts from the IR. We also use getPointerAlignment in
AAAlign for the same reason. The latter can interfere with callbacks so
we do restrict it to non-function-pointers for now.

MaterializationResponsibility.

MaterializationResponsibility objects provide a connection between a
materialization process (compiler, jit linker, etc.) and the JIT state held in
the ExecutionSession and JITDylib objects. Switching to shared ownership
extends the lifetime of JITDylibs to ensure they remain accessible until all
materializers targeting them have completed. This will allow (in a follow-up
patch) JITDylibs to be removed from the ExecutionSession and placed in a
pending-destruction state while they are kept alive to communicate errors
to/from any still-runnning materialization processes. The intent is to enable
JITDylibs to be safely removed even if they have running compiles targeting
them.

Defaulting to -Xclang -coverage-version='407*' makes .gcno/.gcda
compatible with gcov [4.7,8)

In addition, delete clang::CodeGenOptionsBase::CoverageExtraChecksum and GCOVOptions::UseCfgChecksum.
We can infer the information from the version.

With this change, .gcda files produced by `clang --coverage a.o` linked executable can be read by gcov 4.7~7.
We don't need other -Xclang -coverage* options.
There may be a mismatching version warning, though.

(Note, GCC r173147 "split checksum into cfg checksum and line checksum"
 made gcov 4.7 incompatible with previous versions.)

Commit 1e68724d removed the alignment
argument from the memset intrinsic. Update the BrainF example to match.

Reviewed By: jyknight
Differential Revision: https://reviews.llvm.org/D79601

Objective-C++11 and under MS extensions.

This matches the MSVC behavior, and means that Objective-C behaves as a
set of extensions to the base language, rather than replacing the base
language rule with a different one.

This fixes an accidental breakage of exporting symbols using def
files, when the symbol name contains a period, since commit
0ca06f79, mixing up a symbol name containing a period with
the case of exporting a symbol as a forward to another dll.

Differential Revision: https://reviews.llvm.org/D79619

The 'class' or 'struct' keyword is only permitted as part of either an
enum definition or a standalone opaque-enum-declaration, not as part of
an elaborated type specifier. We previously failed to diagnose this, and
generally didn't properly implement the restrictions on elaborated type
specifiers for enumeration types.

In passing, also fixed incorrect parsing for enum-bases, which we
previously parsed as a type-name, but are actually a type-specifier-seq.
This matters for cases like 'enum E : int *p;', which is valid as a
Microsoft extension.

Plus some minor parse diagnostic improvements.

Bumped the recently-added ExtWarn for 'enum E : int x;' to be
DefaultError; this is not an intentional extension, so producing an
error by default seems appropriate, but the warning flag to disable it
may still be useful for code written against old Clang. The same
treatment is given here to the diagnostic for 'enum class E x;', which
we similarly have incorrectly accepted for many years. These diagnostics
continue to be suppressed under -fms-extensions and when compiling
Objective-C code. We will need to decide separately whether Objective-C
should follow the C++ rules or the (older) MSVC rules.

rL144865 incorrectly wrote function names for GCOV_TAG_FUNCTION
(this might be part of the reasons the header says
"We emit files in a corrupt version of GCOV's "gcda" file format").

rL176173 and rL177475 realized the problem and introduced -coverage-no-function-names-in-data
to work around the issue. (However, the description is wrong.
libgcov never writes function names, even before GCC 4.2).

In reality, the linker command line has to look like:

clang --coverage -Xclang -coverage-version='407*' -Xclang -coverage-cfg-checksum -Xclang -coverage-no-function-names-in-data

Failing to pass -coverage-no-function-names-in-data can make gcov 4.7~7
either produce wrong results (for one gcov-4.9 program, I see "No executable lines")
or segfault (gcov-7).
(gcov-8 uses an incompatible format.)

This patch deletes -coverage-no-function-names-in-data and the related
function names support from libclang_rt.profile

Mostly found by asserting on tests that have undef operands. I'm
sure this isn't an exhaustive list.

Summary:
The assume builder was non-deterministic when working on unamed values.
this patch fixes this.

Reviewers: jdoerfert

Reviewed By: jdoerfert

Subscribers: hiraditya, mgrang, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78616

This fixes a bug reported by Alex Renda on LLVMDev where mca did not correctly
mark a resource group as "reserved".
(See http://lists.llvm.org/pipermail/llvm-dev/2020-May/141485.html).

The issue was caused by a wrong check in function `initializeUsedResources`.
As a consequence of this, a resource group was left unreserved, and its field
`NumUnits` incorrectly reported an unrealistic number of consumed resource
units.

This patch fixes the issue with the handling of reserved resources in the
InstrBuilder class, and adds a simple test for it.  Ideally, as suggested by
Andy Trick, most of these problems will disappear if in the future we will
introduce a (optional) DelayCycles vector for SchedWriteRes.