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@dependabot dependabot bot commented on behalf of github Jan 31, 2025

Bumps the npm_and_yarn group with 2 updates in the /mlir/utils/vscode directory: minimatch and qs.

Updates minimatch from 3.0.4 to 3.1.2

Commits

Updates qs from 6.10.1 to 6.14.0

Changelog

Sourced from qs's changelog.

6.14.0

  • [New] parse: add throwOnParameterLimitExceeded option (#517)
  • [Refactor] parse: use utils.combine more
  • [patch] parse: add explicit throwOnLimitExceeded default
  • [actions] use shared action; re-add finishers
  • [meta] Fix changelog formatting bug
  • [Deps] update side-channel
  • [Dev Deps] update es-value-fixtures, has-bigints, has-proto, has-symbols
  • [Tests] increase coverage

6.13.1

  • [Fix] stringify: avoid a crash when a filter key is null
  • [Fix] utils.merge: functions should not be stringified into keys
  • [Fix] parse: avoid a crash with interpretNumericEntities: true, comma: true, and iso charset
  • [Fix] stringify: ensure a non-string filter does not crash
  • [Refactor] use __proto__ syntax instead of Object.create for null objects
  • [Refactor] misc cleanup
  • [Tests] utils.merge: add some coverage
  • [Tests] fix a test case
  • [actions] split out node 10-20, and 20+
  • [Dev Deps] update es-value-fixtures, mock-property, object-inspect, tape

6.13.0

  • [New] parse: add strictDepth option (#511)
  • [Tests] use npm audit instead of aud

6.12.3

  • [Fix] parse: properly account for strictNullHandling when allowEmptyArrays
  • [meta] fix changelog indentation

6.12.2

  • [Fix] parse: parse encoded square brackets (#506)
  • [readme] add CII best practices badge

6.12.1

  • [Fix] parse: Disable decodeDotInKeys by default to restore previous behavior (#501)
  • [Performance] utils: Optimize performance under large data volumes, reduce memory usage, and speed up processing (#502)
  • [Refactor] utils: use +=
  • [Tests] increase coverage

6.12.0

  • [New] parse/stringify: add decodeDotInKeys/encodeDotKeys options (#488)
  • [New] parse: add duplicates option
  • [New] parse/stringify: add allowEmptyArrays option to allow [] in object values (#487)
  • [Refactor] parse/stringify: move allowDots config logic to its own variable
  • [Refactor] stringify: move option-handling code into normalizeStringifyOptions
  • [readme] update readme, add logos (#484)
  • [readme] stringify: clarify default arrayFormat behavior
  • [readme] fix line wrapping

... (truncated)

Commits
  • 32dcc63 v6.14.0
  • 4ec582b [Dev Deps] update es-value-fixtures, has-bigints
  • a240c52 [Tests] increase coverage
  • 25956a7 [Refactor] parse: use utils.combine more
  • b189ed4 [patch] parse: add explicit throwOnLimitExceeded default
  • 1d590de [actions] simplify finisher
  • 6cd60a5 [actions] use shared action
  • 89edfd2 [Deps] update side-channel
  • e26e7a8 [Dev Deps] update has-proto, has-symbols
  • 51fdc98 [actions] re-add finishers
  • Additional commits viewable in compare view

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Bumps the npm_and_yarn group with 2 updates in the /mlir/utils/vscode directory: [minimatch](https://github.com/isaacs/minimatch) and [qs](https://github.com/ljharb/qs).


Updates `minimatch` from 3.0.4 to 3.1.2
- [Changelog](https://github.com/isaacs/minimatch/blob/main/changelog.md)
- [Commits](isaacs/minimatch@v3.0.4...v3.1.2)

Updates `qs` from 6.10.1 to 6.14.0
- [Changelog](https://github.com/ljharb/qs/blob/main/CHANGELOG.md)
- [Commits](ljharb/qs@v6.10.1...v6.14.0)

---
updated-dependencies:
- dependency-name: minimatch
  dependency-type: indirect
  dependency-group: npm_and_yarn
- dependency-name: qs
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

Signed-off-by: dependabot[bot] <[email protected]>
@dependabot dependabot bot added dependencies Pull requests that update a dependency file javascript Pull requests that update Javascript code labels Jan 31, 2025
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dependabot bot commented on behalf of github Mar 12, 2025

This pull request was built based on a group rule. Closing it will not ignore any of these versions in future pull requests.

To ignore these dependencies, configure ignore rules in dependabot.yml

@dependabot dependabot bot deleted the dependabot/npm_and_yarn/mlir/utils/vscode/npm_and_yarn-a168e6724e branch March 12, 2025 16:32
paulhuggett pushed a commit that referenced this pull request Mar 25, 2025
… pointers (llvm#132261)

Currently, the helpers to get fir::ExtendedValue out of hlfir::Entity
use hlfir.declare second result (`#1`) in most cases. This is because
this result is the same as the input and matches what FIR was getting
before lowering to HLFIR.

But this creates odd situations when both hlfir.declare are raw pointers
and either result ends-up being used in the IR depending on whether the
code was generated by a helper using fir::ExtendedValue, or via "pure
HLFIR" helpers using the first result.

This will typically prevent simple CSE and easy identification that two
operation (e.g load/store) are touching the exact same memory location
without using alias analysis or "manual detection" (looking for common
hlfir.declare defining op).

Hence, when hlfir.declare results are both raw pointers, use `#0` when
producing `fir::ExtendedValue`.
When `#0` is a fir.box, keep using `#1` because these are not the same. 
The only code change is in HLFIRTools.cpp and is pretty small, but there
is a big test fallout of `#1` to `#0`.
paulhuggett pushed a commit that referenced this pull request Mar 25, 2025
…too. (llvm#132267)

Observed in Wine when trying to intercept `ExitThread`, which forwards
to `ntdll.RtlExitUserThread`.

`gdb` interprets it as `xchg %ax,%ax`.
`llvm-mc` outputs simply `nop`.

```
==Asan-i386-calls-Dynamic-Test.exe==964==interception_win: unhandled instruction at 0x7be27cf0: 66 90 55 89 e5 56 50 8b
```

```
Wine-gdb> bt
#0  0x789a1766 in __interception::GetInstructionSize (address=<optimized out>, rel_offset=<optimized out>) at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/interception/interception_win.cpp:983
#1  0x789ab480 in __sanitizer::SharedPrintfCode(bool, char const*, char*) () at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/sanitizer_common/sanitizer_printf.cpp:311
#2  0x789a18e7 in __interception::OverrideFunctionWithHotPatch (old_func=2078440688, new_func=2023702608, orig_old_func=warning: (Internal error: pc 0x792f1a2c in read in CU, but not in symtab.)warning: (Error: pc 0x792f1a2c in address map, but not in symtab.)0x792f1a2c) at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/interception/interception_win.cpp:1118
llvm#3  0x789a1f34 in __interception::OverrideFunction (old_func=2078440688, new_func=2023702608, orig_old_func=warning: (Internal error: pc 0x792f1a2c in read in CU, but not in symtab.)warning: (Error: pc 0x792f1a2c in address map, but not in symtab.)0x792f1a2c) at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/interception/interception_win.cpp:1224
llvm#4  0x789a24ce in __interception::OverrideFunction (func_name=0x78a0bc43 <vtable for __asan::AsanThreadContext+1163> "ExitThread", new_func=2023702608, orig_old_func=warning: (Internal error: pc 0x792f1a2c in read in CU, but not in symtab.)warning: (Error: pc 0x792f1a2c in address map, but not in symtab.)0x792f1a2c)    at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/interception/interception_win.cpp:1369
llvm#5  0x789f40ef in __asan::InitializePlatformInterceptors () at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_win.cpp:190
llvm#6  0x789e0c3c in __asan::InitializeAsanInterceptors () at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_interceptors.cpp:802
llvm#7  0x789ee6b5 in __asan::AsanInitInternal () at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:442
llvm#8  0x789eefb0 in __asan::AsanInitFromRtl () at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:522
llvm#9  __asan::AsanInitializer::AsanInitializer (this=<optimized out>) at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:542
llvm#10 __cxx_global_var_init () at C:/llvm-mingw/llvm-mingw/llvm-project/compiler-rt/lib/asan/asan_rtl.cpp:546
...
Wine-gdb> disassemble /r 2078440688,2078440688+20
Dump of assembler code from 0x7be27cf0 to 0x7be27d04:
   0x7be27cf0 <_RtlExitUserThread@4+0>: 66 90                   xchg   %ax,%ax
...
```
paulhuggett pushed a commit that referenced this pull request Apr 11, 2025
…d A520 (llvm#132246)

Inefficient SVE codegen occurs on at least two in-order cores,
those being Cortex-A510 and Cortex-A520. For example a simple vector
add

```
void foo(float a, float b, float dst, unsigned n) {
    for (unsigned i = 0; i < n; ++i)
        dst[i] = a[i] + b[i];
}
```

Vectorizes the inner loop into the following interleaved sequence
of instructions.

```
        add     x12, x1, x10
        ld1b    { z0.b }, p0/z, [x1, x10]
        add     x13, x2, x10
        ld1b    { z1.b }, p0/z, [x2, x10]
        ldr     z2, [x12, #1, mul vl]
        ldr     z3, [x13, #1, mul vl]
        dech    x11
        add     x12, x0, x10
        fadd    z0.s, z1.s, z0.s
        fadd    z1.s, z3.s, z2.s
        st1b    { z0.b }, p0, [x0, x10]
        addvl   x10, x10, #2
        str     z1, [x12, #1, mul vl]
```

By adjusting the target features to prefer fixed over scalable if the
cost is equal we get the following vectorized loop.

```
         ldp q0, q3, [x11, #-16]
         subs    x13, x13, llvm#8
         ldp q1, q2, [x10, #-16]
         add x10, x10, llvm#32
         add x11, x11, llvm#32
         fadd    v0.4s, v1.4s, v0.4s
         fadd    v1.4s, v2.4s, v3.4s
         stp q0, q1, [x12, #-16]
         add x12, x12, llvm#32
```

Which is more efficient.
paulhuggett pushed a commit that referenced this pull request Apr 11, 2025
… A510/A520 (llvm#134606)

Recommit. This work was done by llvm#132246 but failed buildbots due to the
test introduced needing updates

Inefficient SVE codegen occurs on at least two in-order cores, those
being Cortex-A510 and Cortex-A520. For example a simple vector add

```
void foo(float a, float b, float dst, unsigned n) {
    for (unsigned i = 0; i < n; ++i)
        dst[i] = a[i] + b[i];
}
```

Vectorizes the inner loop into the following interleaved sequence of
instructions.

```
        add     x12, x1, x10
        ld1b    { z0.b }, p0/z, [x1, x10]
        add     x13, x2, x10
        ld1b    { z1.b }, p0/z, [x2, x10]
        ldr     z2, [x12, #1, mul vl]
        ldr     z3, [x13, #1, mul vl]
        dech    x11
        add     x12, x0, x10
        fadd    z0.s, z1.s, z0.s
        fadd    z1.s, z3.s, z2.s
        st1b    { z0.b }, p0, [x0, x10]
        addvl   x10, x10, #2
        str     z1, [x12, #1, mul vl]
```

By adjusting the target features to prefer fixed over scalable if the
cost is equal we get the following vectorized loop.

```
         ldp q0, q3, [x11, #-16]
         subs    x13, x13, llvm#8
         ldp q1, q2, [x10, #-16]
         add x10, x10, llvm#32
         add x11, x11, llvm#32
         fadd    v0.4s, v1.4s, v0.4s
         fadd    v1.4s, v2.4s, v3.4s
         stp q0, q1, [x12, #-16]
         add x12, x12, llvm#32
```

Which is more efficient.
paulhuggett pushed a commit that referenced this pull request Apr 11, 2025
…s=128. (llvm#134068)

When compiling with -msve-vector-bits=128 or vscale_range(1, 1) and when
the offsets allow it, we can pair SVE LDR/STR instructions into Neon
LDP/STP.

For example, given:
```cpp
#include <arm_sve.h>

void foo(double const *ldp, double *stp) {
  svbool_t pg = svptrue_b64();
  svfloat64_t ld1 = svld1_f64(pg, ldp);
  svfloat64_t ld2 = svld1_f64(pg, ldp+svcntd());
  svst1_f64(pg, stp, ld1);
  svst1_f64(pg, stp+svcntd(), ld2);
}
```

When compiled with `-msve-vector-bits=128`, we currently generate:
```gas
foo:
        ldr     z0, [x0]
        ldr     z1, [x0, #1, mul vl]
        str     z0, [x1]
        str     z1, [x1, #1, mul vl]
        ret
```

With this patch, we instead generate:
```gas
foo:
        ldp     q0, q1, [x0]
        stp     q0, q1, [x1]
        ret
```

This is an alternative, more targetted approach to llvm#127500.
paulhuggett pushed a commit that referenced this pull request Apr 11, 2025
…ctor-bits=128." (llvm#134997)

Reverts llvm#134068

Caused a stage 2 build failure:
https://lab.llvm.org/buildbot/#/builders/41/builds/6016

```
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o 
/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support/Caching.cpp
Opcode has unknown scale!
UNREACHABLE executed at ../llvm/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp:4530!
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage2/include -I/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/include -mcpu=neoverse-512tvb -mllvm -scalable-vectorization=preferred -mllvm -treat-scalable-fixed-error-as-warning=false -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o -c /home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support/Caching.cpp
1.	<eof> parser at end of file
2.	Code generation
3.	Running pass 'Function Pass Manager' on module '/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/llvm/llvm/lib/Support/Caching.cpp'.
4.	Running pass 'AArch64 load / store optimization pass' on function '@"_ZNSt17_Function_handlerIFN4llvm8ExpectedISt8functionIFNS1_ISt10unique_ptrINS0_16CachedFileStreamESt14default_deleteIS4_EEEEjRKNS0_5TwineEEEEEjNS0_9StringRefESB_EZNS0_10localCacheESB_SB_SB_S2_IFvjSB_S3_INS0_12MemoryBufferES5_ISH_EEEEE3$_0E9_M_invokeERKSt9_Any_dataOjOSF_SB_"'
 #0 0x0000b6eae9b67bf0 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x81c7bf0)
 #1 0x0000b6eae9b65aec llvm::sys::RunSignalHandlers() (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x81c5aec)
 #2 0x0000b6eae9acd5f4 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 llvm#3 0x0000f16c1aff28f8 (linux-vdso.so.1+0x8f8)
 llvm#4 0x0000f16c1aacf1f0 __pthread_kill_implementation ./nptl/pthread_kill.c:44:76
 llvm#5 0x0000f16c1aa8a67c gsignal ./signal/../sysdeps/posix/raise.c:27:6
 llvm#6 0x0000f16c1aa77130 abort ./stdlib/abort.c:81:7
 llvm#7 0x0000b6eae9ad6628 (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x8136628)
 llvm#8 0x0000b6eae72e95a8 (/home/tcwg-buildbot/worker/clang-aarch64-sve-vla-2stage/stage1.install/bin/clang+++0x59495a8)
 llvm#9 0x0000b6eae74ca9a8 (anonymous namespace)::AArch64LoadStoreOpt::findMatchingInsn(llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>, (anonymous namespace)::LdStPairFlags&, unsigned int, bool) AArch64LoadStoreOptimizer.cpp:0:0
llvm#10 0x0000b6eae74c85a8 (anonymous namespace)::AArch64LoadStoreOpt::tryToPairLdStInst(llvm::MachineInstrBundleIterator<llvm::MachineInstr, false>&) AArch64LoadStoreOptimizer.cpp:0:0
llvm#11 0x0000b6eae74c624c (anonymous namespace)::AArch64LoadStoreOpt::optimizeBlock(llvm::MachineBasicBlock&, bool) AArch64LoadStoreOptimizer.cpp:0:0
llvm#12 0x0000b6eae74c429c (anonymous namespace)::AArch64LoadStoreOpt::runOnMachineFunction(llvm::MachineFunction&) AArch64LoadStoreOptimizer.cpp:0:0
```
paulhuggett pushed a commit that referenced this pull request Apr 18, 2025
…vailable (llvm#135343)

When a frame is inlined, LLDB will display its name in backtraces as
follows:
```
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.3
  * frame #0: 0x0000000100000398 a.out`func() [inlined] baz(x=10) at inline.cpp:1:42
    frame #1: 0x0000000100000398 a.out`func() [inlined] bar() at inline.cpp:2:37
    frame #2: 0x0000000100000398 a.out`func() at inline.cpp:4:15
    frame llvm#3: 0x00000001000003c0 a.out`main at inline.cpp:7:5
    frame llvm#4: 0x000000026eb29ab8 dyld`start + 6812
```
The longer the names get the more confusing this gets because the first
function name that appears is the parent frame. My assumption (which may
need some more surveying) is that for the majority of cases we only care
about the actual frame name (not the parent). So this patch removes all
the special logic that prints the parent frame.

Another quirk of the current format is that the inlined frame name does
not abide by the `${function.name-XXX}` format variables. We always just
print the raw demangled name. With this patch, we would format the
inlined frame name according to the `frame-format` setting (see the
test-cases).

If we really want to have the `parentFrame [inlined] inlinedFrame`
format, we could expose it through a new `frame-format` variable (e..g.,
`${function.inlined-at-name}` and let the user decide where to place
things.
paulhuggett pushed a commit that referenced this pull request Apr 18, 2025
Currently, given:
```cpp
uint64_t incb(uint64_t x) {
  return x+svcntb();
}
```
LLVM generates:
```gas
incb:
        addvl   x0, x0, #1
        ret
```
Which is equivalent to:
```gas
incb:
        incb    x0
        ret
```

However, on microarchitectures like the Neoverse V2 and Neoverse V3,
the second form (with INCB) can have significantly better latency and
throughput (according to their SWOG). On the Neoverse V2, for example,
ADDVL has a latency and throughput of 2, whereas some forms of INCB
have a latency of 1 and a throughput of 4. The same applies to DECB.
This patch adds patterns to prefer the cheaper INCB/DECB forms over
ADDVL where applicable.
paulhuggett pushed a commit that referenced this pull request May 19, 2025
… `getForwardSlice` matchers (llvm#115670)

Improve mlir-query tool by implementing `getBackwardSlice` and
`getForwardSlice` matchers. As an addition `SetQuery` also needed to be
added to enable custom configuration for each query. e.g: `inclusive`,
`omitUsesFromAbove`, `omitBlockArguments`.

Note: backwardSlice and forwardSlice algoritms are the same as the ones
in `mlir/lib/Analysis/SliceAnalysis.cpp`
Example of current matcher. The query was made to the file:
`mlir/test/mlir-query/complex-test.mlir`

```mlir
./mlir-query /home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir -c "match getDefinitions(hasOpName(\"arith.add
f\"),2)"

Match #1:

/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:5:8:
  %0 = linalg.generic {indexing_maps = [#map, #map], iterator_types = ["parallel", "parallel"]} ins(%arg0 : tensor<5x5xf32>) outs(%arg1 : tensor<5x5xf32>) {
       ^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:7:10: note: "root" binds here
    %2 = arith.addf %in, %in : f32
         ^
Match #2:

/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:10:16:
  %collapsed = tensor.collapse_shape %0 [[0, 1]] : tensor<5x5xf32> into tensor<25xf32>
               ^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:13:11:
    %c2 = arith.constant 2 : index
          ^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:14:18:
    %extracted = tensor.extract %collapsed[%c2] : tensor<25xf32>
                 ^
/home/dbudii/personal/llvm-project/mlir/test/mlir-query/complex-test.mlir:15:10: note: "root" binds here
    %2 = arith.addf %extracted, %extracted : f32
         ^
2 matches.
```
paulhuggett pushed a commit that referenced this pull request Jun 3, 2025
Fixes llvm#123300

What is seen 
```
clang-repl> int x = 42;
clang-repl> auto capture = [&]() { return x * 2; };
In file included from <<< inputs >>>:1:
input_line_4:1:17: error: non-local lambda expression cannot have a capture-default
    1 | auto capture = [&]() { return x * 2; };
      |                 ^
zsh: segmentation fault  clang-repl --Xcc="-v"

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x8)
  * frame #0: 0x0000000107b4f8b8 libclang-cpp.19.1.dylib`clang::IncrementalParser::CleanUpPTU(clang::PartialTranslationUnit&) + 988
    frame #1: 0x0000000107b4f1b4 libclang-cpp.19.1.dylib`clang::IncrementalParser::ParseOrWrapTopLevelDecl() + 416
    frame #2: 0x0000000107b4fb94 libclang-cpp.19.1.dylib`clang::IncrementalParser::Parse(llvm::StringRef) + 612
    frame llvm#3: 0x0000000107b52fec libclang-cpp.19.1.dylib`clang::Interpreter::ParseAndExecute(llvm::StringRef, clang::Value*) + 180
    frame llvm#4: 0x0000000100003498 clang-repl`main + 3560
    frame llvm#5: 0x000000018d39a0e0 dyld`start + 2360
```

Though the error is justified, we shouldn't be interested in exiting
through a segfault in such cases.

The issue is that empty named decls weren't being taken care of
resulting into this assert


https://github.com/llvm/llvm-project/blob/c1a229252617ed58f943bf3f4698bd8204ee0f04/clang/include/clang/AST/DeclarationName.h#L503

Can also be seen when the example is attempted through xeus-cpp-lite.


![image](https://github.com/user-attachments/assets/9b0e6ead-138e-4b06-9ad9-fcb9f8d5bf6e)
paulhuggett pushed a commit that referenced this pull request Jun 3, 2025
# Symptom

We have seen SIGSEGV like this:
```
* thread #1, name = 'lldb-server', stop reason = SIGSEGV
    frame #0: 0x00007f39e529c993 libc.so.6`__pthread_kill_internal(signo=11, threadid=<unavailable>) at pthread_kill.c:46:37
    ...
  * frame llvm#5: 0x000056027c94fe48 lldb-server`lldb_private::process_linux::GetPtraceScope() + 72
    frame llvm#6: 0x000056027c92f94f lldb-server`lldb_private::process_linux::NativeProcessLinux::Attach(int) + 1087
    ...
```
See [full stack trace](https://pastebin.com/X0d6QhYj).

This happens on Linux where LLDB doesn't have access to
`/proc/sys/kernel/yama/ptrace_scope`.

A similar error (an unchecked `Error`) can be reproduced by running the
newly added unit test without the fix. See the "Test" section below.


# Root cause

`GetPtraceScope()`
([code](https://github.com/llvm/llvm-project/blob/328f40f408c218f25695ea42c844e43bef38660b/lldb/source/Plugins/Process/Linux/Procfs.cpp#L77))
has the following `if` statement:
```
llvm::Expected<int> lldb_private::process_linux::GetPtraceScope() {
  ErrorOr<std::unique_ptr<MemoryBuffer>> ptrace_scope_file =
      getProcFile("sys/kernel/yama/ptrace_scope");
  if (!*ptrace_scope_file)
    return errorCodeToError(ptrace_scope_file.getError());
  ...
}
```

The intention of the `if` statement is to check whether the
`ptrace_scope_file` is an `Error` or not, and return the error if it is.
However, the `operator*` of `ErrorOr` returns the value that is stored
(which is a `std::unique_ptr<MemoryBuffer>`), so what the `if` condition
actually do is to check if the unique pointer is non-null.

Note that the method `ErrorOr::getStorage()` ([called
by](https://github.com/llvm/llvm-project/blob/328f40f408c218f25695ea42c844e43bef38660b/llvm/include/llvm/Support/ErrorOr.h#L162-L164)
`ErrorOr::operator *`) **does** assert on whether or not `HasError` has
been set (see
[ErrorOr.h](https://github.com/llvm/llvm-project/blob/328f40f408c218f25695ea42c844e43bef38660b/llvm/include/llvm/Support/ErrorOr.h#L235-L243)).
However, it seems this wasn't executed, probably because the LLDB was a
release build.

# Fix

The fix is simply remove the `*` in the said `if` statement.
paulhuggett pushed a commit that referenced this pull request Jun 6, 2025
…142952)

This was removed in llvm#135343 in
favour of making it a format variable, which we do here. This follows
the precedent of the `[opt]` and `[artificial]` markers.

Before:
```
 thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
 * frame #0: 0x000000010000037c a.out`inlined1() at inline.cpp:4:3
   frame #1: 0x000000010000037c a.out`regular() at inline.cpp:6:17
   frame #2: 0x00000001000003b8 a.out`inlined2() at inline.cpp:7:43
   frame llvm#3: 0x00000001000003b4 a.out`main at inline.cpp:10:3
   frame llvm#4: 0x0000000186345be4 dyld`start + 7040
```

After (note the `[inlined]` markers):
```
thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
* frame #0: 0x000000010000037c a.out`inlined1() at inline.cpp:4:3 [inlined]
  frame #1: 0x000000010000037c a.out`regular() at inline.cpp:6:17
  frame #2: 0x00000001000003b8 a.out`inlined2() at inline.cpp:7:43 [inlined]
  frame llvm#3: 0x00000001000003b4 a.out`main at inline.cpp:10:3
  frame llvm#4: 0x0000000186345be4 dyld`start + 7040
```

rdar://152642178
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