[llvm-profgen] Support loading symbols from symtab for COFF (#179175)
PE has strict size constraints. The DWARF sections can occupy a
significant amount of spaces. When using pseudo probe, the symtab
already contains all the required info except symbol size. This
patch teachs llvm-profgen to load symbol size from PDB file.
[CIR] Add static_local attribute to GlobalOp and GetGlobalOp
This attribute marks function-local static variables that require
guarded initialization (e.g., C++ static local variables with
non-constant initializers). It is used by CIRGen to communicate
to LoweringPrepare which globals need guard variable emission.
[CIR][LoweringPrepare] Emit guard variables for static local initialization
This implements the lowering of static local variables with the Itanium C++ ABI
guard variable pattern in LoweringPrepare.
When a GlobalOp has the static_local attribute and a ctor region, this pass:
1. Creates a guard variable global (mangled name from AST)
2. Inserts the guard check pattern at each GetGlobalOp use site:
- Load guard byte with acquire ordering
- If zero, call __cxa_guard_acquire
- If acquire returns non-zero, inline the ctor region code
- Call __cxa_guard_release
3. Clears the static_local attribute and ctor region from the GlobalOp
[CIR] Add CIRGen support for static local variables with non-constant initializers
This adds CIRGen infrastructure for C++ function-local static variables
that require guarded initialization (Itanium C++ ABI).
Changes:
- Add ASTVarDeclAttr to carry VarDecl AST through the pipeline
- Add emitGuardedInit() to CIRGenCXXABI for guarded initialization
- Add emitCXXGuardedInit() to CIRGenFunction
- Replace NYI in addInitializerToStaticVarDecl() with ctor region emission
- Set static_local attribute on GlobalOp and GetGlobalOp
The global's ctor region contains the initialization code, which will be
lowered by LoweringPrepare to emit the actual guard variable pattern with
__cxa_guard_acquire/__cxa_guard_release calls.
[CIR] Add ASTVarDeclInterface for AST attribute access
Add the ASTVarDeclInterface which provides methods to access clang AST
VarDecl information from CIR attributes. This interface enables:
- mangleStaticGuardVariable: Mangle guard variable names using clang's
MangleContext
- isLocalVarDecl: Check if a variable is function-local
- getTLSKind: Get thread-local storage kind
- isInline: Check if the variable is inline
- getTemplateSpecializationKind: Get template specialization info
- getVarDecl: Direct access to the underlying VarDecl pointer
This infrastructure is needed for proper handling of static local
variables with guard variables in LoweringPrepare.
[msan][NFCI] Remove redundant tests from aarch64-bf16-dotprod-intrinsics.ll (#178832)
https://github.com/llvm/llvm-project/pull/178510#discussion_r2739401507
requested simplifying test cases by using parameters directly for the
intrinsic calls. Doing that reduces the test case to duplicates of
existing tests, thus this patch deletes the redundant tests.
[msan] Add intermediate verbosity instruction dump (#178771)
This patch does not change MSan's instrumentation.
-msan-dump-{heuristic,strict}-instructions currently prints out two
lines per instruction:
1) instruction name only e.g., `call llvm.aarch64.neon.uqsub.v16i8`
2) the full instruction, including actual variables e.g., `%vqsubq_v.i15
= call noundef <16 x i8> @llvm.aarch64.neon.uqsub.v16i8(<16 x i8>
%vext21.i, <16 x i8> splat (i8 1)), !dbg !66`
Option 1) is too sparse for some uses, because it does not contain the
return types or parameter types (although `.v16i8` is part of the
function name in this example, in general, the function name does not
describe the types completely; e.g., `<16 x float>
llvm.x86.avx512.mask.scalef.ps.512(<16 x float>, <16 x float>, <16 x
float>, i16, i32)`). OTOH option 2) can be too verbose because it
contains the actual variables.
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[CIR][NFC] Cleanup some stale missing features markers (#179822)
This deletes a few missing features markers where the missing code had
actually been implemented and deletes a handful that were not being used
anywhere.
