[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 (#179827)
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
This doesn't unwrap the high level constructs just yet - 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 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.
Merge tag 'riscv-for-linus-7.0-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Paul Walmsley:
- Add support for control flow integrity for userspace processes.
This is based on the standard RISC-V ISA extensions Zicfiss and
Zicfilp
- Improve ptrace behavior regarding vector registers, and add some
selftests
- Optimize our strlen() assembly
- Enable the ISO-8859-1 code page as built-in, similar to ARM64, for
EFI volume mounting
- Clean up some code slightly, including defining copy_user_page() as
copy_page() rather than memcpy(), aligning us with other
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[OpenMP][MLIR] Modify lowering OpenMP Dialect lowering to support attach mapping
This PR adjusts the LLVM-IR lowering to support the new attach map type that the runtime
uses to link data and pointer together, this swaps the mapping from the older
OMP_MAP_PTR_AND_OBJ map type in most cases and allows slightly more complicated ref_ptr/ptee
and attach semantics.
asmc: Convert driver to CTLFLAG_MPSAFE
Replace CTLFLAG_NEEDGIANT with CTLFLAG_MPSAFE for all sysctls.
The driver already uses spin mutexes (sc->sc_mtx) for hardware
access protection and does not require the Giant lock.
This improves scalability by allowing concurrent sysctl access
without Giant serialization.
Reviewed by: ngie, adrian
Differential Revision: https://reviews.freebsd.org/D54613
Merge tag 'for-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply and reset updates from Sebastian Reichel:
"power-supply core:
- sysfs: constify pointer passed to dev_attr_psp
- extend DT binding documentation for battery cells to allow
describing voltage drop behaviour
power-supply drivers:
- multiple: Remove unused gpio include header
- multiple: Fix potential IRQ use-after-free on driver unload
- bd71828: Add support for ROHM BD72720
- misc small fixes
reset drivers:
- tdx-ec-poweroff: fix restart"
* tag 'for-v7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (30 commits)
power: supply: bd71828: Use dev_err_probe()
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[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 static_local attribute to GlobalOp and GetGlobalOp (#179826)
This attribute marks function-local static variables that require
guarded initialization (e.g., C++ static local variables with
non-constant initializers).
It will be used by CIRGen to communicate to LoweringPrepare which globals need guard variable emission.
This PR only adds the attribute and tests, CIRGen is in the next one.
