Release Notes

clang-r370808

Upstream Cherry-picks

  • 1689ad27af5c [builtins] Implement rounding mode support for i386/x86_64
  • 9e7ce07a8866 ARM: Don't emit R_ARM_NONE relocations to compact unwinding decoders in .ARM.exidx on Android.
  • 51adeae1c90c remove redundant LLVM version from version string when setting CLANG_VENDOR
  • 8ea148dc0cbf [Builtins] Fix bug where powerpc builtins specializations didn't remove generic implementations.
  • 7a2b704bf0cf [Sema][Typo Correction] Fix another infinite loop on ambiguity
  • r370981 [DebugInfo] Emit DW_TAG_enumeration_type for referenced global enumerator.
  • r371003 Revert "Revert "[builtins] Rounding mode support for addxf3/subxf3""
  • r371090 Fix windows-x86-debug compilation with python enabled using multi-target generator
  • r371111 [IfConversion] Fix diamond conversion with unanalyzable branches.
  • r371202 Revert r370635, it caused PR43241.
  • r371215 Revert "Revert r370635, it caused PR43241."
  • r371216 Reland D66717 [ELF] Do not ICF two sections with different output sections (by SECTIONS commands)
  • r371262 [IR] CallBrInst: scan+update arg list when indirect dest list changes
  • r371434 [IfConversion] Correctly handle cases where analyzeBranch fails.
  • r371643 [IRMover] Don't map globals if their types are the same
  • r371804 [ELF] Delete a redundant assignment to SectionBase::assigned. NFC
  • r371859 [Sema][Typo Correction] Fix potential infite loop on ambiguity checks
  • r371957 [ELF] Map the ELF header at imageBase
  • r372047 Fix swig python package path
  • r372194 Cache PYTHON_EXECUTABLE for windows
  • r372364 Revert "Fix swig python package path"
  • r372400 [ELF] Error if the linked-to section of a SHF_LINK_ORDER section is discarded
  • r372482 [LLDB] Fix compilation for MinGW, remove redundant class name on inline member
  • r372493 Use _WIN32 instead of _MSC_VER
  • r372587 [LLDB] Add a missing specification of linking against dbghelp
  • r372734 [ELF] Make MergeInputSection merging aware of output sections
  • r372735 [ELF] Delete SectionBase::assigned
  • r372835 [lldb] [cmake] Fix installing Python modules on systems using /usr/lib
  • r372996 [ELF] Set SectionBase::partition in processSectionCommands
  • r373022 Always rebuild a DeclRefExpr if its FoundDecl would change.
  • r373035 hwasan: Compatibility fixes for short granules.
  • r373255 ELF: Don't merge SHF_LINK_ORDER sections for different output sections in relocatable links.
  • r373929 Fix Calling Convention through aliases
  • r375166 libhwasan initialisation include kernel syscall ABI relaxation
  • r375298 hwasan: Add missing SANITIZER_INTERFACE_ATTRIBUTE on __hwasan_personality_wrapper.

Notes

New Clang warnings encountered:

  • -Wreorder-init-list
  • -Walloca
  • -Wc99-designator
  • -Wdangling-gsl
  • -Wimplicit-fallthrough
  • -Wimplicit-int-float-conversion
  • -Wincomplete-setjmp-declaration
  • -Wpointer-compare
  • -Wxor-used-as-pow

-Wimplicit fallthrough was previously only checked for C++ code, but Clang can now for for C code. __attribute__((__fallthrough__)) should be used to explicitly specify intentional fallthrough to silence the warning.

Lots of cherry picks are fixes for LLDB and HWASAN.

r373035 is slightly different from upstream due to not additionally cherry picking r372338.

Writes to variables declared const through casts to non-const pointers (explicitly undefined behavior) are now removed. The next release of Clang adds UBSAN support for catching such mistakes.

Created

Nov 11 2019

clang-r365631c

Upstream Cherry-picks

  • r366130 [LoopUnroll+LoopUnswitch] do not transform loops containing callbr
  • r369761 [llvm-objcopy] Strip debug sections when running with --strip-unneeded.
  • r370981 [DebugInfo] Emit DW_TAG_enumeration_type for referenced global enumerator.
  • r372047 Fix swig python package path
  • r372194 Cache PYTHON_EXECUTABLE for windows
  • r372364 Revert "Fix swig python package path"
  • r372587 [LLDB] Add a missing specification of linking against dbghelp
  • r372835 [lldb] [cmake] Fix installing Python modules on systems using /usr/lib

Notes

Fixes for:

  • asm goto + LTO in Android Linux kernels
  • debug info missing for enums
  • NDK fixes for:
    • stripping debug sections w/ llvm-objcopy/llvm-strip
    • LLDB

Created

Sep 26 2019

Older Releases

Release notes not available.