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The Linaro Toolchain Working Group (TCWG) is pleased to announce the 2014.09 release of the Linaro GCC 4.9 source package.

Linaro GCC 4.9 2014.09 is the sixth Linaro GCC source package release. It is based on FSF GCC 4.9.2+svn214896 and includes performance improvements and bug fixes.

With the imminent release of ARMv8 hardware and the recent release of the GCC 4.9 compiler the Linaro TCWG will be focusing on stabilization and performance of the compiler as the FSF GCC compiler. The Linaro TCWG provides stable1 quarterly releases and monthly engineering2 releases.

Interesting changes in this GCC source package release include:

  • Updates to GCC 4.9.2-pre+svn214896
  • Backport of [AArch32] TARGET_ATOMIC_ASSIGN_EXPAND_FENV hook
  • Backport of [AArch32] Enable arm target in ira-shrinkwrap-prep* testcases
  • Backport of [AArch32] fix check_effective_target_arm_nothumb
  • Backport of Do not convert cast + __builtin_round into __builtin_lround unless -fno-math-errno is used
  • Backport of [AArch64] Fix Thumb2 testsuite fallout
  • Backport of [AArch64_be] Fix vec_select hi/lo mask confusions.
  • Backport of [AArch64_be] Don’t fold reduction intrinsics
  • Backport of [AArch64] Fix offset glitch in load reg pair pattern
  • Backport of [AArch64][2/2] Add constrain to address offset in storewb_pair/loadwb_pair insns
  • Backport of [AArch64] Improve TARGET_LEGITIMIZE_ADDRESS_P hook
  • Backport of [AArch64] Removed unused get_lane and dup_lane builtins.
  • Backport of [sched-deps] Generalise usage of macro fusion to work on any two insns
  • Backport of [doc] Document clrsb optab and fix some inconsistencies
  • Backport of [AArch64] Some aarch64-builtins.c cleanup.
  • Backport of Guard transformation to lrint by -fno-math-errno
  • Backport of [AArch32] Adjust clz, rbit and rev patterns for -mrestrict-it
  • Backport of [AArch32/AArch64] Add CRC32 scheduling information to Cortex-A53 and Cortex-A57
  • Backport of [AArch64] Use REG_P and CONST_INT_P instead of GET_CODE + comparison
  • Backport of [AArch64] Prefer dup to zip for vec_perm_const; enable dup for bigendian; add testcase.
  • Backport of [AArch32] TARGET_ATOMIC_ASSIGN_EXPAND_FENV hook
  • Backport of [AArch64] Use MOVN to generate 64-bit negative immediates where sensible
  • Backport of [AArch64] Delete f_sels, f_seld types, use fcsel instead
  • Backport of PR target/60606 target/61330 fix ICE
  • Backport of [AArch64] PR target/63190

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1Stable source package releases are defined as releases where the full Linaro Toolchain validation plan is executed.

2Engineering source package releases are defined as releases where the compiler is only put through unit-testing and full validation is not performed.