On Thu, 22 Sep 2022 07:02:16 GMT, Hao Sun <hao...@openjdk.org> wrote:
> This warning seems to be a false positive, because 1) array "fq" with > elements from index 0 to "jz" has already been initialized as "fw" at line > 290 [1], and 2) variable "jz" should be non-negative from the comment at line > 99 [2]. > > Note-1: GCC warning option -Wmaybe-uninitialized is not a new one. Note-2: > x86-64 build with GCC 12 on Ubuntu 22.04 passed in my local test. > > This warning is raised only on GCC 12 + AArch64. I suspect it might be some > GCC 12 bug, so I reported it to GCC community [3]. > > Since it involves third party code, I think it's better to suppress the > warning by simply disabling this warning option in the makefile. > > Testing: Release builds with GCC 9, GCC 11 and GCC 12 passed on Ubuntu > 22.04/AArch64 system. > > [1] > https://github.com/openjdk/jdk/blob/master/src/java.base/share/native/libfdlibm/k_rem_pio2.c#L290 > > [2] > https://github.com/openjdk/jdk/blob/master/src/java.base/share/native/libfdlibm/k_rem_pio2.c#L99 > > [3] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106992 This pull request has now been integrated. Changeset: 02ea3381 Author: Hao Sun <hao...@openjdk.org> Committer: Ningsheng Jian <nj...@openjdk.org> URL: https://git.openjdk.org/jdk/commit/02ea338177df781912dc782e32200eaf4731a0da Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod 8293887: AArch64 build failure with GCC 12 due to maybe-uninitialized warning in libfdlibm k_rem_pio2.c Reviewed-by: erikj, shade, ihse ------------- PR: https://git.openjdk.org/jdk/pull/10386
