https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102527
Bug ID: 102527
Summary: [12 regression] out of memory compiling insn-emit.c
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: aldyh at gcc dot gnu.org
Target Milestone: ---
Host: i386-pc-solaris2.11
Target: i386-pc-solaris2.11
Build: i386-pc-solaris2.11
Between 20210927 (rev dd11aab6463880c35d942c4a4fd346fdaeeb8e72) and
20210928 (rev a11052d98db2f2a61841f0c5ee84de4ca1b3e296), 32-bit Solaris/x86
bootstrap broke compiling insn-emit.c in stage 2:
cc1plus: out of memory allocating 65536 bytes after a total of 2747670528 bytes
make[3]: *** [Makefile:1136: insn-emit.o] Error 1
Comparing to the cc1plus memory consumption in the working configuration,
memory usage has almost quadrupled from ca. 750 MB to ca. 2.6 GB.
A reghunt identified this patch as the culprit:
commit 0288527f47cec6698b31ccb3210816415506009e
Author: Aldy Hernandez <al...@redhat.com>
Date: Tue Sep 21 10:27:53 2021 +0200
Replace VRP threader with a hybrid forward threader.
sparc-sun-solaris2.11 isn't affected, neither is i686-pc-linux-gnu.
Compiling with -fmem-report doesn't produce anything in the failing case.
