https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102519
Bug ID: 102519
Summary: [12 Regression] VRP Jump threader memory explosion
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: memory-hog
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
CC: aldyh at gcc dot gnu.org, law at gcc dot gnu.org
Target Milestone: ---
After the VRP jump threader replacement on Monday, September 27, memory usage
for some testcases, such as gcc.target/powerpc/rlwimi-1.c has doubled. This is
causing new testsuite failures on AIX because of the default lower memory
limits on AIX. The testcases previously compiled with 1GB data size for the
compiler, and now require 2GB data size.
Similar to the problem exposed by Martin Sebor's patch a few weeks ago, this
likely is a problem with memory allocation in the new pass. A data structure
not placed in GC or not correctly tracked by GC.
