https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61901
Bug ID: 61901
Summary: cc1 sanitizer runtime error in i386.c
classify_argument
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
After building gcc with -fsanitize=undefined, analyzing the gcc testsuite with
the "sanitized" cc1 I got runtime error messages
"../../gcc-4.9.1/gcc/config/i386/i386.c:6556:60: runtime error:
load of value 32767, which is not a valid value for type 'x86_64_reg_class'"
The instruction at i386.c:6556 is
"classes[i] = merge_classes (subclasses[i], classes[i]);"
This is in classify_argument.
The reproducers are pr20020-1.c/pr20020-2.c/pr42025-2.c
