https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66827
Bug ID: 66827
Summary: [6 Regression] left shifts of negative value warnings
due to C++14 switch
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: trippels at gcc dot gnu.org
Target Milestone: ---
For C++98 -fsanitize=undefined didn't warn in case of left shifts of negative
values.
Now that trunk switched to C++14 a number of new warnings popped up:
gcc/config/rs6000/rs6000.c:5398:36: runtime error: left shift of negative value
-12301
gcc/config/rs6000/rs6000.md:3126:17: runtime error: left shift of negative
value -1
gcc/dce.c:287:16: runtime error: ../../gcc/gcc/haifa-sched.c:1442:26:left shift
of negative value -1
gcc/expmed.c:3002:15: runtime error: left shift of negative value -1
gcc/haifa-sched.c:1164:24: runtime error: left shift of negative value -1
gcc/haifa-sched.c:1442:26: runtime error: left shift of negative value -1
gcc/hwint.h:250:19: runtime error: left shift of negative value -1000013824
gcc/real.c:2861:25: runtime error: left shift of negative value -63
gcc/sched-deps.c:112:20: runtime error: left shift of negative value -1
gcc/sreal.c:231:20: runtime error: left shift of negative value -1092263868
libcpp/files.c:683:30: runtime error: left shift of negative value -1
libiberty/regex.c:6970:11: runtime error: left shift of negative value -1
libiberty/regex.c:7165:4: runtime error: left shift of negative value -1
