http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49525
Summary: [4.4] wrong code and wrong warning for bitfield
related operations
Product: gcc
Version: 4.4.5
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: marcin.slus...@gmail.com
Created attachment 24595
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24595
testcase
Compilation of attached file generates wrong warning:
$ g++-4.4.5 -c -O2 -Wall all.c
all.c: In function ‘void test(const st_src_reg*, ureg_dst)’:
all.c:118: warning: ‘reg’ is used uninitialized in this function
all.c:118: note: ‘reg’ was declared here
And produces wrong code - at random after "test" function, src[i].Negate (one
bit unsigned bit-field) becomes 1 when src_reg[i]->negate == 0 - something
which should not happen.
The bug does not manifest when compiled with gcc instead of g++ or with g++
4.3.5 or 4.5.2.
