[Bug optimization/13996] New: Assembler warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 14

["bugreport4 at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

See also bug reports 7908 and 7909. 

I am getting the following GAS warning when compiling my code, 

g++   -Wall -O2 -g  -DHPUX_VERS=1123  -DACE_HAS_THREADS -
D_POSIX_C_SOURCE=199506L -D_INCLUDE_LONGLONG    -fno-exceptions -fcheck-new -
DANAM_HP_BUILD_ID_2  -I. -I/home/ace/5.3/ACE_wrappers/ -
I//home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snmp//snmpkit -
I//home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snmp//include -
I//home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snmp//snmplib -
I../../DATAKINETICS/inc -I//home/nightly_build/ia64-hp-
hpux11.23_g++_3.3.2/snacc//ia64-hp-hpux11.23_g++_3.3.2/include/snacc/c++ -
I../../MML  -v -save-temps -Wno-unknown-pragmas -Werror  -c -fPIC -
o .shobj/FAR_GsmToAsc.ia64-hp-hpux11.23_g++_3.3.2.o FAR_GsmToAsc.cpp
Reading specs from /usr/local/lib/gcc-lib/ia64-hp-hpux11.23/3.3.2/specs
Configured with: ./configure --enable-threads=posix --with-gnu-as --enable-
languages=c,c++,f77 --disable-nls --with-as=/var/home/binutils/binutils-
2.14/gas/as-new
Thread model: posix
gcc version 3.3.2
 /usr/local/lib/gcc-lib/ia64-hp-hpux11.23/3.3.2/cc1plus -E -D__GNUG__=3 -
quiet -v -I. -I/home/ace/5.3/ACE_wrappers/ -I//home/nightly_build/ia64-hp-
hpux11.23_g++_3.3.2/snmp//snmpkit -I//home/nightly_build/ia64-hp-
hpux11.23_g++_3.3.2/snmp//include -I//home/nightly_build/ia64-hp-
hpux11.23_g++_3.3.2/snmp//snmplib -I../../DATAKINETICS/inc -
I//home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snacc//ia64-hp-
hpux11.23_g++_3.3.2/include/snacc/c++ -I../../MML -D__GNUC__=3 -
D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=2 -DHPUX_VERS=1123 -DACE_HAS_THREADS -
D_POSIX_C_SOURCE=199506L -D_INCLUDE_LONGLONG -DANAM_HP_BUILD_ID_2 
FAR_GsmToAsc.cpp -Wall -Wno-unknown-pragmas -Werror -fno-exceptions -fcheck-
new -fPIC -O2 FAR_GsmToAsc.ii
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/ia64-hp-hpux11.23/include"
#include "..." search starts here:
#include <...> search starts here:
 .
 /home/ace/5.3/ACE_wrappers
 //home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snmp/snmpkit
 //home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snmp/include
 //home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snmp/snmplib
 ../../DATAKINETICS/inc
 //home/nightly_build/ia64-hp-hpux11.23_g++_3.3.2/snacc/ia64-hp-
hpux11.23_g++_3.3.2/include/snacc/c++
 ../../MML
 /usr/local/include/c++/3.3.2
 /usr/local/include/c++/3.3.2/ia64-hp-hpux11.23
 /usr/local/include/c++/3.3.2/backward
 /usr/local/include
 /usr/local/lib/gcc-lib/ia64-hp-hpux11.23/3.3.2/include
 /usr/include
End of search list.
 /usr/local/lib/gcc-lib/ia64-hp-hpux11.23/3.3.2/cc1plus -fpreprocessed 
FAR_GsmToAsc.ii -quiet -dumpbase FAR_GsmToAsc.cpp -auxbase-
strip .shobj/FAR_GsmToAsc.ia64-hp-hpux11.23_g++_3.3.2.o -g -O2 -Wall -Wno-
unknown-pragmas -Werror -version -fno-exceptions -fcheck-new -fPIC -o 
FAR_GsmToAsc.s
GNU C++ version 3.3.2 (ia64-hp-hpux11.23)
	compiled by GNU C version 3.3.2.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
 /var/home/binutils/binutils-2.14/gas/as-new -x -o .shobj/FAR_GsmToAsc.ia64-hp-
hpux11.23_g++_3.3.2.o FAR_GsmToAsc.s
FAR_GsmToAsc.s: Assembler messages:
FAR_GsmToAsc.s:716: Warning: Use of 'mov' may violate WAW dependency 'GR%, % 
in 1 - 127' (impliedf), specific resource number is 14
FAR_GsmToAsc.s:716: Warning: Only the first path encountering the conflict is 
reported
FAR_GsmToAsc.s:715: Warning: This is the location of the conflicting usage
FAR_GsmToAsc.s:1292: Warning: Use of 'mov' may violate WAW dependency 'GR%, % 
in 1 - 127' (impliedf), specific resource number is 14
FAR_GsmToAsc.s:1292: Warning: Only the first path encountering the conflict is 
reported
FAR_GsmToAsc.s:1291: Warning: This is the location of the conflicting usage

-- 
           Summary: Assembler warning: Use of 'mov' may violate WAW
                    dependency 'GR%, % in 1 - 127' (impliedf), specific
                    resource number is 14
           Product: gcc
           Version: 3.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bugreport4 at hotmail dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: ia64-hp-hpux11.23
  GCC host triplet: ia64-hp-hpux11.23
GCC target triplet: ia64-hp-hpux11.23


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13996