[Bug target/30961] New: redundant reg/mem stores/moves
pluto at agmk dot net
gcc-bugzilla@gcc.gnu.org
Sun Feb 25 18:26:00 GMT 2007
float convert( unsigned in )
{
float f;
__builtin_memcpy( &f, &in, sizeof( in ) );
return f;
}
unsigned short load( void* p )
{
unsigned short v;
__builtin_memcpy( &v, p, sizeof( v ) );
return v;
}
gcc-4.2.0-20070221
$ g++ temp.cpp -O2 -S
_Z7convertj:
movl %edi, -4(%rsp)
movss -4(%rsp), %xmm1
movaps %xmm1, %xmm0
ret
_Z4loadPv:
movzwl (%rdi), %eax
movw %ax, -2(%rsp)
movzwl %ax, %eax
ret
--
Summary: redundant reg/mem stores/moves
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pluto at agmk dot net
GCC target triplet: x86_64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30961
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