http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50353
Bug #: 50353
Summary: vec_set not used for vector indexing
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: [email protected]
ReportedBy: [email protected]
The code in c-typeck.c:build_array_ref that handles indexing of vector types
unconditionally calls c_common_mark_addressable_vec, thus disabling the use
of target-supplied vec_set patterns.
E.g.:
typedef float f2 __attribute__((vector_size(8)));
f2 f (f2 in)
{
f2 tmp;
tmp[0] = 3;
tmp[1] = 5;
return in * tmp;
}
tmp gets placed in memory before any optimizers can even run.
