[Bug target/57949] [powerpc64] Structure parameter alignment issue with vector extensions

[wschmidt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57949

--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The front end identifies the structure as having the correct alignment.  From
the 001t.tu dump:

@2846   record_type      name: @2857    size: @127     algn: 128     
                         tag : struct   flds: @2858   
@2857   identifier_node  strg: s        lngt: 1       
@2858   field_decl       name: @2870    type: @16      scpe: @2846   
                         srcp: vec-abi.c:3             chain: @2871   
                         size: @22      algn: 64       bpos: @20     
@2870   identifier_node  strg: m        lngt: 1       
@2871   field_decl       name: @2882    type: @2817    scpe: @2846   
                         srcp: vec-abi.c:3             size: @19     
                         algn: 128      bpos: @19     
@2882   identifier_node  strg: v        lngt: 1