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Author SHA1 Message Date
Michael Liao 10ff96ce8c fix a case where all operands of BUILD_VECTOR are undefined 
llvm-svn: 162214
 2012-08-20 17:59:18 +00:00
Michael Liao 34107b9177 fix PR11334 
- FP_EXTEND only support extending from vectors with matching elements.
  This results in the scalarization of extending to v2f64 from v2f32,
  which will be legalized to v4f32 not matching with v2f64.
- add X86-specific VFPEXT supproting extending from v4f32 to v2f64.
- add BUILD_VECTOR lowering helper to recover back the original
  extending from v4f32 to v2f64.
- test case is enhanced to include different vector width.

llvm-svn: 161894
 2012-08-14 21:24:47 +00:00