Evan Cheng b5d11980d9 Avoid creating BUILD_VECTOR of all zero elements of "non-normalized" type (e.g. v8i16 on x86) after legalizer. Instruction selection does not expect to see them. In all likelihood this can only be an issue in a bugpoint reduced test case. ... llvm-svn: 48136		2008-03-10 07:19:13 +00:00
clang	add comments about some simple optimizations that may become	2008-03-10 06:20:22 +00:00
llvm	Avoid creating BUILD_VECTOR of all zero elements of "non-normalized" type (e.g. v8i16 on x86) after legalizer. Instruction selection does not expect to see them. In all likelihood this can only be an issue in a bugpoint reduced test case.	2008-03-10 07:19:13 +00:00