2 Commits

Author	SHA1	Message	Date
Nate Begeman	cb6d1c8193	Formalize the notion that AVX and SSE are non-overlapping extensions from the compiler's point of view. Per email discussion, we either want to always use VEX-prefixed instructions or never use them, and are taking "HasAVX" to mean "Always use VEX". Passing -mattr=-avx,+sse42 should serve to restore legacy SSE support when desirable. ... llvm-svn: 121439	2010-12-10 00:26:57 +00:00
Bruno Cardoso Lopes	7cb26cb8be	- Teach SSEDomainFix to switch between different levels of AVX instructions. Here we guess that AVX will have domain issues, so just implement them for consistency and in the future we remove if it's unnecessary. ... - Make foldMemoryOperandImpl aware of 256-bit zero vectors folding and support the 128-bit counterparts of AVX too. - Make sure MOV[AU]PS instructions are only selected when SSE1 is enabled, and duplicate the patterns to match AVX. - Add a testcase for a simple 128-bit zero vector creation. llvm-svn: 110946	2010-08-12 20:20:53 +00:00