8 Commits

Author	SHA1	Message	Date
Benjamin Kramer	0ccab2d66c	X86: Custom lower sext v16i8 to v16i16, and the corresponding truncate. ... Also update the cost model. llvm-svn: 193270	2013-10-23 21:06:07 +00:00
Benjamin Kramer	da8446b833	X86: Custom lower zext v16i8 to v16i16. ... On sandy bridge (PR17654) we now get vpxor %xmm1, %xmm1, %xmm1 vpunpckhbw %xmm1, %xmm0, %xmm2 vpunpcklbw %xmm1, %xmm0, %xmm0 vinsertf128 $1, %xmm2, %ymm0, %ymm0 On haswell it's a simple vpmovzxbw %xmm0, %ymm0 There is a maze of duplicated and dead transforms and patterns in this area. Remove the dead custom lowering of zext v8i16 to v8i32, that's already handled by LowerAVXExtend. llvm-svn: 193262	2013-10-23 19:19:04 +00:00
Arnaud A. de Grandmaison	e206e6e80a	Cleanup: test source files do not need to be executable ... llvm-svn: 180003	2013-04-22 08:02:43 +00:00
Nadav Rotem	9450fcfff1	Revert 172708. ... The optimization handles esoteric cases but adds a lot of complexity both to the X86 backend and to other backends. This optimization disables an important canonicalization of chains of SEXT nodes and makes SEXT and ZEXT asymmetrical. Disabling the canonicalization of consecutive SEXT nodes into a single node disables other DAG optimizations that assume that there is only one SEXT node. The AVX mask optimizations is one example. Additionally this optimization does not update the cost model. llvm-svn: 172968	2013-01-20 08:35:56 +00:00
Elena Demikhovsky	f6a30e05d5	Optimization for the following SIGN_EXTEND pairs: ... v8i8 -> v8i64, v8i8 -> v8i32, v4i8 -> v4i64, v4i16 -> v4i64 for AVX and AVX2. Bug 14865. llvm-svn: 172708	2013-01-17 09:59:53 +00:00
Elena Demikhovsky	14a4af0e66	Optimized load + SIGN_EXTEND patterns in the X86 backend. ... llvm-svn: 170506	2012-12-19 07:50:20 +00:00
Elena Demikhovsky	6c6cdec3de	cleaned line endings in the newly added test file ... llvm-svn: 155315	2012-04-22 13:22:48 +00:00
Elena Demikhovsky	8d7e56c409	ZERO_EXTEND/SIGN_EXTEND/TRUNCATE optimization for AVX2 ... llvm-svn: 155309	2012-04-22 09:39:03 +00:00