8 Commits

Author	SHA1	Message	Date
Benjamin Kramer	701e41bb58	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	8ed652c269	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	087fe129d8	Cleanup: test source files do not need to be executable ... llvm-svn: 180003	2013-04-22 08:02:43 +00:00
Nadav Rotem	94213533f7	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	461c2bd18c	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	12a5e01a52	Optimized load + SIGN_EXTEND patterns in the X86 backend. ... llvm-svn: 170506	2012-12-19 07:50:20 +00:00
Elena Demikhovsky	587ea8d3fc	cleaned line endings in the newly added test file ... llvm-svn: 155315	2012-04-22 13:22:48 +00:00
Elena Demikhovsky	35721fc4f8	ZERO_EXTEND/SIGN_EXTEND/TRUNCATE optimization for AVX2 ... llvm-svn: 155309	2012-04-22 09:39:03 +00:00