Chris Lattner fb837dccac In the common case where we are shuffling a vector, emit an ... llvm vector shuffle instead of a bunch of insert/extract operations. For: vec4 = vec4.yyyy; // splat Emit: %tmp1 = shufflevector <4 x float> %tmp, <4 x float> undef, <4 x i32> < i32 1, i32 1, i32 1, i32 1 > instead of: %tmp1 = extractelement <4 x float> %tmp, i32 1 %tmp2 = insertelement <4 x float> undef, float %tmp1, i32 0 %tmp3 = extractelement <4 x float> %tmp, i32 1 %tmp4 = insertelement <4 x float> %tmp2, float %tmp3, i32 1 %tmp5 = extractelement <4 x float> %tmp, i32 1 %tmp6 = insertelement <4 x float> %tmp4, float %tmp5, i32 2 %tmp7 = extractelement <4 x float> %tmp, i32 1 %tmp8 = insertelement <4 x float> %tmp6, float %tmp7, i32 3 llvm-svn: 40779		2007-08-03 16:09:33 +00:00
clang	In the common case where we are shuffling a vector, emit an	2007-08-03 16:09:33 +00:00
llvm	Fix a subtle iterator invalidation bug in a recursive algorithm.	2007-08-03 11:03:26 +00:00