Changes in vec-perm-05.ll

80b3af7a - [SystemZ] Add CodeGen support for v4f32

Tue, 05 May 2015 19:27:45 +0000

[SystemZ] Add CodeGen support for v4f32The architecture doesn't really have any native v4f32 operations exceptv4f32->v2f64 and v2f64->v4f32 conversions, with only half of the v4f32elements being used. Even so, using vector registers for <4 x float>and scalarising individual operations is much better than generatingcompletely scalar code, since there's much less register pressure.It's also more efficient to do v4f32 comparisons by extending to 2v2f64s, comparing those, then packing the result.This particularly helps with llvmpipe.Based on a patch by Richard Sandiford.llvm-svn: 236523 List of files: /llvm-project-15.0.7/llvm/test/CodeGen/SystemZ/vec-perm-05.ll

cd808237 - [SystemZ] Add CodeGen support for v2f64

Tue, 05 May 2015 19:26:48 +0000

[SystemZ] Add CodeGen support for v2f64This adds ABI and CodeGen support for the v2f64 type, which is nativelysupported by z13 instructions.Based on a patch by Richard Sandiford.llvm-svn: 236522 List of files: /llvm-project-15.0.7/llvm/test/CodeGen/SystemZ/vec-perm-05.ll

ce4c1095 - [SystemZ] Add CodeGen support for integer vector types

Tue, 05 May 2015 19:25:42 +0000

[SystemZ] Add CodeGen support for integer vector typesThis the first of a series of patches to add CodeGen support exploitingthe instructions of the z13 vector facility. This patch adds supportfor the native integer vector types (v16i8, v8i16, v4i32, v2i64).When the vector facility is present, we default to the new vector ABI.This is characterized by two major differences:- Vector types are passed/returned in vector registers (except for unnamed arguments of a variable-argument list function).- Vector types are at most 8-byte aligned.The reason for the choice of 8-byte vector alignment is that the hardwareis able to efficiently load vectors at 8-byte alignment, and the ABI onlyguarantees 8-byte alignment of the stack pointer, so requiring any higheralignment for vectors would require dynamic stack re-alignment code.However, for compatibility with old code that may use vector types, when*not* using the vector facility, the old alignment rules (vector typesare naturally aligned) remain in use.These alignment rules are not only implemented at the C language level(implemented in clang), but also at the LLVM IR level. This is doneby selecting a different DataLayout string depending on whether thevector ABI is in effect or not.Based on a patch by Richard Sandiford.llvm-svn: 236521 List of files: /llvm-project-15.0.7/llvm/test/CodeGen/SystemZ/vec-perm-05.ll