Bruno Cardoso Lopes 3b86598cfa Instead of always leaving the work to the generic legalizer when ... there is no support for native 256-bit shuffles, be more smart in some cases, for example, when you can extract specific 128-bit parts and use regular 128-bit shuffles for them. Example: For this shuffle: shufflevector <4 x i64> %a, <4 x i64> %b, <4 x i32> <i32 1, i32 0, i32 7, i32 6> This was expanded to: vextractf128 $1, %ymm1, %xmm2 vpextrq $0, %xmm2, %rax vmovd %rax, %xmm1 vpextrq $1, %xmm2, %rax vmovd %rax, %xmm2 vpunpcklqdq %xmm1, %xmm2, %xmm1 vpextrq $0, %xmm0, %rax vmovd %rax, %xmm2 vpextrq $1, %xmm0, %rax vmovd %rax, %xmm0 vpunpcklqdq %xmm2, %xmm0, %xmm0 vinsertf128 $1, %xmm1, %ymm0, %ymm0 ret Now we get: vshufpd $1, %xmm0, %xmm0, %xmm0 vextractf128 $1, %ymm1, %xmm1 vshufpd $1, %xmm1, %xmm1, %xmm1 vinsertf128 $1, %xmm1, %ymm0, %ymm0 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137733 91177308-0d34-0410-b5e6-96231b3b80d8		2011-08-16 18:21:54 +00:00
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Analysis	A few places where we want to skip the landingpad instruction for insertion.	2011-08-16 04:52:55 +00:00
Archive	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
AsmParser	Move "atomic" and "volatile" designations on instructions after the opcode	2011-08-12 22:50:01 +00:00
Bitcode	Initial commit of the 'landingpad' instruction.	2011-08-12 20:24:12 +00:00
CodeGen	Remove unnecessary version check.	2011-08-16 17:41:41 +00:00
CompilerDriver	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
ExecutionEngine	EE: Provide the symbol "lseek64" explicitly with <unistd.h> on Linux glibc.	2011-08-14 00:34:04 +00:00
Linker	switch to the new struct api.	2011-08-12 18:07:26 +00:00
MC	MachOWriter: Don't crash on fixups with arithmetic, emit a relocation instead. This matches what as does.	2011-08-12 01:51:29 +00:00
Object	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
Support	Silence a bunch (but not all) "variable written but not read" warnings	2011-08-12 14:54:45 +00:00
Target	Instead of always leaving the work to the generic legalizer when	2011-08-16 18:21:54 +00:00
Transforms	Add a mechanism for optimisation plugins to register passes that all front ends can use without needing to be aware of the plugin (or the plugin be aware of the front end).	2011-08-16 13:58:41 +00:00
VMCore	Duncan pointed out that the LandingPadInst might read memory. (It might also	2011-08-15 21:14:31 +00:00
CMakeLists.txt	Build CompilerDriver library.	2011-03-12 22:01:42 +00:00
Makefile