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Simon Pilgrim b9a35123dc [SLPVectorizer] Add initial alternate opcode support for cast instructions. (REAPPLIED-2)
We currently only support binary instructions in the alternate opcode shuffles.

This patch is an initial attempt at adding cast instructions as well, this raises several issues that we probably want to address as we continue to generalize the alternate mechanism:

1 - Duplication of cost determination - we should probably add scalar/vector costs helper functions and get BoUpSLP::getEntryCost to use them instead of determining costs directly.
2 - Support alternate instructions with the same opcode (e.g. casts with different src types) - alternate vectorization of calls with different IntrinsicIDs will require this.
3 - Allow alternates to be a different instruction type - mixing binary/cast/call etc.
4 - Allow passthrough of unsupported alternate instructions - related to PR30787/D28907 'copyable' elements.

Reapplied with fix to only accept 2 different casts if they come from the same source type (PR38154).

Differential Revision: https://reviews.llvm.org/D49135

llvm-svn: 336989
2018-07-13 11:09:52 +00:00
bindings [LLVM-C] [OCaml] Remove LLVMAddBBVectorizePass 2018-05-28 16:58:10 +00:00
cmake [CMake] Teach the build system to codesign built products 2018-07-10 17:32:48 +00:00
docs [FileCheck] Implement -v and -vv for tracing matches 2018-07-13 03:08:23 +00:00
examples [ORC] Update JITCompileCallbackManager to support multi-threaded code. 2018-05-30 01:57:45 +00:00
include [XRay][compiler-rt] Add PID field to llvm-xray tool and add PID metadata record entry in FDR mode 2018-07-13 05:38:22 +00:00
lib [SLPVectorizer] Add initial alternate opcode support for cast instructions. (REAPPLIED-2) 2018-07-13 11:09:52 +00:00
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runtimes [CMake] Set per-runtime library directory suffix in runtimes build 2018-07-10 19:13:33 +00:00
test [SLPVectorizer] Add initial alternate opcode support for cast instructions. (REAPPLIED-2) 2018-07-13 11:09:52 +00:00
tools [llvm-mca] Simplify the Pipeline constructor. NFC 2018-07-13 09:31:02 +00:00
unittests [DomTreeUpdater] Ignore updates when both DT and PDT are nullptrs 2018-07-13 04:02:13 +00:00
utils [UpdateTestChecks] Teach the x86 asm parser to skip over the function 2018-07-13 10:29:23 +00:00
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.gitattributes [DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. 2018-05-09 02:40:45 +00:00
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CODE_OWNERS.TXT CODE_OWNERS: Take ownership of the MIPS backend 2018-06-21 09:59:44 +00:00
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CREDITS.TXT Update my information in the CREDITS file. 2018-06-15 20:02:11 +00:00
LICENSE.TXT Update copyright year to 2018. 2018-06-18 12:22:17 +00:00
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