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Ahmed Bougacha ac655060b4 [ARM] Look through concat when lowering in-place shuffles (VZIP, ..) 
Currently, we canonicalize shuffles that produce a result larger than
their operands with:
  shuffle(concat(v1, undef), concat(v2, undef))
->
  shuffle(concat(v1, v2), undef)

because we can access quad vectors (see PerformVECTOR_SHUFFLECombine).

This is useful in the general case, but there are special cases where
native shuffles produce larger results: the two-result ops.

We can look through the concat when lowering them:
  shuffle(concat(v1, v2), undef)
->
  concat(VZIP(v1, v2):0, :1)

This lets us generate the native shuffles instead of scalarizing to
dozens of VMOVs.

Differential Revision: http://reviews.llvm.org/D10424


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240118 91177308-0d34-0410-b5e6-96231b3b80d8
2015-06-19 02:32:35 +00:00
..
Analysis [X86][SSE][CostModel] Fixed uitofp/sitofp cost target tests to specify sse2/avx2/avx512f directly instead of via a cpu model. 2015-06-18 21:26:01 +00:00
Assembler Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
Bindings
Bitcode Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
BugPoint
CodeGen [ARM] Look through concat when lowering in-place shuffles (VZIP, ..) 2015-06-19 02:32:35 +00:00
DebugInfo Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
ExecutionEngine Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
Feature Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
FileCheck
Instrumentation Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
Integer
JitListener
Linker Changed renaming of local symbols by inserting a dot vefore the numeric suffix. 2015-05-12 16:47:30 +00:00
LTO Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
MC Improve the --expand-relocs handling of MachO. 2015-06-18 22:38:20 +00:00
Object Object: Prepend __imp_ when mangling a dllimport symbol in IRObjectFile. 2015-06-11 21:42:18 +00:00
Other Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
SymbolRewriter
TableGen Use std::bitset for SubtargetFeatures. 2015-05-26 10:47:10 +00:00
tools Improve the --expand-relocs handling of MachO. 2015-06-18 22:38:20 +00:00
Transforms Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
Unit
Verifier Move the personality function from LandingPadInst to Function 2015-06-17 20:52:32 +00:00
YAMLParser YAML: Implement block scalar parsing. 2015-05-13 23:10:51 +00:00
.clang-format
CMakeLists.txt LibDriver, llvm-lib: introduce. 2015-06-09 21:50:22 +00:00
lit.cfg LibDriver, llvm-lib: introduce. 2015-06-09 21:50:22 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh