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66649e00c9
llvm-6502/lib
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Ahmed Bougacha 66649e00c9 [CodeGen] Combine concat_vector of trunc'd scalar to scalar_to_vector. 
We already do:
  concat_vectors(scalar, undef) -> scalar_to_vector(scalar)
When the scalar is legal.
When it's not, but is a truncated legal scalar, we can also do:
  concat_vectors(trunc(scalar), undef) -> scalar_to_vector(scalar)
Which is equivalent, since the upper lanes are undef anyway.
While there, teach the combine to look at more than 2 operands.

Differential Revision: http://reviews.llvm.org/D8883


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234530 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-09 20:04:47 +00:00
..
Analysis [LoopAccesses] Allow analysis to complete in the presence of uniform stores 2015-04-08 17:48:40 +00:00
AsmParser DebugInfo: Move DIFlag-related API from DIDescriptor to DebugNode 2015-04-07 01:21:40 +00:00
Bitcode IR: Remove MDTupleTypedArrayWrapper::operator MDTuple*() 2015-04-07 16:50:39 +00:00
CodeGen [CodeGen] Combine concat_vector of trunc'd scalar to scalar_to_vector. 2015-04-09 20:04:47 +00:00
DebugInfo Raising minimum required CMake version to 2.8.12.2. 2015-03-23 20:03:57 +00:00
ExecutionEngine [jitlistener] Remove unused code 2015-04-08 13:17:48 +00:00
Fuzzer Removing a spurious space; NFC. 2015-04-06 16:09:13 +00:00
IR IR: Preserve use-list order by default in bitcode 2015-04-09 17:41:20 +00:00
IRReader
LineEditor
Linker IR: Stop using DIDescriptor::is*() and auto-casting 2015-04-06 23:18:49 +00:00
LTO This reverts commit r234460 and r234461. 2015-04-09 15:54:59 +00:00
MC Define a function with "... llvm::func...". 2015-04-09 18:08:15 +00:00
Object Remove more superfluous .str() and replace std::string concatenation with Twine. 2015-03-30 15:42:36 +00:00
Option Remove more superfluous .str() and replace std::string concatenation with Twine. 2015-03-30 15:42:36 +00:00
Passes [PM] Fixup for r231556 where I missed a dependency on intrinsics 2015-03-07 09:08:20 +00:00
ProfileData Re-sort includes with sort-includes.py and insert raw_ostream.h where it's used. 2015-03-23 19:32:43 +00:00
Support Misc cleanup. NFC. 2015-04-09 16:59:07 +00:00
TableGen
Target [AArch64][FastISel] Fix integer extend optimization. 2015-04-09 20:00:46 +00:00
Transforms Eliminate O(n^2) worst-case behavior in SSA construction 2015-04-08 18:26:20 +00:00
CMakeLists.txt [PM] Create a separate library for high-level pass management code. 2015-03-07 09:02:36 +00:00
LLVMBuild.txt [PM] Create a separate library for high-level pass management code. 2015-03-07 09:02:36 +00:00
Makefile [PM] Create a separate library for high-level pass management code. 2015-03-07 09:02:36 +00:00