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Andrea Di Biagio 3957d4245f [X86] Improve the lowering of BITCAST from MVT::f64 to MVT::v4i16/MVT::v8i8. 
This patch teaches the x86 backend how to efficiently lower ISD::BITCAST dag
nodes from MVT::f64 to MVT::v4i16 (and vice versa), and from MVT::f64 to
MVT::v8i8 (and vice versa).

This patch extends the logic from revision 208107 to also handle MVT::v4i16
and MVT::v8i8. Also, this patch correctly propagates Undef values when
performing the widening of a vector (example: when widening from v2i32 to
v4i32, the upper 64bits of the resulting vector are 'undef').



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209451 91177308-0d34-0410-b5e6-96231b3b80d8
2014-05-22 16:21:39 +00:00
..
Analysis Fix a bug in SCEV's backedge taken count computation from my prior fix in Jan. 2014-05-22 00:37:03 +00:00
Assembler Fix most of PR10367. 2014-05-16 19:35:39 +00:00
Bindings
Bitcode Add 'nonnull', a new parameter and return attribute which indicates that the pointer is not null. Instcombine will elide comparisons between these and null. Patch by Luqman Aden! 2014-05-20 01:23:40 +00:00
BugPoint
CodeGen [X86] Improve the lowering of BITCAST from MVT::f64 to MVT::v4i16/MVT::v8i8. 2014-05-22 16:21:39 +00:00
DebugInfo Revert "DebugInfo: Don't put fission type units in comdat sections." 2014-05-21 23:27:41 +00:00
ExecutionEngine Fix testers by removing dubious testcase for r209154. 2014-05-19 19:38:48 +00:00
Feature Fix most of PR10367. 2014-05-16 19:35:39 +00:00
FileCheck
Instrumentation [asan] Set debug location in ASan function prologue. 2014-05-14 10:30:15 +00:00
Integer
JitListener
Linker LTO: Add a testcase for linking modules with incompatible Debug Info 2014-05-19 23:41:25 +00:00
LTO IR: Don't allow non-default visibility on local linkage 2014-05-07 22:57:20 +00:00
MC ARM64: separate load/store operands to simplify assembler 2014-05-22 11:56:09 +00:00
Object Update MachOObjectFile::getSymbolAddress so it returns UnknownAddressOrSize 2014-05-20 23:04:47 +00:00
Other Fix most of PR10367. 2014-05-16 19:35:39 +00:00
TableGen test/TableGen: Remove XFAIL:vg_leak out of 3 tests corresponding to r208293. 2014-05-09 08:18:33 +00:00
tools ProfileData: Allow multiple profiles in RawInstrProfReader 2014-05-16 00:38:00 +00:00
Transforms Add support for missed and analysis optimization remarks. 2014-05-22 14:19:46 +00:00
Unit
Verifier Add comdat key field to llvm.global_ctors and llvm.global_dtors 2014-05-16 20:39:27 +00:00
YAMLParser
.clang-format
CMakeLists.txt OK, NAKAMURA Takumi beat me to this change. So backing out my addition of 2014-05-19 23:26:51 +00:00
lit.cfg [Test] Remove c-index-test from the list of substitutions 2014-05-07 18:16:02 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh