Evan Cheng 400073d546 On recent Intel u-arch's, folding loads into some unary SSE instructions can ... be non-optimal. To be precise, we should avoid folding loads if the instructions only update part of the destination register, and the non-updated part is not needed. e.g. cvtss2sd, sqrtss. Unfolding the load from these instructions breaks the partial register dependency and it can improve performance. e.g. movss (%rdi), %xmm0 cvtss2sd %xmm0, %xmm0 instead of cvtss2sd (%rdi), %xmm0 An alternative method to break dependency is to clear the register first. e.g. xorps %xmm0, %xmm0 cvtss2sd (%rdi), %xmm0 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91672 91177308-0d34-0410-b5e6-96231b3b80d8		2009-12-18 07:40:29 +00:00
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Analysis	gvn is optimizing this better now.	2009-12-06 04:16:05 +00:00
Archive
Assembler
Bindings/Ocaml
Bitcode
BugPoint
CodeGen	On recent Intel u-arch's, folding loads into some unary SSE instructions can	2009-12-18 07:40:29 +00:00
DebugInfo	XFAIL on ppc-darwin.	2009-12-16 02:11:38 +00:00
ExecutionEngine	Remove test. Execution tests are slow and generally not worth it.	2009-11-08 02:23:15 +00:00
Feature	add bitcode reader support for blockaddress. We can now fully	2009-10-28 05:53:48 +00:00
FrontendAda
FrontendC	Test case for 90787.	2009-12-07 19:42:22 +00:00
FrontendC++	Fix this code to use DIScope instead of DICompileUnit, as in r90181.	2009-12-05 00:23:29 +00:00
FrontendFortran
FrontendObjC	Remove now-redundant llvm-as invocations.	2009-12-05 00:02:37 +00:00
FrontendObjC++
Integer
lib
Linker
LLVMC	Add a 'set_option' action for use in OptionPreprocessor.	2009-12-17 07:49:16 +00:00
MC
Other
Scripts
TableGen	Fix pr5470. Tablegen handles template arguments by temporarily setting their	2009-11-22 03:58:57 +00:00
Transforms	Allow instcombine to combine "sext(a) >u const" to "a >u trunc(const)".	2009-12-17 22:42:29 +00:00
Unit	CMake/lit: Add llvm_{unit_,}site_config parameters, and always pass them when running tests from the project files.	2009-12-08 19:47:36 +00:00
Verifier
CMakeLists.txt	CMake/lit: Add llvm_{unit_,}site_config parameters, and always pass them when running tests from the project files.	2009-12-08 19:47:36 +00:00
lit.cfg	CMake/lit: Add llvm_{unit_,}site_config parameters, and always pass them when running tests from the project files.	2009-12-08 19:47:36 +00:00
lit.site.cfg.in
Makefile	Revert the test from r88984. It relies on being able to mmap 16GB of	2009-11-16 23:32:30 +00:00
Makefile.tests
site.exp.in	Two small fixes for site.exp for cmake.	2009-11-08 09:29:52 +00:00
TestRunner.sh