Philip Reames cce3c83917 Refine memory dependence's notion of volatile semantics ... According to my reading of the LangRef, volatiles are only ordered with respect to other volatiles. It is entirely legal and profitable to forward unrelated loads over the volatile load. This patch implements this for GVN by refining the transition rules MemoryDependenceAnalysis uses when encountering a volatile. The added test cases show where the extra flexibility is profitable for local dependence optimizations. I have a related change (227110) which will extend this to non-local dependence (i.e. PRE), but that's essentially orthogonal to the semantic change in this patch. I have tested the two together and can confirm that PRE works over a volatile load with both changes. I will be submitting a PRE w/volatiles test case seperately in the near future. Differential Revision: http://reviews.llvm.org/D6901 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227112 91177308-0d34-0410-b5e6-96231b3b80d8		2015-01-26 18:54:27 +00:00
..
Analysis	Fix incorrect partial aliasing	2015-01-26 17:31:17 +00:00
Assembler	IR: Update references to temporaries before deleting	2015-01-22 21:36:45 +00:00
Bindings	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
Bitcode	[Bitcode] Diagnose errors instead of asserting from bad input	2015-01-24 04:15:05 +00:00
BugPoint	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
CodeGen	Model sqrtsd as a binary operation with one source operand tied to the destination (PR14221)	2015-01-26 18:42:16 +00:00
DebugInfo	Debug info: Fix PR22296 by omitting the DW_AT_location if we lost the	2015-01-25 19:04:08 +00:00
ExecutionEngine	Remove a few more redundant ExecutionEngine regression tests.	2015-01-24 22:41:13 +00:00
Feature	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
FileCheck
Instrumentation	[msan] Update origin for the entire destination range on memory store.	2015-01-21 13:21:31 +00:00
Integer
JitListener	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
Linker	IR: Move MDLocation into place	2015-01-14 22:27:36 +00:00
LTO
MC	Move the Mips target to storing the ABI in the TargetMachine rather	2015-01-26 17:33:46 +00:00
Object	[ELFYAML] Support mips64 relocation record format in yaml2obj/obj2yaml	2015-01-25 13:29:25 +00:00
Other	If we see UTF-8 BOM sequence at the beginning of a response file, we shall	2015-01-24 04:23:08 +00:00
SymbolRewriter
TableGen
tools	Fix the problem with llvm-objdump and -archive-headers in printing the archive header size field.	2015-01-23 21:02:44 +00:00
Transforms	Refine memory dependence's notion of volatile semantics	2015-01-26 18:54:27 +00:00
Unit
Verifier
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg
lit.site.cfg.in	Reverting r226937: lit: Make MCJIT's supported arch check case insensitive	2015-01-24 01:42:44 +00:00
Makefile
Makefile.tests
TestRunner.sh