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
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Analysis	Refine memory dependence's notion of volatile semantics	2015-01-26 18:54:27 +00:00
AsmParser	AsmParser: PARSE_MD_FIELD() => ParseMDField(), NFC	2015-01-20 02:42:29 +00:00
Bitcode	[Bitcode] Diagnose errors instead of asserting from bad input	2015-01-24 04:15:05 +00:00
CodeGen	Revert GCStrategy ownership changes	2015-01-26 18:26:35 +00:00
DebugInfo	[cleanup] Re-sort all the #include lines in LLVM using	2015-01-14 11:23:27 +00:00
ExecutionEngine	OrcJIT: Avoid non-static initializers.	2015-01-25 11:41:49 +00:00
IR	Revert GCStrategy ownership changes	2015-01-26 18:26:35 +00:00
IRReader	Remove unused variable. NFC.	2014-11-06 23:16:57 +00:00
LineEditor	[CMake] Use LINK_LIBS instead of target_link_libraries().	2014-02-26 06:41:29 +00:00
Linker	[llvm link] Destroy ConstantArrays in LLVMContext if they are not used.	2015-01-20 19:24:59 +00:00
LTO	[PM] Rework how the TargetLibraryInfo pass integrates with the new pass	2015-01-24 02:06:09 +00:00
MC	Store the passed in CPU name string so that it can be accessed later.	2015-01-26 17:33:30 +00:00
Object	[ELFYAML] Support mips64 relocation record format in yaml2obj/obj2yaml	2015-01-25 13:29:25 +00:00
Option	[cleanup] Re-sort all the #include lines in LLVM using	2015-01-14 11:23:27 +00:00
ProfileData	llvm-cov: Only combine segments if they overlap exactly	2015-01-24 20:58:52 +00:00
Support	Teach raw_ostream to support hex formatting without a prefix '0x'.	2015-01-26 18:21:33 +00:00
TableGen	Replace size method call of containers to empty method where appropriate	2015-01-15 11:41:30 +00:00
Target	Model sqrtsd as a binary operation with one source operand tied to the destination (PR14221)	2015-01-26 18:42:16 +00:00
Transforms	SLPVectorizer: fix wrong scheduling of atomic load/stores.	2015-01-26 09:07:04 +00:00
CMakeLists.txt	ProfileData: Introduce the InstrProfReader interface and a text reader	2014-03-21 17:24:48 +00:00
LLVMBuild.txt	ProfileData: Introduce the InstrProfReader interface and a text reader	2014-03-21 17:24:48 +00:00
Makefile	ProfileData: Introduce the InstrProfReader interface and a text reader	2014-03-21 17:24:48 +00:00