Shuxin Yang e0409098ae Fix a bug in Dead Argument Elimination. ... If a function seen at compile time is not necessarily the one linked to the binary being built, it is illegal to change the actual arguments passing to it. e.g. -------------------------- void foo(int lol) { // foo() has linkage satisifying isWeakForLinker() // "lol" is not used at all. } void bar(int lo2) { // xform to foo(undef) is illegal, as compiler dose not know which // instance of foo() will be linked to the the binary being built. foo(lol2); } ----------------------------- Such functions can be captured by isWeakForLinker(). NOTE that mayBeOverridden() is insufficient for this purpose as it dosen't include linkage types like AvailableExternallyLinkage and LinkOnceODRLinkage. Take link_odr* as an example, it indicates a set of *EQUIVALENT* globals that can be merged at link-time. However, the semantic of *EQUIVALENT*-functions includes parameters. Changing parameters breaks the assumption. Thank John McCall for help, especially for the explanation of subtle difference between linkage types. rdar://11546243 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192302 91177308-0d34-0410-b5e6-96231b3b80d8		2013-10-09 17:21:44 +00:00
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Hello	First check in. Modified a comment.	2013-09-27 07:36:10 +00:00
InstCombine	Pull fptrunc's upwards through selects when one of the select's selectands was a constant. This has a number of benefits, including producing small immediates (easier to materialize, smaller constant pools) as well as being more likely to allow the fptrunc to fuse with a preceding instruction (truncating selects are unusual).	2013-10-03 21:08:05 +00:00
Instrumentation	Remove the very substantial, largely unmaintained legacy PGO	2013-10-02 15:42:23 +00:00
IPO	Fix a bug in Dead Argument Elimination.	2013-10-09 17:21:44 +00:00
ObjCARC
Scalar	StructurizeCFG: Add dependency on LowerSwitch pass	2013-10-02 17:04:59 +00:00
Utils	UpdatePHINodes in BasicBlockUtils should not crash on duplicate predecessors	2013-10-04 23:41:05 +00:00
Vectorize	LoopVectorize: External uses must use the last value in a reduction cycle	2013-10-07 21:05:43 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile