5 Commits

Author	SHA1	Message	Date
Nick Lewycky	59633cb478	When analyzing params/args for readnone/readonly, don't forget to consider that a pointer argument may be passed through a callsite to the return, and that we may need to analyze it. Fixes a bug reported on llvm-dev: http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-May/073098.html ... llvm-svn: 209870	2014-05-30 02:31:27 +00:00
Matt Arsenault	e55a2c2e6b	Make nocapture analysis work with addrspacecast ... llvm-svn: 199246	2014-01-14 19:11:52 +00:00
Nick Lewycky	c2ec0725ce	Extend 'readonly' and 'readnone' to work on function arguments as well as ... functions. Make the function attributes pass add it to known library functions and when it can deduce it. llvm-svn: 185735	2013-07-06 00:29:58 +00:00
Nick Lewycky	4c378a4453	Change CaptureTracking to pass a Use* instead of a Value* when a value is ... captured. This allows the tracker to look at the specific use, which may be especially interesting for function calls. Use this to fix 'nocapture' deduction in FunctionAttrs. The existing one does not iterate until a fixpoint and does not guarantee that it produces the same result regardless of iteration order. The new implementation builds up a graph of how arguments are passed from function to function, and uses a bottom-up walk on the argument-SCCs to assign nocapture. This gets us nocapture more often, and does so rather efficiently and independent of iteration order. llvm-svn: 147327	2011-12-28 23:24:21 +00:00
Nick Lewycky	854c869c36	Move this test from date-name to feature-name, and port it to FileCheck. ... llvm-svn: 147223	2011-12-23 18:41:31 +00:00