llvm-project

Author	SHA1	Message	Date
Nadav Rotem	7b7585d153	Revert 179071 because it is not the right way to support non standard new/new[] operators. llvm-svn: 179084	2013-04-09 04:43:46 +00:00
Nadav Rotem	9dd90ac5b4	c++ new operators are not malloc-like functions because they do not return uninitialized memory. Users may overide new-operators and implement any function that they like. llvm-svn: 179071	2013-04-08 23:40:47 +00:00
Nuno Lopes	fa0dffccee	teach instcombine to remove allocated buffers even if there are stores, memcpy/memmove/memset, and objectsize users. This means we can do cheap DSE for heap memory. Nothing is done if the pointer excapes or has a load. The churn in the tests is mostly due to objectsize, since we want to make sure we don't delete the malloc call before evaluating the objectsize (otherwise it becomes -1/0) llvm-svn: 159876	2012-07-06 23:09:25 +00:00
Nuno Lopes	771e7bd4ba	instcombine: disable optimization of 'invoke null/undef'. I'll move this functionality to SimplifyCFG (since we cannot make changes to the CFG here). Fixes the crashes with the attached test case llvm-svn: 158951	2012-06-21 23:52:14 +00:00