Chandler Carruth baf868b9b8 Switch this code away from Value::isUsedInBasicBlock. That code either ... loops over instructions in the basic block or the use-def list of the value, neither of which are really efficient when repeatedly querying about values in the same basic block. What's more, we already know that the CondBB is small, and so we can do a much more efficient test by counting the uses in CondBB, and seeing if those account for all of the uses. Finally, we shouldn't blanket fail on any such instruction, instead we should conservatively assume that those instructions are part of the cost. Note that this actually fixes a bug in the pass because isUsedInBasicBlock has a really terrible bug in it. I'll fix that in my next commit, but the fix for it would make this code suddenly take the compile time hit I thought it already was taking, so I wanted to go ahead and migrate this code to a faster & better pattern. The bug in isUsedInBasicBlock was also causing other tests to test the wrong thing entirely: for example we weren't actually disabling speculation for floating point operations as intended (and tested), but the test passed because we failed to speculate them due to the isUsedInBasicBlock failure. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173417 91177308-0d34-0410-b5e6-96231b3b80d8		2013-01-25 05:40:09 +00:00
..
Hello	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
InstCombine	Remove trailing whitespace.	2013-01-24 05:22:40 +00:00
Instrumentation	[asan] fix 32-bit builds	2013-01-24 10:43:50 +00:00
IPO	Add the IR attribute 'sspstrong'.	2013-01-23 06:41:41 +00:00
Scalar	Added comment to ObjCARC elaborating what is meant by the term 'Provenance' in 'Provenance Analysis'.	2013-01-24 21:35:00 +00:00
Utils	Switch this code away from Value::isUsedInBasicBlock. That code either	2013-01-25 05:40:09 +00:00
Vectorize	Add support for reverse pointer induction variables. These are loops that contain pointers that count backwards.	2013-01-23 01:35:00 +00:00
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