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* Make RecursivelyDeleteDeadPHINode delete a phi node that has no users and add aNick Lewycky2011-02-201-43/+0
| | | | | | | | | test for that. With this change, test/CodeGen/X86/codegen-dce.ll no longer finds any instructions to DCE, so delete the test. Also renamed J and JP to I and IP in RecursivelyDeleteDeadPHINode. llvm-svn: 126088
* Run codegen dce pass for all targets at all optimization levels. Previously it'sEvan Cheng2010-02-061-0/+43
only run for x86 with fastisel. I've found it being very effective in eliminating some obvious dead code as result of formal parameter lowering especially when tail call optimization eliminated the need for some of the loads from fixed frame objects. It also shrinks a number of the tests. A couple of tests no longer make sense and are now eliminated. llvm-svn: 95493
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