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Expand on my note-to-self
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12029 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -14,7 +14,9 @@
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// FIXME: This could be extended for a very simple form of mod/ref information.
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// If a pointer is locally allocated (either malloc or alloca) and never passed
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// into a call or stored to memory, then we know that calls will not mod/ref the
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// memory. This can be important for tailcallelim.
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// memory. This can be important for tailcallelim, and can support CSE of loads
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// and dead store elimination across calls. This is particularly important for
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// stack allocated arrays.
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//
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//===----------------------------------------------------------------------===//
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