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2f0f9a6973
use too much stack space, overflowing the stack for large functions. Instead of emitting new SDOperands in each match block, we emit some common ones at the top of SelectCode then reuse them when possible. This reduces the stack size of SelectCode from 28K to 21K. Note that GCC compiles it to 512 bytes :-/ I've filed GCC PR 25505 to track this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24882 91177308-0d34-0410-b5e6-96231b3b80d8
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