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1031549bec
For large stack offsets the compiler generates multiple immediate mode sub/add instructions in the prologue/epilogue. This patch makes the compiler place the final amount to be added/subtracted into a register, which is then added/substracted with a single operation. Differential Revision: http://reviews.llvm.org/D7226 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227458 91177308-0d34-0410-b5e6-96231b3b80d8
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