When fp is not eliminated, instructions with T2_i12 modes will be changed to T2_i8 ones. Take that into consideration when determining stack size limit for reserving register scavenging slot.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77642 91177308-0d34-0410-b5e6-96231b3b80d8
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