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Commit 006e43bc authored by Sanjoy Das's avatar Sanjoy Das
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Check for stack space more intelligently.

libgcc sets the stack limit field in TCB to 256 bytes above the actual
allocated stack limit.  This means if the function's stack frame needs
less than 256 bytes, we can just compare the stack pointer with the
stack limit.  This should result in lesser calls to __morestack.

llvm-svn: 145766
parent 165ca1d4
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