win64: Call __chkstk through a register with the large code model
Fixes half of PR18582. True dynamic allocas will still have a
CALL64pcrel32 which will fail.
Differential D7267
Update comments to use unreachable instead of llvm.trap, as implemented now Authored by rnk on Jan 29 2015, 2:24 PM.
Details win64: Call __chkstk through a register with the large code model Fixes half of PR18582. True dynamic allocas will still have a
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