[llvm-commits] [WinABI patch] Make sure to call __chkstk when appropriate

[Anton Korobeynikov]

Hello, Cameron

> Windows ABI requires the function prologue to call __chkstk if there is >= 4096 bytes allocated on the stack.
The patch is invalid due to many reasons:
 - It does the stuff in wrong place
 - It clobbers eax which can be incoming arg reg in case of inreg
params / fast CC
 - __chkstk is same as __alloca call in mingw case, which is already implemented

Also, I don't recall offhand, but iirc this call had some special CC,
it clobbers quite alot of regs, etc.

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University