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Author SHA1 Message Date
Akira Hatanaka 5acc58fcfb [stack protector] Look through bitcasts to get global variable 
__stack_chk_guard.

Handle the case where the pointer operand of the load instruction that loads the
stack guard is not a global variable but instead a bitcast.

%StackGuard = load i8** bitcast (i64** @__stack_chk_guard to i8**)
call void @llvm.stackprotector(i8* %StackGuard, i8** %StackGuardSlot)

Original test case provided by Ana Pazos.

This fixes PR20558.

llvm-svn: 215167
 2014-08-07 23:08:24 +00:00