David Majnemer 6cd35912c0 [CodeGen] Don't UBSan-ize the argument to __builtin_frame_address ...

__builtin_frame_address requires its argument to be a constant
expression which already implies that it cannot have undefined behavior.
However, we used EmitScalarExpr to emit the argument causing UBSan to
try to check for overflow.

Instead, use the constant expression emission system.

This fixes PR24256.

llvm-svn: 243206

2015-07-25 05:57:24 +00:00

2.7 KiB

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