Generate native unwind info on Win64

Description

Generate native unwind info on Win64

This patch enables LLVM to emit Win64-native unwind info rather than
DWARF CFI. It handles all corner cases (I hope), including stack
realignment.

Because the unwind info is not flexible enough to describe stack frames
with a gap of unknown size in the middle, such as the one caused by
stack realignment, I modified register spilling code to place all spills
into the fixed frame slots, so that they can be accessed relative to the
frame pointer.

Patch by Vadim Chugunov!

Reviewed By: rnk

Differential Revision: http://reviews.llvm.org/D4081

Details

Auditors
grosbach
Committed
rnkJun 20 2014, 1:35 PM
Reviewer
rnk
Differential Revision
D4081: Generate SEH unwinding info on Win64
Parents
rL211398: C++ status page: restore the convention of saying "SVN" until we reach a…
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