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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-01-26 22:59:28 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-01-26 22:59:28 +0000 |
| commit | fc9dce25f70ac4ba6975eb6d38a308adb2ad3816 (patch) | |
| tree | 88152b0e8c9887f3b27386b9210a35eca8fe377a /llvm/lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | d64c60e534d571a127806303dfeeec3d433c2ee5 (diff) | |
Handle call-clobbered ymm registers on Win64.
The Win64 calling convention has xmm6-15 as callee-saved while still
clobbering all ymm registers.
Add a YMM_HI_6_15 pseudo-register that aliases the clobbered part of the
ymm registers, and mark that as call-clobbered. This allows live xmm
registers across calls.
This hack wouldn't be necessary with RegisterMask operands representing
the call clobbers, but they are not quite operational yet.
llvm-svn: 149088
Diffstat (limited to 'llvm/lib/Bitcode/Reader/BitcodeReader.cpp')
0 files changed, 0 insertions, 0 deletions