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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-05-09 22:15:00 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-05-09 22:15:00 +0000 |
| commit | ca313e1efa98910a7a5e7f4bf2ac1a70adb6e4fe (patch) | |
| tree | 494cae81f83bb8297bb53ec1ec62d966da05aec3 /lib/Transforms | |
| parent | da2be824346c316c6fc840de7b8493e3d587e785 (diff) | |
Compute a backwards SubReg -> SubRegIndex map for each register.
This mapping is for internal use by TableGen. It will not be exposed in
the generated files.
Unfortunately, the mapping is not completely well-defined. The X86 xmm
registers appear with multiple sub-register indices in the ymm
registers. This is because of the odd idempotent sub_sd and sub_ss
sub-register indices. I hope to be able to eliminate them entirely, so
we can require the sub-registers to form a tree.
For now, just place the canonical sub_xmm index in the mapping, and
ignore the idempotents.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156519 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
0 files changed, 0 insertions, 0 deletions