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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-10-16 11:10:55 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-10-16 11:10:55 +0000 |
| commit | d1a4f579bf45aec933c79292b6b9663581438738 (patch) | |
| tree | 4da52c699044d9938c699425da7148601d5e89d8 /lib/Target/SystemZ/SystemZ.h | |
| parent | 5d7e93c0d44a96a416d2f1d1518954d8fed73f40 (diff) | |
| download | llvm-d1a4f579bf45aec933c79292b6b9663581438738.tar.gz llvm-d1a4f579bf45aec933c79292b6b9663581438738.tar.bz2 llvm-d1a4f579bf45aec933c79292b6b9663581438738.tar.xz | |
[SystemZ] Improve handling of SETCC
We previously used the default expansion to SELECT_CC, which in turn would
expand to "LHI; BRC; LHI". In most cases it's better to use an IPM-based
sequence instead.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192784 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/SystemZ.h')
| -rw-r--r-- | lib/Target/SystemZ/SystemZ.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZ.h b/lib/Target/SystemZ/SystemZ.h index 4a6b4db9d6..dcebbad590 100644 --- a/lib/Target/SystemZ/SystemZ.h +++ b/lib/Target/SystemZ/SystemZ.h @@ -68,6 +68,9 @@ namespace llvm { const unsigned CCMASK_TM_MSB_1 = CCMASK_2 | CCMASK_3; const unsigned CCMASK_TM = CCMASK_ANY; + // The position of the low CC bit in an IPM result. + const unsigned IPM_CC = 28; + // Mask assignments for PFD. const unsigned PFD_READ = 1; const unsigned PFD_WRITE = 2; |