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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-05 11:03:20 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-05 11:03:20 +0000 |
| commit | 9b05c709c65ba05645853ca49bc2a1ea8b554f37 (patch) | |
| tree | c04c8f0d7f35c746616d7099f030b0ae55cc6a35 /lib/Target/SystemZ/SystemZInstrInfo.h | |
| parent | 0e4044c233d10596578df35bae2483fbe4e8a507 (diff) | |
| download | llvm-9b05c709c65ba05645853ca49bc2a1ea8b554f37.tar.gz llvm-9b05c709c65ba05645853ca49bc2a1ea8b554f37.tar.bz2 llvm-9b05c709c65ba05645853ca49bc2a1ea8b554f37.tar.xz | |
[SystemZ] Use LOAD AND TEST to eliminate comparisons against zero
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187720 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/SystemZInstrInfo.h')
| -rw-r--r-- | lib/Target/SystemZ/SystemZInstrInfo.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.h b/lib/Target/SystemZ/SystemZInstrInfo.h index 763a3956fc..1392745672 100644 --- a/lib/Target/SystemZ/SystemZInstrInfo.h +++ b/lib/Target/SystemZ/SystemZInstrInfo.h @@ -193,6 +193,10 @@ public: // exists. unsigned getOpcodeForOffset(unsigned Opcode, int64_t Offset) const; + // If Opcode is a load instruction that has a LOAD AND TEST form, + // return the opcode for the testing form, otherwise return 0. + unsigned getLoadAndTest(unsigned Opcode) const; + // Return true if ROTATE AND ... SELECTED BITS can be used to select bits // Mask of the R2 operand, given that only the low BitSize bits of Mask are // significant. Set Start and End to the I3 and I4 operands if so. |