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author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-16 10:55:47 +0000 |
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committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-08-16 10:55:47 +0000 |
commit | 6a079fef4fad3e6c2e07c9e1d0776e20a0b05b1e (patch) | |
tree | a9a17235ca1c2d7da4a78b31edb3aca2965731b5 /lib/Target/SystemZ/SystemZInstrInfo.cpp | |
parent | 6c51f89498dd813c8dd16e46069decf2897b31b2 (diff) | |
download | llvm-6a079fef4fad3e6c2e07c9e1d0776e20a0b05b1e.tar.gz llvm-6a079fef4fad3e6c2e07c9e1d0776e20a0b05b1e.tar.bz2 llvm-6a079fef4fad3e6c2e07c9e1d0776e20a0b05b1e.tar.xz |
[SystemZ] Fix handling of 64-bit memcmp results
Generalize r188163 to cope with return types other than MVT::i32, just
as the existing visitMemCmpCall code did. I've split this out into a
subroutine so that it can be used for other upcoming patches.
I also noticed that I'd used the wrong API to record the out chain.
It's a load that uses DAG.getRoot() rather than getRoot(), so the out
chain should go on PendingLoads. I don't have a testcase for that because
we don't do any interesting scheduling on z yet.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188540 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SystemZ/SystemZInstrInfo.cpp')
-rw-r--r-- | lib/Target/SystemZ/SystemZInstrInfo.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.cpp b/lib/Target/SystemZ/SystemZInstrInfo.cpp index f2e877fd29..a84ce28c51 100644 --- a/lib/Target/SystemZ/SystemZInstrInfo.cpp +++ b/lib/Target/SystemZ/SystemZInstrInfo.cpp @@ -339,7 +339,12 @@ static void eraseIfDead(MachineInstr *MI, const MachineRegisterInfo *MRI) { static bool removeIPMBasedCompare(MachineInstr *Compare, unsigned SrcReg, const MachineRegisterInfo *MRI, const TargetRegisterInfo *TRI) { + MachineInstr *LGFR = 0; MachineInstr *RLL = getDef(SrcReg, MRI); + if (RLL && RLL->getOpcode() == SystemZ::LGFR) { + LGFR = RLL; + RLL = getDef(LGFR->getOperand(1).getReg(), MRI); + } if (!RLL || !isShift(RLL, SystemZ::RLL, 31)) return false; @@ -362,6 +367,8 @@ static bool removeIPMBasedCompare(MachineInstr *Compare, unsigned SrcReg, } Compare->eraseFromParent(); + if (LGFR) + eraseIfDead(LGFR, MRI); eraseIfDead(RLL, MRI); eraseIfDead(SRL, MRI); eraseIfDead(IPM, MRI); |