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[SystemZ] Use SRST to implement strlen and strnlen

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It would also make sense to use it for memchr; I'm working on that now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188547 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford
2013-08-16 11:41:43 +00:00
parent 4fc7355a21
commit 19262ee072
14 changed files with 236 additions and 1 deletions
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3
lib/Target/SystemZ/SystemZISelLowering.cpp
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@@ -1704,6 +1704,7 @@ const char *SystemZTargetLowering::getTargetNodeName(unsigned Opcode) const {
OPCODE(CLC);
OPCODE(STRCMP);
OPCODE(STPCPY);
OPCODE(SEARCH_STRING);
OPCODE(IPM);
OPCODE(ATOMIC_SWAPW);
OPCODE(ATOMIC_LOADW_ADD);
@@ -2554,6 +2555,8 @@ EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const {
return emitStringWrapper(MI, MBB, SystemZ::CLST);
case SystemZ::MVSTLoop:
return emitStringWrapper(MI, MBB, SystemZ::MVST);
case SystemZ::SRSTLoop:
return emitStringWrapper(MI, MBB, SystemZ::SRST);
default:
llvm_unreachable("Unexpected instr type to insert");
}