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[SystemZ] Add patterns to load a constant into a high word (IIHF)

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Similar to low words, we can use the shorter LLIHL and LLIHH if it turns
out that the other half of the GR64 isn't live.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191750 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford
2013-10-01 13:02:28 +00:00
parent 441aeddd56
commit 4c8feae136
8 changed files with 116 additions and 5 deletions
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6
lib/Target/SystemZ/SystemZAsmPrinter.cpp
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@@ -82,6 +82,12 @@ void SystemZAsmPrinter::EmitInstruction(const MachineInstr *MI) {
.addImm(MI->getOperand(2).getImm());
break;
case SystemZ::IIHF64:
LoweredMI = MCInstBuilder(SystemZ::IIHF)
.addReg(SystemZMC::getRegAsGRH32(MI->getOperand(0).getReg()))
.addImm(MI->getOperand(2).getImm());
break;
case SystemZ::RISBHH:
case SystemZ::RISBHL:
LoweredMI = lowerRIEfLow(MI, SystemZ::RISBHG);