Object: Add IRObjectFile::getTargetTriple().

[pcc]

Summary

This lets us remove a use of IRObjectFile::getModule() in llvm-nm.

Depends on D27073

[mehdi_amini]

LGTM.

llvm/tools/llvm-nm/llvm-nm.cpp

273 ↗

(On Diff #79166)

A bit more concise:

auto TripleStr = IRobj->getTargetTriple()
if (TripleStr.empty)
  return false;
return Triple(TripleStr).isArch64Bit();

Or even:

auto TripleStr = IRobj->getTargetTriple()
return !TripleStr.empty() && Triple(TripleStr).isArch64Bit();

[pcc]

llvm/tools/llvm-nm/llvm-nm.cpp

273 ↗

(On Diff #79166)

In fact we don't need to test TripleStr for emptiness because isArch64Bit will return false given an empty triple. So I committed an even shorter version.