Daniel Dunbar 230e1541b3 IRgen: Move EmitStoreThroughBitfieldLValue to use new CGBitfieldInfo::AccessInfo decomposition, instead of computing the access policy itself. ...

- Sadly, this doesn't seem to give any .ll size win so far. It is possible to make this routine significantly smarter & avoid various shifting, masking, and zext/sext, but I'm not really convinced it is worth it. It is tricky, and this is really instcombine's job.

 - No intended functionality change; the test case is just to increase coverage & serves as a demo file, it worked before this commit.

llvm-svn: 101222

2010-04-14 04:08:03 +00:00

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