[PATCH] Avoid combining adjacent stores at -O0 to improve debug experience

[Paul Robinson]

If I disable DAGCombine at -O0, I get 19 test failures including two crashes.
Abstractly it seems reasonable to do that, or at least identify and separate out the combines that have to run even at -O0; but we're not there now, and I'm probably not the right person to figure that stuff out.
How about I commit the patch as is, and file a bug for disabling DAGCombine at -O0?


http://reviews.llvm.org/D7181

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