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Please find attached a patch that improves the instrcution sinking
pass so that it is able to handle things such as<br>
<br>
a = ...<br>
if (...) {<br>
} else {<br>
}<br>
... = a // first use of a<br>
<br>
I added a simple test for this (included in the patch) and make
check does not report any regression (ubuntu x86 12.04).<br>
<br>
B.r.,<br>
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