search for: pr4668

...s he's building the new RA infrastructure > > > I am not sure I completely understand the problem here since the PRs don't reproduce on TOT, but it sounds like a physical register is live across an inline asm that needs all the registers. I've uploaded a re-reduced testcase to PR4668; your guess appears to be correct, or at least close. > This can happen if the register coalescer decides to coalesce a physreg with a virtreg that is live across the inline asm. This is not easy to detect without a bad compile time regression. > > I suppose something similar could happen...

On Aug 21, 2010, at 5:27 PM, Eli Friedman wrote: > See http://llvm.org/bugs/show_bug.cgi?id=4668 and > http://llvm.org/bugs/show_bug.cgi?id=5010. The basic description of > the issue (from http://llvm.org/bugs/show_bug.cgi?id=4668#c5): "The > fundamental problem is we can't spill a register once it's fixed to a > physical register." > >> From discussion

See http://llvm.org/bugs/show_bug.cgi?id=4668 and http://llvm.org/bugs/show_bug.cgi?id=5010. The basic description of the issue (from http://llvm.org/bugs/show_bug.cgi?id=4668#c5): "The fundamental problem is we can't spill a register once it's fixed to a physical register." >From discussion on IRC: [17:14] <_sabre_> efriedma: sounds like a RA bug in linscan [17:14]