18 lines
679 B
Diff
18 lines
679 B
Diff
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63740
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--- trunk/gcc/lra-lives.c 2014/06/16 09:25:26 211700
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+++ trunk/gcc/lra-lives.c 2014/06/16 09:58:34 211701
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@@ -558,7 +558,11 @@
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/* It might be 'inheritance pseudo <- reload pseudo'. */
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|| (src_regno >= lra_constraint_new_regno_start
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&& ((int) REGNO (SET_DEST (set))
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- >= lra_constraint_new_regno_start))))
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+ >= lra_constraint_new_regno_start)
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+ /* Remember to skip special cases where src/dest regnos are
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+ the same, e.g. insn SET pattern has matching constraints
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+ like =r,0. */
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+ && src_regno != (int) REGNO (SET_DEST (set)))))
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{
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int hard_regno = -1, regno = -1;
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