Blame gcc-target-expr.patch
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2001-03-16 Jakub Jelinek <jakub@redhat.com>
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* expr.c (expand_expr): If TARGET_EXPR is putting a non-constant
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variable into place of constant variable, clear the /u flag if
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possible.
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--- gcc/expr.c.jj Mon Mar 12 13:41:38 2001
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+++ gcc/expr.c Fri Mar 16 19:46:26 2001
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@@ -8167,6 +8167,17 @@ expand_expr (exp, target, tmode, modifie
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else
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{
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DECL_RTL (slot) = target;
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+
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+ /* If target is unchanging, but slot is not, we could end up
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+ initializing the unchanging target through non-unchanging
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+ references. */
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+ if (RTX_UNCHANGING_P (target) && ! TREE_READONLY (slot)
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+ && (GET_CODE (target) == REG
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+ || (GET_CODE (target) == MEM
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+ && GET_CODE (XEXP (target, 0)) == ADDRESSOF
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+ && GET_CODE (XEXP (XEXP (target, 0), 0)) == REG)))
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+ RTX_UNCHANGING_P (target) = 0;
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+
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/* If we must have an addressable slot, then make sure that
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the RTL that we just stored in slot is OK. */
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if (TREE_ADDRESSABLE (slot))
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