(store_expr): Disable optimization of using convert if exp's type is a
subtype. From-SVN: r12992
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@ -3125,8 +3125,11 @@ store_expr (exp, target, want_value)
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/* If we don't want a value, we can do the conversion inside EXP,
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which will often result in some optimizations. Do the conversion
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in two steps: first change the signedness, if needed, then
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the extend. */
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if (! want_value)
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the extend. But don't do this if the type of EXP is a subtype
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of something else since then the conversion might involve
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more than just converting modes. */
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if (! want_value && INTEGRAL_TYPE_P (TREE_TYPE (exp))
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&& TREE_TYPE (TREE_TYPE (exp)) == 0)
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{
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if (TREE_UNSIGNED (TREE_TYPE (exp))
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!= SUBREG_PROMOTED_UNSIGNED_P (target))
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