22 lines
932 B
Diff
22 lines
932 B
Diff
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--- gcc-3.2.1/gcc/reload1.c.orig 2002-10-10 09:40:20.000000000 -0600
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+++ gcc-3.2.1/gcc/reload1.c 2003-01-30 12:15:05.000000000 -0700
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@@ -8674,7 +8674,9 @@
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... (MEM (PLUS (REGZ) (REGY)))... .
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First, check that we have (set (REGX) (PLUS (REGX) (REGY)))
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- and that we know all uses of REGX before it dies. */
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+ and that we know all uses of REGX before it dies.
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+ Also, explicitly check that REGX != REGY; our life information
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+ does not yet show whether REGY changes in this insn. */
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set = single_set (insn);
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if (set != NULL_RTX
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&& GET_CODE (SET_DEST (set)) == REG
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@@ -8684,6 +8686,7 @@
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&& GET_CODE (SET_SRC (set)) == PLUS
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&& GET_CODE (XEXP (SET_SRC (set), 1)) == REG
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&& rtx_equal_p (XEXP (SET_SRC (set), 0), SET_DEST (set))
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+ && !rtx_equal_p (XEXP (SET_SRC (set), 1), SET_DEST (set))
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&& last_label_ruid < reg_state[REGNO (SET_DEST (set))].use_ruid)
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{
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rtx reg = SET_DEST (set);
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