(stupid_mark_refs): Handle SUBREG of pseudo-reg in a SET_DEST same as
we handle a pseudo-reg in a SET_DEST. From-SVN: r10541
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gcc/stupid.c
13
gcc/stupid.c
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@ -1,5 +1,5 @@
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/* Dummy data flow analysis for GNU compiler in nonoptimizing mode.
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/* Dummy data flow analysis for GNU compiler in nonoptimizing mode.
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Copyright (C) 1987, 1991, 1994 Free Software Foundation, Inc.
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Copyright (C) 1987, 1991, 1994, 1995 Free Software Foundation, Inc.
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This file is part of GNU CC.
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This file is part of GNU CC.
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@ -423,9 +423,18 @@ stupid_mark_refs (x, insn)
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if (code == SET || code == CLOBBER)
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if (code == SET || code == CLOBBER)
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{
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{
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if (SET_DEST (x) != 0 && GET_CODE (SET_DEST (x)) == REG)
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if (SET_DEST (x) != 0
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&& (GET_CODE (SET_DEST (x)) == REG
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|| (GET_CODE (SET_DEST (x)) == SUBREG
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&& GET_CODE (SUBREG_REG (SET_DEST (x))) == REG
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&& (REGNO (SUBREG_REG (SET_DEST (x)))
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>= FIRST_PSEUDO_REGISTER))))
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{
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{
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/* Register is being assigned. */
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/* Register is being assigned. */
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/* If setting a SUBREG, we treat the entire reg as being set. */
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if (GET_CODE (SET_DEST (x)) == SUBREG)
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regno = REGNO (SUBREG_REG (SET_DEST (x)));
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else
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regno = REGNO (SET_DEST (x));
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regno = REGNO (SET_DEST (x));
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/* For hard regs, update the where-live info. */
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/* For hard regs, update the where-live info. */
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