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riscv-gcc-1
Commit 2d43e089 by Richard Kenner
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(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
parent 4f069e14
Showing with 12 additions and 3 deletions
gcc/stupid.c
/* Dummy data flow analysis for GNU compiler in nonoptimizing mode. /* Dummy data flow analysis for GNU compiler in nonoptimizing mode.
Copyright (C) 1987, 1991, 1994 Free Software Foundation, Inc. Copyright (C) 1987, 1991, 1994, 1995 Free Software Foundation, Inc.
This file is part of GNU CC. This file is part of GNU CC.
...@@ -423,10 +423,19 @@ stupid_mark_refs (x, insn) ...@@ -423,10 +423,19 @@ stupid_mark_refs (x, insn)
if (code == SET || code == CLOBBER) if (code == SET || code == CLOBBER)
{ {
if (SET_DEST (x) != 0 && GET_CODE (SET_DEST (x)) == REG) if (SET_DEST (x) != 0
&& (GET_CODE (SET_DEST (x)) == REG
|| (GET_CODE (SET_DEST (x)) == SUBREG
&& GET_CODE (SUBREG_REG (SET_DEST (x))) == REG
&& (REGNO (SUBREG_REG (SET_DEST (x)))
>= FIRST_PSEUDO_REGISTER))))
{ {
/* Register is being assigned. */ /* Register is being assigned. */
regno = REGNO (SET_DEST (x)); /* If setting a SUBREG, we treat the entire reg as being set. */
if (GET_CODE (SET_DEST (x)) == SUBREG)
regno = REGNO (SUBREG_REG (SET_DEST (x)));
else
regno = REGNO (SET_DEST (x));
/* For hard regs, update the where-live info. */ /* For hard regs, update the where-live info. */
if (regno < FIRST_PSEUDO_REGISTER) if (regno < FIRST_PSEUDO_REGISTER)
......
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