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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-10-29 07:45:32 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-10-29 07:45:32 -0500 |
| commit | 2d43e08975235eb5d3407cfd320685dcb909e4bb (patch) | |
| tree | f53e80e093c506b4ad1edabd58b81e78710f541c /gcc/stupid.c | |
| parent | 4f069e1470c4850d37991c0c7406da09e5acc544 (diff) | |
| download | gcc-2d43e08975235eb5d3407cfd320685dcb909e4bb.tar.gz | |
(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
Diffstat (limited to 'gcc/stupid.c')
| -rw-r--r-- | gcc/stupid.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/gcc/stupid.c b/gcc/stupid.c index fb50b92a5ae..ed1afcf7dbe 100644 --- a/gcc/stupid.c +++ b/gcc/stupid.c @@ -1,5 +1,5 @@ /* 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. @@ -423,10 +423,19 @@ stupid_mark_refs (x, insn) 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. */ - 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. */ if (regno < FIRST_PSEUDO_REGISTER) |