From f1e60ec6d51d64b0a9d7683ba0bb8728f72aa6b8 Mon Sep 17 00:00:00 2001 From: Richard Stallman Date: Sun, 10 May 1992 01:56:55 +0000 Subject: [PATCH] *** empty log message *** From-SVN: r951 --- gcc/fold-const.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 2b39c1153e53..75f5c18eee11 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -2027,24 +2027,26 @@ optimize_bit_field_compare (code, compare_type, lhs, rhs) int lvolatilep = 0, rvolatilep = 0; tree linner, rinner; tree mask; + tree offset; /* Get all the information about the extractions being done. If the bit size if the same as the size of the underlying object, we aren't doing an extraction at all and so can do nothing. */ - linner = get_inner_reference (lhs, &lbitsize, &lbitpos, &lmode, + linner = get_inner_reference (lhs, &lbitsize, &lbitpos, &offset, &lmode, &lunsignedp, &lvolatilep); - if (lbitsize == GET_MODE_BITSIZE (lmode) || lbitsize < 0) + if (lbitsize == GET_MODE_BITSIZE (lmode) || lbitsize < 0 + || offset != 0) return 0; if (!const_p) { /* If this is not a constant, we can only do something if bit positions, sizes, and signedness are the same. */ - rinner = get_inner_reference (rhs, &rbitsize, &rbitpos, + rinner = get_inner_reference (rhs, &rbitsize, &rbitpos, &offset, &rmode, &runsignedp, &rvolatilep); if (lbitpos != rbitpos || lbitsize != rbitsize - || lunsignedp != runsignedp) + || lunsignedp != runsignedp || offset != 0) return 0; } @@ -2204,6 +2206,7 @@ decode_field_reference (exp, pbitsize, pbitpos, pmode, punsignedp, { tree mask = 0; tree inner; + tree offset; STRIP_NOPS (exp); @@ -2220,9 +2223,9 @@ decode_field_reference (exp, pbitsize, pbitpos, pmode, punsignedp, && TREE_CODE (exp) != BIT_FIELD_REF) return 0; - inner = get_inner_reference (exp, pbitsize, pbitpos, pmode, + inner = get_inner_reference (exp, pbitsize, pbitpos, &offset, pmode, punsignedp, pvolatilep); - if (*pbitsize < 0) + if (*pbitsize < 0 || offset != 0) return 0; if (mask == 0) -- 2.43.5