From 9199d62b824513e2e5cd943f87e5e1a958a9f4ea Mon Sep 17 00:00:00 2001 From: DJ Delorie Date: Fri, 29 Jun 2001 17:15:01 -0400 Subject: [PATCH] simplify-rtx.c (simplify_subreg): When simplifying a CONCAT... * simplify-rtx.c (simplify_subreg): When simplifying a CONCAT, at least get rid of the CONCAT if we can't simplify further. From-SVN: r43659 --- gcc/ChangeLog | 5 +++++ gcc/simplify-rtx.c | 7 ++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 407ae100a22..1feafbef801 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2001-06-29 DJ Delorie + + * simplify-rtx.c (simplify_subreg): When simplifying a CONCAT, at + least get rid of the CONCAT if we can't simplify further. + Fri Jun 29 12:27:24 2001 Jeffrey A Law (law@cygnus.com) * ssa-dce.c (ssa_eliminate_dead_code): Renamed from diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index a5ef0993600..20471cc5d5e 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -2430,9 +2430,14 @@ simplify_subreg (outermode, op, innermode, byte) int is_realpart = byte < GET_MODE_UNIT_SIZE (innermode); rtx part = is_realpart ? XEXP (op, 0) : XEXP (op, 1); unsigned int final_offset; + rtx res; final_offset = byte % (GET_MODE_UNIT_SIZE (innermode)); - return simplify_subreg (outermode, part, GET_MODE (part), final_offset); + res = simplify_subreg (outermode, part, GET_MODE (part), final_offset); + if (res) + return res; + /* We can at least simplify it by referring directly to the relevent part. */ + return gen_rtx_SUBREG (outermode, part, final_offset); } return NULL_RTX; -- 2.30.2