From 3115c00d859324d044aa4cf0a150d9b47c3a82c9 Mon Sep 17 00:00:00 2001 From: Andy Hutchinson Date: Mon, 9 Jun 2008 22:38:34 +0000 Subject: [PATCH] re PR middle-end/36447 (simplify_subreg ICE with right shift more than length type AVR) PR middle-end/36447 * simplify-rtx.c (simplify_subreg): Add check for shift count greater than size. From-SVN: r136602 --- gcc/ChangeLog | 6 ++++++ gcc/simplify-rtx.c | 1 + 2 files changed, 7 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f3fbaa29f93..de089334244 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-06-09 Andy Hutchinson + + PR middle-end/36447 + * simplify-rtx.c (simplify_subreg): Add check for shift count + greater than size. + 2008-06-09 Richard Sandiford * doc/md.texi: Synchronize with later constraints.md change. diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 15e4c2a3424..262c9194937 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -5265,6 +5265,7 @@ simplify_subreg (enum machine_mode outermode, rtx op, && GET_MODE_BITSIZE (innermode) >= (2 * GET_MODE_BITSIZE (outermode)) && GET_CODE (XEXP (op, 1)) == CONST_INT && (INTVAL (XEXP (op, 1)) & (GET_MODE_BITSIZE (outermode) - 1)) == 0 + && INTVAL (XEXP (op, 1)) < GET_MODE_BITSIZE (innermode) && byte == subreg_lowpart_offset (outermode, innermode)) { int shifted_bytes = INTVAL (XEXP (op, 1)) / BITS_PER_UNIT; -- 2.30.2