From 54c2fc721cbe654695433d7419cb9b74f3a13642 Mon Sep 17 00:00:00 2001 From: James E Wilson Date: Fri, 13 Jun 2003 22:13:07 +0000 Subject: re PR bootstrap/10983 ([SPARC64] ICE in verify_wide_reg, at flow.c:551, while compiling libjava) PR bootstrap/10983 * combine.c (make_extraction): Use gen_lowpart_for_combine when extracting from a REG and not in the destination of a SET. Co-Authored-By: Eric Botcazou From-SVN: r67916 --- gcc/combine.c | 49 +++++++++++++++++++++++++++---------------------- 1 file changed, 27 insertions(+), 22 deletions(-) (limited to 'gcc/combine.c') diff --git a/gcc/combine.c b/gcc/combine.c index 3e2f089..1638576 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6139,30 +6139,35 @@ make_extraction (enum machine_mode mode, rtx inner, HOST_WIDE_INT pos, } else if (GET_CODE (inner) == REG) { - /* We can't call gen_lowpart_for_combine here since we always want - a SUBREG and it would sometimes return a new hard register. */ if (tmode != inner_mode) { - HOST_WIDE_INT final_word = pos / BITS_PER_WORD; - - if (WORDS_BIG_ENDIAN - && GET_MODE_SIZE (inner_mode) > UNITS_PER_WORD) - final_word = ((GET_MODE_SIZE (inner_mode) - - GET_MODE_SIZE (tmode)) - / UNITS_PER_WORD) - final_word; - - final_word *= UNITS_PER_WORD; - if (BYTES_BIG_ENDIAN && - GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (tmode)) - final_word += (GET_MODE_SIZE (inner_mode) - - GET_MODE_SIZE (tmode)) % UNITS_PER_WORD; - - /* Avoid creating invalid subregs, for example when - simplifying (x>>32)&255. */ - if (final_word >= GET_MODE_SIZE (inner_mode)) - return NULL_RTX; - - new = gen_rtx_SUBREG (tmode, inner, final_word); + if (in_dest) + { + /* We can't call gen_lowpart_for_combine here since we always want + a SUBREG and it would sometimes return a new hard register. */ + HOST_WIDE_INT final_word = pos / BITS_PER_WORD; + + if (WORDS_BIG_ENDIAN + && GET_MODE_SIZE (inner_mode) > UNITS_PER_WORD) + final_word = ((GET_MODE_SIZE (inner_mode) + - GET_MODE_SIZE (tmode)) + / UNITS_PER_WORD) - final_word; + + final_word *= UNITS_PER_WORD; + if (BYTES_BIG_ENDIAN && + GET_MODE_SIZE (inner_mode) > GET_MODE_SIZE (tmode)) + final_word += (GET_MODE_SIZE (inner_mode) + - GET_MODE_SIZE (tmode)) % UNITS_PER_WORD; + + /* Avoid creating invalid subregs, for example when + simplifying (x>>32)&255. */ + if (final_word >= GET_MODE_SIZE (inner_mode)) + return NULL_RTX; + + new = gen_rtx_SUBREG (tmode, inner, final_word); + } + else + new = gen_lowpart_for_combine (tmode, inner); } else new = inner; -- cgit v1.1