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| author | Jakub Jelinek <jakub@redhat.com> | 2008-10-29 17:07:39 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2008-10-29 17:07:39 +0100 |
| commit | 7d293b587a78e9a779620da1519fab0c577de19a (patch) | |
| tree | 21f02a1ca2098a2e0f7ed9fdcbc9e7e08831ede5 /gcc/expmed.c | |
| parent | d3f7b2c67ed130a856a1d7425e76d69d47bb6006 (diff) | |
| download | gcc-7d293b587a78e9a779620da1519fab0c577de19a.zip gcc-7d293b587a78e9a779620da1519fab0c577de19a.tar.gz gcc-7d293b587a78e9a779620da1519fab0c577de19a.tar.bz2 | |
re PR middle-end/37870 (ICE in extract_bit_field_1)
PR middle-end/37870
* expmed.c (extract_bit_field_1): If int_mode_for_mode returns
BLKmode for non-memory, convert using a wider MODE_INT mode
or through memory.
* gcc.target/i386/pr37870.c: New test.
From-SVN: r141430
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index 5e8d7f3..0c7e611 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -1,7 +1,7 @@ /* Medium-level subroutines: convert bit-field store and extract and shifts, multiplies and divides to rtl instructions. Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 + 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of GCC. @@ -1278,9 +1278,8 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize, { if (MEM_P (op0)) op0 = adjust_address (op0, imode, 0); - else + else if (imode != BLKmode) { - gcc_assert (imode != BLKmode); op0 = gen_lowpart (imode, op0); /* If we got a SUBREG, force it into a register since we @@ -1288,6 +1287,24 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize, if (GET_CODE (op0) == SUBREG) op0 = force_reg (imode, op0); } + else if (REG_P (op0)) + { + rtx reg, subreg; + imode = smallest_mode_for_size (GET_MODE_BITSIZE (GET_MODE (op0)), + MODE_INT); + reg = gen_reg_rtx (imode); + subreg = gen_lowpart_SUBREG (GET_MODE (op0), reg); + emit_move_insn (subreg, op0); + op0 = reg; + bitnum += SUBREG_BYTE (subreg) * BITS_PER_UNIT; + } + else + { + rtx mem = assign_stack_temp (GET_MODE (op0), + GET_MODE_SIZE (GET_MODE (op0)), 0); + emit_move_insn (mem, op0); + op0 = adjust_address (mem, BLKmode, 0); + } } } |