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| author | Dale Johannesen <dalej@apple.com> | 2005-11-30 18:19:16 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@gcc.gnu.org> | 2005-11-30 18:19:16 +0000 |
| commit | f6173932d327c20b74dd73676deae86aafed35a8 (patch) | |
| tree | c34dd7d789f3dd43cbf0595491f13705e8035ef6 /gcc/combine.c | |
| parent | 99c7ab426c16387fb2a27681f54b0ca4ff853b69 (diff) | |
| download | gcc-f6173932d327c20b74dd73676deae86aafed35a8.zip gcc-f6173932d327c20b74dd73676deae86aafed35a8.tar.gz gcc-f6173932d327c20b74dd73676deae86aafed35a8.tar.bz2 | |
combine.c (find_split_point): Sign extend bitmask when changing bitfield assignment to IOR of AND.
2005-11-30 Dale Johannesen <dalej@apple.com>
Andrew Pinski <pinskia@physics.uc.edu>
* combine.c (find_split_point): Sign extend bitmask
when changing bitfield assignment to IOR of AND.
2005-11-30 Dale Johannesen <dalej@apple.com>
* gcc.c-torture/compile/pr24930.c: New.
Co-Authored-By: Andrew Pinski <pinskia@physics.uc.edu>
From-SVN: r107731
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index abd6458..08cacab 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -3361,13 +3361,15 @@ find_split_point (rtx *loc, rtx insn) rtx dest = XEXP (SET_DEST (x), 0); enum machine_mode mode = GET_MODE (dest); unsigned HOST_WIDE_INT mask = ((HOST_WIDE_INT) 1 << len) - 1; + rtx or_mask; if (BITS_BIG_ENDIAN) pos = GET_MODE_BITSIZE (mode) - len - pos; + or_mask = gen_int_mode (src << pos, mode); if (src == mask) SUBST (SET_SRC (x), - simplify_gen_binary (IOR, mode, dest, GEN_INT (src << pos))); + simplify_gen_binary (IOR, mode, dest, or_mask)); else { rtx negmask = gen_int_mode (~(mask << pos), mode); @@ -3375,7 +3377,7 @@ find_split_point (rtx *loc, rtx insn) simplify_gen_binary (IOR, mode, simplify_gen_binary (AND, mode, dest, negmask), - GEN_INT (src << pos))); + or_mask)); } SUBST (SET_DEST (x), dest); |